[ 35.492336] audit: type=1800 audit(1546837315.674:27): pid=7505 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.514906] audit: type=1800 audit(1546837315.674:28): pid=7505 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 36.139967] audit: type=1800 audit(1546837316.384:29): pid=7505 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 36.158432] audit: type=1800 audit(1546837316.384:30): pid=7505 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.600804] ------------[ cut here ]------------ [ 46.605664] kernel BUG at net/core/skbuff.c:1459! [ 46.610671] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 46.616034] CPU: 1 PID: 7659 Comm: syz-executor477 Not tainted 4.20.0+ #13 [ 46.623021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.632365] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 46.637359] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 a6 ca 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 97 ca 68 fb 0f 0b e8 90 ca 68 fb <0f> 0b e8 89 ca 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 46.656236] RSP: 0018:ffff888081d7f5e0 EFLAGS: 00010293 [ 46.661575] RAX: ffff8880a936a1c0 RBX: ffff88808f2ee480 RCX: ffffffff86192268 [ 46.668838] RDX: 0000000000000000 RSI: ffffffff86192ca0 RDI: 0000000000000005 [ 46.676095] RBP: ffff888081d7f720 R08: ffff8880a936a1c0 R09: ffffed1011e5dcab [ 46.683341] R10: ffffed1011e5dcaa R11: ffff88808f2ee557 R12: ffff88808f2ee53c [ 46.690592] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 46.697845] FS: 00007fa4f1d91700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 46.706051] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.711906] CR2: 0000000020000300 CR3: 00000000a831f000 CR4: 00000000001406e0 [ 46.719156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.726406] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.733654] Call Trace: [ 46.736226] ? lock_acquire+0x1db/0x570 [ 46.740197] ? lock_downgrade+0x910/0x910 [ 46.744332] ? skb_release_data+0x970/0x970 [ 46.748634] ? lockdep_hardirqs_on+0x415/0x5d0 [ 46.753210] __pskb_pull_tail+0x13a/0x1740 [ 46.757426] ? _copy_to_iter+0x3a1/0x1400 [ 46.761563] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 46.766646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.772159] ? __skb_try_recv_datagram+0x448/0x5b0 [ 46.777066] ? pskb_carve+0x1e20/0x1e20 [ 46.781018] ? __check_object_size+0xa3/0x77a [ 46.785491] ? iov_iter_copy_from_user_atomic+0xff0/0xff0 [ 46.791000] ? usercopy_warn+0x110/0x110 [ 46.795032] ? ___might_sleep+0x1e7/0x310 [ 46.799186] ? arch_local_save_flags+0x50/0x50 [ 46.803755] ? __fget+0x472/0x710 [ 46.807192] ip6_datagram_recv_specific_ctl+0x1751/0x1bd0 [ 46.812709] ? ip6_datagram_recv_common_ctl+0x5e0/0x5e0 [ 46.818065] ? skb_kill_datagram+0x130/0x130 [ 46.822460] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.828015] ? ip6_datagram_recv_common_ctl+0x37b/0x5e0 [ 46.833358] ? skb_copy_datagram_iter+0x10d/0x490 [ 46.838176] ? ipv6_recv_rxpmtu+0x920/0x920 [ 46.842474] ? skb_copy_and_hash_datagram_iter+0x50/0x50 [ 46.847900] ip6_datagram_recv_ctl+0x34/0x40 [ 46.852493] rawv6_recvmsg+0xc43/0xe90 [ 46.856358] ? rawv6_rcv_skb+0x470/0x470 [ 46.860396] ? __fget_light+0x2db/0x420 [ 46.864345] sock_common_recvmsg+0x13f/0x2b0 [ 46.868732] ? compat_sock_common_getsockopt+0x150/0x150 [ 46.874162] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.879681] ? iov_iter_init+0xea/0x220 [ 46.883629] ? security_socket_recvmsg+0x9b/0xd0 [ 46.888361] ? compat_sock_common_getsockopt+0x150/0x150 [ 46.893788] sock_recvmsg+0xd0/0x110 [ 46.897483] __sys_recvfrom+0x30b/0x5d0 [ 46.901437] ? __ia32_sys_send+0x100/0x100 [ 46.905655] ? __sys_sendmsg+0x1a3/0x270 [ 46.909715] ? do_syscall_64+0x8c/0x800 [ 46.913665] ? do_syscall_64+0x8c/0x800 [ 46.917631] ? lockdep_hardirqs_on+0x415/0x5d0 [ 46.922308] ? trace_hardirqs_on+0xbd/0x310 [ 46.926607] ? do_futex+0x2910/0x2910 [ 46.930384] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.935722] ? trace_hardirqs_off_caller+0x300/0x300 [ 46.940798] __x64_sys_recvfrom+0xe1/0x1a0 [ 46.945010] do_syscall_64+0x1a3/0x800 [ 46.948873] ? syscall_return_slowpath+0x5f0/0x5f0 [ 46.953794] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.958788] ? __switch_to_asm+0x34/0x70 [ 46.962827] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.967652] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.972815] RIP: 0033:0x445809 [ 46.975987] 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 [ 46.994862] RSP: 002b:00007fa4f1d90da8 EFLAGS: 00000216 ORIG_RAX: 000000000000002d [ 47.002562] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445809 [ 47.009826] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 47.017075] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 47.024333] R10: 0000000000000002 R11: 0000000000000216 R12: 00000000006dac3c [ 47.031590] R13: 00007ffe1422bbff R14: 00007fa4f1d919c0 R15: 00000000006dad2c [ 47.038845] Modules linked in: [ 47.042512] ---[ end trace 28e44aa0b340db87 ]--- [ 47.047319] RIP: 0010:pskb_expand_head+0xbb0/0x1080 [ 47.052324] Code: 8b b5 e0 fe ff ff 48 85 f6 0f 84 4d fe ff ff e8 a6 ca 68 fb 4d 8d 74 24 ff e9 3e fe ff ff e8 97 ca 68 fb 0f 0b e8 90 ca 68 fb <0f> 0b e8 89 ca 68 fb 81 8d 10 ff ff ff 00 20 00 00 e9 0f f6 ff ff [ 47.071553] RSP: 0018:ffff888081d7f5e0 EFLAGS: 00010293 [ 47.076933] RAX: ffff8880a936a1c0 RBX: ffff88808f2ee480 RCX: ffffffff86192268 [ 47.084199] RDX: 0000000000000000 RSI: ffffffff86192ca0 RDI: 0000000000000005 [ 47.091486] RBP: ffff888081d7f720 R08: ffff8880a936a1c0 R09: ffffed1011e5dcab [ 47.098769] R10: ffffed1011e5dcaa R11: ffff88808f2ee557 R12: ffff88808f2ee53c [ 47.106059] R13: 000000000000003f R14: dffffc0000000000 R15: 0000000000000000 [ 47.113328] FS: 00007fa4f1d91700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 47.121563] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.127465] CR2: 0000000020000300 CR3: 00000000a831f000 CR4: 00000000001406e0 [ 47.134720] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.142000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.149294] Kernel panic - not syncing: Fatal exception [ 47.155704] Kernel Offset: disabled [ 47.159330] Rebooting in 86400 seconds..