[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.285732][ T27] audit: type=1800 audit(1578347383.416:25): pid=9428 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.334018][ T27] audit: type=1800 audit(1578347383.426:26): pid=9428 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.376863][ T27] audit: type=1800 audit(1578347383.426:27): pid=9428 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.732487][ T9584] netlink: 'syz-executor272': attribute type 3 has an invalid length. [ 95.740943][ T9584] netlink: 'syz-executor272': attribute type 3 has an invalid length. [ 95.749185][ T9584] netlink: 'syz-executor272': attribute type 2 has an invalid length. [ 95.757592][ T9584] netlink: 24 bytes leftover after parsing attributes in process `syz-executor272'. [ 95.767115][ T9584] kasan: CONFIG_KASAN_INLINE enabled [ 95.772547][ T9584] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 95.780656][ T9584] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 95.787593][ T9584] CPU: 1 PID: 9584 Comm: syz-executor272 Not tainted 5.5.0-rc4-syzkaller #0 [ 95.796240][ T9584] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.806291][ T9584] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 95.812708][ T9584] Code: 89 d8 48 c1 e8 03 42 0f b6 14 30 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a1 01 00 00 4c 89 e0 44 8b 3b 48 c1 e8 03 <42> 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 95.832297][ T9584] RSP: 0018:ffffc90001dc73d8 EFLAGS: 00010246 [ 95.838354][ T9584] RAX: 0000000000000000 RBX: ffffffff8a4d067c RCX: ffffffff8666e6a9 [ 95.846306][ T9584] RDX: 0000000000000000 RSI: ffffffff8664da95 RDI: ffff88809281cd80 [ 95.854280][ T9584] RBP: ffffc90001dc7418 R08: ffff88808c9e41c0 R09: ffff88809281cd80 [ 95.862233][ T9584] R10: ffffed10125039b7 R11: ffff88809281cdbf R12: 0000000000000000 [ 95.870184][ T9584] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 95.878140][ T9584] FS: 00000000012f6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 95.887135][ T9584] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.893697][ T9584] CR2: 0000000020000200 CR3: 00000000932f8000 CR4: 00000000001406e0 [ 95.901650][ T9584] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.909603][ T9584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.917570][ T9584] Call Trace: [ 95.920860][ T9584] ctnl_timeout_parse_policy+0x150/0x1d0 [ 95.926487][ T9584] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 95.932392][ T9584] cttimeout_default_set+0x150/0x1c0 [ 95.937675][ T9584] ? ctnl_timeout_parse_policy+0x1d0/0x1d0 [ 95.943475][ T9584] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 95.948511][ T9584] ? nfnetlink_bind+0x2c0/0x2c0 [ 95.953439][ T9584] ? __kasan_check_read+0x11/0x20 [ 95.958448][ T9584] ? __lock_acquire+0x8a0/0x4a00 [ 95.963365][ T9584] ? save_stack+0x5c/0x90 [ 95.967675][ T9584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.973911][ T9584] ? apparmor_capable+0x497/0x900 [ 95.978916][ T9584] ? __kasan_check_read+0x11/0x20 [ 95.983920][ T9584] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 95.989360][ T9584] netlink_rcv_skb+0x177/0x450 [ 95.994118][ T9584] ? nfnetlink_bind+0x2c0/0x2c0 [ 96.000030][ T9584] ? netlink_ack+0xb50/0xb50 [ 96.004621][ T9584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.010845][ T9584] ? ns_capable_common+0x93/0x100 [ 96.015848][ T9584] ? ns_capable+0x20/0x30 [ 96.020267][ T9584] ? __netlink_ns_capable+0x104/0x140 [ 96.025728][ T9584] nfnetlink_rcv+0x1ba/0x460 [ 96.030303][ T9584] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 96.035753][ T9584] ? netlink_deliver_tap+0x24a/0xbe0 [ 96.041019][ T9584] ? __kasan_check_write+0x14/0x20 [ 96.046125][ T9584] netlink_unicast+0x58c/0x7d0 [ 96.050870][ T9584] ? netlink_attachskb+0x870/0x870 [ 96.055970][ T9584] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 96.061826][ T9584] ? __check_object_size+0x3d/0x437 [ 96.067027][ T9584] netlink_sendmsg+0x91c/0xea0 [ 96.071794][ T9584] ? netlink_unicast+0x7d0/0x7d0 [ 96.076711][ T9584] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 96.082368][ T9584] ? apparmor_socket_sendmsg+0x2a/0x30 [ 96.087823][ T9584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.094065][ T9584] ? security_socket_sendmsg+0x8d/0xc0 [ 96.099658][ T9584] ? netlink_unicast+0x7d0/0x7d0 [ 96.104588][ T9584] sock_sendmsg+0xd7/0x130 [ 96.109006][ T9584] ____sys_sendmsg+0x753/0x880 [ 96.113757][ T9584] ? kernel_sendmsg+0x50/0x50 [ 96.118420][ T9584] ? mark_held_locks+0xa4/0xf0 [ 96.123189][ T9584] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 96.129425][ T9584] ? __handle_mm_fault+0x3145/0x3cc0 [ 96.134694][ T9584] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 96.140754][ T9584] ___sys_sendmsg+0x100/0x170 [ 96.145414][ T9584] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 96.151393][ T9584] ? sendmsg_copy_msghdr+0x70/0x70 [ 96.156503][ T9584] ? __do_page_fault+0x56a/0xd80 [ 96.161434][ T9584] ? find_held_lock+0x35/0x130 [ 96.166179][ T9584] ? __do_page_fault+0x56a/0xd80 [ 96.171267][ T9584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.177528][ T9584] ? __fget_light+0x1a9/0x230 [ 96.182186][ T9584] ? __fdget+0x1b/0x20 [ 96.186260][ T9584] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.192501][ T9584] __sys_sendmsg+0x105/0x1d0 [ 96.197089][ T9584] ? __sys_sendmsg_sock+0xc0/0xc0 [ 96.202134][ T9584] ? down_read_non_owner+0x490/0x490 [ 96.207411][ T9584] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.212867][ T9584] ? do_syscall_64+0x26/0x790 [ 96.217531][ T9584] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.223593][ T9584] ? do_syscall_64+0x26/0x790 [ 96.228256][ T9584] __x64_sys_sendmsg+0x78/0xb0 [ 96.233006][ T9584] do_syscall_64+0xfa/0x790 [ 96.237491][ T9584] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.243374][ T9584] RIP: 0033:0x4401e9 [ 96.247250][ T9584] 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 [ 96.266997][ T9584] RSP: 002b:00007ffffcb976f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.275390][ T9584] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 96.283347][ T9584] RDX: 0000000000000940 RSI: 0000000020000200 RDI: 0000000000000003 [ 96.291309][ T9584] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 96.299259][ T9584] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 96.307222][ T9584] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 96.315181][ T9584] Modules linked in: [ 96.319312][ T9584] ---[ end trace 37dbd093beed37ef ]--- [ 96.324781][ T9584] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 96.331378][ T9584] Code: 89 d8 48 c1 e8 03 42 0f b6 14 30 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a1 01 00 00 4c 89 e0 44 8b 3b 48 c1 e8 03 <42> 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 96.351308][ T9584] RSP: 0018:ffffc90001dc73d8 EFLAGS: 00010246 [ 96.357385][ T9584] RAX: 0000000000000000 RBX: ffffffff8a4d067c RCX: ffffffff8666e6a9 [ 96.365338][ T9584] RDX: 0000000000000000 RSI: ffffffff8664da95 RDI: ffff88809281cd80 [ 96.373411][ T9584] RBP: ffffc90001dc7418 R08: ffff88808c9e41c0 R09: ffff88809281cd80 [ 96.381411][ T9584] R10: ffffed10125039b7 R11: ffff88809281cdbf R12: 0000000000000000 [ 96.389426][ T9584] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 96.397438][ T9584] FS: 00000000012f6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 96.406506][ T9584] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.413177][ T9584] CR2: 0000000020000200 CR3: 00000000932f8000 CR4: 00000000001406e0 [ 96.421181][ T9584] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.429227][ T9584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.437265][ T9584] Kernel panic - not syncing: Fatal exception [ 96.444607][ T9584] Kernel Offset: disabled [ 96.448953][ T9584] Rebooting in 86400 seconds..