Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.347138] audit: type=1800 audit(1575352201.119:33): pid=7476 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 44.423732] kauditd_printk_skb: 1 callbacks suppressed [ 44.423746] audit: type=1400 audit(1575352205.199:35): avc: denied { map } for pid=7649 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. executing program [ 50.954514] audit: type=1400 audit(1575352211.729:36): avc: denied { map } for pid=7661 comm="syz-executor802" path="/root/syz-executor802398089" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.092670] kasan: CONFIG_KASAN_INLINE enabled [ 51.092683] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.092698] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.092709] CPU: 0 PID: 7661 Comm: syz-executor802 Not tainted 4.19.87-syzkaller #0 [ 51.092716] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.092735] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0 [ 51.092748] Code: 76 fe ff ff 41 01 dd e8 eb 0f bd fd 48 8b 85 a8 fe ff ff 80 38 00 0f 85 fe 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 51.092757] RSP: 0018:ffff888094e77748 EFLAGS: 00010203 [ 51.092773] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83ae0408 [ 51.092789] RDX: 0000000000000000 RSI: ffffffff83ae0455 RDI: 0000000000000003 [ 51.092799] RBP: ffff888094e778e0 R08: ffff888095aa8640 R09: 0000000000000004 [ 51.092809] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: dffffc0000000000 [ 51.092819] R13: 00000000000007fe R14: ffff888082643540 R15: ffff8880826438cc [ 51.092830] FS: 0000000001cce880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 51.092840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.092849] CR2: 00007f4e4432e000 CR3: 000000008e58c000 CR4: 00000000001406f0 [ 51.092860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.092869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.092876] Call Trace: [ 51.092897] ? do_con_trol+0x6070/0x6070 [ 51.092911] ? n_tty_receive_buf_common+0xbd6/0x28e0 [ 51.092927] ? lock_acquire+0x16f/0x3f0 [ 51.092939] ? n_tty_receive_buf_common+0xbd6/0x28e0 [ 51.092952] ? do_con_write.part.0+0x1eb0/0x1eb0 [ 51.092964] con_put_char+0xfa/0x110 [ 51.092976] ? do_con_write.part.0+0x1eb0/0x1eb0 [ 51.092988] ? n_tty_receive_buf_common+0xc2f/0x28e0 [ 51.093003] ? mutex_trylock+0x1e0/0x1e0 [ 51.093016] ? __lock_acquire+0x6ee/0x49c0 [ 51.093030] tty_put_char+0xc5/0x160 [ 51.093043] ? dev_match_devt+0x90/0x90 [ 51.093057] ? wait_for_completion+0x440/0x440 [ 51.093071] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 51.093084] ? con_write_room+0x5d/0x70 [ 51.093104] __process_echoes+0x37c/0xa40 [ 51.093118] n_tty_receive_buf_common+0xc13/0x28e0 [ 51.093138] ? n_tty_receive_buf2+0x40/0x40 [ 51.093150] n_tty_receive_buf+0x31/0x40 [ 51.093164] tty_ioctl+0xe91/0x1510 [ 51.093178] ? tty_vhangup+0x30/0x30 [ 51.093191] ? find_held_lock+0x35/0x130 [ 51.093206] ? debug_check_no_obj_freed+0x200/0x464 [ 51.093227] ? __might_sleep+0x95/0x190 [ 51.093240] ? trace_hardirqs_off+0x62/0x220 [ 51.093253] ? tty_vhangup+0x30/0x30 [ 51.093267] do_vfs_ioctl+0xd5f/0x1380 [ 51.093281] ? selinux_file_ioctl+0x46f/0x5e0 [ 51.093298] ? selinux_file_ioctl+0x125/0x5e0 [ 51.093310] ? ioctl_preallocate+0x210/0x210 [ 51.093323] ? selinux_file_mprotect+0x620/0x620 [ 51.093336] ? putname+0xef/0x130 [ 51.093350] ? kmem_cache_free+0x222/0x260 [ 51.093363] ? putname+0xf4/0x130 [ 51.093376] ? do_sys_open+0x31d/0x550 [ 51.093390] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.093403] ? security_file_ioctl+0x8d/0xc0 [ 51.093416] ksys_ioctl+0xab/0xd0 [ 51.093428] __x64_sys_ioctl+0x73/0xb0 [ 51.093443] do_syscall_64+0xfd/0x620 [ 51.093456] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.093467] RIP: 0033:0x444099 [ 51.093478] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 51.093487] RSP: 002b:00007ffdf92ed988 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 51.093498] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444099 [ 51.093505] RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 [ 51.093512] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 51.093519] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401da0 [ 51.093526] R13: 0000000000401e30 R14: 0000000000000000 R15: 0000000000000000 [ 51.093537] Modules linked in: [ 51.093552] ---[ end trace 1c430a8aee3c1bbb ]--- [ 51.093564] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0 [ 51.093574] Code: 76 fe ff ff 41 01 dd e8 eb 0f bd fd 48 8b 85 a8 fe ff ff 80 38 00 0f 85 fe 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 51.093580] RSP: 0018:ffff888094e77748 EFLAGS: 00010203 [ 51.093589] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83ae0408 [ 51.093595] RDX: 0000000000000000 RSI: ffffffff83ae0455 RDI: 0000000000000003 [ 51.093603] RBP: ffff888094e778e0 R08: ffff888095aa8640 R09: 0000000000000004 [ 51.093609] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: dffffc0000000000 [ 51.093619] R13: 00000000000007fe R14: ffff888082643540 R15: ffff8880826438cc [ 51.093630] FS: 0000000001cce880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 51.093640] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.093650] CR2: 00007f4e4432e000 CR3: 000000008e58c000 CR4: 00000000001406f0 [ 51.093660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.093669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.093677] Kernel panic - not syncing: Fatal exception [ 51.094980] Kernel Offset: disabled [ 51.595227] Rebooting in 86400 seconds..