Extracting prog: 3m21.04525491s
Minimizing prog: 3m17.592578933s
Simplifying prog options: 0s
Extracting C: 1m17.611609939s
Simplifying C: 11m2.352852272s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-setxattr$trusted_overlay_upper-truncate
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
setxattr$trusted_overlay_upper(&(0x7f0000000380)='./file1\x00', &(0x7f00000001c0), &(0x7f0000001400)=ANY=[], 0x835, 0x1)
truncate(&(0x7f0000000080)='./file1\x00', 0x0)
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-setxattr$trusted_overlay_upper-truncate
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
setxattr$trusted_overlay_upper(&(0x7f0000000380)='./file1\x00', &(0x7f00000001c0), &(0x7f0000001400)=ANY=[], 0x835, 0x1)
truncate(&(0x7f0000000080)='./file1\x00', 0x0)
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=3m51.365335054s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-setxattr$trusted_overlay_upper
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
setxattr$trusted_overlay_upper(&(0x7f0000000380)='./file1\x00', &(0x7f00000001c0), &(0x7f0000001400)=ANY=[], 0x835, 0x1)
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing program (duration=3m51.365335054s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
extracting C reproducer
testing compiled C program (duration=3m51.365335054s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
simplifying C reproducer
testing compiled C program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=3m51.365335054s, {Threaded:false 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program did not crash
testing compiled C program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program did not crash
testing compiled C program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
testing program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
testing program (duration=3m51.365335054s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f00000001c0)='./file2\x00', 0x404, &(0x7f0000000580)={[{@max_batch_time={'max_batch_time', 0x3d, 0x20}}, {@max_batch_time={'max_batch_time', 0x3d, 0x2}}, {@debug_want_extra_isize={'debug_want_extra_isize', 0x3d, 0x6a}}, {@mb_optimize_scan={'mb_optimize_scan', 0x3d, 0x1}}, {@errors_remount}, {@nombcache}]}, 0x1, 0x437, &(0x7f0000000900)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
reproducing took 22m30.154562133s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:87 [inline]
BUG: KASAN: null-ptr-deref in set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
BUG: KASAN: null-ptr-deref in do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Write of size 8 at addr 0000000000000000 by task udevd/397
CPU: 0 PID: 397 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_report+0x3d/0x60 mm/kasan/report.c:423
kasan_report+0x122/0x150 mm/kasan/report.c:524
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
instrument_atomic_write include/linux/instrumented.h:87 [inline]
set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
force_page_cache_ra mm/readahead.c:360 [inline]
page_cache_sync_ra+0x32b/0x3d0 mm/readahead.c:751
page_cache_sync_readahead include/linux/pagemap.h:1259 [inline]
filemap_get_pages mm/filemap.c:2706 [inline]
filemap_read+0x6b6/0x23c0 mm/filemap.c:2801
blkdev_read_iter+0x439/0x580 block/fops.c:668
call_read_iter include/linux/fs.h:2276 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x46e/0x930 fs/read_write.c:470
ksys_read+0x14a/0x260 fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:621
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f249c4a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffec574e460 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f249cb55880 RCX: 00007f249c4a7407
RDX: 0000000000000200 RSI: 00007f249c278000 RDI: 0000000000000009
RBP: 000056429de0f790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000001f6
R13: 000000000000fe00 R14: 000056429de11e38 R15: 00007f249cc7c39c
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000003
