[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 86.971151][ T27] audit: type=1800 audit(1579954237.891:25): pid=9532 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.010667][ T27] audit: type=1800 audit(1579954237.901:26): pid=9532 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.050276][ T27] audit: type=1800 audit(1579954237.901:27): pid=9532 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 '10.128.0.123' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 105.469674][ T9715] list_del corruption, ffff88809dd37400->prev is LIST_POISON2 (dead000000000122) [ 105.489875][ T9715] ------------[ cut here ]------------ [ 105.495507][ T9715] kernel BUG at lib/list_debug.c:48! [ 105.503342][ T9715] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 105.509800][ T9715] CPU: 0 PID: 9715 Comm: syz-executor027 Not tainted 5.5.0-rc6-syzkaller #0 [ 105.518576][ T9715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.528642][ T9715] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 105.535056][ T9715] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 60 82 71 88 e8 70 1d be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 c0 82 71 88 e8 5c 1d be fd <0f> 0b 4c 89 f6 48 c7 c7 80 83 71 88 e8 4b 1d be fd 0f 0b cc cc cc [ 105.554817][ T9715] RSP: 0018:ffffc9000626f478 EFLAGS: 00010282 [ 105.560875][ T9715] RAX: 000000000000004e RBX: ffff88809dd37400 RCX: 0000000000000000 [ 105.568841][ T9715] RDX: 0000000000000000 RSI: ffffffff815e5dd6 RDI: fffff52000c4de81 [ 105.576803][ T9715] RBP: ffffc9000626f490 R08: 000000000000004e R09: ffffed1015d06621 [ 105.584766][ T9715] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 105.592767][ T9715] R13: ffffffff8a4d8970 R14: ffff88809dd37400 R15: ffff88809f10dc80 [ 105.600737][ T9715] FS: 00007fa5b8ca9700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 105.609652][ T9715] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.616227][ T9715] CR2: 00007ffd3455efb8 CR3: 00000000a454e000 CR4: 00000000001406f0 [ 105.624364][ T9715] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 105.632788][ T9715] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 105.640850][ T9715] Call Trace: [ 105.644152][ T9715] __nf_tables_abort+0x1e53/0x2a50 [ 105.649267][ T9715] ? nfnl_err_del+0x115/0x170 [ 105.653943][ T9715] nf_tables_abort+0x17/0x30 [ 105.658519][ T9715] nfnetlink_rcv_batch+0xa5d/0x17a0 [ 105.663788][ T9715] ? nf_tables_delobj+0x8f0/0x8f0 [ 105.668798][ T9715] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 105.674597][ T9715] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.680828][ T9715] ? apparmor_capable+0x497/0x900 [ 105.685948][ T9715] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.692173][ T9715] ? __nla_validate_parse+0x2d0/0x1ee0 [ 105.697727][ T9715] ? cap_capable+0x205/0x270 [ 105.702308][ T9715] ? nla_memcpy+0xb0/0xb0 [ 105.706634][ T9715] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.712987][ T9715] ? ns_capable_common+0x93/0x100 [ 105.718167][ T9715] ? __nla_parse+0x43/0x60 [ 105.722581][ T9715] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 105.728298][ T9715] nfnetlink_rcv+0x3e7/0x460 [ 105.732985][ T9715] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 105.738547][ T9715] ? netlink_deliver_tap+0x24a/0xbf0 [ 105.743850][ T9715] ? __kasan_check_write+0x14/0x20 [ 105.748954][ T9715] netlink_unicast+0x59e/0x7e0 [ 105.753699][ T9715] ? netlink_attachskb+0x870/0x870 [ 105.758799][ T9715] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 105.764506][ T9715] ? __check_object_size+0x3d/0x437 [ 105.769820][ T9715] netlink_sendmsg+0x91c/0xea0 [ 105.774572][ T9715] ? netlink_unicast+0x7e0/0x7e0 [ 