[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.919690][ T24] audit: type=1800 audit(1558059784.070:25): pid=8365 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.970037][ T24] audit: type=1800 audit(1558059784.070:26): pid=8365 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.024079][ T24] audit: type=1800 audit(1558059784.070:27): pid=8365 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.211' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.961122][ T8517] BUG: spinlock bad magic on CPU#0, syz-executor715/8517 [ 66.968313][ T8517] kasan: CONFIG_KASAN_INLINE enabled [ 66.973566][ T8517] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 66.981633][ T8517] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 66.988562][ T8517] CPU: 0 PID: 8517 Comm: syz-executor715 Not tainted 5.1.0+ #17 [ 66.996161][ T8517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.006204][ T8517] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 67.011462][ T8517] Code: ae 4c 02 00 e8 75 5d bf 05 58 5b 41 5c 41 5d 41 5e 5d c3 48 8d bb d0 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 24 44 8b ab d0 04 00 00 48 81 c3 [ 67.031042][ T8517] RSP: 0018:ffff888086267538 EFLAGS: 00010202 [ 67.037102][ T8517] RAX: dffffc0000000000 RBX: 0000000078e05280 RCX: 0000000000000000 [ 67.045046][ T8517] RDX: 000000000f1c0aea RSI: ffffffff815afbe6 RDI: 0000000078e05750 [ 67.052989][ T8517] RBP: ffff888086267560 R08: 0000000000000036 R09: ffffed1015d06011 [ 67.060933][ T8517] R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff888216427ba8 [ 67.068876][ T8517] R13: ffff88808e534300 R14: ffff888216426980 R15: ffff8880862675d8 [ 67.076839][ T8517] FS: 0000000000b40880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 67.085740][ T8517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.092295][ T8517] CR2: 0000000020000204 CR3: 0000000098123000 CR4: 00000000001406f0 [ 67.100243][ T8517] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.108189][ T8517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.116129][ T8517] Call Trace: [ 67.119396][ T8517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.125617][ T8517] do_raw_spin_lock+0x231/0x2e0 [ 67.130440][ T8517] ? rwlock_bug.part.0+0x90/0x90 [ 67.135349][ T8517] ? lock_acquire+0x16f/0x3f0 [ 67.139999][ T8517] ? rhashtable_walk_enter+0xf9/0x390 [ 67.145346][ T8517] _raw_spin_lock+0x37/0x40 [ 67.149822][ T8517] ? rhashtable_walk_enter+0xf9/0x390 [ 67.156580][ T8517] rhashtable_walk_enter+0xf9/0x390 [ 67.161843][ T8517] __tipc_dump_start+0x1fa/0x3c0 [ 67.166752][ T8517] tipc_dump_start+0x70/0x90 [ 67.171318][ T8517] __netlink_dump_start+0x4fb/0x7e0 [ 67.176490][ T8517] ? __tipc_dump_start+0x3c0/0x3c0 [ 67.181576][ T8517] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 67.187353][ T8517] ? __tipc_diag_gen_cookie+0x90/0x90 [ 67.192699][ T8517] ? sock_diag_rcv+0x1c/0x40 [ 67.197264][ T8517] ? __tipc_dump_start+0x3c0/0x3c0 [ 67.202345][ T8517] ? tipc_unregister_sysctl+0x20/0x20 [ 67.207688][ T8517] ? tipc_ioctl+0x2e0/0x2e0 [ 67.212168][ T8517] sock_diag_rcv_msg+0x322/0x410 [ 67.217083][ T8517] netlink_rcv_skb+0x17a/0x460 [ 67.221820][ T8517] ? sock_diag_bind+0x80/0x80 [ 67.226471][ T8517] ? netlink_ack+0xb50/0xb50 [ 67.231035][ T8517] ? kasan_check_read+0x11/0x20 [ 67.235857][ T8517] ? netlink_deliver_tap+0x254/0xc00 [ 67.241116][ T8517] sock_diag_rcv+0x2b/0x40 [ 67.245503][ T8517] netlink_unicast+0x536/0x720 [ 67.250244][ T8517] ? netlink_attachskb+0x770/0x770 [ 67.255326][ T8517] ? _copy_from_iter_full+0x25d/0x8c0 [ 