INFO: task syz-executor:5811 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22360 pid:5811 tgid:5811 ppid:5810 task_flags:0x440100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7005
io_schedule+0x8a/0xf0 kernel/sched/core.c:7832
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
wp_page_shared mm/memory.c:3990 [inline]
do_wp_page+0x4aa/0x4f00 mm/memory.c:4209
handle_pte_fault mm/memory.c:6332 [inline]
__handle_mm_fault+0x1ac8/0x2b60 mm/memory.c:6454
handle_mm_fault+0x36d/0xa20 mm/memory.c:6623
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f8fd2e6e903
RSP: 002b:00007fff0db4a5a0 EFLAGS: 00010206
RAX: 00007f8fcdbdf1f0 RBX: 00007fff0db4a6d0 RCX: 0000000000000000
RDX: 00007f8fcdbdf1ec RSI: 0000000000000008 RDI: 00007fff0db4a6d0
RBP: 00000000000003e6 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fff0db4a6b0 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000020e10 R14: fffffffffffdf1f0 R15: 0000000000000000
INFO: task syz.0.3818:24645 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3818 state:D stack:26536 pid:24645 tgid:24645 ppid:17933 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7005
io_schedule+0x8a/0xf0 kernel/sched/core.c:7832
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5874 [inline]
do_fault+0x3d7/0x1950 mm/memory.c:5936
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6316 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6454
handle_mm_fault+0x36d/0xa20 mm/memory.c:6623
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f82cbc71632
RSP: 002b:00007fff8bf9c080 EFLAGS: 00010202
RAX: 000000000005b008 RBX: 00007f82ccb45720 RCX: 0000000000000000
RDX: 0000001b2dbc9000 RSI: 0000000000000008 RDI: 00007f82ccb45720
RBP: 0000000000000c00 R08: 00007f82cc000000 R09: 00007f82cc0163f8
R10: 0000000000000007 R11: 0000000000000014 R12: ffffffff8b8589a2
R13: 00007f82cc0163f8 R14: 00000000000001fd R15: fffffffffffa5000
INFO: task syz.3.3831:24702 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3831 state:D stack:26536 pid:24702 tgid:24702 ppid:17071 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7005
io_schedule+0x8a/0xf0 kernel/sched/core.c:7832
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5874 [inline]
do_fault+0x3d7/0x1950 mm/memory.c:5936
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6316 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6454
handle_mm_fault+0x36d/0xa20 mm/memory.c:6623
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f4459070ec0
RSP: 002b:00007fff3f562030 EFLAGS: 00010202
RAX: 0000001b2f2ef000 RBX: ffffffff828c25eb RCX: 0000001b2f2eeff8
RDX: 0000001b2ed24220 RSI: 0000000000000008 RDI: 00007f4459f45720
RBP: 0000000000000117 R08: 00007f4459400000 R09: 00007f4459402000
R10: 00000000828c25ef R11: 0000000000000016 R12: 00007f4459416308
R13: 0000000000000142 R14: ffffffff828c2549 R15: 00007f4459f45720
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
3 locks held by syz-executor/5811:
#0: ffff888073860bc8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff88803604e518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff88803604a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
3 locks held by syz.0.3818/24645:
#0: ffff88802336de48 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff88803604e518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff88803604a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
3 locks held by syz.3.3831/24702:
#0: ffff88802f0116c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff88803604e518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff88803604a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xd25/0x1050 kernel/hung_task.c:515
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 0 Comm: swapper/1 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 68 85 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 3e 1e 00 fb f4 fc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df0 EFLAGS: 00000246
RAX: 0000000000a984c5 RBX: ffff88801e6e8000 RCX: ffffffff8b8d4c75
RDX: 0000000000000000 RSI: ffffffff8de7b8e8 RDI: ffffffff8c1af520
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed10170a6795
R10: ffff8880b8533cab R11: 0000000000000000 R12: ffffed1003cdd000
R13: 0000000000000001 R14: ffffffff90d9b010 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88812444c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005630a0af8000 CR3: 000000000e598000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x35b/0x4b0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148