105.779540][ T9715] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 105.785264][ T9715] ? apparmor_socket_sendmsg+0x2a/0x30 [ 105.790765][ T9715] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.797008][ T9715] ? security_socket_sendmsg+0x8d/0xc0 [ 105.802580][ T9715] ? netlink_unicast+0x7e0/0x7e0 [ 105.807504][ T9715] sock_sendmsg+0xd7/0x130 [ 105.812056][ T9715] ____sys_sendmsg+0x753/0x880 [ 105.816911][ T9715] ? kernel_sendmsg+0x50/0x50 [ 105.821575][ T9715] ? __fget+0x35d/0x550 [ 105.825721][ T9715] ? find_held_lock+0x35/0x130 [ 105.830541][ T9715] ___sys_sendmsg+0x100/0x170 [ 105.835203][ T9715] ? sendmsg_copy_msghdr+0x70/0x70 [ 105.840303][ T9715] ? __kasan_check_read+0x11/0x20 [ 105.845323][ T9715] ? ksys_dup3+0x3e0/0x3e0 [ 105.849864][ T9715] ? __fget_light+0x1a9/0x230 [ 105.854692][ T9715] ? __fdget+0x1b/0x20 [ 105.858748][ T9715] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.864993][ T9715] __sys_sendmsg+0x105/0x1d0 [ 105.869579][ T9715] ? __sys_sendmsg_sock+0xc0/0xc0 [ 105.874791][ T9715] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 105.880811][ T9715] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.886287][ T9715] ? do_syscall_64+0x26/0x790 [ 105.890960][ T9715] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.897025][ T9715] ? do_syscall_64+0x26/0x790 [ 105.901700][ T9715] __x64_sys_sendmsg+0x78/0xb0 [ 105.906469][ T9715] do_syscall_64+0xfa/0x790 [ 105.910966][ T9715] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.916845][ T9715] RIP: 0033:0x447d39 [ 105.920737][ T9715] Code: e8 dc e6 ff ff 48 83 c4 18 c3 0f 1f 80 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 0f 83 2b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 105.940327][ T9715] RSP: 002b:00007fa5b8ca8ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 105.948846][ T9715] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 0000000000447d39 [ 105.956815][ T9715] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 105.964940][ T9715] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 105.972906][ T9715] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c [ 105.981031][ T9715] R13: 00007ffdb880f9df R14: 00007fa5b8ca99c0 R15: 20c49ba5e353f7cf [ 105.988991][ T9715] Modules linked in: [ 105.993862][ T9715] ---[ end trace 13c137c24efd96e6 ]--- [ 105.999486][ T9715] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 106.006016][ T9715] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 60 82 71 88 e8 70 1d be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 c0 82 71 88 e8 5c 1d be fd <0f> 0b 4c 89 f6 48 c7 c7 80 83 71 88 e8 4b 1d be fd 0f 0b cc cc cc [ 106.025747][ T9715] RSP: 0018:ffffc9000626f478 EFLAGS: 00010282 [ 106.031832][ T9715] RAX: 000000000000004e RBX: ffff88809dd37400 RCX: 0000000000000000 [ 106.040018][ T9715] RDX: 0000000000000000 RSI: ffffffff815e5dd6 RDI: fffff52000c4de81 [ 106.048049][ T9715] RBP: ffffc9000626f490 R08: 000000000000004e R09: ffffed1015d06621 [ 106.056098][ T9715] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 106.064259][ T9715] R13: ffffffff8a4d8970 R14: ffff88809dd37400 R15: ffff88809f10dc80 [ 106.072244][ T9715] FS: 00007fa5b8ca9700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 106.081222][ T9715] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.087829][ T9715] CR2: 00007ffd3455efb8 CR3: 00000000a454e000 CR4: 00000000001406f0 [ 106.095844][ T9715] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.104401][ T9715] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.112574][ T9715] Kernel panic - not syncing: Fatal exception [ 106.120441][ T9715] Kernel Offset: disabled [ 106.124913][ T9715] Rebooting in 86400 seconds..