./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2372318405

<...>
Warning: Permanently added '10.128.0.225' (ECDSA) to the list of known hosts.
execve("./syz-executor2372318405", ["./syz-executor2372318405"], 0x7ffc1ef74ab0 /* 10 vars */) = 0
brk(NULL)                               = 0x555556e8d000
brk(0x555556e8dc40)                     = 0x555556e8dc40
arch_prctl(ARCH_SET_FS, 0x555556e8d300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor2372318405", 4096) = 28
brk(0x555556eaec40)                     = 0x555556eaec40
brk(0x555556eaf000)                     = 0x555556eaf000
mprotect(0x7f76c0ecb000, 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/ptmx", O_RDONLY) = 3
ioctl(3, TIOCSETD, [21])                = 0
dup(3)                                  = 4
syzkaller login: [   48.474270][ T3606] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   48.482108][ T3606] #PF: supervisor instruction fetch in kernel mode
[   48.488584][ T3606] #PF: error_code(0x0010) - not-present page
[   48.494542][ T3606] PGD 74c90067 P4D 74c90067 PUD 74c53067 PMD 0 
[   48.500779][ T3606] Oops: 0010 [#1] PREEMPT SMP KASAN
[   48.505953][ T3606] CPU: 1 PID: 3606 Comm: syz-executor237 Not tainted 5.19.0-next-20220808-syzkaller #0
[   48.515556][ T3606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[   48.525589][ T3606] RIP: 0010:0x0
[   48.529037][ T3606] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[   48.536735][ T3606] RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
[   48.542802][ T3606] RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
[   48.550765][ T3606] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
[   48.558757][ T3606] RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
[   48.566724][ T3606] R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
[   48.574685][ T3606] R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
[   48.582661][ T3606] FS:  0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
[   48.591592][ T3606] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.598175][ T3606] CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
[   48.606178][ T3606] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   48.614153][ T3606] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   48.622122][ T3606] Call Trace:
[   48.625396][ T3606]  <TASK>
[   48.628343][ T3606]  gsmld_receive_buf+0x1c2/0x2f0
[   48.633304][ T3606]  ? gsmld_write_wakeup+0x130/0x130
[   48.638512][ T3606]  tty_ioctl+0xa75/0x15d0
[   48.642850][ T3606]  ? tty_fasync+0x390/0x390
[   48.647382][ T3606]  ? find_held_lock+0x2d/0x110
[   48.652184][ T3606]  ? ptrace_notify+0xfa/0x140
[   48.656883][ T3606]  ? lock_downgrade+0x6e0/0x6e0
[   48.661738][ T3606]  ? _raw_spin_unlock_irq+0x1f/0x40
[   48.666947][ T3606]  ? bpf_lsm_file_ioctl+0x5/0x10
[   48.671912][ T3606]  ? tty_fasync+0x390/0x390
[   48.676418][ T3606]  __x64_sys_ioctl+0x193/0x200
[   48.681189][ T3606]  do_syscall_64+0x35/0xb0
[   48.685616][ T3606]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   48.691508][ T3606] RIP: 0033:0x7f76c0e5eb59
[   48.695922][ T3606] 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
[   48.715530][ T3606] RSP: 002b:00007ffe9a4f7c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   48.723942][ T3606] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76c0e5eb59
[   48.731925][ T3606] RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
[   48.739893][ T3606] RBP: 00007f76c0e22d00 R08: 0000000000000000 R09: 0000000000000000
[   48.747860][ T3606] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76c0e22d90
[   48.755828][ T3606] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   48.763809][ T3606]  </TASK>
[   48.766826][ T3606] Modules linked in:
[   48.770713][ T3606] CR2: 0000000000000000
[   48.774859][ T3606] ---[ end trace 0000000000000000 ]---
[   48.780304][ T3606] RIP: 0010:0x0
[   48.783766][ T3606] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[   48.791473][ T3606] RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
[   48.797535][ T3606] RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
[   48.805500][ T3606] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
[   48.813471][ T3606] RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
[   48.821436][ T3606] R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
[   48.829401][ T3606] R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
[   48.837367][ T3606] FS:  0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
[   48.846298][ T3606] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.852881][ T3606] CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
[   48.860851][ T3606] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   48.868819][ T3606] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   48.876793][ T3606] Kernel panic - not syncing: Fatal exception
[   48.882994][ T3606] Kernel Offset: disabled
[   48.887309][ T3606] Rebooting in 86400 seconds..