[ 40.732872] audit: type=1800 audit(1546837348.848:25): pid=7922 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.760947] audit: type=1800 audit(1546837348.848:26): pid=7922 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.789890] audit: type=1800 audit(1546837348.848:27): pid=7922 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. [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.214' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.554989] ------------[ cut here ]------------ [ 51.559872] kernel BUG at net/core/skbuff.c:1459! [ 51.565059] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 51.570424] CPU: 1 PID: 8097 Comm: syz-executor904 Not tainted 4.20.0+ #10 [ 51.577427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.586786] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 51.591784] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 26 da 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 17 da 68 fb 0f 0b e8 10 da 68 fb <0f> 0b e8 09 da 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 51.610667] RSP: 0018:ffff88808757f5e0 EFLAGS: 00010293 [ 51.616028] RAX: ffff8880a8764140 RBX: ffff8880996e76c0 RCX: ffffffff86191108 [ 51.623289] RDX: 0000000000000000 RSI: ffffffff86191b40 RDI: 0000000000000005 [ 51.630548] RBP: ffff88808757f720 R08: ffff8880a8764140 R09: ffffed10132dcef3 [ 51.637800] R10: ffffed10132dcef2 R11: ffff8880996e7797 R12: ffff8880996e777c [ 51.645063] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 51.652324] FS: 00007f10db1d9700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 51.660567] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.666431] CR2: 0000000020000300 CR3: 000000008f50d000 CR4: 00000000001406e0 [ 51.673705] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.680971] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.688227] Call Trace: [ 51.690800] ? lock_acquire+0x1db/0x570 [ 51.694774] ? lock_downgrade+0x910/0x910 [ 51.698902] ? skb_release_data+0x970/0x970 [ 51.703260] ? lockdep_hardirqs_on+0x415/0x5d0 [ 51.707832] __pskb_pull_tail+0x13a/0x1740 [ 51.712052] ? _copy_to_iter+0x3a1/0x1400 [ 51.716190] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 51.721275] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.726792] ? __skb_try_recv_datagram+0x448/0x5b0 [ 51.731704] ? pskb_carve+0x1e20/0x1e20 [ 51.735662] ? __check_object_size+0xa3/0x77a [ 51.740141] ? iov_iter_copy_from_user_atomic+0xff0/0xff0 [ 51.745658] ? usercopy_warn+0x110/0x110 [ 51.749698] ? ___might_sleep+0x1e7/0x310 [ 51.753827] ? arch_local_save_flags+0x50/0x50 [ 51.758391] ? __fget+0x472/0x710 [ 51.761827] ip6_datagram_recv_specific_ctl+0x1751/0x1bd0 [ 51.767378] ? ip6_datagram_recv_common_ctl+0x5e0/0x5e0 [ 51.772742] ? skb_kill_datagram+0x130/0x130 [ 51.777164] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 51.782678] ? ip6_datagram_recv_common_ctl+0x37b/0x5e0 [ 51.788019] ? skb_copy_datagram_iter+0x10d/0x490 [ 51.792842] ? ipv6_recv_rxpmtu+0x920/0x920 [ 51.797145] ? skb_copy_and_hash_datagram_iter+0x50/0x50 [ 51.802575] ip6_datagram_recv_ctl+0x34/0x40 [ 51.806968] rawv6_recvmsg+0xc43/0xe90 [ 51.810838] ? aa_sk_perm+0x234/0x8e0 [ 51.814640] ? rawv6_rcv_skb+0x470/0x470 [ 51.818702] ? __fget_light+0x2db/0x420 [ 51.822657] sock_common_recvmsg+0x13f/0x2b0 [ 51.827045] ? compat_sock_common_getsockopt+0x150/0x150 [ 51.832473] ? apparmor_socket_recvmsg+0x2a/0x30 [ 51.837210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.842736] ? security_socket_recvmsg+0x9b/0xd0 [ 51.847474] ? compat_sock_common_getsockopt+0x150/0x150 [ 51.852904] sock_recvmsg+0xd0/0x110 [ 51.856600] __sys_recvfrom+0x30b/0x5d0 [ 51.860556] ? __ia32_sys_send+0x100/0x100 [ 51.864776] ? __sys_sendmsg+0x1a3/0x270 [ 51.868821] ? do_syscall_64+0x8c/0x800 [ 51.872776] ? do_syscall_64+0x8c/0x800 [ 51.876744] ? lockdep_hardirqs_on+0x415/0x5d0 [ 51.881309] ? trace_hardirqs_on+0xbd/0x310 [ 51.885609] ? do_futex+0x2910/0x2910 [ 51.889570] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.894933] ? trace_hardirqs_off_caller+0x300/0x300 [ 51.900018] __x64_sys_recvfrom+0xe1/0x1a0 [ 51.904241] do_syscall_64+0x1a3/0x800 [ 51.908110] ? syscall_return_slowpath+0x5f0/0x5f0 [ 51.913042] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 51.918041] ? __switch_to_asm+0x34/0x70 [ 51.922081] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.926960] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.932130] RIP: 0033:0x445809 [ 51.935303] Code: e8 6c b6 02 00 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 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 51.954192] RSP: 002b:00007f10db1d8da8 EFLAGS: 00000216 ORIG_RAX: 000000000000002d [ 51.961890] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445809 [ 51.969151] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 51.976400] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 51.983648] R10: 0000000000000002 R11: 0000000000000216 R12: 00000000006dac3c [ 51.990911] R13: 00007ffdb1c9d3af R14: 00007f10db1d99c0 R15: 00000000006dad2c [ 51.998166] Modules linked in: [ 52.001773] ---[ end trace 8959f8454d60a581 ]--- [ 52.006598] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 52.011600] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 26 da 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 17 da 68 fb 0f 0b e8 10 da 68 fb <0f> 0b e8 09 da 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 52.030718] RSP: 0018:ffff88808757f5e0 EFLAGS: 00010293 [ 52.036097] RAX: ffff8880a8764140 RBX: ffff8880996e76c0 RCX: ffffffff86191108 [ 52.043363] RDX: 0000000000000000 RSI: ffffffff86191b40 RDI: 0000000000000005 [ 52.050665] RBP: ffff88808757f720 R08: ffff8880a8764140 R09: ffffed10132dcef3 [ 52.057953] R10: ffffed10132dcef2 R11: ffff8880996e7797 R12: ffff8880996e777c [ 52.065255] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 52.072530] FS: 00007f10db1d9700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 52.080770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.086669] CR2: 0000000020000300 CR3: 000000008f50d000 CR4: 00000000001406e0 [ 52.093971] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.101245] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.108533] Kernel panic - not syncing: Fatal exception [ 52.114879] Kernel Offset: disabled [ 52.118500] Rebooting in 86400 seconds..