Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 29.579877] audit: type=1800 audit(1539911721.558:33): pid=5287 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 [ 29.603471] audit: type=1800 audit(1539911721.558:34): pid=5287 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: [ 32.541136] audit: type=1400 audit(1539911724.518:35): avc: denied { map } for pid=5462 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 '10.128.0.24' (ECDSA) to the list of known hosts. executing program [ 39.114439] audit: type=1400 audit(1539911731.088:36): avc: denied { map } for pid=5476 comm="syz-executor846" path="/root/syz-executor846182071" 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 [ 39.119241] kasan: CONFIG_KASAN_INLINE enabled [ 39.145468] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.152958] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.159183] CPU: 0 PID: 5476 Comm: syz-executor846 Not tainted 4.19.0-rc8+ #69 [ 39.166518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.175861] RIP: 0010:rb_erase+0x306/0x3710 [ 39.180164] 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 [ 39.199046] RSP: 0018:ffff8801bbdde918 EFLAGS: 00010202 [ 39.204393] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.211658] RDX: 1ffff100377bbd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 39.218909] RBP: ffff8801bbddf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 39.226157] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b12c83b0 [ 39.233408] R13: dffffc0000000000 R14: ffff8801bbddf2f8 R15: ffff8801bbddf438 [ 39.240662] FS: 0000000001757880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 39.248870] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.254730] CR2: 0000000020000080 CR3: 00000001c4d25000 CR4: 00000000001406f0 [ 39.261988] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.269237] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.276485] Call Trace: [ 39.279057] ? lockdep_on+0x50/0x50 [ 39.282670] ? rb_insert_color+0x1460/0x1460 [ 39.287064] ? noop_count+0x40/0x40 [ 39.290674] ? lock_pin_lock+0x350/0x350 [ 39.294715] ? mark_held_locks+0x130/0x130 [ 39.298934] ? kasan_check_read+0x11/0x20 [ 39.303067] ? noop_count+0x40/0x40 [ 39.306674] ? lock_pin_lock+0x350/0x350 [ 39.310718] ? mark_held_locks+0x130/0x130 [ 39.314935] ? check_usage_forwards+0x3e0/0x3e0 [ 39.319587] ? __bfs+0x385/0x7a0 [ 39.322934] ? noop_count+0x40/0x40 [ 39.326559] ? check_usage+0x1a9/0x790 [ 39.330434] ? lock_pin_lock+0x350/0x350 [ 39.334480] ? check_usage_forwards+0x3e0/0x3e0 [ 39.339130] ? __bfs+0x385/0x7a0 [ 39.342481] ? modules_open+0xa0/0xa0 [ 39.346264] ? lockdep_on+0x50/0x50 [ 39.349875] ? lock_pin_lock+0x350/0x350 [ 39.353923] ? mark_held_locks+0x130/0x130 [ 39.358141] ? kasan_check_read+0x11/0x20 [ 39.362271] ? __lock_acquire+0x2881/0x4ec0 [ 39.366581] ? mark_held_locks+0x130/0x130 [ 39.370799] ? print_usage_bug+0xc0/0xc0 [ 39.374841] ? _raw_spin_unlock+0x2c/0x50 [ 39.378976] ? graph_lock+0x170/0x170 [ 39.382778] ? ext4_exit_mballoc+0xc0/0xc0 [ 39.386993] ? __lock_acquire+0x7ec/0x4ec0 [ 