./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1116455720 <...> Warning: Permanently added '10.128.1.137' (ED25519) to the list of known hosts. execve("./syz-executor1116455720", ["./syz-executor1116455720"], 0x7ffda5c3c180 /* 10 vars */) = 0 brk(NULL) = 0x555591535000 brk(0x555591535d00) = 0x555591535d00 arch_prctl(ARCH_SET_FS, 0x555591535380) = 0 set_tid_address(0x555591535650) = 296 set_robust_list(0x555591535660, 24) = 0 rseq(0x555591535ca0, 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-executor1116455720", 4096) = 28 getrandom("\x43\xf8\x37\x1f\x0c\xda\x74\x6c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555591535d00 brk(0x555591556d00) = 0x555591556d00 brk(0x555591557000) = 0x555591557000 mprotect(0x7f50efa8b000, 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.WfmXov", 0700) = 0 chmod("./syzkaller.WfmXov", 0777) = 0 chdir("./syzkaller.WfmXov") = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555591535650) = 297 ./strace-static-x86_64: Process 297 attached [pid 297] set_robust_list(0x555591535660, 24) = 0 [pid 297] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 297] getppid() = 0 [pid 297] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 297] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 297] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 297] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 297] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 297] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 297] unshare(CLONE_NEWNS) = 0 [pid 297] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 297] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 297] unshare(CLONE_NEWCGROUP) = 0 [pid 297] unshare(CLONE_NEWUTS) = 0 [pid 297] unshare(CLONE_SYSVSEM) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] getpid() = 1 [pid 297] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b eb 81 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 59 ff ff ff 4c [ 27.210234][ T297] RSP: 0018:ffffc900011dfa80 EFLAGS: 00010293 [ 27.216332][ T297] RAX: ffffffff81edb95e RBX: ffff88810cee16c0 RCX: ffff888102ff3900 [ 27.224372][ T297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 27.232399][ T297] RBP: ffffc900011dfaa8 R08: 0000000000000003 R09: 0000000000000004 [ 27.240420][ T297] R10: dffffc0000000000 R11: fffff5200023bf40 R12: dffffc0000000000 [ 27.248412][ T297] R13: 1ffff110219dc2e1 R14: ffff88810cee1708 R15: 0000000000000000 [ 27.256436][ T297] FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 27.265414][ T297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.272037][ T297] CR2: 00007f50efa921b0 CR3: 000000010ab2a000 CR4: 00000000003526b0 [ 27.280052][ T297] Call Trace: [ 27.283339][ T297] [ 27.286269][ T297] shmem_rmdir+0x5f/0x90 [ 27.290613][ T297] vfs_rmdir+0x3e0/0x560 [ 27.294881][ T297] incfs_kill_sb+0x109/0x230 [ 27.299507][ T297] deactivate_locked_super+0xd8/0x2a0 [ 27.304905][ T297] deactivate_super+0xb8/0xe0 [ 27.309621][ T297] cleanup_mnt+0x3f1/0x480 [ 27.314069][ T297] __cleanup_mnt+0x1d/0x40 [ 27.318484][ T297] task_work_run+0x1e0/0x250 [ 27.323100][ T297] ? __cfi_task_work_run+0x10/0x10 [ 27.328247][ T297] ? free_nsproxy+0x223/0x290 [ 27.332962][ T297] do_exit+0x9bc/0x2630 [ 27.337148][ T297] ? __cfi_do_exit+0x10/0x10 [ 27.341778][ T297] ? __kasan_check_write+0x18/0x20 [ 27.346911][ T297] ? _raw_spin_lock_irq+0x8d/0x120 [ 27.352047][ T297] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 27.357632][ T297] ? zap_other_threads+0x334/0x370 [ 27.362769][ T297] do_group_exit+0x22a/0x300 [ 27.367385][ T297] __x64_sys_exit_group+0x43/0x50 [ 27.372447][ T297] x64_sys_call+0x2ed2/0x2ee0 [ 27.377167][ T297] do_syscall_64+0x58/0xf0 [ 27.381624][ T297] ? clear_bhb_loop+0x50/0xa0 [ 27.386325][ T297] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 27.392253][ T297] RIP: 0033:0x7f50efa15709 [ 27.396693][ T297] Code: Unable to access opcode bytes at 0x7f50efa156df. [ 27.403731][ T297] RSP: 