[....] 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. [ 29.539698] kauditd_printk_skb: 9 callbacks suppressed [ 29.539710] audit: type=1800 audit(1539412476.232:33): pid=5294 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 [ 29.573891] audit: type=1800 audit(1539412476.232:34): pid=5294 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.511354] audit: type=1400 audit(1539412480.202:35): avc: denied { map } for pid=5468 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 '10.128.0.71' (ECDSA) to the list of known hosts. executing program [ 40.284375] audit: type=1400 audit(1539412486.972:36): avc: denied { map } for pid=5482 comm="syz-executor529" path="/root/syz-executor529342078" 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 [ 40.289718] kasan: CONFIG_KASAN_INLINE enabled [ 40.315480] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.323004] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.329230] CPU: 1 PID: 5482 Comm: syz-executor529 Not tainted 4.19.0-rc7+ #60 [ 40.336573] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.345920] RIP: 0010:rb_erase+0x306/0x3710 [ 40.350230] 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 [ 40.369119] RSP: 0018:ffff8801bc376918 EFLAGS: 00010202 [ 40.374468] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.381721] RDX: 1ffff1003786ed2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 40.388976] RBP: ffff8801bc377320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 40.396230] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801afb633b0 [ 40.403482] R13: dffffc0000000000 R14: ffff8801bc3772f8 R15: ffff8801bc377438 [ 40.410739] FS: 000000000222b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 40.418945] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.424808] CR2: 0000000020000180 CR3: 00000001c583e000 CR4: 00000000001406e0 [ 40.432071] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.439335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.446588] Call Trace: [ 40.449164] ? lockdep_on+0x50/0x50 [ 40.452775] ? rb_insert_color+0x1460/0x1460 [ 40.457170] ? noop_count+0x40/0x40 [ 40.460780] ? lock_pin_lock+0x350/0x350 [ 40.464825] ? noop_count+0x40/0x40 [ 40.468439] ? kasan_check_read+0x11/0x20 [ 40.472570] ? noop_count+0x40/0x40 [ 40.476181] ? noop_count+0x40/0x40 [ 40.479791] ? lock_pin_lock+0x350/0x350 [ 40.483861] ? mark_held_locks+0x130/0x130 [ 40.488085] ? check_usage_forwards+0x3e0/0x3e0 [ 40.492752] ? __bfs+0x385/0x7a0 [ 40.496103] ? noop_count+0x40/0x40 [ 40.499716] ? check_usage+0x1a9/0x790 [ 40.503622] ? lock_pin_lock+0x350/0x350 [ 40.507673] ? check_usage_forwards+0x3e0/0x3e0 [ 40.512328] ? __bfs+0x385/0x7a0 [ 40.515686] ? __lock_acquire+0x7ec/0x4ec0 [ 40.519912] ? lockdep_on+0x50/0x50 [ 40.523524] ? lock_pin_lock+0x350/0x350 [ 40.527576] ? mark_held_locks+0x130/0x130 [ 40.531796] ? kasan_check_read+0x11/0x20 [ 40.535926] ? __lock_acquire+0x2881/0x4ec0 [ 40.540232] ? mark_held_locks+0x130/0x130 [ 40.544466] ? print_usage_bug+0xc0/0xc0 [ 40.548514] ? _raw_spin_unlock+0x2c/0x50 [ 40.552647] ? graph_lock+0x170/0x170 [ 40.556434] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.560654] ? __lock_acquire+0x7ec/0x4ec0 [ 40.564872] ? find_held_lock+0x36/0x1c0 [ 40.568918] ? mark_held_locks+0x130/0x130 [ 40.573135] ? lock_downgrade+0x900/0x900 [ 40.577266] ? ext4_es_scan+0x960/0x960 [ 40.581223] ? lock_release+0x970/0x970 [ 40.585182] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.589837] ? kasan_check_write+0x14/0x20 [ 40.594061] ? lock_acquire+0x1ed/0x520 [ 40.598020] ? integrity_inode_free+0x77/0x320 [ 40.602586] ? ext4_es_remove_extent+0x151/0x500 [ 40.607328] ? lock_release+0x970/0x970 [ 40.611286] ? kasan_check_write+0x14/0x20 [ 40.615507] ? do_raw_write_lock+0xbd/0x1b0 [ 40.619814] integrity_inode_free+0x12f/0x320 [ 40.624299] security_inode_free+0x19/0x90 [ 40.628518] __destroy_inode+0x328/0x820 [ 40.632565] ? generic_update_time+0x450/0x450 [ 40.637130] ? evict+0x5d8/0x980 [ 40.640482] ? lock_downgrade+0x900/0x900 [ 40.644629] ? __inode_wait_for_writeback+0x2cf/0x380 [ 40.649803] destroy_inode+0xda/0x200 [ 40.653783] ? __destroy_inode+0x820/0x820 [ 40.658002] ? kasan_check_write+0x14/0x20 [ 40.662221] ? do_raw_spin_lock+0xc1/0x200 [ 40.666440] evict+0x5e0/0x980 [ 40.669618] ? destroy_inode+0x200/0x200 [ 40.673663] ? iput+0x671/0xa90 [ 40.676946] ? lock_downgrade+0x900/0x900 [ 40.681081] ? kasan_check_read+0x11/0x20 [ 40.685209] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.689774] ? lock_downgrade+0x900/0x900 [ 40.693906] iput+0x679/0xa90 [ 40.696997] ? inode_add_lru+0x2a0/0x2a0 [ 40.701065] ? up_write+0x7b/0x220 [ 40.704601] ? up_read+0x110/0x110 [ 40.708120] ? up_read+0x110/0x110 [ 40.711646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.717167] ? check_preemption_disabled+0x48/0x200 [ 40.722170] ext4_ioctl+0x236f/0x4210 [ 40.725957] ? ext4_ioctl_group_add+0x560/0x560 [ 40.730609] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.736390] ? kasan_check_read+0x11/0x20 [ 40.740518] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.745778] ? rcu_bh_qs+0xc0/0xc0 [ 40.749300] ? unwind_dump+0x190/0x190 [ 40.753170] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.758691] ? avc_has_extended_perms+0xab2/0x15a0 [ 40.763609] ? fpu__prepare_read+0x17/0x750 [ 40.767918] ? avc_ss_reset+0x190/0x190 [ 40.771878] ? save_stack+0xa9/0xd0 [ 40.775516] ? save_stack+0x43/0xd0 [ 40.779128] ? __kasan_slab_free+0x102/0x150 [ 40.783518] ? kasan_slab_free+0xe/0x10 [ 40.787475] ? kmem_cache_free+0x83/0x290 [ 40.791606] ? putname+0xf2/0x130 [ 40.795043] ? do_sys_open+0x54d/0x700 [ 40.798921] ? __x64_sys_openat+0x9d/0x100 [ 40.803140] ? do_syscall_64+0x1b9/0x820 [ 40.807186] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.812537] ? ___might_sleep+0x1ed/0x300 [ 40.816669] ? arch_local_save_flags+0x40/0x40 [ 40.821232] ? kasan_check_write+0x14/0x20 [ 40.825467] ? trace_hardirqs_off+0xb8/0x310 [ 40.829862] ? ext4_ioctl_group_add+0x560/0x560 [ 40.834515] do_vfs_ioctl+0x1de/0x1720 [ 40.838387] ? ioctl_preallocate+0x300/0x300 [ 40.842781] ? selinux_file_mprotect+0x620/0x620 [ 40.847521] ? path_openat+0x901/0x5160 [ 40.851502] ? rcu_read_lock_sched_held+0x108/0x120 [ 40.856506] ? kmem_cache_free+0x24f/0x290 [ 40.860723] ? putname+0xf7/0x130 [ 40.864158] ? do_syscall_64+0x9a/0x820 [ 40.868118] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.873638] ? security_file_ioctl+0x94/0xc0 [ 40.878032] ksys_ioctl+0xa9/0xd0 [ 40.881475] __x64_sys_ioctl+0x73/0xb0 [ 40.885351] do_syscall_64+0x1b9/0x820 [ 40.889225] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.894573] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.899485] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.904315] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.909317] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.914320] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.919324] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.924175] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.929354] RIP: 0033:0x440089 [ 40.932533] 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 [ 40.951424] RSP: 002b:00007ffc447d26e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 40.959119] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 40.966375] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 40.973707] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 40.981066] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 40.988329] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 40.995581] Modules linked in: [ 40.998819] ---[ end trace 7db9a472e92c7073 ]--- [ 41.003626] RIP: 0010:rb_erase+0x306/0x3710 [ 41.007981] 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 [ 41.026905] RSP: 0018:ffff8801bc376918 EFLAGS: 00010202 [ 41.032252] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.039532] RDX: 1ffff1003786ed2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 41.046816] RBP: ffff8801bc377320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 41.054182] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801afb633b0 [ 41.061474] R13: dffffc0000000000 R14: ffff8801bc3772f8 R15: ffff8801bc377438 [ 41.068760] FS: 000000000222b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 41.076999] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.082878] CR2: 0000000020000180 CR3: 00000001c583e000 CR4: 00000000001406e0 [ 41.090164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.097446] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.104810] Kernel panic - not syncing: Fatal exception [ 41.111106] Kernel Offset: disabled [ 41.114728] Rebooting in 86400 seconds..