./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1646823110
<...>
Warning: Permanently added '10.128.0.98' (ED25519) to the list of known hosts.
execve("./syz-executor1646823110", ["./syz-executor1646823110"], 0x7ffcbfd951d0 /* 10 vars */) = 0
brk(NULL) = 0x555557127000
brk(0x555557127d00) = 0x555557127d00
arch_prctl(ARCH_SET_FS, 0x555557127380) = 0
set_tid_address(0x555557127650) = 5853
set_robust_list(0x555557127660, 24) = 0
rseq(0x555557127ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1646823110", 4096) = 28
getrandom("\xe6\x74\x86\x41\x75\xb2\x72\x7d", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555557127d00
brk(0x555557148d00) = 0x555557148d00
brk(0x555557149000) = 0x555557149000
mprotect(0x7f26d310c000, 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, 0executing program
) = 0x200001000000
write(1, "executing program\n", 18) = 18
openat(AT_FDCWD, "/dev/comedi0", O_RDONLY|O_EXCL|O_LARGEFILE) = 3
[ 87.350231][ T5853] ------------[ cut here ]------------
[ 87.356728][ T5853] UBSAN: shift-out-of-bounds in drivers/comedi/drivers/pcl726.c:331:46
[ 87.365276][ T5853] shift exponent -2147450880 is negative
[ 87.371127][ T5853] CPU: 0 UID: 0 PID: 5853 Comm: syz-executor164 Not tainted 6.16.0-rc5-next-20250710-syzkaller #0 PREEMPT(full)
[ 87.371143][ T5853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 87.371150][ T5853] Call Trace:
[ 87.371155][ T5853]
[ 87.371159][ T5853] dump_stack_lvl+0x189/0x250
[ 87.371198][ T5853] ? __pfx_dump_stack_lvl+0x10/0x10
[ 87.371213][ T5853] ? __pfx__printk+0x10/0x10
[ 87.371237][ T5853] ubsan_epilogue+0xa/0x40
[ 87.371249][ T5853] __ubsan_handle_shift_out_of_bounds+0x386/0x410
[ 87.371274][ T5853] ? __kmalloc_noprof+0x29b/0x4f0
[ 87.371299][ T5853] pcl726_attach+0xac4/0xd50
[ 87.371319][ T5853] comedi_device_attach+0x520/0x670
[ 87.371337][ T5853] comedi_unlocked_ioctl+0x686/0xf40
[ 87.371360][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10
[ 87.371388][ T5853] ? _raw_spin_lock_irq+0xae/0xf0
[ 87.371425][ T5853] ? __pfx_ptrace_notify+0x10/0x10
[ 87.371445][ T5853] ? bpf_lsm_file_ioctl+0x9/0x20
[ 87.371460][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10
[ 87.371476][ T5853] __se_sys_ioctl+0xfc/0x170
[ 87.371494][ T5853] do_syscall_64+0xfa/0x3b0
[ 87.371508][ T5853] ? lockdep_hardirqs_on+0x9c/0x150
[ 87.371521][ T5853] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.371532][ T5853] ? clear_bhb_loop+0x60/0xb0
[ 87.371545][ T5853] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.371555][ T5853] RIP: 0033:0x7f26d30993e9
[ 87.371567][ T5853] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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
[ 87.371576][ T5853] RSP: 002b:00007ffe26cdc9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 87.371589][ T5853] RAX: ffffffffffffffda RBX: 00007ffe26cdcb88 RCX: 00007f26d30993e9
[ 87.371597][ T5853] RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
[ 87.371604][ T5853] RBP: 00007f26d310c610 R08: 0000000000000000 R09: 00007ffe26cdcb88
[ 87.371611][ T5853] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[ 87.371617][ T5853] R13: 00007ffe26cdcb78 R14: 0000000000000001 R15: 0000000000000001
[ 87.371634][ T5853]
[ 87.371638][ T5853] ---[ end trace ]---
[ 87.582313][ T5853] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[ 87.589586][ T5853] CPU: 0 UID: 0 PID: 5853 Comm: syz-executor164 Not tainted 6.16.0-rc5-next-20250710-syzkaller #0 PREEMPT(full)
[ 87.601550][ T5853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 87.611590][ T5853] Call Trace:
[ 87.614860][ T5853]
[ 87.617778][ T5853] dump_stack_lvl+0x99/0x250
[ 87.622361][ T5853] ? __asan_memcpy+0x40/0x70
[ 87.626939][ T5853] ? __pfx_dump_stack_lvl+0x10/0x10
[ 87.632140][ T5853] ? __pfx__printk+0x10/0x10
[ 87.636812][ T5853] panic+0x2e2/0x7b0
[ 87.640701][ T5853] ? __pfx_panic+0x10/0x10
[ 87.645105][ T5853] ? _printk+0xcf/0x120
[ 87.649252][ T5853] ? __pfx__printk+0x10/0x10
[ 87.653847][ T5853] check_panic_on_warn+0x89/0xb0
[ 87.658801][ T5853] __ubsan_handle_shift_out_of_bounds+0x386/0x410
[ 87.665247][ T5853] ? __kmalloc_noprof+0x29b/0x4f0
[ 87.670298][ T5853] pcl726_attach+0xac4/0xd50
[ 87.674904][ T5853] comedi_device_attach+0x520/0x670
[ 87.680102][ T5853] comedi_unlocked_ioctl+0x686/0xf40
[ 87.685386][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10
[ 87.691198][ T5853] ? _raw_spin_lock_irq+0xae/0xf0
[ 87.696232][ T5853] ? __pfx_ptrace_notify+0x10/0x10
[ 87.701337][ T5853] ? bpf_lsm_file_ioctl+0x9/0x20
[ 87.706266][ T5853] ? __pfx_comedi_unlocked_ioctl+0x10/0x10
[ 87.712074][ T5853] __se_sys_ioctl+0xfc/0x170
[ 87.716669][ T5853] do_syscall_64+0xfa/0x3b0
[ 87.721176][ T5853] ? lockdep_hardirqs_on+0x9c/0x150
[ 87.726364][ T5853] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.732416][ T5853] ? clear_bhb_loop+0x60/0xb0
[ 87.737169][ T5853] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.743068][ T5853] RIP: 0033:0x7f26d30993e9
[ 87.747473][ T5853] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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
[ 87.767063][ T5853] RSP: 002b:00007ffe26cdc9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 87.775467][ T5853] RAX: ffffffffffffffda RBX: 00007ffe26cdcb88 RCX: 00007f26d30993e9
[ 87.783426][ T5853] RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
[ 87.791381][ T5853] RBP: 00007f26d310c610 R08: 0000000000000000 R09: 00007ffe26cdcb88
[ 87.799336][ T5853] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[ 87.807290][ T5853] R13: 00007ffe26cdcb78 R14: 0000000000000001 R15: 0000000000000001
[ 87.815260][ T5853]
[ 87.818577][ T5853] Kernel Offset: disabled
[ 87.822921][ T5853] Rebooting in 86400 seconds..