[?25l[?1c7[ ok 8[?25h[?0c. [ 16.340379] install (4119) used greatest stack depth: 17328 bytes left [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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: [ 18.204247] audit: type=1400 audit(1519462760.630:6): avc: denied { map } for pid=4216 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 '10.128.0.4' (ECDSA) to the list of known hosts. executing program [ 24.545803] audit: type=1400 audit(1519462766.971:7): avc: denied { map } for pid=4230 comm="syzkaller672661" path="/root/syzkaller672661426" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 24.550512] ------------[ cut here ]------------ [ 24.576488] kernel BUG at ./include/linux/skbuff.h:2073! [ 24.582233] invalid opcode: 0000 [#1] SMP KASAN [ 24.586892] Dumping ftrace buffer: [ 24.590400] (ftrace buffer empty) [ 24.594080] Modules linked in: [ 24.597246] CPU: 1 PID: 4230 Comm: syzkaller672661 Not tainted 4.16.0-rc2+ #326 [ 24.604660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.613993] RIP: 0010:__ip6_make_skb+0x1ac8/0x2190 [ 24.618891] RSP: 0018:ffff8801bc18f0f0 EFLAGS: 00010293 [ 24.624224] RAX: ffff8801b17400c0 RBX: 0000000000000738 RCX: ffffffff84f01828 [ 24.631819] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801b415ac18 [ 24.639060] RBP: ffff8801bc18f360 R08: ffff8801b4576844 R09: 0000000000000000 [ 24.646299] R10: ffff8801bc18f380 R11: ffffed00367aee4e R12: 00000000000000d6 [ 24.653538] R13: ffff8801b415a740 R14: dffffc0000000000 R15: ffff8801b45767c0 [ 24.660779] FS: 0000000001535880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.668974] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.674827] CR2: 000000002000b000 CR3: 00000001b4123001 CR4: 00000000001606e0 [ 24.682069] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.689319] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.696559] Call Trace: [ 24.699141] ? ip6_output+0x840/0x840 [ 24.702917] ? __lock_acquire+0x664/0x3e00 [ 24.707133] ? check_noncircular+0x20/0x20 [ 24.711340] ? __lock_acquire+0x664/0x3e00 [ 24.715546] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.720731] ? print_irqtrace_events+0x270/0x270 [ 24.725456] ? find_held_lock+0x35/0x1d0 [ 24.729489] ? lock_acquire+0x1d5/0x580 [ 24.733432] ? lock_sock_nested+0xa3/0x110 [ 24.737640] ? lock_acquire+0x1d5/0x580 [ 24.741594] ? udpv6_sendmsg+0x9c5/0x3400 [ 24.745721] udp_v6_push_pending_frames+0x269/0x3b0 [ 24.750707] ? udp_v6_push_pending_frames+0x269/0x3b0 [ 24.755871] ? udp_v6_send_skb+0xf70/0xf70 [ 24.760075] ? ip6_append_data+0x189/0x290 [ 24.764305] udpv6_sendmsg+0x2a96/0x3400 [ 24.768339] ? udpv6_sendmsg+0x3400/0x3400 [ 24.772550] ? udpv6_setsockopt+0x80/0x80 [ 24.776676] ? avc_has_perm+0x43e/0x680 [ 24.780619] ? avc_has_perm_noaudit+0x520/0x520 [ 24.785268] ? lock_release+0xa40/0xa40 [ 24.789215] ? check_noncircular+0x20/0x20 [ 24.793421] ? __might_sleep+0x95/0x190 [ 24.797380] ? kasan_check_write+0x14/0x20 [ 24.801594] ? _copy_from_user+0x99/0x110 [ 24.805722] ? find_held_lock+0x35/0x1d0 [ 24.809758] ? sock_has_perm+0x2a4/0x420 [ 24.813789] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.819120] ? lock_downgrade+0x980/0x980 [ 24.823238] ? dup_iter+0x172/0x260 [ 24.826843] inet_sendmsg+0x11f/0x5e0 [ 24.830615] ? inet_sendmsg+0x11f/0x5e0 [ 24.834558] ? inet_create+0xf50/0xf50 [ 24.838416] ? selinux_socket_sendmsg+0x36/0x40 [ 24.843055] ? security_socket_sendmsg+0x89/0xb0 [ 24.847780] ? inet_create+0xf50/0xf50 [ 24.851640] sock_sendmsg+0xca/0x110 [ 24.855328] ___sys_sendmsg+0x320/0x8b0 [ 24.859277] ? copy_msghdr_from_user+0x590/0x590 [ 24.864021] ? ___sys_sendmsg+0x49f/0x8b0 [ 24.868165] ? __fget_light+0x2b2/0x3c0 [ 24.872125] ? fget_raw+0x20/0x20 [ 24.875554] ? __pmd_alloc+0x4e0/0x4e0 [ 24.879410] ? __fd_install+0x25f/0x740 [ 24.883359] ? find_held_lock+0x35/0x1d0 [ 24.887405] ? __fdget+0x18/0x20 [ 24.890747] __sys_sendmmsg+0x1ee/0x620 [ 24.894691] ? __sys_sendmmsg+0x1ee/0x620 [ 24.898816] ? SyS_sendmsg+0x50/0x50 [ 24.902501] ? lock_downgrade+0x980/0x980 [ 24.906631] ? __do_page_fault+0x3d6/0xc90 [ 24.910839] ? move_addr_to_kernel+0x60/0x60 [ 24.915220] SyS_sendmmsg+0x35/0x60 [ 24.918818] ? __sys_sendmmsg+0x620/0x620 [ 24.922939] do_syscall_64+0x280/0x940 [ 24.926800] ? __do_page_fault+0xc90/0xc90 [ 24.931005] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.936519] ? syscall_return_slowpath+0x550/0x550 [ 24.941420] ? syscall_return_slowpath+0x2ac/0x550 [ 24.946322] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.951657] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.956472] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.961632] RIP: 0033:0x4404c9 [ 24.964790] RSP: 002b:00007ffdce35f948 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 [ 24.972467] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404c9 [ 24.979704] RDX: 0000000000000003 RSI: 0000000020001f00 RDI: 0000000000000003 [ 24.986945] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 24.994183] R10: 0000000020000080 R11: 0000000000000217 R12: 0000000000401df0 [ 25.001422] R13: 0000000000401e80 R14: 0000000000000000 R15: 0000000000000000 [ 25.008671] Code: ff e8 1d 5e b9 fc e9 15 e9 ff ff e8 13 5e b9 fc e9 44 e8 ff ff e8 29 5e b9 fc e9 c0 e6 ff ff e8 3f f3 80 fc 0f 0b e8 38 f3 80 fc <0f> 0b 49 8d 87 80 00 00 00 4d 8d 87 84 00 00 00 48 89 85 20 fe [ 25.027751] RIP: __ip6_make_skb+0x1ac8/0x2190 RSP: ffff8801bc18f0f0 [ 25.034161] ---[ end trace 0855684d21f8036f ]--- [ 25.038913] Kernel panic - not syncing: Fatal exception [ 25.044702] Dumping ftrace buffer: [ 25.048215] (ftrace buffer empty) [ 25.051893] Kernel Offset: disabled [ 25.055488] Rebooting in 86400 seconds..