[ 40.590387] audit: type=1800 audit(1577181901.697:30): pid=7592 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 45.026135] kauditd_printk_skb: 4 callbacks suppressed [ 45.026151] audit: type=1400 audit(1577181906.157:35): avc: denied { map } for pid=7770 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. executing program [ 51.633472] audit: type=1400 audit(1577181912.767:36): avc: denied { map } for pid=7782 comm="syz-executor246" path="/root/syz-executor246020502" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.661942] skbuff: skb_over_panic: text:00000000ac4603da len:194 put:82 head:000000003e5a646d data:000000003e5a646d tail:0xc2 end:0xc0 dev: [ 51.675952] ------------[ cut here ]------------ [ 51.680703] kernel BUG at net/core/skbuff.c:104! [ 51.685543] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 51.690917] CPU: 0 PID: 7782 Comm: syz-executor246 Not tainted 4.19.91-syzkaller #0 [ 51.698697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.708046] RIP: 0010:skb_panic+0x17c/0x17e [ 51.712366] Code: 4c 8b 4d b8 8b 8b 80 00 00 00 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 40 94 49 88 ff 75 c8 ff 75 c0 e8 3b 9f 9a fb <0f> 0b e8 d0 3a b0 fb 4c 8b 6d 08 e8 87 b8 e7 fb 48 c7 c1 00 9e 49 [ 51.731267] RSP: 0018:ffff88809262f9f0 EFLAGS: 00010282 [ 51.736622] RAX: 0000000000000086 RBX: ffff888091976bc0 RCX: 0000000000000000 [ 51.744058] RDX: 0000000000000000 RSI: ffffffff8155bb16 RDI: ffffed10124c5f30 [ 51.751363] RBP: ffff88809262fa58 R08: 0000000000000086 R09: ffffed1015d05079 [ 51.758624] R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: ffffffff88499e40 [ 51.765877] R13: ffffffff86c20fa7 R14: 0000000000000052 R15: ffffffff88499400 [ 51.773189] FS: 0000000001178880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 51.781414] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.787297] CR2: 00005650a6ceb180 CR3: 00000000942c8000 CR4: 00000000001406f0 [ 51.794571] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.801826] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.809089] Call Trace: [ 51.811698] ? sctp_addto_chunk+0xe7/0x2a0 [ 51.815917] skb_put.cold+0x23/0x23 [ 51.819543] sctp_addto_chunk+0xe7/0x2a0 [ 51.823589] sctp_make_strreset_req+0x392/0x3e0 [ 51.828413] ? sctp_make_ifwdtsn+0x150/0x150 [ 51.832805] ? __kmalloc+0x5e1/0x750 [ 51.836502] ? sctp_send_reset_streams+0x433/0xe10 [ 51.841417] sctp_send_reset_streams+0x7ed/0xe10 [ 51.846168] ? _copy_from_user+0xdd/0x150 [ 51.850302] ? tag_mount+0x771/0x1880 [ 51.854093] sctp_setsockopt+0x31a3/0x4f70 [ 51.858314] ? sctp_setsockopt_paddr_thresholds+0x420/0x420 [ 51.864011] ? sock_has_perm+0x209/0x2a0 [ 51.868065] ? selinux_secmark_relabel_packet+0xe0/0xe0 [ 51.873417] ? lockdep_hardirqs_on+0x415/0x5d0 [ 51.877983] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.883523] ? selinux_netlbl_socket_setsockopt+0xb5/0x3f0 [ 51.889243] ? selinux_netlbl_sock_rcv_skb+0x480/0x480 [ 51.894518] ? _raw_spin_unlock_bh+0x31/0x40 [ 51.898922] ? release_sock+0x156/0x1c0 [ 51.902896] sock_common_setsockopt+0x94/0xd0 [ 51.907391] __sys_setsockopt+0x17a/0x280 [ 51.911562] ? kernel_accept+0x310/0x310 [ 51.915650] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.920478] ? do_syscall_64+0x26/0x620 [ 51.924440] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.929799] ? do_syscall_64+0x26/0x620 [ 51.933779] __x64_sys_setsockopt+0xbe/0x150 [ 51.938175] do_syscall_64+0xfd/0x620 [ 51.941973] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.947231] RIP: 0033:0x4402d9 [ 51.950411] 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 [ 51.969299] RSP: 002b:00007fff2926bd38 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 51.976993] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 51.984248] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 51.991508] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 51.998766] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 52.006145] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 52.013526] Modules linked in: [ 52.017573] ---[ end trace 533e27ff3db68061 ]--- [ 52.022383] RIP: 0010:skb_panic+0x17c/0x17e [ 52.026785] Code: 4c 8b 4d b8 8b 8b 80 00 00 00 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 40 94 49 88 ff 75 c8 ff 75 c0 e8 3b 9f 9a fb <0f> 0b e8 d0 3a b0 fb 4c 8b 6d 08 e8 87 b8 e7 fb 48 c7 c1 00 9e 49 [ 52.045791] RSP: 0018:ffff88809262f9f0 EFLAGS: 00010282 [ 52.051204] RAX: 0000000000000086 RBX: ffff888091976bc0 RCX: 0000000000000000 [ 52.058469] RDX: 0000000000000000 RSI: ffffffff8155bb16 RDI: ffffed10124c5f30 [ 52.065863] RBP: ffff88809262fa58 R08: 0000000000000086 R09: ffffed1015d05079 [ 52.073416] R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: ffffffff88499e40 [ 52.080689] R13: ffffffff86c20fa7 R14: 0000000000000052 R15: ffffffff88499400 [ 52.088011] FS: 0000000001178880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.096260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.102168] CR2: 00005650a6ceb180 CR3: 00000000942c8000 CR4: 00000000001406f0 [ 52.109466] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.116793] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.124160] Kernel panic - not syncing: Fatal exception [ 52.131146] Kernel Offset: disabled [ 52.134773] Rebooting in 86400 seconds..