67.260672][ T8517] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 67.266380][ T8517] ? __check_object_size+0x3d/0x42f [ 67.271565][ T8517] netlink_sendmsg+0x8ae/0xd70 [ 67.276301][ T8517] ? netlink_unicast+0x720/0x720 [ 67.281211][ T8517] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 67.286729][ T8517] ? apparmor_socket_sendmsg+0x2a/0x30 [ 67.292160][ T8517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.298374][ T8517] ? security_socket_sendmsg+0x93/0xc0 [ 67.303808][ T8517] ? netlink_unicast+0x720/0x720 [ 67.308719][ T8517] sock_sendmsg+0x12e/0x170 [ 67.313195][ T8517] ___sys_sendmsg+0x81d/0x960 [ 67.317844][ T8517] ? copy_msghdr_from_user+0x430/0x430 [ 67.323279][ T8517] ? prep_transhuge_page+0xa0/0xa0 [ 67.328363][ T8517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.334577][ T8517] ? __handle_mm_fault+0x7cd/0x3ec0 [ 67.339751][ T8517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.345965][ T8517] ? __fget_light+0x1a9/0x230 [ 67.350617][ T8517] ? __fdget+0x1b/0x20 [ 67.354757][ T8517] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.360984][ T8517] __sys_sendmsg+0x105/0x1d0 [ 67.365551][ T8517] ? __ia32_sys_shutdown+0x80/0x80 [ 67.370652][ T8517] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.376083][ T8517] ? do_syscall_64+0x26/0x680 [ 67.380733][ T8517] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.386771][ T8517] ? do_syscall_64+0x26/0x680 [ 67.391418][ T8517] __x64_sys_sendmsg+0x78/0xb0 [ 67.396154][ T8517] do_syscall_64+0x103/0x680 [ 67.400724][ T8517] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.406586][ T8517] RIP: 0033:0x4401f9 [ 67.410468][ T8517] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.430045][ T8517] RSP: 002b:00007ffce875faa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.438425][ T8517] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 67.446392][ T8517] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 67.454344][ T8517] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.462288][ T8517] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80 [ 67.470231][ T8517] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 67.478189][ T8517] Modules linked in: [ 67.482138][ T8517] ---[ end trace 3bee47f081c674b7 ]--- [ 67.487611][ T8517] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 67.492873][ T8517] Code: ae 4c 02 00 e8 75 5d bf 05 58 5b 41 5c 41 5d 41 5e 5d c3 48 8d bb d0 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 24 44 8b ab d0 04 00 00 48 81 c3 [ 67.512475][ T8517] RSP: 0018:ffff888086267538 EFLAGS: 00010202 [ 67.518545][ T8517] RAX: dffffc0000000000 RBX: 0000000078e05280 RCX: 0000000000000000 [ 67.526518][ T8517] RDX: 000000000f1c0aea RSI: ffffffff815afbe6 RDI: 0000000078e05750 [ 67.534476][ T8517] RBP: ffff888086267560 R08: 0000000000000036 R09: ffffed1015d06011 [ 67.542451][ T8517] R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff888216427ba8 [ 67.550421][ T8517] R13: ffff88808e534300 R14: ffff888216426980 R15: ffff8880862675d8 [ 67.558399][ T8517] FS: 0000000000b40880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 67.567333][ T8517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.573889][ T8517] CR2: 0000000020000204 CR3: 0000000098123000 CR4: 00000000001406f0 [ 67.581862][ T8517] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.589834][ T8517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.597805][ T8517] Kernel panic - not syncing: Fatal exception [ 67.605209][ T8517] Kernel Offset: disabled [ 67.609547][ T8517] Rebooting in 86400 seconds..