[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon:[ 30.729154] kauditd_printk_skb: 9 callbacks suppressed restorecond[?2[ 30.729168] audit: type=1800 audit(1537915786.267:33): pid=5328 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 5l[?1c7[ ok 8[?25h[?0c. [ 30.770531] audit: type=1800 audit(1537915786.267:34): pid=5328 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [ 31.139993] audit: type=1400 audit(1537915786.677:35): avc: denied { map } for pid=5504 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.95' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.851257] audit: type=1400 audit(1537915793.387:36): avc: denied { map } for pid=5518 comm="syz-executor542" path="/root/syz-executor542853637" 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 [ 37.856950] kasan: CONFIG_KASAN_INLINE enabled [ 37.882818] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.890225] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.896453] CPU: 1 PID: 5518 Comm: syz-executor542 Not tainted 4.19.0-rc5+ #33 [ 37.903794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.913150] RIP: 0010:rb_erase+0x306/0x3710 [ 37.917459] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 37.936342] RSP: 0018:ffff8801c5136918 EFLAGS: 00010202 [ 37.941696] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.948958] RDX: 1ffff10038a26d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 37.956208] RBP: ffff8801c5137320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 37.963456] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b2f673b0 [ 37.970707] R13: dffffc0000000000 R14: ffff8801c51372f8 R15: ffff8801c5137438 [ 37.977959] FS: 0000000002540880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.986176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.992035] CR2: 0000000020000180 CR3: 00000001d1e0e000 CR4: 00000000001406e0 [ 37.999285] Call Trace: [ 38.001864] ? lockdep_on+0x50/0x50 [ 38.005474] ? rb_insert_color+0x1460/0x1460 [ 38.009862] ? noop_count+0x40/0x40 [ 38.013469] ? lock_pin_lock+0x350/0x350 [ 38.017508] ? noop_count+0x40/0x40 [ 38.021116] ? kasan_check_read+0x11/0x20 [ 38.025246] ? noop_count+0x40/0x40 [ 38.028854] ? noop_count+0x40/0x40 [ 38.032464] ? lock_pin_lock+0x350/0x350 [ 38.036505] ? mark_held_locks+0x130/0x130 [ 38.040721] ? check_usage_forwards+0x3e0/0x3e0 [ 38.045369] ? __bfs+0x385/0x7a0 [ 38.048715] ? noop_count+0x40/0x40 [ 38.052340] ? check_usage+0x1a9/0x790 [ 38.056221] ? lock_pin_lock+0x350/0x350 [ 38.060262] ? check_usage_forwards+0x3e0/0x3e0 [ 38.064913] ? __bfs+0x385/0x7a0 [ 38.068264] ? __lock_acquire+0x7ec/0x4ec0 [ 38.072479] ? lockdep_on+0x50/0x50 [ 38.076087] ? lock_pin_lock+0x350/0x350 [ 38.080132] ? mark_held_locks+0x130/0x130 [ 38.084351] ? kasan_check_read+0x11/0x20 [ 38.088477] ? __lock_acquire+0x2881/0x4ec0 [ 38.092786] ? mark_held_locks+0x130/0x130 [ 38.097023] ? print_usage_bug+0xc0/0xc0 [ 38.101068] ? _raw_spin_unlock+0x2c/0x50 [ 38.105202] ? graph_lock+0x170/0x170 [ 38.108987] ? ext4_exit_mballoc+0xc0/0xc0 [ 38.113205] ? __lock_acquire+0x7ec/0x4ec0 [ 38.117423] ? find_held_lock+0x36/0x1c0 [ 38.121467] ? mark_held_locks+0x130/0x130 [ 38.125694] ? lock_downgrade+0x900/0x900 [ 38.129822] ? ext4_es_scan+0x960/0x960 [ 38.133796] ? do_raw_write_trylock+0x1c0/0x1c0 [ 38.138449] ? kasan_check_write+0x14/0x20 [ 38.142665] ? lock_acquire+0x1ed/0x520 [ 38.146623] ? integrity_inode_free+0x77/0x320 [ 38.151182] ? ext4_es_remove_extent+0x151/0x500 [ 38.155922] ? lock_release+0x970/0x970 [ 38.159880] ? kasan_check_write+0x14/0x20 [ 38.164097] ? do_raw_write_lock+0xbd/0x1b0 [ 38.168401] integrity_inode_free+0x12f/0x320 [ 38.172886] security_inode_free+0x19/0x90 [ 38.177105] __destroy_inode+0x328/0x820 [ 38.181147] ? generic_update_time+0x450/0x450 [ 38.185707] ? evict+0x5d8/0x980 [ 38.189056] ? lock_downgrade+0x900/0x900 [ 38.193190] ? __inode_wait_for_writeback+0x2cf/0x380 [ 38.198360] destroy_inode+0xda/0x200 [ 38.202140] ? __destroy_inode+0x820/0x820 [ 38.206356] ? kasan_check_write+0x14/0x20 [ 38.210567] ? do_raw_spin_lock+0xc1/0x200 [ 38.214783] evict+0x5e0/0x980 [ 38.217955] ? destroy_inode+0x200/0x200 [ 38.222017] ? iput+0x671/0xa90 [ 