./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2837955912 <...> Warning: Permanently added '10.128.1.16' (ED25519) to the list of known hosts. execve("./syz-executor2837955912", ["./syz-executor2837955912"], 0x7fff5abdf640 /* 10 vars */) = 0 brk(NULL) = 0x555590822000 brk(0x555590822d00) = 0x555590822d00 arch_prctl(ARCH_SET_FS, 0x555590822380) = 0 set_tid_address(0x555590822650) = 282 set_robust_list(0x555590822660, 24) = 0 rseq(0x555590822ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2837955912", 4096) = 28 getrandom("\x29\x8b\x66\xee\x09\x90\xfb\x9f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555590822d00 brk(0x555590843d00) = 0x555590843d00 brk(0x555590844000) = 0x555590844000 mprotect(0x7f769922d000, 16384, 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 mkdir("./syzkaller.xlJpxr", 0700) = 0 chmod("./syzkaller.xlJpxr", 0777) = 0 chdir("./syzkaller.xlJpxr") = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555590822650) = 283 ./strace-static-x86_64: Process 283 attached [pid 283] set_robust_list(0x555590822660, 24) = 0 [pid 283] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 283] getppid() = 0 [pid 283] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 283] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 283] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 283] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 283] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 283] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 283] unshare(CLONE_NEWNS) = 0 [pid 283] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 283] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 283] unshare(CLONE_NEWCGROUP) = 0 [pid 283] unshare(CLONE_NEWUTS) = 0 [pid 283] unshare(CLONE_SYSVSEM) = 0 [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 283] getpid() = 1 [pid 283] 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 [ 37.131810][ T283] RSP: 0018:ffffc90000b37be8 EFLAGS: 00010293 [ 37.137932][ T283] RAX: ffffffff81ab60a5 RBX: ffff888120b24ee0 RCX: ffff88811d4e2780 [ 37.145939][ T283] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 37.153958][ T283] RBP: ffffc90000b37c10 R08: 0000000000000004 R09: 0000000000000003 [ 37.161939][ T283] R10: fffff52000166f6c R11: 1ffff92000166f6c R12: dffffc0000000000 [ 37.169950][ T283] R13: 1ffff110241649e5 R14: ffff888120b24f28 R15: 0000000000000000 [ 37.177959][ T283] FS: 0000555590822380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 37.186905][ T283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.193514][ T283] CR2: 000056212f99f748 CR3: 000000011df09000 CR4: 00000000003506a0 [ 37.201628][ T283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.209685][ T283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.217685][ T283] Call Trace: [ 37.220985][ T283] shmem_rmdir+0x5b/0x90 [ 37.225264][ T283] vfs_rmdir+0x1b3/0x3e0 [ 37.229528][ T283] incfs_kill_sb+0xfe/0x210 [ 37.234059][ T283] deactivate_locked_super+0xa0/0x100 [ 37.239436][ T283] deactivate_super+0xaf/0xe0 [ 37.244138][ T283] cleanup_mnt+0x446/0x500 [ 37.248553][ T283] __cleanup_mnt+0x19/0x20 [ 37.252949][ T283] task_work_run+0x127/0x190 [ 37.257570][ T283] ptrace_notify+0x212/0x250 [ 37.262155][ T283] ? do_notify_parent+0x7e0/0x7e0 [ 37.267201][ T283] ? user_path_at_empty+0x43/0x50 [ 37.272223][ T283] ? __x64_sys_umount+0x125/0x160 [ 37.277265][ T283] ? path_umount+0xf90/0xf90 [ 37.281853][ T283] syscall_exit_work+0x6e/0x140 [ 37.286757][ T283] syscall_exit_to_user_mode+0x5b/0x90 [ 37.292217][ T283] do_syscall_64+0x3d/0x40 [ 37.296679][ T283] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 37.302579][ T283] RIP: 0033:0x7f76991baac7 [ 37.307018][ T283] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 [ 37.326650][ T283] RSP: 