Extracting prog: 1m15.947400877s
Minimizing prog: 54.606102257s
Simplifying prog options: 0s
Extracting C: 46.934036456s
Simplifying C: 5m55.925802397s
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$ext4-mount$incfs
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f00000002c0)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x800700, &(0x7f0000000680)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@max_dir_size_kb={'max_dir_size_kb', 0x3d, 0x9e14}}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x1000000}}, {@nomblk_io_submit}, {@discard}, {@jqfmt_vfsold}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x400}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000140)='./file0\x00', &(0x7f0000000280), 0x404, 0x0)
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f00000002c0)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x800700, &(0x7f0000000680)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@max_dir_size_kb={'max_dir_size_kb', 0x3d, 0x9e14}}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x1000000}}, {@nomblk_io_submit}, {@discard}, {@jqfmt_vfsold}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x400}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
extracting C reproducer
testing compiled C 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$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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$ext4
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program did not crash
testing compiled C program (duration=30s, {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$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
testing compiled C program (duration=30s, {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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program did not crash
testing program (duration=30s, {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$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f00000002c0)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x800700, &(0x7f0000000680)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@max_dir_size_kb={'max_dir_size_kb', 0x3d, 0x9e14}}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x1000000}}, {@nomblk_io_submit}, {@discard}, {@jqfmt_vfsold}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x400}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f00000002c0)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x800700, &(0x7f0000000680)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@max_dir_size_kb={'max_dir_size_kb', 0x3d, 0x9e14}}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x1000000}}, {@nomblk_io_submit}, {@discard}, {@jqfmt_vfsold}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x400}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
testing program (duration=30s, {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$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f00000002c0)='ext4\x00', &(0x7f00000001c0)='./file0\x00', 0x800700, &(0x7f0000000680)={[{@block_validity}, {@nouser_xattr}, {@nogrpid}, {@oldalloc}, {@max_dir_size_kb={'max_dir_size_kb', 0x3d, 0x9e14}}, {@inode_readahead_blks={'inode_readahead_blks', 0x3d, 0x1000000}}, {@nomblk_io_submit}, {@discard}, {@jqfmt_vfsold}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x400}}], [{@seclabel}]}, 0x2, 0x460, &(0x7f00000008c0)="$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")
program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra
validation run: crashed=true
reproducing took 11m4.246321785s
repro crashed as (corrupted=false):
I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
==================================================================
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/395
CPU: 0 PID: 395 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: 0033:0x7f09dd4a7407
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:00007ffe60a77170 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f09ddbf0880 RCX: 00007f09dd4a7407
RDX: 0000000000000200 RSI: 00007f09ddbef000 RDI: 0000000000000009
RBP: 0000563064fc6790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000563064fe18a8 R15: 00007f09ddd1739c
==================================================================
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: 395 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 dc 1c 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 d1 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 b9 ba
RSP: 0018:ffffc900015f7878 EFLAGS: 00010246
RAX: ffff888117dcbc00 RBX: 0000000000000000 RCX: ffff888117dcbcc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015f78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 000000000000003f R14: 0000000000000000 R15: ffff888100488d50
FS: 00007f09ddbf0880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 00000001288af000 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: 0033:0x7f09dd4a7407
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:00007ffe60a77170 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f09ddbf0880 RCX: 00007f09dd4a7407
RDX: 0000000000000200 RSI: 00007f09ddbef000 RDI: 0000000000000009
RBP: 0000563064fc6790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000563064fe18a8 R15: 00007f09ddd1739c
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 dc 1c 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 d1 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 b9 ba
RSP: 0018:ffffc900015f7878 EFLAGS: 00010246
RAX: ffff888117dcbc00 RBX: 0000000000000000 RCX: ffff888117dcbcc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015f78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 000000000000003f R14: 0000000000000000 R15: ffff888100488d50
FS: 00007f09ddbf0880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 00000001288af000 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 dc 1c d2 ff call 0xffd21ce9
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 d1 ba 17 00 call 0x17baf9
* 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: b9 .byte 0xb9
3d: ba .byte 0xba
final repro crashed as (corrupted=false):
I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
==================================================================
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/395
CPU: 0 PID: 395 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: 0033:0x7f09dd4a7407
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:00007ffe60a77170 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f09ddbf0880 RCX: 00007f09dd4a7407
RDX: 0000000000000200 RSI: 00007f09ddbef000 RDI: 0000000000000009
RBP: 0000563064fc6790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000563064fe18a8 R15: 00007f09ddd1739c
==================================================================
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: 395 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 dc 1c 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 d1 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 b9 ba
RSP: 0018:ffffc900015f7878 EFLAGS: 00010246
RAX: ffff888117dcbc00 RBX: 0000000000000000 RCX: ffff888117dcbcc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015f78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 000000000000003f R14: 0000000000000000 R15: ffff888100488d50
FS: 00007f09ddbf0880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 00000001288af000 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: 0033:0x7f09dd4a7407
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:00007ffe60a77170 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f09ddbf0880 RCX: 00007f09dd4a7407
RDX: 0000000000000200 RSI: 00007f09ddbef000 RDI: 0000000000000009
RBP: 0000563064fc6790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000563064fe18a8 R15: 00007f09ddd1739c
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 dc 1c 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 d1 ba 17 00 41 80 4c 24 03 10 4c 89 e7 48 83 c7 34 be 04 00 00 00 e8 b9 ba
RSP: 0018:ffffc900015f7878 EFLAGS: 00010246
RAX: ffff888117dcbc00 RBX: 0000000000000000 RCX: ffff888117dcbcc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015f78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000
R13: 000000000000003f R14: 0000000000000000 R15: ffff888100488d50
FS: 00007f09ddbf0880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 00000001288af000 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 dc 1c d2 ff call 0xffd21ce9
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 d1 ba 17 00 call 0x17baf9
* 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: b9 .byte 0xb9
3d: ba .byte 0xba