./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor323871026 <...> Warning: Permanently added '10.128.1.208' (ED25519) to the list of known hosts. execve("./syz-executor323871026", ["./syz-executor323871026"], 0x7ffe9b349ac0 /* 10 vars */) = 0 brk(NULL) = 0x555563f60000 brk(0x555563f60d00) = 0x555563f60d00 arch_prctl(ARCH_SET_FS, 0x555563f60380) = 0 set_tid_address(0x555563f60650) = 5852 set_robust_list(0x555563f60660, 24) = 0 rseq(0x555563f60ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor323871026", 4096) = 27 getrandom("\xef\xbd\xc1\xfa\x57\x76\x30\xb6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555563f60d00 brk(0x555563f81d00) = 0x555563f81d00 brk(0x555563f82000) = 0x555563f82000 mprotect(0x7f55ed480000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached [pid 5853] set_robust_list(0x555563f60660, 24 [pid 5852] <... clone resumed>, child_tidptr=0x555563f60650) = 5853 [pid 5853] <... set_robust_list resumed>) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 [pid 5853] write(1, "executing program\n", 18executing program ) = 18 [pid 5853] openat(AT_FDCWD, "/dev/comedi1", O_RDONLY|O_EXCL|O_NOCTTY|FASYNC) = 3 [ 81.387367][ T5853] ------------[ cut here ]------------ [ 81.392902][ T5853] UBSAN: shift-out-of-bounds in drivers/comedi/drivers/pcl812.c:1152:10 [ 81.401372][ T5853] shift exponent 1073741829 is too large for 32-bit type 'int' [ 81.409044][ T5853] CPU: 1 UID: 0 PID: 5853 Comm: syz-executor323 Not tainted 6.16.0-rc5-next-20250711-syzkaller #0 PREEMPT(full) [ 81.409068][ T5853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 81.409088][ T5853] Call Trace: [ 81.409095][ T5853] [ 81.409101][ T5853] dump_stack_lvl+0x189/0x250 [ 81.409137][ T5853] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.409156][ T5853] ? __pfx__printk+0x10/0x10 [ 81.409184][ T5853] ubsan_epilogue+0xa/0x40 [ 81.409198][ T5853] __ubsan_handle_shift_out_of_bounds+0x386/0x410 [ 81.409233][ T5853] pcl812_attach+0x1b9e/0x2300 [ 81.409266][ T5853] comedi_device_attach+0x51d/0x670 [ 81.409302][ T5853] comedi_unlocked_ioctl+0x686/0xf40 [ 81.409324][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 81.409353][ T5853] ? _raw_spin_lock_irq+0xae/0xf0 [ 81.409394][ T5853] ? __pfx_ptrace_notify+0x10/0x10 [ 81.409436][ T5853] ? bpf_lsm_file_ioctl+0x9/0x20 [ 81.409455][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 81.409472][ T5853] __se_sys_ioctl+0xf9/0x170 [ 81.409507][ T5853] do_syscall_64+0xfa/0x3b0 [ 81.409519][ T5853] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.409531][ T5853] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.409543][ T5853] ? clear_bhb_loop+0x60/0xb0 [ 81.409558][ T5853] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.409569][ T5853] RIP: 0033:0x7f55ed40db39 [ 81.409586][ T5853] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 81.409596][ T5853] RSP: 002b:00007ffe1b9bfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 81.409609][ T5853] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f55ed40db39 [ 81.409617][ T5853] RDX: 0000200000000280 RSI: 0000000040946400 RDI: 0000000000000003 [ 81.409625][ T5853] RBP: 00007f55ed4805f0 R08: 0000000000000006 R09: 0000000000000006 [ 81.409632][ T5853] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 81.409639][ T5853] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 81.409657][ T5853] [ 81.409662][ T5853] ---[ end trace ]--- [ 81.615474][ T5853] Kernel panic - not syncing: UBSAN: panic_on_warn set ... [ 81.622679][ T5853] CPU: 1 UID: 0 PID: 5853 Comm: syz-executor323 Not tainted 6.16.0-rc5-next-20250711-syzkaller #0 PREEMPT(full) [ 81.634698][ T5853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 81.644762][ T5853] Call Trace: [ 81.648037][ T5853] [ 81.650960][ T5853] dump_stack_lvl+0x99/0x250 [ 81.655549][ T5853] ? __asan_memcpy+0x40/0x70 [ 81.660137][ T5853] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.665332][ T5853] ? __pfx__printk+0x10/0x10 [ 81.669932][ T5853] vpanic+0x281/0x750 [ 81.673923][ T5853] ? __pfx_vpanic+0x10/0x10 [ 81.678434][ T5853] panic+0xb9/0xc0 [ 81.682146][ T5853] ? __pfx_panic+0x10/0x10 [ 81.686558][ T5853] ? __pfx__printk+0x10/0x10 [ 81.691182][ T5853] check_panic_on_warn+0x89/0xb0 [ 81.696111][ T5853] __ubsan_handle_shift_out_of_bounds+0x386/0x410 [ 81.702538][ T5853] pcl812_attach+0x1b9e/0x2300 [ 81.707323][ T5853] comedi_device_attach+0x51d/0x670 [ 81.712529][ T5853] comedi_unlocked_ioctl+0x686/0xf40 [ 81.717820][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 81.723631][ T5853] ? _raw_spin_lock_irq+0xae/0xf0 [ 81.728780][ T5853] ? __pfx_ptrace_notify+0x10/0x10 [ 81.733898][ T5853] ? bpf_lsm_file_ioctl+0x9/0x20 [ 81.738830][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 81.744635][ T5853] __se_sys_ioctl+0xf9/0x170 [ 81.749235][ T5853] do_syscall_64+0xfa/0x3b0 [ 81.753727][ T5853] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.758913][ T5853] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.764967][ T5853] ? clear_bhb_loop+0x60/0xb0 [ 81.769644][ T5853] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.775542][ T5853] RIP: 0033:0x7f55ed40db39 [ 81.779970][ T5853] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 81.799577][ T5853] RSP: 002b:00007ffe1b9bfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 81.808020][ T5853] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f55ed40db39 [ 81.815979][ T5853] RDX: 0000200000000280 RSI: 0000000040946400 RDI: 0000000000000003 [ 81.823940][ T5853] RBP: 00007f55ed4805f0 R08: 0000000000000006 R09: 0000000000000006 [ 81.831905][ T5853] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 81.839868][ T5853] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 81.847851][ T5853] [ 81.851237][ T5853] Kernel Offset: disabled [ 81.855590][ T5853] Rebooting in 86400 seconds..