Extracting prog: 1m20.829735042s Minimizing prog: 52.58µs Simplifying prog options: 0s Extracting C: 23.048335793s Simplifying C: 12m25.242771891s 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$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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") program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra single: successfully extracted reproducer found reproducer with 1 syscalls minimizing guilty program extracting C reproducer testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$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$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program 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:false 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$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false 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$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false 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$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false 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', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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") program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra validation run: crashed=true testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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") program did not crash validation run: crashed=false testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false 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', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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") program did not crash validation run: crashed=false testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000180)='ext4\x00', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false 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', &(0x7f0000000000)='./file1\x00', 0x0, &(0x7f0000000b40)={[{@data_err_ignore}, {@dioread_nolock}, {@resuid}, {@prjquota}, {@noacl}, {@block_validity}, {@min_batch_time}]}, 0x1, 0x47a, &(0x7f00000001c0)="$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") program crashed: KASAN: null-ptr-deref Write in do_page_cache_ra validation run: crashed=true reproducing took 18m1.619161299s 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/376 CPU: 1 PID: 376 Comm: udevd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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: 0033:0x7fafaaea7407 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:00007ffd8c5253b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fafab577880 RCX: 00007fafaaea7407 RDX: 0000000000000200 RSI: 00007fafab53e000 RDI: 0000000000000009 RBP: 0000565047fea790 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000565047db2418 R15: 00007fafab69e39c ================================================================== 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: 376 Comm: udevd Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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:ffffc900009a7878 EFLAGS: 00010246 RAX: ffff888112bc5100 RBX: 0000000000000000 RCX: ffff888112bc5100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000 R13: 000000000000003f R14: 0000000000000000 R15: ffff88810048e750 FS: 00007fafab577880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 0000000111fa9000 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: 0033:0x7fafaaea7407 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:00007ffd8c5253b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fafab577880 RCX: 00007fafaaea7407 RDX: 0000000000000200 RSI: 00007fafab53e000 RDI: 0000000000000009 RBP: 0000565047fea790 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000565047db2418 R15: 00007fafab69e39c 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:ffffc900009a7878 EFLAGS: 00010246 RAX: ffff888112bc5100 RBX: 0000000000000000 RCX: ffff888112bc5100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000 R13: 000000000000003f R14: 0000000000000000 R15: ffff88810048e750 FS: 00007fafab577880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 0000000111fa9000 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): 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/376 CPU: 1 PID: 376 Comm: udevd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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: 0033:0x7fafaaea7407 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:00007ffd8c5253b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fafab577880 RCX: 00007fafaaea7407 RDX: 0000000000000200 RSI: 00007fafab53e000 RDI: 0000000000000009 RBP: 0000565047fea790 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000565047db2418 R15: 00007fafab69e39c ================================================================== 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: 376 Comm: udevd Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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:ffffc900009a7878 EFLAGS: 00010246 RAX: ffff888112bc5100 RBX: 0000000000000000 RCX: ffff888112bc5100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000 R13: 000000000000003f R14: 0000000000000000 R15: ffff88810048e750 FS: 00007fafab577880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 0000000111fa9000 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: 0033:0x7fafaaea7407 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:00007ffd8c5253b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fafab577880 RCX: 00007fafaaea7407 RDX: 0000000000000200 RSI: 00007fafab53e000 RDI: 0000000000000009 RBP: 0000565047fea790 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000565047db2418 R15: 00007fafab69e39c 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:ffffc900009a7878 EFLAGS: 00010246 RAX: ffff888112bc5100 RBX: 0000000000000000 RCX: ffff888112bc5100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a78c8 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: 0000000000000000 R13: 000000000000003f R14: 0000000000000000 R15: ffff88810048e750 FS: 00007fafab577880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 0000000111fa9000 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