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 397 Comm: udevd Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:arch_set_bit include/linux/instrumented.h:87 [inline]
RIP: 0010:set_bit include/asm-generic/bitops/instrumented-atomic.h:29 [inline]
RIP: 0010:do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Code: fd ff 48 3d 01 f0 ff ff 72 10 e8 7c 1e d2 ff 49 83 ee 01 73 78 e9 87 00 00 00 49 89 c4 48 89 c7 be 08 00 00 00 e8 11 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 f9 b9
RSP: 0018:ffffc90000ab7878 EFLAGS: 00010246
RAX: ffff8881325b0000 RBX: 000000000000000f RCX: ffff8881325b0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ab78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 0000000000000030 R14: 0000000000000000 R15: ffff88810b6c50d0
FS: 00007f249cb55880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 0000000110658000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
force_page_cache_ra mm/readahead.c:360 [inline]
page_cache_sync_ra+0x32b/0x3d0 mm/readahead.c:751
page_cache_sync_readahead include/linux/pagemap.h:1259 [inline]
filemap_get_pages mm/filemap.c:2706 [inline]
filemap_read+0x6b6/0x23c0 mm/filemap.c:2801
blkdev_read_iter+0x439/0x580 block/fops.c:668
call_read_iter include/linux/fs.h:2276 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x46e/0x930 fs/read_write.c:470
ksys_read+0x14a/0x260 fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:621
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f249c4a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffec574e460 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f249cb55880 RCX: 00007f249c4a7407
RDX: 0000000000000200 RSI: 00007f249c278000 RDI: 0000000000000009
RBP: 000056429de0f790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000001f6
R13: 000000000000fe00 R14: 000056429de11e38 R15: 00007f249cc7c39c
Modules linked in:
CR2: 0000000000000003
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_set_bit include/linux/instrumented.h:87 [inline]
RIP: 0010:set_bit include/asm-generic/bitops/instrumented-atomic.h:29 [inline]
RIP: 0010:do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Code: fd ff 48 3d 01 f0 ff ff 72 10 e8 7c 1e d2 ff 49 83 ee 01 73 78 e9 87 00 00 00 49 89 c4 48 89 c7 be 08 00 00 00 e8 11 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 f9 b9
RSP: 0018:ffffc90000ab7878 EFLAGS: 00010246
RAX: ffff8881325b0000 RBX: 000000000000000f RCX: ffff8881325b0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ab78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 0000000000000030 R14: 0000000000000000 R15: ffff88810b6c50d0
FS: 00007f249cb55880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 0000000110658000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 72 10 jb 0x18
8: e8 7c 1e d2 ff call 0xffd21e89
d: 49 83 ee 01 sub $0x1,%r14
11: 73 78 jae 0x8b
13: e9 87 00 00 00 jmp 0x9f
18: 49 89 c4 mov %rax,%r12
1b: 48 89 c7 mov %rax,%rdi
1e: be 08 00 00 00 mov $0x8,%esi
23: e8 11 ba 17 00 call 0x17ba39
* 28: f0 41 80 4c 24 03 10 lock orb $0x10,0x3(%r12) <-- trapping instruction
2f: 4c 89 e7 mov %r12,%rdi
32: 48 83 c7 34 add $0x34,%rdi
36: be 04 00 00 00 mov $0x4,%esi
3b: e8 .byte 0xe8
3c: f9 stc
3d: b9 .byte 0xb9
final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:87 [inline]
BUG: KASAN: null-ptr-deref in set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
BUG: KASAN: null-ptr-deref in do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Write of size 8 at addr 0000000000000000 by task udevd/397
CPU: 0 PID: 397 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_report+0x3d/0x60 mm/kasan/report.c:423
kasan_report+0x122/0x150 mm/kasan/report.c:524
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
instrument_atomic_write include/linux/instrumented.h:87 [inline]
set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
force_page_cache_ra mm/readahead.c:360 [inline]
page_cache_sync_ra+0x32b/0x3d0 mm/readahead.c:751
page_cache_sync_readahead include/linux/pagemap.h:1259 [inline]
