Extracting prog: 7m33.251366743s
Minimizing prog: 1h2m43.064468265s
Simplifying prog options: 9m46.955241885s
Extracting C: 5m16.168686901s
Simplifying C: 0s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program crashed: INFO: task hung in do_get_write_access
program crashed: INFO: task hung in do_get_write_access
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, 0xffffffffffffffff, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-openat-mmap
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(0x0, 0x0, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', 0x0, 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program crashed: INFO: task hung in jbd2_journal_commit_transaction
a never seen crash title: INFO: task hung in jbd2_journal_commit_transaction, ignore
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program crashed: INFO: task hung in corrupted
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program crashed: INFO: task hung in do_get_write_access
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)
program crashed: INFO: task hung in do_get_write_access
validation run: crashed=true
reproducing took 1h36m15.422676646s
repro crashed as (corrupted=false):
INFO: task kworker/u8:13:[ 362.265765][ T39] INFO: task kworker/u8:13:5720 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:13 state:D stack:22176 pid:5720 tgid:5720 ppid:2 task_flags:0x4248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_mb_mark_context+0x171/0xec0 fs/ext4/mballoc.c:4111
ext4_mb_mark_diskspace_used+0x338/0x760 fs/ext4/mballoc.c:4240
ext4_mb_new_blocks+0x106f/0x4540 fs/ext4/mballoc.c:6328
ext4_ext_map_blocks+0x1534/0x5850 fs/ext4/extents.c:4461
ext4_map_create_blocks+0x116/0x530 fs/ext4/inode.c:631
ext4_map_blocks+0x7e4/0x1240 fs/ext4/inode.c:824
mpage_map_one_extent fs/ext4/inode.c:2397 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2491 [inline]
ext4_do_writepages+0x23d6/0x47a0 fs/ext4/inode.c:2949
ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043
do_writepages+0x338/0x560 mm/page-writeback.c:2561
__writeback_single_inode+0x12e/0xf90 fs/fs-writeback.c:1787
writeback_sb_inodes+0x9db/0x1ab0 fs/fs-writeback.c:2079
__writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2155
wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2266
wb_check_old_data_flush fs/fs-writeback.c:2370 [inline]
wb_do_writeback fs/fs-writeback.c:2449 [inline]
wb_workfn+0xc98/0x10f0 fs/fs-writeback.c:2477
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5759 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21128 pid:5759 tgid:5759 ppid:5753 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
__ext4_new_inode+0x128b/0x3e40 fs/ext4/ialloc.c:1099
ext4_mkdir+0x3ee/0xca0 fs/ext4/namei.c:3012
vfs_mkdir+0x408/0x620 fs/namei.c:5270
filename_mkdirat+0x289/0x520 fs/namei.c:5303
__do_sys_mkdirat fs/namei.c:5324 [inline]
__se_sys_mkdirat+0x35/0x150 fs/namei.c:5321
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8756ffcf47
RSP: 002b:00007ffc5cd4e548 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f8757094a68 RCX: 00007f8756ffcf47
RDX: 00000000000001ff RSI: 00007f8757094a68 RDI: 00000000ffffff9c
RBP: 00007ffc5cd4e5d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc5cd4e5d8
R13: 0000000000000002 R14: 00007ffc5cd4e7b8 R15: 0000000000000000
INFO: task syz-executor:5761 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20976 pid:5761 tgid:5761 ppid:5752 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
__ext4_new_inode+0x128b/0x3e40 fs/ext4/ialloc.c:1099
ext4_mkdir+0x3ee/0xca0 fs/ext4/namei.c:3012
vfs_mkdir+0x408/0x620 fs/namei.c:5270
filename_mkdirat+0x289/0x520 fs/namei.c:5303
__do_sys_mkdirat fs/namei.c:5324 [inline]
__se_sys_mkdirat+0x35/0x150 fs/namei.c:5321
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8ac01cf47
RSP: 002b:00007fffb48c4108 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fa8ac0b4a68 RCX: 00007fa8ac01cf47
RDX: 00000000000001ff RSI: 00007fa8ac0b4a68 RDI: 00000000ffffff9c
RBP: 00007fffb48c4190 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fffb48c4198
R13: 0000000000000002 R14: 00007fffb48c4378 R15: 0000000000000000
INFO: task syz.0.24:6010 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.24 state:D stack:27704 pid:6010 tgid:6010 ppid:5754 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6427
__ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709
generic_update_time fs/inode.c:2254 [inline]
file_update_time_flags+0x3f4/0x4b0 fs/inode.c:2484
ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6805
do_page_mkwrite+0x14a/0x310 mm/memory.c:3761
do_shared_fault mm/memory.c:6021 [inline]
do_fault mm/memory.c:6083 [inline]
do_pte_missing+0x734/0x28f0 mm/memory.c:4645
handle_pte_fault mm/memory.c:6503 [inline]
__handle_mm_fault mm/memory.c:6652 [inline]
handle_mm_fault+0xf95/0x28d0 mm/memory.c:6821
do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fcdda58ba23
RSP: 002b:00007ffded543ea0 EFLAGS: 00010246
RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b34324000 RSI: 0000000000040000 RDI: 00007fcdda900708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffded544130
INFO: task syz.3.25:6011 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.25 state:D stack:28232 pid:6011 tgid:6011 ppid:5762 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6427
__ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709
generic_update_time fs/inode.c:2254 [inline]
file_update_time_flags+0x3f4/0x4b0 fs/inode.c:2484
ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6805
do_page_mkwrite+0x14a/0x310 mm/memory.c:3761
do_shared_fault mm/memory.c:6021 [inline]
do_fault mm/memory.c:6083 [inline]
do_pte_missing+0x734/0x28f0 mm/memory.c:4645
handle_pte_fault mm/memory.c:6503 [inline]
__handle_mm_fault mm/memory.c:6652 [inline]
handle_mm_fault+0xf95/0x28d0 mm/memory.c:6821
do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fe1c0f5ba23
RSP: 002b:00007ffd6afcac30 EFLAGS: 00010246
RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b34824000 RSI: 0000000000040000 RDI: 00007fe1c12d0708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd6afcaec0
Showing all locks held in the system:
locks held by khungtaskd/39: 1, last CPU#0:
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6835
locks held by getty/5341: 2, on CPU#1:
#0: ffff8880333760a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900044c32e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor/5622: 3, on CPU#0:
#0: ffff888021a96448 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by kworker/u8:13/5720: 6, on CPU#0:
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7fd/0x1480 kernel/workqueue.c:3344
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7fd/0x1480 kernel/workqueue.c:3344
#2: ffff88803623e0e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:688
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline]
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x205/0x3b0 fs/ext4/inode.c:3042
#4: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
#5: ffff8880405e3dc0 (&ei->i_data_sem#2){++++}-{4:4}, at: ext4_map_blocks+0x7cc/0x1240 fs/ext4/inode.c:823
locks held by syz-executor/5759: 3, on CPU#1:
#0: ffff88803623e510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4949
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz-executor/5761: 3, on CPU#0:
#0: ffff88803623e510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4949
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz.0.24/6010: 3, on CPU#1:
#0: ffff88804d42b088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz.3.25/6011: 3, on CPU#0:
#0: ffff888036661d08 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:check_preemption_disabled+0x22/0xe0 lib/smp_processor_id.c:53
Code: 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 d7 9e 72 07 65 8b 0d cc 9e 72 07 f7 c1 ff ff ff 7f 74 0c 5b 41 5e 41 5f 5d cc cc cc cc cc 9c 59 f7 c1 00 02 00 00 74 ea 65 4c 8b 3d 7e 9e
RSP: 0018:ffffc90000a5fd08 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff88801e2f8000 RCX: 0000000000000046
RDX: 0000000010530efd RSI: ffffffff8d9a57be RDI: ffffffff8bcbd080
RBP: 0000000000000100 R08: 9c00000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e3c3880 R12: ffff88801e2f8000
R13: 1ffff11003c5f17f R14: ffffffff818862a4 R15: 0000000000000046
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561793dfd168 CR3: 000000000e1b0000 CR4: 00000000003526f0
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:465 [inline]
lockdep_softirqs_on+0x6c/0x190 kernel/locking/lockdep.c:4559
__local_bh_enable+0x50/0x2f0 kernel/softirq.c:234
ksoftirqd_run_end kernel/softirq.c:325 [inline]
run_ksoftirqd+0x74/0x180 kernel/softirq.c:1081
smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
final repro crashed as (corrupted=false):
INFO: task kworker/u8:13:[ 362.265765][ T39] INFO: task kworker/u8:13:5720 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:13 state:D stack:22176 pid:5720 tgid:5720 ppid:2 task_flags:0x4248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_mb_mark_context+0x171/0xec0 fs/ext4/mballoc.c:4111
ext4_mb_mark_diskspace_used+0x338/0x760 fs/ext4/mballoc.c:4240
ext4_mb_new_blocks+0x106f/0x4540 fs/ext4/mballoc.c:6328
ext4_ext_map_blocks+0x1534/0x5850 fs/ext4/extents.c:4461
ext4_map_create_blocks+0x116/0x530 fs/ext4/inode.c:631
ext4_map_blocks+0x7e4/0x1240 fs/ext4/inode.c:824
mpage_map_one_extent fs/ext4/inode.c:2397 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2491 [inline]
ext4_do_writepages+0x23d6/0x47a0 fs/ext4/inode.c:2949
ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043
do_writepages+0x338/0x560 mm/page-writeback.c:2561
__writeback_single_inode+0x12e/0xf90 fs/fs-writeback.c:1787
writeback_sb_inodes+0x9db/0x1ab0 fs/fs-writeback.c:2079
__writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2155
wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2266
wb_check_old_data_flush fs/fs-writeback.c:2370 [inline]
wb_do_writeback fs/fs-writeback.c:2449 [inline]
wb_workfn+0xc98/0x10f0 fs/fs-writeback.c:2477
process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
process_scheduled_works kernel/workqueue.c:3462 [inline]
worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5759 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21128 pid:5759 tgid:5759 ppid:5753 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
__ext4_new_inode+0x128b/0x3e40 fs/ext4/ialloc.c:1099
ext4_mkdir+0x3ee/0xca0 fs/ext4/namei.c:3012
vfs_mkdir+0x408/0x620 fs/namei.c:5270
filename_mkdirat+0x289/0x520 fs/namei.c:5303
__do_sys_mkdirat fs/namei.c:5324 [inline]
__se_sys_mkdirat+0x35/0x150 fs/namei.c:5321
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8756ffcf47
RSP: 002b:00007ffc5cd4e548 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f8757094a68 RCX: 00007f8756ffcf47
RDX: 00000000000001ff RSI: 00007f8757094a68 RDI: 00000000ffffff9c
RBP: 00007ffc5cd4e5d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc5cd4e5d8
R13: 0000000000000002 R14: 00007ffc5cd4e7b8 R15: 0000000000000000
INFO: task syz-executor:5761 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20976 pid:5761 tgid:5761 ppid:5752 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
__ext4_new_inode+0x128b/0x3e40 fs/ext4/ialloc.c:1099
ext4_mkdir+0x3ee/0xca0 fs/ext4/namei.c:3012
vfs_mkdir+0x408/0x620 fs/namei.c:5270
filename_mkdirat+0x289/0x520 fs/namei.c:5303
__do_sys_mkdirat fs/namei.c:5324 [inline]
__se_sys_mkdirat+0x35/0x150 fs/namei.c:5321
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8ac01cf47
RSP: 002b:00007fffb48c4108 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fa8ac0b4a68 RCX: 00007fa8ac01cf47
RDX: 00000000000001ff RSI: 00007fa8ac0b4a68 RDI: 00000000ffffff9c
RBP: 00007fffb48c4190 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fffb48c4198
R13: 0000000000000002 R14: 00007fffb48c4378 R15: 0000000000000000
INFO: task syz.0.24:6010 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.24 state:D stack:27704 pid:6010 tgid:6010 ppid:5754 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6427
__ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709
generic_update_time fs/inode.c:2254 [inline]
file_update_time_flags+0x3f4/0x4b0 fs/inode.c:2484
ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6805
do_page_mkwrite+0x14a/0x310 mm/memory.c:3761
do_shared_fault mm/memory.c:6021 [inline]
do_fault mm/memory.c:6083 [inline]
do_pte_missing+0x734/0x28f0 mm/memory.c:4645
handle_pte_fault mm/memory.c:6503 [inline]
__handle_mm_fault mm/memory.c:6652 [inline]
handle_mm_fault+0xf95/0x28d0 mm/memory.c:6821
do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fcdda58ba23
RSP: 002b:00007ffded543ea0 EFLAGS: 00010246
RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b34324000 RSI: 0000000000040000 RDI: 00007fcdda900708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffded544130
INFO: task syz.3.25:6011 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.25 state:D stack:28232 pid:6011 tgid:6011 ppid:5762 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7231
