ci2-android-5-10/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-10/syz-executor505689639 <...> Warning: Permanently added '10.128.0.22' (ED25519) to the list of known hosts. execve("ci2-android-5-10/syz-executor505689639", ["ci2-android-5-10/syz-executor505689639"], 0x7fff61b404a0 /* 10 vars */) = 0 brk(NULL) = 0x5555795a2000 brk(0x5555795a2d40) = 0x5555795a2d40 arch_prctl(ARCH_SET_FS, 0x5555795a23c0) = 0 set_tid_address(0x5555795a2690) = 297 set_robust_list(0x5555795a26a0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 32, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-android-5-10/syz-executor505689639", 4096) = 44 getrandom("\x5e\xdd\xfa\x85\x2c\x83\x8d\x38", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555795a2d40 brk(0x5555795c3d40) = 0x5555795c3d40 brk(0x5555795c4000) = 0x5555795c4000 mprotect(0x7f3b0892d000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 getrandom("\x36\xc1\x02\x77\x58\xc7\xbe\x8c", 8, GRND_NONBLOCK) = 8 mkdir("./syzkaller.8Vw8oW", 0700) = 0 chmod("./syzkaller.8Vw8oW", 0777) = 0 chdir("./syzkaller.8Vw8oW") = 0 unshare(CLONE_NEWPID) = 0 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555795a2690) = 298 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ci2-android-5-10/strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x5555795a26a0, 24) = 0 [pid 298] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 298] getppid() = 0 [pid 298] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 298] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 298] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 298] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 298] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 298] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 298] unshare(CLONE_NEWNS) = 0 [pid 298] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 298] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 298] unshare(CLONE_NEWCGROUP) = 0 [pid 298] unshare(CLONE_NEWUTS) = 0 [pid 298] unshare(CLONE_SYSVSEM) = 0 [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 298] getpid() = 1 [pid 298] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b eb 86 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5e ff ff ff 4c [ 23.943010][ T298] RSP: 0018:ffffc90000b37c10 EFLAGS: 00010293 [ 23.949108][ T298] RAX: ffffffff81ad4045 RBX: ffff88811c6819c0 RCX: ffff88810afe5000 [ 23.957109][ T298] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.965145][ T298] RBP: ffffc90000b37c38 R08: 0000000000000003 R09: 0000000000000004 [ 23.973204][ T298] R10: dffffc0000000000 R11: fffff52000166f70 R12: dffffc0000000000 [ 23.981338][ T298] R13: 1ffff110238d0341 R14: ffff88811c681a08 R15: 0000000000000000 [ 23.989359][ T298] FS: 00005555795a23c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 23.999034][ T298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.005652][ T298] CR2: 000055fa1d1ba758 CR3: 000000011e3f7000 CR4: 00000000003506a0 [ 24.013716][ T298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.021801][ T298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.030123][ T298] Call Trace: [ 24.033429][ T298] shmem_rmdir+0x5b/0x90 [ 24.037850][ T298] vfs_rmdir+0x1ab/0x3c0 [ 24.042231][ T298] incfs_kill_sb+0xf7/0x200 [ 24.047400][ T298] deactivate_locked_super+0xa0/0x100 [ 24.053113][ T298] deactivate_super+0xaf/0xe0 [ 24.057995][ T298] cleanup_mnt+0x44f/0x500 [ 24.062425][ T298] __cleanup_mnt+0x19/0x20 [ 24.067052][ T298] task_work_run+0x127/0x190 [ 24.071744][ T298] ptrace_notify+0x230/0x270 [ 24.076585][ T298] ? do_notify_parent+0x810/0x810 [ 24.082178][ T298] ? user_path_at_empty+0x43/0x50 [ 24.087574][ T298] ? __x64_sys_umount+0x12d/0x170 [ 24.092805][ T298] ? path_umount+0xfa0/0xfa0 [ 24.097441][ T298] syscall_exit_work+0x6e/0x140 [ 24.102310][ T298] syscall_exit_to_user_mode+0x2f/0x40 [ 24.107873][ T298] do_syscall_64+0x3d/0x40 [ 24.112402][ T298] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.118890][ T298] RIP: 0033:0x7f3b0889a527 [ 24.123310][ T298] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8 [ 24.143762][ T298] RSP: 002b:00007ffeee803558 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 24.152698][ T298] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3b0889a527 [ 24.160993][ T298] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeee803610 [ 24.169454][ T298] RBP: 00007ffeee803610 R08: 00007ffeee804610 R09: 00000000ffffffff [ 24.178131][ T298] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffeee804680 [ 24.186419][ T298] R13: 00005555795a3720 R14: 00007ffeee804680 R15: 0000000000000001 [ 24.194683][ T298] ---[ end trace 47d5aff5c728a4a3 ]--- [ 24.200173][ T298] ================================================================== [ 24.208311][ T298] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 [ 24.214526][ T298] Write of size 4 at addr 0000000000000170 by task syz-executor505/298 [ 24.222749][ T298] [ 24.225125][ T298] CPU: 1 PID: 298 Comm: syz-executor505 Tainted: G W syzkaller #0 [ 24.234313][ T298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 24.244472][ T298] Call Trace: [ 24.247758][ T298] __dump_stack+0x21/0x24 [ 24.252098][ T298] dump_stack_lvl+0x1a7/0x208 [ 24.256962][ T298] ? thaw_kernel_threads+0x220/0x220 [ 24.262504][ T298] ? show_regs_print_info+0x18/0x18 [ 24.267827][ T298] ? _raw_spin_lock+0x94/0xf0 [ 24.272726][ T298] ? _raw_spin_trylock_bh+0x150/0x150 [ 24.278197][ T298] ? ihold+0x20/0x60 [ 24.282177][ T298] kasan_report+0xbd/0x140 [ 24.286666][ T298] ? ihold+0x20/0x60 [ 24.290564][ T298] kasan_check_range+0x249/0x2a0 [ 24.295661][ T298] __kasan_check_write+0x14/0x20 [ 24.300782][ T298] ihold+0x20/0x60 [ 24.304666][ T298] vfs_rmdir+0x2d5/0x3c0 [ 24.308896][ T298] incfs_kill_sb+0xf7/0x200 [ 24.313484][ T298] deactivate_locked_super+0xa0/0x100 [ 24.319014][ T298] deactivate_super+0xaf/0xe0 [ 24.323674][ T298] cleanup_mnt+0x44f/0x500 [ 24.328072][ T298] __cleanup_mnt+0x19/0x20 [ 24.332485][ T298] task_work_run+0x127/0x190 [ 24.337059][ T298] ptrace_notify+0x230/0x270 [ 24.341719][ T298] ? do_notify_parent+0x810/0x810 [ 24.346751][ T298] ? user_path_at_empty+0x43/0x50 [ 24.352056][ T298] ? __x64_sys_umount+0x12d/0x170 [ 24.357077][ T298] ? path_umount+0xfa0/0xfa0 [ 24.361730][ T298] syscall_exit_work+0x6e/0x140 [ 24.366571][ T298] syscall_exit_to_user_mode+0x2f/0x40 [ 24.372458][ T298] do_syscall_64+0x3d/0x40 [ 24.377162][ T298] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.383050][ T298] RIP: 0033:0x7f3b0889a527 [ 24.387494][ T298] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8 [ 24.407262][ T298] RSP: 002b:00007ffeee803558 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 24.415748][ T298] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3b0889a527 [ 24.424090][ T298] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeee803610 [ 24.432422][ T298] RBP: 00007ffeee803610 R08: 00007ffeee804610 R09: 00000000ffffffff [ 24.440378][ T298] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffeee804680 [ 24.448348][ T298] R13: 00005555795a3720 R14: 00007ffeee804680 R15: 0000000000000001 [ 24.456302][ T298] ================================================================== [ 24.464433][ T298] Disabling lock debugging due to kernel taint [ 24.470717][ T298] BUG: kernel NULL pointer dereference, address: 0000000000000170 [ 24.478550][ T298] #PF: supervisor write access in kernel mode [ 24.484783][ T298] #PF: error_code(0x0002) - not-present page [ 24.490759][ T298] PGD 0 P4D 0 [ 24.494214][ T298] Oops: 0002 [#1] PREEMPT SMP KASAN [ 24.499479][ T298] CPU: 1 PID: 298 Comm: syz-executor505 Tainted: G B W syzkaller #0 [ 24.508730][ T298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 24.518894][ T298] RIP: 0010:ihold+0x26/0x60 [ 24.523391][ T298] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 81 6c b7 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 