002b:00007ffecfee6c68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 37.335077][ T283] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f76991baac7 [ 37.343069][ T283] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffecfee6d20 [ 37.351079][ T283] RBP: 00007ffecfee6d20 R08: 0000000000000000 R09: 0000000000000000 [ 37.359088][ T283] R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffecfee7d90 [ 37.367083][ T283] R13: 00005555908236c0 R14: 00007ffecfee7d90 R15: 0000000000000001 [ 37.375071][ T283] ---[ end trace 9e2adfe97b86adf9 ]--- [ 37.380561][ T283] ================================================================== [ 37.388611][ T283] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 [ 37.394854][ T283] Write of size 4 at addr 0000000000000170 by task syz-executor283/283 [ 37.403084][ T283] [ 37.405404][ T283] CPU: 1 PID: 283 Comm: syz-executor283 Tainted: G W 5.10.237-syzkaller-00010-gcf6ed0f1511d #0 [ 37.417002][ T283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 37.427037][ T283] Call Trace: [ 37.430309][ T283] __dump_stack+0x21/0x24 [ 37.434618][ T283] dump_stack_lvl+0x169/0x1d8 [ 37.439274][ T283] ? thaw_kernel_threads+0x220/0x220 [ 37.444541][ T283] ? show_regs_print_info+0x18/0x18 [ 37.449754][ T283] ? _raw_spin_lock+0x8e/0xe0 [ 37.454414][ T283] ? _raw_spin_trylock_bh+0x130/0x130 [ 37.459767][ T283] ? ihold+0x20/0x60 [ 37.463665][ T283] kasan_report+0xd8/0x130 [ 37.468063][ T283] ? ihold+0x20/0x60 [ 37.471939][ T283] kasan_check_range+0x280/0x290 [ 37.476857][ T283] __kasan_check_write+0x14/0x20 [ 37.481775][ T283] ihold+0x20/0x60 [ 37.485477][ T283] vfs_rmdir+0x247/0x3e0 [ 37.489725][ T283] incfs_kill_sb+0xfe/0x210 [ 37.494212][ T283] deactivate_locked_super+0xa0/0x100 [ 37.499568][ T283] deactivate_super+0xaf/0xe0 [ 37.504224][ T283] cleanup_mnt+0x446/0x500 [ 37.508622][ T283] __cleanup_mnt+0x19/0x20 [ 37.513023][ T283] task_work_run+0x127/0x190 [ 37.517596][ T283] ptrace_notify+0x212/0x250 [ 37.522171][ T283] ? do_notify_parent+0x7e0/0x7e0 [ 37.527179][ T283] ? user_path_at_empty+0x43/0x50 [ 37.532203][ T283] ? __x64_sys_umount+0x125/0x160 [ 37.537234][ T283] ? path_umount+0xf90/0xf90 [ 37.541810][ T283] syscall_exit_work+0x6e/0x140 [ 37.546641][ T283] syscall_exit_to_user_mode+0x5b/0x90 [ 37.552079][ T283] do_syscall_64+0x3d/0x40 [ 37.556498][ T283] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 37.562373][ T283] RIP: 0033:0x7f76991baac7 [ 37.566777][ T283] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 [ 37.586382][ T283] RSP: 002b:00007ffecfee6c68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 37.594799][ T283] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f76991baac7 [ 37.602754][ T283] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffecfee6d20 [ 37.610710][ T283] RBP: 00007ffecfee6d20 R08: 0000000000000000 R09: 0000000000000000 [ 37.618666][ T283] R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffecfee7d90 [ 37.626646][ T283] R13: 00005555908236c0 R14: 00007ffecfee7d90 R15: 0000000000000001 [ 37.634604][ T283] ================================================================== [ 37.642643][ T283] Disabling lock debugging due to kernel taint [ 37.648968][ T283] BUG: kernel NULL pointer dereference, address: 0000000000000170 [ 37.656773][ T283] #PF: supervisor write access in kernel mode [ 37.662824][ T283] #PF: error_code(0x0002) - not-present page [ 37.668788][ T283] PGD 0 P4D 0 [ 37.672162][ T283] Oops: 0002 [#1] PREEMPT SMP KASAN [ 37.677351][ T283] CPU: 1 PID: 283 Comm: syz-executor283 Tainted: G B W 5.10.237-syzkaller-00010-gcf6ed0f1511d #0 [ 37.688964][ T283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 37.699024][ T283] RIP: 0010:ihold+0x26/0x60 [ 37.703516][ T283] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 e1 29 b8 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 