__schedule_loop kernel/sched/core.c:7308 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7323
io_schedule+0x7f/0xd0 kernel/sched/core.c:8151
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x670/0x1090 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d6/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0x1c3/0x590 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6427
__ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709
generic_update_time fs/inode.c:2254 [inline]
file_update_time_flags+0x3f4/0x4b0 fs/inode.c:2484
ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6805
do_page_mkwrite+0x14a/0x310 mm/memory.c:3761
do_shared_fault mm/memory.c:6021 [inline]
do_fault mm/memory.c:6083 [inline]
do_pte_missing+0x734/0x28f0 mm/memory.c:4645
handle_pte_fault mm/memory.c:6503 [inline]
__handle_mm_fault mm/memory.c:6652 [inline]
handle_mm_fault+0xf95/0x28d0 mm/memory.c:6821
do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fe1c0f5ba23
RSP: 002b:00007ffd6afcac30 EFLAGS: 00010246
RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b34824000 RSI: 0000000000040000 RDI: 00007fe1c12d0708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd6afcaec0
Showing all locks held in the system:
locks held by khungtaskd/39: 1, last CPU#0:
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e3c3880 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6835
locks held by getty/5341: 2, on CPU#1:
#0: ffff8880333760a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900044c32e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor/5622: 3, on CPU#0:
#0: ffff888021a96448 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by kworker/u8:13/5720: 6, on CPU#0:
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffff8880206af938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7fd/0x1480 kernel/workqueue.c:3344
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffc90004a4fc60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7fd/0x1480 kernel/workqueue.c:3344
#2: ffff88803623e0e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:688
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline]
#3: ffff888036b60cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x205/0x3b0 fs/ext4/inode.c:3042
#4: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
#5: ffff8880405e3dc0 (&ei->i_data_sem#2){++++}-{4:4}, at: ext4_map_blocks+0x7cc/0x1240 fs/ext4/inode.c:823
locks held by syz-executor/5759: 3, on CPU#1:
#0: ffff88803623e510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888055f8a7b0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4949
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz-executor/5761: 3, on CPU#0:
#0: ffff88803623e510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888055f89bd8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4949
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz.0.24/6010: 3, on CPU#1:
#0: ffff88804d42b088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
locks held by syz.3.25/6011: 3, on CPU#0:
#0: ffff888036661d08 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff88803623e688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6804
#2: ffff88803623abb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:check_preemption_disabled+0x22/0xe0 lib/smp_processor_id.c:53
Code: 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 d7 9e 72 07 65 8b 0d cc 9e 72 07 f7 c1 ff ff ff 7f 74 0c 5b 41 5e 41 5f 5d cc cc cc cc cc 9c 59 f7 c1 00 02 00 00 74 ea 65 4c 8b 3d 7e 9e
RSP: 0018:ffffc90000a5fd08 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff88801e2f8000 RCX: 0000000000000046
RDX: 0000000010530efd RSI: ffffffff8d9a57be RDI: ffffffff8bcbd080
RBP: 0000000000000100 R08: 9c00000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e3c3880 R12: ffff88801e2f8000
R13: 1ffff11003c5f17f R14: ffffffff818862a4 R15: 0000000000000046
FS: 0000000000000000(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561793dfd168 CR3: 000000000e1b0000 CR4: 00000000003526f0
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:465 [inline]
lockdep_softirqs_on+0x6c/0x190 kernel/locking/lockdep.c:4559
__local_bh_enable+0x50/0x2f0 kernel/softirq.c:234
ksoftirqd_run_end kernel/softirq.c:325 [inline]
run_ksoftirqd+0x74/0x180 kernel/softirq.c:1081
smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245