./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor245296155

<...>
Warning: Permanently added '10.128.0.108' (ECDSA) to the list of known hosts.
execve("./syz-executor245296155", ["./syz-executor245296155"], 0x7ffd30759440 /* 10 vars */) = 0
brk(NULL)                               = 0x555555cb6000
brk(0x555555cb6c40)                     = 0x555555cb6c40
arch_prctl(ARCH_SET_FS, 0x555555cb6300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor245296155", 4096) = 27
brk(0x555555cd7c40)                     = 0x555555cd7c40
brk(0x555555cd8000)                     = 0x555555cd8000
mprotect(0x7fefe831a000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
openat(AT_FDCWD, "/dev/ttyS3", O_RDONLY) = 3
ioctl(3, TIOCSETD, [21])                = 0
syzkaller login: [   39.704493][ T3604] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   39.712403][ T3604] #PF: supervisor instruction fetch in kernel mode
[   39.718880][ T3604] #PF: error_code(0x0010) - not-present page
[   39.724832][ T3604] PGD 1be59067 P4D 1be59067 PUD 1e75f067 PMD 0 
[   39.731060][ T3604] Oops: 0010 [#1] PREEMPT SMP KASAN
[   39.736233][ T3604] CPU: 0 PID: 3604 Comm: syz-executor245 Not tainted 6.0.0-rc2-syzkaller-00327-g8379c0b31fbc #0
[   39.746619][ T3604] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[   39.756650][ T3604] RIP: 0010:0x0
[   39.760094][ T3604] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[   39.767784][ T3604] RSP: 0018:ffffc90003b5fcf0 EFLAGS: 00010202
[   39.773829][ T3604] RAX: 0000000000000001 RBX: ffff8881474a2000 RCX: 0000000000000000
[   39.781779][ T3604] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881474a2000
[   39.789727][ T3604] RBP: ffffc90003b5fda1 R08: 0000000000000001 R09: 0000000000000004
[   39.797762][ T3604] R10: 0000000000000000 R11: 1ffffffff2005487 R12: 0000000000000001
[   39.805708][ T3604] R13: 0000000000000000 R14: ffffc90003b5fd90 R15: dffffc0000000000
[   39.813659][ T3604] FS:  0000555555cb6300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[   39.822567][ T3604] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.829173][ T3604] CR2: ffffffffffffffd6 CR3: 000000001f485000 CR4: 0000000000350ef0
[   39.837817][ T3604] Call Trace:
[   39.841073][ T3604]  <TASK>
[   39.844069][ T3604]  gsmld_receive_buf+0x1c2/0x2f0
[   39.849008][ T3604]  ? gsmld_write_wakeup+0x130/0x130
[   39.854183][ T3604]  tty_ioctl+0xa75/0x15d0
[   39.858488][ T3604]  ? tty_fasync+0x390/0x390
[   39.862971][ T3604]  ? find_held_lock+0x2d/0x110
[   39.867716][ T3604]  ? ptrace_notify+0xfa/0x140
[   39.872543][ T3604]  ? lock_downgrade+0x6e0/0x6e0
[   39.877369][ T3604]  ? _raw_spin_unlock_irq+0x1f/0x40
[   39.882549][ T3604]  ? bpf_lsm_file_ioctl+0x5/0x10
[   39.887469][ T3604]  ? tty_fasync+0x390/0x390
[   39.891950][ T3604]  __x64_sys_ioctl+0x193/0x200
[   39.896690][ T3604]  do_syscall_64+0x35/0xb0
[   39.901099][ T3604]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   39.906971][ T3604] RIP: 0033:0x7fefe82adb39
[   39.911364][ T3604] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48
[   39.930951][ T3604] RSP: 002b:00007fff1e9ea178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   39.939339][ T3604] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fefe82adb39
[   39.947292][ T3604] RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000003
[   39.955328][ T3604] RBP: 00007fefe8271ce0 R08: 0000000000000000 R09: 0000000000000000
[   39.963279][ T3604] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fefe8271d70
[   39.971243][ T3604] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   39.979219][ T3604]  </TASK>
[   39.982219][ T3604] Modules linked in:
[   39.986092][ T3604] CR2: 0000000000000000
[   39.990535][ T3604] ---[ end trace 0000000000000000 ]---
[   39.995970][ T3604] RIP: 0010:0x0
[   39.999414][ T3604] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[   40.007105][ T3604] RSP: 0018:ffffc90003b5fcf0 EFLAGS: 00010202
[   40.013150][ T3604] RAX: 0000000000000001 RBX: ffff8881474a2000 RCX: 0000000000000000
[   40.021099][ T3604] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881474a2000
[   40.029233][ T3604] RBP: ffffc90003b5fda1 R08: 0000000000000001 R09: 0000000000000004
[   40.037184][ T3604] R10: 0000000000000000 R11: 1ffffffff2005487 R12: 0000000000000001
[   40.045244][ T3604] R13: 0000000000000000 R14: ffffc90003b5fd90 R15: dffffc0000000000
[   40.053204][ T3604] FS:  0000555555cb6300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[   40.062119][ T3604] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.068862][ T3604] CR2: ffffffffffffffd6 CR3: 000000001f485000 CR4: 0000000000350ef0
[   40.076817][ T3604] Kernel panic - not syncing: Fatal exception
[   40.083666][ T3604] Kernel Offset: disabled
[   40.087981][ T3604] Rebooting in 86400 seconds..