filemap_get_pages mm/filemap.c:2706 [inline]
filemap_read+0x6b6/0x23c0 mm/filemap.c:2801
blkdev_read_iter+0x439/0x580 block/fops.c:668
call_read_iter include/linux/fs.h:2276 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x46e/0x930 fs/read_write.c:470
ksys_read+0x14a/0x260 fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:621
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f249c4a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffec574e460 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f249cb55880 RCX: 00007f249c4a7407
RDX: 0000000000000200 RSI: 00007f249c278000 RDI: 0000000000000009
RBP: 000056429de0f790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000001f6
R13: 000000000000fe00 R14: 000056429de11e38 R15: 00007f249cc7c39c
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000003
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 397 Comm: udevd Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:arch_set_bit include/linux/instrumented.h:87 [inline]
RIP: 0010:set_bit include/asm-generic/bitops/instrumented-atomic.h:29 [inline]
RIP: 0010:do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Code: fd ff 48 3d 01 f0 ff ff 72 10 e8 7c 1e d2 ff 49 83 ee 01 73 78 e9 87 00 00 00 49 89 c4 48 89 c7 be 08 00 00 00 e8 11 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 f9 b9
RSP: 0018:ffffc90000ab7878 EFLAGS: 00010246
RAX: ffff8881325b0000 RBX: 000000000000000f RCX: ffff8881325b0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ab78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 0000000000000030 R14: 0000000000000000 R15: ffff88810b6c50d0
FS: 00007f249cb55880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 0000000110658000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
force_page_cache_ra mm/readahead.c:360 [inline]
page_cache_sync_ra+0x32b/0x3d0 mm/readahead.c:751
page_cache_sync_readahead include/linux/pagemap.h:1259 [inline]
filemap_get_pages mm/filemap.c:2706 [inline]
filemap_read+0x6b6/0x23c0 mm/filemap.c:2801
blkdev_read_iter+0x439/0x580 block/fops.c:668
call_read_iter include/linux/fs.h:2276 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x46e/0x930 fs/read_write.c:470
ksys_read+0x14a/0x260 fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:621
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f249c4a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffec574e460 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f249cb55880 RCX: 00007f249c4a7407
RDX: 0000000000000200 RSI: 00007f249c278000 RDI: 0000000000000009
RBP: 000056429de0f790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000001f6
R13: 000000000000fe00 R14: 000056429de11e38 R15: 00007f249cc7c39c
Modules linked in:
CR2: 0000000000000003
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_set_bit include/linux/instrumented.h:87 [inline]
RIP: 0010:set_bit include/asm-generic/bitops/instrumented-atomic.h:29 [inline]
RIP: 0010:do_page_cache_ra+0x18f/0x230 mm/readahead.c:324
Code: fd ff 48 3d 01 f0 ff ff 72 10 e8 7c 1e d2 ff 49 83 ee 01 73 78 e9 87 00 00 00 49 89 c4 48 89 c7 be 08 00 00 00 e8 11 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 f9 b9
RSP: 0018:ffffc90000ab7878 EFLAGS: 00010246
RAX: ffff8881325b0000 RBX: 000000000000000f RCX: ffff8881325b0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ab78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 0000000000000030 R14: 0000000000000000 R15: ffff88810b6c50d0
FS: 00007f249cb55880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 0000000110658000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 72 10 jb 0x18
8: e8 7c 1e d2 ff call 0xffd21e89
d: 49 83 ee 01 sub $0x1,%r14
11: 73 78 jae 0x8b
13: e9 87 00 00 00 jmp 0x9f
18: 49 89 c4 mov %rax,%r12
1b: 48 89 c7 mov %rax,%rdi
1e: be 08 00 00 00 mov $0x8,%esi
23: e8 11 ba 17 00 call 0x17ba39
* 28: f0 41 80 4c 24 03 10 lock orb $0x10,0x3(%r12) <-- trapping instruction
2f: 4c 89 e7 mov %r12,%rdi
32: 48 83 c7 34 add $0x34,%rdi
36: be 04 00 00 00 mov $0x4,%esi
3b: e8 .byte 0xe8
3c: f9 stc
3d: b9 .byte 0xb9