38.225277] ? lock_downgrade+0x900/0x900 [ 38.229405] ? kasan_check_read+0x11/0x20 [ 38.233549] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.238117] ? lock_downgrade+0x900/0x900 [ 38.242264] iput+0x679/0xa90 [ 38.245357] ? inode_add_lru+0x2a0/0x2a0 [ 38.249401] ? up_write+0x7b/0x220 [ 38.252923] ? up_read+0x110/0x110 [ 38.256440] ? up_read+0x110/0x110 [ 38.259965] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.265484] ? check_preemption_disabled+0x48/0x200 [ 38.270515] ext4_ioctl+0x236f/0x4210 [ 38.274300] ? ext4_ioctl_group_add+0x560/0x560 [ 38.278963] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 38.284751] ? kasan_check_read+0x11/0x20 [ 38.288877] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.294135] ? rcu_bh_qs+0xc0/0xc0 [ 38.297657] ? rcu_bh_qs+0xc0/0xc0 [ 38.301180] ? unwind_dump+0x190/0x190 [ 38.305066] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.311225] ? avc_has_extended_perms+0xab2/0x15a0 [ 38.317052] ? avc_ss_reset+0x190/0x190 [ 38.321872] ? save_stack+0xa9/0xd0 [ 38.325983] ? save_stack+0x43/0xd0 [ 38.330262] ? __kasan_slab_free+0x102/0x150 [ 38.335404] ? kasan_slab_free+0xe/0x10 [ 38.339919] ? kmem_cache_free+0x83/0x290 [ 38.344049] ? putname+0xf2/0x130 [ 38.347484] ? do_sys_open+0x54d/0x700 [ 38.351350] ? __x64_sys_open+0x7e/0xc0 [ 38.355310] ? do_syscall_64+0x1b9/0x820 [ 38.359647] ? kasan_check_read+0x11/0x20 [ 38.363783] ? ___might_sleep+0x1ed/0x300 [ 38.367910] ? arch_local_save_flags+0x40/0x40 [ 38.372472] ? kasan_check_write+0x14/0x20 [ 38.376694] ? trace_hardirqs_off+0xb8/0x310 [ 38.381089] ? ext4_ioctl_group_add+0x560/0x560 [ 38.385761] do_vfs_ioctl+0x1de/0x1720 [ 38.389634] ? ioctl_preallocate+0x300/0x300 [ 38.394068] ? selinux_file_mprotect+0x620/0x620 [ 38.398811] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.403818] ? kmem_cache_free+0x18b/0x290 [ 38.408038] ? putname+0xf7/0x130 [ 38.411475] ? do_syscall_64+0x9a/0x820 [ 38.415440] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.420963] ? security_file_ioctl+0x94/0xc0 [ 38.425359] ksys_ioctl+0xa9/0xd0 [ 38.428794] __x64_sys_ioctl+0x73/0xb0 [ 38.432665] do_syscall_64+0x1b9/0x820 [ 38.436541] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.441890] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.446803] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.451625] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.456636] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.461643] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.466661] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.471490] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.476660] RIP: 0033:0x4400c9 [ 38.479841] 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 [ 38.498725] RSP: 002b:00007fff1dea43e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 38.506415] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400c9 [ 38.513700] RDX: 00000000004400c9 RSI: 0000000000006611 RDI: 0000000000000004 [ 38.520954] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 38.528205] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401950 [ 38.535455] R13: 00000000004019e0 R14: 0000000000000000 R15: 0000000000000000 [ 38.542831] Modules linked in: [ 38.546085] ---[ end trace 399c98d5921259de ]--- [ 38.550865] RIP: 0010:rb_erase+0x306/0x3710 [ 38.555226] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 38.574147] RSP: 0018:ffff8801c5136918 EFLAGS: 00010202 [ 38.579497] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.586782] RDX: 1ffff10038a26d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 38.594067] RBP: ffff8801c5137320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 38.601319] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b2f673b0 [ 38.608602] R13: dffffc0000000000 R14: ffff8801c51372f8 R15: ffff8801c5137438 [ 38.615889] FS: 0000000002540880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 38.624133] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.630013] CR2: 0000000020000180 CR3: 00000001d1e0e000 CR4: 00000000001406e0 [ 38.637299] Kernel panic - not syncing: Fatal exception [ 38.643534] Kernel Offset: disabled [ 38.647161] Rebooting in 86400 seconds..