[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.541408][ T27] audit: type=1800 audit(1558392689.031:25): pid=8949 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.580738][ T27] audit: type=1800 audit(1558392689.031:26): pid=8949 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.640712][ T27] audit: type=1800 audit(1558392689.041:27): pid=8949 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 '10.128.0.232' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.165365][ T9104] BUG: spinlock bad magic on CPU#0, syz-executor384/9104 [ 87.173064][ T9104] kasan: CONFIG_KASAN_INLINE enabled [ 87.178582][ T9104] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 87.187329][ T9104] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 87.194280][ T9104] CPU: 0 PID: 9104 Comm: syz-executor384 Not tainted 5.2.0-rc1+ #1 [ 87.203277][ T9104] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.217999][ T9104] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 87.223516][ T9104] Code: 4e 4d 02 00 e8 c5 52 bd 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 [ 87.244342][ T9104] RSP: 0018:ffff888085c77538 EFLAGS: 00010203 [ 87.250577][ T9104] RAX: dffffc0000000000 RBX: 000000000ab1cf7e RCX: 0000000000000000 [ 87.258769][ T9104] RDX: 0000000001563a89 RSI: ffffffff815ac7e6 RDI: 000000000ab1d44e [ 87.267025][ T9104] RBP: ffff888085c77560 R08: 0000000000000036 R09: ffffed1015d06011 [ 87.275209][ T9104] R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff88821656f828 [ 87.283693][ T9104] R13: ffff8880a4626000 R14: ffff88821656e600 R15: ffff888085c775d8 [ 87.291662][ T9104] FS: 0000555557135880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 87.300698][ T9104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.307699][ T9104] CR2: 0000000020000040 CR3: 00000000906cc000 CR4: 00000000001406f0 [ 87.315852][ T9104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.323891][ T9104] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.332192][ T9104] Call Trace: [ 87.335486][ T9104] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.342484][ T9104] do_raw_spin_lock+0x231/0x2e0 [ 87.347591][ T9104] ? rwlock_bug.part.0+0x90/0x90 [ 87.352512][ T9104] ? lock_acquire+0x16f/0x3f0 [ 87.357729][ T9104] ? rhashtable_walk_enter+0xf9/0x390 [ 87.363135][ T9104] _raw_spin_lock+0x37/0x40 [ 87.367637][ T9104] ? rhashtable_walk_enter+0xf9/0x390 [ 87.373056][ T9104] rhashtable_walk_enter+0xf9/0x390 [ 87.378368][ T9104] __tipc_dump_start+0x1fa/0x3c0 [ 87.383415][ T9104] tipc_dump_start+0x70/0x90 [ 87.388103][ T9104] __netlink_dump_start+0x4f8/0x7d0 [ 87.393425][ T9104] ? __tipc_dump_start+0x3c0/0x3c0 [ 87.398637][ T9104] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 87.404473][ T9104] ? __tipc_diag_gen_cookie+0x90/0x90 [ 87.411106][ T9104] ? sock_diag_rcv+0x1c/0x40 [ 87.416136][ T9104] ? __tipc_dump_start+0x3c0/0x3c0 [ 87.421249][ T9104] ? tipc_unregister_sysctl+0x20/0x20 [ 87.426615][ T9104] ? tipc_ioctl+0x2e0/0x2e0 [ 87.431337][ T9104] sock_diag_rcv_msg+0x319/0x410 [ 87.436269][ T9104] netlink_rcv_skb+0x177/0x450 [ 87.441300][ T9104] ? sock_diag_bind+0x80/0x80 [ 87.446159][ T9104] ? netlink_ack+0xb50/0xb50 [ 87.450760][ T9104] ? kasan_check_read+0x11/0x20 [ 87.455858][ T9104] ? netlink_deliver_tap+0x254/0xbf0 [ 87.461318][ T9104] sock_diag_rcv+0x2b/0x40 [ 87.465859][ T9104] netlink_unicast+0x531/0x710 [ 87.470627][ T9104] ? netlink_attachskb+0x770/0x770 [ 87.475884][ T9104] ? _copy_from_iter_full+0x25d/0x8c0 [ 87.481361][ T9104] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 87.487079][ T9104] ? __check_object_size+0x3d/0x42f [ 87.492447][ T9104] netlink_sendmsg+0x8ae/0xd70 [ 87.497341][ T9104] ? netlink_unicast+0x710/0x710 [ 87.502488][ T9104] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 87.508219][ T9104] ? apparmor_socket_sendmsg+0x2a/0x30 [ 87.513815][ T9104] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.520160][ T9104] ? security_socket_sendmsg+0x8d/0xc0 [ 87.525615][ T9104] ? netlink_unicast+0x710/0x710 [ 87.530993][ T9104] sock_sendmsg+0xd7/0x130 [ 87.535862][ T9104] ___sys_sendmsg+0x803/0x920 [ 87.541194][ T9104] ? copy_msghdr_from_user+0x430/0x430 [ 87.546778][ T9104] ? prep_transhuge_page+0xa0/0xa0 [ 87.552123][ T9104] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.558371][ T9104] ? __handle_mm_fault+0x7cb/0x3eb0 [ 87.564444][ T9104] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.570871][ T9104] ? __fget_light+0x1a9/0x230 [ 87.575939][ T9104] ? __fdget+0x1b/0x20 [ 87.580010][ T9104] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 87.586389][ T9104] __sys_sendmsg+0x105/0x1d0 [ 87.591182][ T9104] ? __ia32_sys_shutdown+0x80/0x80 [ 87.596375][ T9104] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 87.602129][ T9104] ? do_syscall_64+0x26/0x680 [ 87.606965][ T9104] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.613053][ T9104] ? do_syscall_64+0x26/0x680 [ 87.617870][ T9104] __x64_sys_sendmsg+0x78/0xb0 [ 87.622631][ T9104] do_syscall_64+0xfd/0x680 [ 87.627431][ T9104] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.633515][ T9104] RIP: 0033:0x440219 [ 87.637887][ T9104] 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 [ 87.658738][ T9104] RSP: 002b:00007ffe67a46f28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.667243][ T9104] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 87.675651][ T9104] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 87.684026][ T9104] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 87.692385][ T9104] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 87.700759][ T9104] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 87.708833][ T9104] Modules linked in: [ 87.713092][ T9104] ---[ end trace df30227295919165 ]--- [ 87.718911][ T9104] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 87.724226][ T9104] Code: 4e 4d 02 00 e8 c5 52 bd 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 [ 87.743970][ T9104] RSP: 0018:ffff888085c77538 EFLAGS: 00010203 [ 87.750474][ T9104] RAX: dffffc0000000000 RBX: 000000000ab1cf7e RCX: 0000000000000000 [ 87.759176][ T9104] RDX: 0000000001563a89 RSI: ffffffff815ac7e6 RDI: 000000000ab1d44e [ 87.768372][ T9104] RBP: ffff888085c77560 R08: 0000000000000036 R09: ffffed1015d06011 [ 87.776779][ T9104] R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff88821656f828 [ 87.784913][ T9104] R13: ffff8880a4626000 R14: ffff88821656e600 R15: ffff888085c775d8 [ 87.793731][ T9104] FS: 0000555557135880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 87.803340][ T9104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.810152][ T9104] CR2: 0000000020000040 CR3: 00000000906cc000 CR4: 00000000001406f0 [ 87.818576][ T9104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.827253][ T9104] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.835664][ T9104] Kernel panic - not syncing: Fatal exception [ 87.842590][ T9104] Kernel Offset: disabled [ 87.847017][ T9104] Rebooting in 86400 seconds..