[....] Starting enhanced syslogd: rsyslogd[ 13.430192] audit: type=1400 audit(1512722596.578:5): avc: denied { syslog } for pid=2992 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 25.494170] audit: type=1400 audit(1512722608.642:6): avc: denied { map } for pid=3134 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 'ci-upstream-kasan-gce-386-1,10.128.15.213' (ECDSA) to the list of known hosts. [ 31.594892] audit: type=1400 audit(1512722614.743:7): avc: denied { map } for pid=3148 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2017/12/08 08:43:35 parsed 1 programs 2017/12/08 08:43:35 executed programs: 0 [ 32.064294] audit: type=1400 audit(1512722615.213:8): avc: denied { map } for pid=3148 comm="syz-execprog" path="/root/syzkaller-shm668611391" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 32.181103] skbuff: skb_over_panic: text:000000006c0bde56 len:196 put:20 head:0000000057614fc2 data:00000000f9579c5d tail:0xd4 end:0xc0 dev:lo [ 32.194238] ------------[ cut here ]------------ [ 32.198983] kernel BUG at net/core/skbuff.c:104! [ 32.203778] invalid opcode: 0000 [#1] SMP KASAN [ 32.208418] Dumping ftrace buffer: [ 32.211926] (ftrace buffer empty) [ 32.215601] Modules linked in: [ 32.218763] CPU: 1 PID: 3162 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #122 [ 32.226004] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.235335] RIP: 0010:skb_panic+0x15c/0x1f0 [ 32.239620] RSP: 0000:ffff8801db507508 EFLAGS: 00010286 [ 32.244949] RAX: 0000000000000082 RBX: ffff8801c506e480 RCX: 0000000000000000 [ 32.252272] RDX: 0000000000000082 RSI: 1ffff1003b6a0e61 RDI: ffffed003b6a0e95 [ 32.259508] RBP: ffff8801db507570 R08: 1ffff1003b6a0e23 R09: 0000000000000000 [ 32.266754] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff857d24a0 [ 32.273995] R13: ffffffff84738f82 R14: 0000000000000014 R15: ffff8801c52a0d40 [ 32.281236] FS: 0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:0000000009536900 [ 32.289428] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 32.295276] CR2: 0000000008063d60 CR3: 00000001c5f39000 CR4: 00000000001406e0 [ 32.302525] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.309762] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.316997] Call Trace: [ 32.319544] [ 32.321670] ? __do_page_fault+0x5c9/0xc90 [ 32.325869] ? do_page_fault+0xee/0x720 [ 32.329811] ? page_fault+0x22/0x30 [ 32.333418] ? add_grhead.isra.24+0x42/0x3b0 [ 32.337803] skb_put+0x181/0x1c0 [ 32.341140] add_grhead.isra.24+0x42/0x3b0 [ 32.345340] add_grec+0xa55/0x1060 [ 32.348846] ? check_noncircular+0x20/0x20 [ 32.353054] ? mld_sendpack+0xcc0/0xcc0 [ 32.356998] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 32.361982] ? trace_hardirqs_on+0xd/0x10 [ 32.366099] mld_ifc_timer_expire+0x4d2/0x770 [ 32.370571] call_timer_fn+0x23b/0x840 [ 32.374422] ? mld_dad_timer_expire+0x100/0x100 [ 32.379055] ? process_timeout+0x40/0x40 [ 32.383087] ? print_usage_bug+0x3f0/0x3f0 [ 32.387302] ? lock_downgrade+0x980/0x980 [ 32.391421] ? __run_timers+0x1ce/0xb60 [ 32.395371] ? lock_release+0xda0/0xda0 [ 32.399317] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 32.404302] ? mld_dad_timer_expire+0x100/0x100 [ 32.408937] ? mld_dad_timer_expire+0x100/0x100 [ 32.413576] __run_timers+0x7e1/0xb60 [ 32.417350] ? del_timer_sync+0x240/0x240 [ 32.421470] ? timerqueue_add+0x1e9/0x280 [ 32.425589] ? enqueue_hrtimer+0x162/0x490 [ 32.429793] ? find_held_lock+0x39/0x1d0 [ 32.433822] ? check_noncircular+0x20/0x20 [ 32.438043] ? print_usage_bug+0x3f0/0x3f0 [ 32.442244] ? lock_downgrade+0x980/0x980 [ 32.446368] ? lock_acquire+0x1d5/0x580 [ 32.450320] ? clockevents_program_event+0x163/0x2e0 [ 32.455395] ? __lock_is_held+0xbc/0x140 [ 32.459426] run_timer_softirq+0x4c/0xb0 [ 32.463454] __do_softirq+0x29d/0xbb2 [ 32.467236] ? __irqentry_text_end+0x4/0x4 [ 32.471441] ? do_timer+0x50/0x50 [ 32.474864] ? native_apic_msr_write+0x5c/0x80 [ 32.479415] ? do_raw_spin_trylock+0x190/0x190 [ 32.483962] ? lapic_next_event+0x54/0x80 [ 32.488080] ? clockevents_program_event+0x108/0x2e0 [ 