Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.623540] FAULT_INJECTION: forcing a failure. [ 57.623540] name failslab, interval 1, probability 0, space 0, times 1 [ 57.634849] CPU: 1 PID: 8131 Comm: syz-executor164 Not tainted 4.19.211-syzkaller #0 [ 57.642727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 57.652089] Call Trace: [ 57.654662] dump_stack+0x1fc/0x2ef [ 57.658272] should_fail.cold+0xa/0xf [ 57.662075] ? setup_fault_attr+0x200/0x200 [ 57.666389] ? lock_acquire+0x170/0x3c0 [ 57.670345] __should_failslab+0x115/0x180 [ 57.674560] should_failslab+0x5/0x10 [ 57.679144] kmem_cache_alloc_trace+0x284/0x380 [ 57.683802] tty_register_device_attr+0x21c/0x7a0 [ 57.688634] ? redirected_tty_write+0xb0/0xb0 [ 57.693124] ? __lockdep_init_map+0x100/0x5a0 [ 57.697601] ? __raw_spin_lock_init+0x28/0x100 [ 57.702164] ? tty_port_init+0x14d/0x1b0 [ 57.706209] ? gsm_dlci_alloc+0x353/0x410 [ 57.710340] gsmld_open+0x55f/0x7e0 [ 57.713957] ? gsmld_close+0x1f0/0x1f0 [ 57.717827] tty_ldisc_open+0x81/0xc0 [ 57.721661] tty_set_ldisc+0x2d2/0x650 [ 57.725535] tty_ioctl+0xb4b/0x1630 [ 57.729154] ? tty_fasync+0x300/0x300 [ 57.732961] ? get_pid_task+0xf4/0x190 [ 57.737007] ? proc_fail_nth_write+0x95/0x1d0 [ 57.741616] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 57.746529] ? mark_held_locks+0xf0/0xf0 [ 57.750582] ? __vfs_write+0xff/0x770 [ 57.755148] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 57.760157] ? common_file_perm+0x4e5/0x850 [ 57.764471] ? tty_fasync+0x300/0x300 [ 57.768264] do_vfs_ioctl+0xcdb/0x12e0 [ 57.772137] ? vfs_write+0x3d7/0x540 [ 57.775841] ? ioctl_preallocate+0x200/0x200 [ 57.780233] ? lock_downgrade+0x720/0x720 [ 57.784365] ? check_preemption_disabled+0x41/0x280 [ 57.789364] ? vfs_write+0x393/0x540 [ 57.793087] ? ksys_write+0x1c8/0x2a0 [ 57.796880] ksys_ioctl+0x9b/0xc0 [ 57.800336] __x64_sys_ioctl+0x6f/0xb0 [ 57.804320] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 57.808891] do_syscall_64+0xf9/0x620 [ 57.812679] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.817849] RIP: 0033:0x7fcc27b11069 [ 57.821544] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48 [ 57.840437] RSP: 002b:00007ffe7808ce78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 57.848134] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fcc27b11069 [ 57.855406] RDX: 00000000200000c0 RSI: 0000000000005423 RDI: 0000000000000003 [ 57.862751] RBP: 00007ffe7808ce90 R08: 0000000000000001 R09: 0000000000000001 [ 57.870007] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 57.877278] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 57.966378] kasan: CONFIG_KASAN_INLINE enabled [ 57.975351] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 57.993730] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 58.000004] CPU: 1 PID: 8131 Comm: syz-executor164 Not tainted 4.19.211-syzkaller #0 [ 58.007879] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 58.017238] RIP: 0010:cdev_del+0x22/0x90 [ 58.021300] Code: cf 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 ec 08 e8 b3 dc be ff 48 8d 7d 64 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4f 48 [ 58.040284] RSP: 0018:ffff8880b259fba0 EFLAGS: 00010207 [ 58.045739] RAX: dffffc0000000000 RBX: ffff8880af2a0f00 RCX: ffffffff83b8674f [ 58.053093] RDX: 000000000000000c RSI: ffffffff81a3a8bd RDI: 0000000000000064 [ 58.060363] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 58.067632] R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880af2a0f08 [ 58.074907] R13: ffff8880af370388 R14: ffff8880ab877d00 R15: ffff8880b07c7778 [ 58.082166] FS: 0000555556b33300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 58.090374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.096237] CR2: 00007ffd0b1179d7 CR3: 000000009df0d000 CR4: 00000000003406e0 [ 58.103491] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.110921] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.118255] Call Trace: [ 58.120853] tty_unregister_device+0x112/0x1b0 [ 58.125418] gsmld_close+0xaa/0x1f0 [ 58.129116] ? gsm_cleanup_mux+0x3e0/0x3e0 [ 58.133331] tty_ldisc_close+0xa2/0xd0 [ 58.137199] tty_ldisc_release+0xf5/0x440 [ 58.141361] tty_release_struct+0x20/0xe0 [ 58.145669] tty_release+0xc70/0x1210 [ 58.149949] ? do_tty_hangup+0x30/0x30 [ 58.153830] __fput+0x2ce/0x890 [ 58.157098] task_work_run+0x148/0x1c0 [ 58.160967] do_exit+0xbf3/0x2be0 [ 58.164405] ? lock_downgrade+0x720/0x720 [ 58.168543] ? mm_update_next_owner+0x650/0x650 [ 58.173193] ? up_read+0x17/0x110 [ 58.176646] ? __do_page_fault+0x180/0xd60 [ 58.180864] do_group_exit+0x125/0x310 [ 58.184734] __x64_sys_exit_group+0x3a/0x50 [ 58.189039] do_syscall_64+0xf9/0x620 [ 58.192829] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.198002] RIP: 0033:0x7fcc27b0fcf9 [ 58.201787] Code: Bad RIP value. [ 58.205132] RSP: 002b:00007ffe7808ce28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 58.212830] RAX: ffffffffffffffda RBX: 00007fcc27b843f0 RCX: 00007fcc27b0fcf9 [ 58.220280] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 58.227554] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 58.234893] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc27b843f0 [ 58.242163] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 58.249789] Modules linked in: [ 58.257787] ---[ end trace 8b0861cc28c720f3 ]--- [ 58.273976] RIP: 0010:cdev_del+0x22/0x90 [ 58.278085] Code: cf 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 ec 08 e8 b3 dc be ff 48 8d 7d 64 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4f 48 [ 58.297981] RSP: 0018:ffff8880b259fba0 EFLAGS: 00010207 [ 58.304211] RAX: dffffc0000000000 RBX: ffff8880af2a0f00 RCX: ffffffff83b8674f [ 58.311734] RDX: 000000000000000c RSI: ffffffff81a3a8bd RDI: 0000000000000064 [ 58.319087] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 58.326348] R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880af2a0f08 [ 58.333731] R13: ffff8880af370388 R14: ffff8880ab877d00 R15: ffff8880b07c7778 [ 58.341045] FS: 0000555556b33300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 58.349314] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.355190] CR2: 00007f7931bd0740 CR3: 00000000af730000 CR4: 00000000003406e0 [ 58.362990] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.370296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.377563] Kernel panic - not syncing: Fatal exception [ 58.383144] Kernel Offset: disabled [ 58.386753] Rebooting in 86400 seconds..