[ 72.279064][ T27] audit: type=1800 audit(1578384420.362:24): pid=9597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.114288][ T27] audit: type=1800 audit(1578384421.302:25): pid=9597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.148764][ T27] audit: type=1800 audit(1578384421.302:26): pid=9597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.0.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.045757][ T9748] netlink: 'syz-executor401': attribute type 3 has an invalid length. [ 83.054331][ T9748] netlink: 'syz-executor401': attribute type 3 has an invalid length. [ 83.062538][ T9748] netlink: 'syz-executor401': attribute type 2 has an invalid length. [ 83.071400][ T9748] netlink: 24 bytes leftover after parsing attributes in process `syz-executor401'. [ 83.080929][ T9748] kasan: CONFIG_KASAN_INLINE enabled [ 83.086371][ T9748] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 83.095063][ T9748] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 83.102127][ T9748] CPU: 0 PID: 9748 Comm: syz-executor401 Not tainted 5.5.0-rc5-syzkaller #0 [ 83.111094][ T9748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.121156][ T9748] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 83.129406][ T9748] 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 [ 83.149036][ T9748] RSP: 0018:ffffc90001de73c8 EFLAGS: 00010246 [ 83.155102][ T9748] RAX: 0000000000000000 RBX: ffffffff8a4cd73c RCX: ffffffff866323f9 [ 83.163161][ T9748] RDX: 0000000000000000 RSI: ffffffff866117e5 RDI: ffff8880a0ae8a80 [ 83.171126][ T9748] RBP: ffffc90001de7408 R08: ffff88809a246180 R09: ffff8880a0ae8a80 [ 83.179087][ T9748] R10: ffffed101415d157 R11: ffff8880a0ae8abf R12: 0000000000000000 [ 83.187238][ T9748] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 83.195218][ T9748] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:0000000008bbf840 [ 83.204134][ T9748] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 83.210789][ T9748] CR2: 0000000020000200 CR3: 0000000095a6e000 CR4: 00000000001406f0 [ 83.218772][ T9748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.226731][ T9748] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.234696][ T9748] Call Trace: [ 83.237986][ T9748] ctnl_timeout_parse_policy+0x150/0x1d0 [ 83.243630][ T9748] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 83.249505][ T9748] cttimeout_default_set+0x150/0x1c0 [ 83.254769][ T9748] ? ctnl_timeout_parse_policy+0x1d0/0x1d0 [ 83.260564][ T9748] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 83.265486][ T9748] ? nfnetlink_bind+0x2c0/0x2c0 [ 83.270335][ T9748] ? __kasan_check_read+0x11/0x20 [ 83.275336][ T9748] ? __lock_acquire+0x8a0/0x4a00 [ 83.280285][ T9748] ? save_stack+0x5c/0x90 [ 83.284610][ T9748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.290850][ T9748] ? apparmor_capable+0x497/0x900 [ 83.295870][ T9748] ? __kasan_check_read+0x11/0x20 [ 83.300896][ T9748] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 83.306386][ T9748] netlink_rcv_skb+0x177/0x450 [ 83.311150][ T9748] ? nfnetlink_bind+0x2c0/0x2c0 [ 83.316101][ T9748] ? netlink_ack+0xb50/0xb50 [ 83.322248][ T9748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.328649][ T9748] ? ns_capable_common+0x93/0x100 [ 83.333669][ T9748] ? ns_capable+0x20/0x30 [ 83.337994][ T9748] ? __netlink_ns_capable+0x104/0x140 [ 83.343372][ T9748] nfnetlink_rcv+0x1ba/0x460 [ 83.347968][ T9748] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 83.353513][ T9748] ? netlink_deliver_tap+0x24a/0xbe0 [ 83.358842][ T9748] ? __kasan_check_write+0x14/0x20 [ 83.363959][ T9748] netlink_unicast+0x58c/0x7d0 [ 83.368708][ T9748] ? netlink_attachskb+0x870/0x870 [ 83.373814][ T9748] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 83.379531][ T9748] ? __check_object_size+0x3d/0x437 [ 83.384731][ T9748] netlink_sendmsg+0x91c/0xea0 [ 83.389653][ T9748] ? netlink_unicast+0x7d0/0x7d0 [ 83.394580][ T9748] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 83.400189][ T9748] ? apparmor_socket_sendmsg+0x2a/0x30 [ 83.405793][ T9748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.412120][ T9748] ? security_socket_sendmsg+0x8d/0xc0 [ 83.417565][ T9748] ? netlink_unicast+0x7d0/0x7d0 [ 83.422487][ T9748] sock_sendmsg+0xd7/0x130 [ 83.426895][ T9748] ____sys_sendmsg+0x753/0x880 [ 83.431659][ T9748] ? kernel_sendmsg+0x50/0x50 [ 83.436408][ T9748] ? mark_held_locks+0xa4/0xf0 [ 83.441155][ T9748] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 83.447204][ T9748] ___sys_sendmsg+0x100/0x170 [ 83.451875][ T9748] ? sendmsg_copy_msghdr+0x70/0x70 [ 83.456966][ T9748] ? prep_transhuge_page+0xa0/0xa0 [ 83.462074][ T9748] ? __do_page_fault+0x56a/0xd80 [ 83.467177][ T9748] ? find_held_lock+0x35/0x130 [ 83.471935][ T9748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.478648][ T9748] ? __fget_light+0x1a9/0x230 [ 83.483442][ T9748] ? __fdget+0x1b/0x20 [ 83.487513][ T9748] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.493756][ T9748] __sys_sendmsg+0x105/0x1d0 [ 83.498339][ T9748] ? __sys_sendmsg_sock+0xc0/0xc0 [ 83.503412][ T9748] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.508890][ T9748] ? do_fast_syscall_32+0xd1/0xe16 [ 83.514023][ T9748] ? entry_SYSENTER_compat+0x70/0x7f [ 83.519298][ T9748] ? do_fast_syscall_32+0xd1/0xe16 [ 83.524395][ T9748] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 83.529854][ T9748] do_fast_syscall_32+0x27b/0xe16 [ 83.534947][ T9748] entry_SYSENTER_compat+0x70/0x7f [ 83.540049][ T9748] RIP: 0023:0xf7fc5a39 [ 83.544109][ T9748] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 83.564865][ T9748] RSP: 002b:00000000ffeb6cac EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 83.573267][ T9748] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000200 [ 83.581319][ T9748] RDX: 0000000000000940 RSI: 00000000080ea00c RDI: 0000000000000000 [ 83.589311][ T9748] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 83.597273][ T9748] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 83.605240][ T9748] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 83.613283][ T9748] Modules linked in: [ 83.617629][ T9748] ---[ end trace 9592fc0bf2e45674 ]--- [ 83.623193][ T9748] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 83.629631][ T9748] 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 [ 83.649346][ T9748] RSP: 0018:ffffc90001de73c8 EFLAGS: 00010246 [ 83.655398][ T9748] RAX: 0000000000000000 RBX: ffffffff8a4cd73c RCX: ffffffff866323f9 [ 83.663703][ T9748] RDX: 0000000000000000 RSI: ffffffff866117e5 RDI: ffff8880a0ae8a80 [ 83.671792][ T9748] RBP: ffffc90001de7408 R08: ffff88809a246180 R09: ffff8880a0ae8a80 [ 83.679785][ T9748] R10: ffffed101415d157 R11: ffff8880a0ae8abf R12: 0000000000000000 [ 83.687751][ T9748] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 83.695750][ T9748] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:0000000008bbf840 [ 83.704703][ T9748] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 83.711465][ T9748] CR2: 0000000020000200 CR3: 0000000095a6e000 CR4: 00000000001406f0 [ 83.719565][ T9748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.727529][ T9748] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.735643][ T9748] Kernel panic - not syncing: Fatal exception [ 83.743332][ T9748] Kernel Offset: disabled [ 83.747675][ T9748] Rebooting in 86400 seconds..