90 1b f2 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 61 [ 37.723115][ T283] RSP: 0018:ffffc90000b37c28 EFLAGS: 00010246 [ 37.729176][ T283] RAX: ffff88811d4e2700 RBX: 0000000000000000 RCX: 0000000000000286 [ 37.737140][ T283] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff [ 37.745112][ T283] RBP: ffffc90000b37c38 R08: 0000000000000004 R09: 0000000000000003 [ 37.753078][ T283] R10: fffffbfff0d8e248 R11: 1ffffffff0d8e248 R12: 1ffff11024288d5a [ 37.761038][ T283] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 37.769002][ T283] FS: 0000555590822380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 37.777947][ T283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.784520][ T283] CR2: 0000000000000170 CR3: 000000011df09000 CR4: 00000000003506a0 [ 37.792490][ T283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.800454][ T283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.808412][ T283] Call Trace: [ 37.811698][ T283] vfs_rmdir+0x247/0x3e0 [ 37.815936][ T283] incfs_kill_sb+0xfe/0x210 [ 37.820434][ T283] deactivate_locked_super+0xa0/0x100 [ 37.825799][ T283] deactivate_super+0xaf/0xe0 [ 37.830465][ T283] cleanup_mnt+0x446/0x500 [ 37.834871][ T283] __cleanup_mnt+0x19/0x20 [ 37.839278][ T283] task_work_run+0x127/0x190 [ 37.843862][ T283] ptrace_notify+0x212/0x250 [ 37.848444][ T283] ? do_notify_parent+0x7e0/0x7e0 [ 37.853461][ T283] ? user_path_at_empty+0x43/0x50 [ 37.858479][ T283] ? __x64_sys_umount+0x125/0x160 [ 37.863497][ T283] ? path_umount+0xf90/0xf90 [ 37.868080][ T283] syscall_exit_work+0x6e/0x140 [ 37.872923][ T283] syscall_exit_to_user_mode+0x5b/0x90 [ 37.878377][ T283] do_syscall_64+0x3d/0x40 [ 37.882790][ T283] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 37.888676][ T283] RIP: 0033:0x7f76991baac7 [ 37.893085][ T283] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 [ 37.912707][ T283] RSP: 002b:00007ffecfee6c68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 37.921115][ T283] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f76991baac7 [ 37.929083][ T283] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffecfee6d20 [ 37.937077][ T283] RBP: 00007ffecfee6d20 R08: 0000000000000000 R09: 0000000000000000 [ 37.945040][ T283] R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffecfee7d90 [ 37.953005][ T283] R13: 00005555908236c0 R14: 00007ffecfee7d90 R15: 0000000000000001 [ 37.960969][ T283] Modules linked in: [ 37.964872][ T283] CR2: 0000000000000170 [ 37.969049][ T283] ---[ end trace 9e2adfe97b86adfa ]--- [ 37.974520][ T283] RIP: 0010:ihold+0x26/0x60 [ 37.979017][ T283] Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 e1 29 b8 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 90 1b f2 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 61 [ 37.998626][ T283] RSP: 0018:ffffc90000b37c28 EFLAGS: 00010246 [ 38.004689][ T283] RAX: ffff88811d4e2700 RBX: 0000000000000000 RCX: 0000000000000286 [ 38.012652][ T283] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff [ 38.020621][ T283] RBP: ffffc90000b37c38 R08: 0000000000000004 R09: 0000000000000003 [ 38.028588][ T283] R10: fffffbfff0d8e248 R11: 1ffffffff0d8e248 R12: 1ffff11024288d5a [ 38.036550][ T283] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 38.044513][ T283] FS: 0000555590822380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 38.053432][ T283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.060009][ T283] CR2: 0000000000000170 CR3: 000000011df09000 CR4: 00000000003506a0 [ 38.067977][ T283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.075940][ T283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.083954][ T283] Kernel panic - not syncing: Fatal exception [ 38.090244][ T283] Kernel Offset: disabled [ 38.094563][ T283] Rebooting in 86400 seconds..