002b:00007ffe974262a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.412189][ T297] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f50efa15709 [ 27.420192][ T297] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 27.428211][ T297] RBP: 00007f50efa91350 R08: ffffffffffffffb8 R09: 0000000000000000 [ 27.436214][ T297] R10: 0000000000001000 R11: 0000000000000246 R12: 00007f50efa91350 [ 27.444243][ T297] R13: 0000000000000000 R14: 00007f50efa91da0 R15: 00007f50ef9e66f0 [ 27.452271][ T297] [ 27.455299][ T297] ---[ end trace 0000000000000000 ]--- [ 27.460912][ T297] ================================================================== [ 27.468997][ T297] BUG: KASAN: null-ptr-deref in ihold+0x24/0x70 [ 27.475236][ T297] Write of size 4 at addr 0000000000000168 by task syz-executor111/297 [ 27.483474][ T297] [ 27.485802][ T297] CPU: 1 UID: 0 PID: 297 Comm: syz-executor111 Tainted: G W 6.12.38-syzkaller-gd0c633175c04 #0 79f03ae2e0a264f34f505a942aaa3597bcba712e [ 27.485826][ T297] Tainted: [W]=WARN [ 27.485831][ T297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 27.485840][ T297] Call Trace: [ 27.485845][ T297] [ 27.485851][ T297] __dump_stack+0x21/0x30 [ 27.485873][ T297] dump_stack_lvl+0x10c/0x190 [ 27.485893][ T297] ? __cfi_dump_stack_lvl+0x10/0x10 [ 27.485914][ T297] print_report+0x3d/0x70 [ 27.485930][ T297] kasan_report+0x163/0x1a0 [ 27.485946][ T297] ? ihold+0x24/0x70 [ 27.485967][ T297] ? _raw_spin_unlock+0x45/0x60 [ 27.485985][ T297] ? ihold+0x24/0x70 [ 27.486000][ T297] kasan_check_range+0x299/0x2a0 [ 27.486017][ T297] __kasan_check_write+0x18/0x20 [ 27.486038][ T297] ihold+0x24/0x70 [ 27.486053][ T297] vfs_rmdir+0x26a/0x560 [ 27.486072][ T297] incfs_kill_sb+0x109/0x230 [ 27.486095][ T297] deactivate_locked_super+0xd8/0x2a0 [ 27.486115][ T297] deactivate_super+0xb8/0xe0 [ 27.486133][ T297] cleanup_mnt+0x3f1/0x480 [ 27.486150][ T297] __cleanup_mnt+0x1d/0x40 [ 27.486165][ T297] task_work_run+0x1e0/0x250 [ 27.486183][ T297] ? __cfi_task_work_run+0x10/0x10 [ 27.486201][ T297] ? free_nsproxy+0x223/0x290 [ 27.486222][ T297] do_exit+0x9bc/0x2630 [ 27.486261][ T297] ? __cfi_do_exit+0x10/0x10 [ 27.486280][ T297] ? __kasan_check_write+0x18/0x20 [ 27.486301][ T297] ? _raw_spin_lock_irq+0x8d/0x120 [ 27.486319][ T297] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 27.486337][ T297] ? zap_other_threads+0x334/0x370 [ 27.486355][ T297] do_group_exit+0x22a/0x300 [ 27.486375][ T297] __x64_sys_exit_group+0x43/0x50 [ 27.486394][ T297] x64_sys_call+0x2ed2/0x2ee0 [ 27.486417][ T297] do_syscall_64+0x58/0xf0 [ 27.486434][ T297] ? clear_bhb_loop+0x50/0xa0 [ 27.486457][ T297] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 27.486480][ T297] RIP: 0033:0x7f50efa15709 [ 27.486492][ T297] Code: Unable to access opcode bytes at 0x7f50efa156df. [ 27.486500][ T297] RSP: 002b:00007ffe974262a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.486516][ T297] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f50efa15709 [ 27.486528][ T297] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 27.486537][ T297] RBP: 00007f50efa91350 R08: ffffffffffffffb8 R09: 0000000000000000 [ 27.486548][ T297] R10: 0000000000001000 R11: 0000000000000246 R12: 00007f50efa91350 [ 27.486558][ T297] R13: 0000000000000000 R14: 00007f50efa91da0 R15: 00007f50ef9e66f0 [ 27.486571][ T297] [ 27.486577][ T297] ================================================================== [ 27.742394][ T297] Disabling lock debugging due to kernel taint [ 27.748594][ T297] BUG: kernel NULL pointer dereference, address: 0000000000000168 [ 27.756419][ T297] #PF: supervisor write access in kernel mode [ 27.762668][ T297] #PF: error_code(0x0002) - not-present page [ 27.768638][ T297] PGD 0 P4D 0 [ 27.772009][ T297] Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI [ 27.778071][ T297] CPU: 1 UID: 0 PID: 297 Comm: syz-executor111 Tainted: G B W 6.12.38-syzkaller-gd0c633175c04 #0 79f03ae2e0a264f34f505a942aaa3597bcba712e [ 27.793358][ T297] Tainted: [B]=BAD_PAGE, [W]=WARN [ 27.798374][ T297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 27.808424][ T297] RIP: 0010:ihold+0x2a/0x70 [ 27.812927][ T297] Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 1a 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 2c 45 ee ff 41 be 01 00 00 00 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd [ 27.832528][ T297] RSP: 0018:ffffc900011dfac0 EFLAGS: 00010246 [ 27.838599][ T297] RAX: ffff888102ff3900 RBX: 0000000000000000 RCX: ffff888102ff3900 [ 27.846566][ T297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 27.854530][ T297] RBP: ffffc900011dfad0 R08: ffffffff8896a947 R09: 1ffffffff112d528 [ 27.862497][ T297] R10: dffffc0000000000 R11: fffffbfff112d529 R12: ffff88810cee16cc [ 27.870463][ T297] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 27.878522][ T297] FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 27.887451][ T297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.894025][ T297] CR2: 0000000000000168 CR3: 000000010ab2a000 CR4: 00000000003526b0 [ 27.901997][ T297] Call Trace: [ 27.905268][ T297] [ 27.908195][ T297] vfs_rmdir+0x26a/0x560 [ 27.912442][ T297] incfs_kill_sb+0x109/0x230 [ 27.917032][ T297] deactivate_locked_super+0xd8/0x2a0 [ 27.922404][ T297] deactivate_super+0xb8/0xe0 [ 27.927081][ T297] cleanup_mnt+0x3f1/0x480 [ 27.931498][ T297] __cleanup_mnt+0x1d/0x40 [ 27.935911][ T297] task_work_run+0x1e0/0x250 [ 27.940509][ T297] ? __cfi_task_work_run+0x10/0x10 [ 27.945629][ T297] ? free_nsproxy+0x223/0x290 [ 27.950451][ T297] do_exit+0x9bc/0x2630 [ 27.954695][ T297] ? __cfi_do_exit+0x10/0x10 [ 27.959306][ T297] ? __kasan_check_write+0x18/0x20 [ 27.964430][ T297] ? _raw_spin_lock_irq+0x8d/0x120 [ 27.969547][ T297] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 27.975141][ T297] ? zap_other_threads+0x334/0x370 [ 27.980285][ T297] do_group_exit+0x22a/0x300 [ 27.984884][ T297] __x64_sys_exit_group+0x43/0x50 [ 27.989914][ T297] x64_sys_call+0x2ed2/0x2ee0 [ 27.994610][ T297] do_syscall_64+0x58/0xf0 [ 27.999036][ T297] ? clear_bhb_loop+0x50/0xa0 [ 28.003725][ T297] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 28.009626][ T297] RIP: 0033:0x7f50efa15709 [ 28.014041][ T297] Code: Unable to access opcode bytes at 0x7f50efa156df. [ 28.021052][ T297] RSP: 002b:00007ffe974262a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.029473][ T297] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f50efa15709 [ 28.037445][ T297] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.045408][ T297] RBP: 00007f50efa91350 R08: ffffffffffffffb8 R09: 0000000000000000 [ 28.053386][ T297] R10: 0000000000001000 R11: 0000000000000246 R12: 00007f50efa91350 [ 28.061356][ T297] R13: 0000000000000000 R14: 00007f50efa91da0 R15: 00007f50ef9e66f0 [ 28.069324][ T297] [ 28.072339][ T297] Modules linked in: [ 28.076239][ T297] CR2: 0000000000000168 [ 28.080405][ T297] ---[ end trace 0000000000000000 ]--- [ 28.085854][ T297] RIP: 0010:ihold+0x2a/0x70 [ 28.090358][ T297] Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 1a 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 2c 45 ee ff 41 be 01 00 00 00 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd [ 28.109955][ T297] RSP: 0018:ffffc900011dfac0 EFLAGS: 00010246 [ 28.116019][ T297] RAX: ffff888102ff3900 RBX: 0000000000000000 RCX: ffff888102ff3900 [ 28.123981][ T297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 28.131947][ T297] RBP: ffffc900011dfad0 R08: ffffffff8896a947 R09: 1ffffffff112d528 [ 28.139937][ T297] R10: dffffc0000000000 R11: fffffbfff112d529 R12: ffff88810cee16cc [ 28.148000][ T297] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 28.155974][ T297] FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 28.164908][ T297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.171494][ T297] CR2: 0000000000000168 CR3: 000000010ab2a000 CR4: 00000000003526b0 [ 28.179480][ T297] Kernel panic - not syncing: Fatal exception [ 28.185739][ T297] Kernel Offset: disabled [ 28.190068][ T297] Rebooting in 86400 seconds..