32.493153] ? tick_program_event+0x83/0x100 [ 32.497530] ? __lock_is_held+0xbc/0x140 [ 32.501568] irq_exit+0x1d3/0x210 [ 32.504994] smp_apic_timer_interrupt+0x16b/0x700 [ 32.509814] ? smp_reschedule_interrupt+0xe6/0x670 [ 32.514708] ? smp_call_function_single_interrupt+0x640/0x640 [ 32.520568] ? _raw_spin_lock+0x32/0x40 [ 32.524513] ? handle_edge_irq+0x2b4/0x7c0 [ 32.528716] ? task_prio+0x40/0x40 [ 32.532229] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.537046] apic_timer_interrupt+0x9d/0xb0 [ 32.541341] [ 32.543547] RIP: 0010:rcu_read_lock_held+0x8f/0xc0 [ 32.548440] RSP: 0000:ffff8801c5dd7530 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11 [ 32.556125] RAX: 0000000000000001 RBX: ffffea00071f6400 RCX: 1ffff10038bbae99 [ 32.563400] RDX: dffffc0000000000 RSI: 0000000008066000 RDI: ffff8801db51afac [ 32.570637] RBP: ffff8801c5dd7530 R08: 0000000000000003 R09: 1ffff10038bbae03 [ 32.577872] R10: ffff8801c5c9e400 R11: 0000000000000003 R12: ffffed0038bbaf33 [ 32.585113] R13: ffffed0038bbaf0b R14: dffffc0000000000 R15: ffff8801c5dd79f8 [ 32.592369] filemap_map_pages+0x690/0x15d0 [ 32.596671] ? find_get_entries_tag+0xeb0/0xeb0 [ 32.601312] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 32.606470] ? get_mem_cgroup_from_mm+0x49b/0x710 [ 32.611279] ? __lru_cache_add+0x2a4/0x410 [ 32.615481] ? print_usage_bug+0x3f0/0x3f0 [ 32.619681] ? print_usage_bug+0x3f0/0x3f0 [ 32.623890] ? check_noncircular+0x20/0x20 [ 32.628093] ? __lock_acquire+0x6e9/0x47f0 [ 32.632291] ? __lock_acquire+0x6e9/0x47f0 [ 32.636491] ? get_mem_cgroup_from_mm+0x710/0x710 [ 32.641300] ? lru_cache_add_file+0x20/0x20 [ 32.645586] ? __mem_cgroup_threshold+0x8f0/0x8f0 [ 32.650401] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 32.655559] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 32.660718] ? lock_downgrade+0x980/0x980 [ 32.664837] ? add_page_to_unevictable_list+0x730/0x730 [ 32.670174] ? __handle_mm_fault+0x2b76/0x3e20 [ 32.674736] ? lock_release+0xda0/0xda0 [ 32.678698] __handle_mm_fault+0x2338/0x3e20 [ 32.683073] ? check_noncircular+0x20/0x20 [ 32.687276] ? __pmd_alloc+0x4e0/0x4e0 [ 32.691129] ? find_held_lock+0x39/0x1d0 [ 32.695160] ? lock_downgrade+0x980/0x980 [ 32.699274] ? __lock_is_held+0xbc/0x140 [ 32.703315] handle_mm_fault+0x334/0x8d0 [ 32.707344] ? down_read_trylock+0xdb/0x170 [ 32.711649] ? __do_page_fault+0x32d/0xc90 [ 32.715864] ? __handle_mm_fault+0x3e20/0x3e20 [ 32.720411] ? vmacache_find+0x5f/0x280 [ 32.724356] ? find_vma+0x30/0x150 [ 32.727864] __do_page_fault+0x5c9/0xc90 [ 32.731909] ? mm_fault_error+0x2c0/0x2c0 [ 32.736028] ? lockdep_sys_exit+0x47/0xf0 [ 32.740146] do_page_fault+0xee/0x720 [ 32.743914] ? __do_page_fault+0xc90/0xc90 [ 32.748117] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.752853] ? lockdep_sys_exit+0x47/0xf0 [ 32.756980] ? syscall_return_slowpath+0x2ad/0x550 [ 32.761883] ? lockdep_sys_exit+0x47/0xf0 [ 32.766000] ? retint_user+0x18/0x18 [ 32.769683] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.774496] page_fault+0x22/0x30 [ 32.777915] RIP: 0023:0x8063d60 [ 32.781159] RSP: 002b:00000000fff986ac EFLAGS: 00010206 [ 32.786493] RAX: 0000000000000011 RBX: 000000000000000f RCX: 00000000f7f6c000 [ 32.794252] RDX: 0000000000000003 RSI: 00000000f7f8cb40 RDI: 0000000000021000 [ 32.801490] RBP: 00000000fff98758 R08: 0000000000000000 R09: 0000000000000000 [ 32.808728] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 32.815976] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 32.823229] Code: 03 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 78 41 57 48 c7 c7 20 1d 7d 85 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 ac 37 3f fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 3d f4 [ 32.842299] RIP: skb_panic+0x15c/0x1f0 RSP: ffff8801db507508 [ 32.848101] ---[ end trace 84d1dbfead833f73 ]--- [ 32.852846] Kernel panic - not syncing: Fatal exception in interrupt [ 32.859351] Dumping ftrace buffer: [ 32.862865] (ftrace buffer empty) [ 32.866545] Kernel Offset: disabled [ 32.870139] Rebooting in 86400 seconds..