40 ef f1 ff 41 be 01 00 00 00 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 01 [ 24.544164][ T298] RSP: 0018:ffffc90000b37c50 EFLAGS: 00010246 [ 24.550403][ T298] RAX: ffff88810afe5000 RBX: 0000000000000000 RCX: ffff88810afe5000 [ 24.558373][ T298] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff [ 24.566443][ T298] RBP: ffffc90000b37c60 R08: 0000000000000003 R09: 0000000000000004 [ 24.574508][ T298] R10: dffffc0000000000 R11: fffffbfff0dcf848 R12: dffffc0000000000 [ 24.582916][ T298] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 24.591340][ T298] FS: 00005555795a23c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 24.600469][ T298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.608117][ T298] CR2: 0000000000000170 CR3: 000000011e3f7000 CR4: 00000000003506a0 [ 24.616365][ T298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.624906][ T298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.634114][ T298] Call Trace: [ 24.637424][ T298] vfs_rmdir+0x2d5/0x3c0 [ 24.641762][ T298] incfs_kill_sb+0xf7/0x200 [ 24.646359][ T298] deactivate_locked_super+0xa0/0x100 [ 24.651916][ T298] deactivate_super+0xaf/0xe0 [ 24.656693][ T298] cleanup_mnt+0x44f/0x500 [ 24.661103][ T298] __cleanup_mnt+0x19/0x20 [ 24.665514][ T298] task_work_run+0x127/0x190 [ 24.670284][ T298] ptrace_notify+0x230/0x270 [ 24.674867][ T298] ? do_notify_parent+0x810/0x810 [ 24.679975][ T298] ? user_path_at_empty+0x43/0x50 [ 24.685253][ T298] ? __x64_sys_umount+0x12d/0x170 [ 24.690269][ T298] ? path_umount+0xfa0/0xfa0 [ 24.694855][ T298] syscall_exit_work+0x6e/0x140 [ 24.699787][ T298] syscall_exit_to_user_mode+0x2f/0x40 [ 24.705465][ T298] do_syscall_64+0x3d/0x40 [ 24.709991][ T298] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.716332][ T298] RIP: 0033:0x7f3b0889a527 [ 24.720963][ T298] Code: bf 41 4d 56 53 b8 9d 00 00 00 0f 05 83 f8 ea 75 a2 c7 05 64 85 09 00 00 00 00 00 eb 96 e8 b1 05 00 00 90 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8 [ 24.740890][ T298] RSP: 002b:00007ffeee803558 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 24.749675][ T298] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3b0889a527 [ 24.757739][ T298] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeee803610 [ 24.765848][ T298] RBP: 00007ffeee803610 R08: 00007ffeee804610 R09: 00000000ffffffff [ 24.774002][ T298] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffeee804680 [ 24.782166][ T298] R13: 00005555795a3720 R14: 00007ffeee804680 R15: 0000000000000001 [ 24.790333][ T298] Modules linked in: [ 24.794238][ T298] CR2: 0000000000000170 [ 24.798388][ T298] ---[ end trace 47d5aff5c728a4a4 ]--- [ 24.803850][ T298] RIP: 0010:ihold+0x26/0x60 [ 24.808519][ T298] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 81 6c b7 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 40 ef f1 ff 41 be 01 00 00 00 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 01 [ 24.828926][ T298] RSP: 0018:ffffc90000b37c50 EFLAGS: 00010246 [ 24.835000][ T298] RAX: ffff88810afe5000 RBX: 0000000000000000 RCX: ffff88810afe5000 [ 24.842983][ T298] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff [ 24.851388][ T298] RBP: ffffc90000b37c60 R08: 0000000000000003 R09: 0000000000000004 [ 24.859649][ T298] R10: dffffc0000000000 R11: fffffbfff0dcf848 R12: dffffc0000000000 [ 24.867878][ T298] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 24.876673][ T298] FS: 00005555795a23c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 24.885689][ T298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.892362][ T298] CR2: 0000000000000170 CR3: 000000011e3f7000 CR4: 00000000003506a0 [ 24.900418][ T298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.908381][ T298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.916451][ T298] Kernel panic - not syncing: Fatal exception [ 24.922573][ T298] Kernel Offset: disabled [ 24.926890][ T298] Rebooting in 86400 seconds..