39.391212] ? find_held_lock+0x36/0x1c0 [ 39.395270] ? mark_held_locks+0x130/0x130 [ 39.399489] ? lock_downgrade+0x900/0x900 [ 39.403621] ? ext4_es_scan+0x960/0x960 [ 39.407584] ? lock_release+0x970/0x970 [ 39.411542] ? do_raw_write_trylock+0x1c0/0x1c0 [ 39.416195] ? kasan_check_write+0x14/0x20 [ 39.420414] ? lock_acquire+0x1ed/0x520 [ 39.424369] ? integrity_inode_free+0x77/0x320 [ 39.428933] ? ext4_es_remove_extent+0x151/0x500 [ 39.433669] ? lock_release+0x970/0x970 [ 39.437628] ? kasan_check_write+0x14/0x20 [ 39.441847] ? do_raw_write_lock+0xbd/0x1b0 [ 39.446167] integrity_inode_free+0x12f/0x320 [ 39.450651] security_inode_free+0x19/0x90 [ 39.454867] __destroy_inode+0x328/0x820 [ 39.458909] ? generic_update_time+0x450/0x450 [ 39.463472] ? evict+0x5d8/0x980 [ 39.466820] ? lock_downgrade+0x900/0x900 [ 39.470970] ? __inode_wait_for_writeback+0x2cf/0x380 [ 39.476158] destroy_inode+0xda/0x200 [ 39.479939] ? __destroy_inode+0x820/0x820 [ 39.484153] ? kasan_check_write+0x14/0x20 [ 39.488373] ? do_raw_spin_lock+0xc1/0x200 [ 39.492590] evict+0x5e0/0x980 [ 39.495768] ? destroy_inode+0x200/0x200 [ 39.499814] ? iput+0x671/0xa90 [ 39.503075] ? lock_downgrade+0x900/0x900 [ 39.507206] ? kasan_check_read+0x11/0x20 [ 39.511336] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.515901] ? lock_downgrade+0x900/0x900 [ 39.520048] iput+0x679/0xa90 [ 39.523158] ? inode_add_lru+0x2a0/0x2a0 [ 39.527198] ? up_write+0x7b/0x220 [ 39.530718] ? up_read+0x110/0x110 [ 39.534234] ? up_read+0x110/0x110 [ 39.537767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.543288] ? check_preemption_disabled+0x48/0x200 [ 39.548286] ext4_ioctl+0x236f/0x4210 [ 39.552070] ? ext4_ioctl_group_add+0x560/0x560 [ 39.556725] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 39.562503] ? kasan_check_read+0x11/0x20 [ 39.566630] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.571887] ? rcu_bh_qs+0xc0/0xc0 [ 39.575406] ? unwind_dump+0x190/0x190 [ 39.579280] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.584814] ? avc_has_extended_perms+0xab2/0x15a0 [ 39.589733] ? convert_from_fxsr+0x4a7/0x7d0 [ 39.594125] ? avc_ss_reset+0x190/0x190 [ 39.598085] ? save_stack+0xa9/0xd0 [ 39.601695] ? save_stack+0x43/0xd0 [ 39.605306] ? __kasan_slab_free+0x102/0x150 [ 39.609695] ? kasan_slab_free+0xe/0x10 [ 39.613649] ? kmem_cache_free+0x83/0x290 [ 39.617788] ? putname+0xf2/0x130 [ 39.621230] ? do_sys_open+0x54d/0x700 [ 39.625097] ? __x64_sys_openat+0x9d/0x100 [ 39.629312] ? do_syscall_64+0x1b9/0x820 [ 39.633369] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.638721] ? ___might_sleep+0x1ed/0x300 [ 39.642852] ? arch_local_save_flags+0x40/0x40 [ 39.647414] ? kasan_check_write+0x14/0x20 [ 39.651634] ? trace_hardirqs_off+0xb8/0x310 [ 39.656026] ? ext4_ioctl_group_add+0x560/0x560 [ 39.660677] do_vfs_ioctl+0x1de/0x1720 [ 39.664548] ? ioctl_preallocate+0x300/0x300 [ 39.668942] ? selinux_file_mprotect+0x620/0x620 [ 39.673676] ? path_openat+0x3ce1/0x5160 [ 39.677730] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.682761] ? kmem_cache_free+0x24f/0x290 [ 39.686976] ? putname+0xf7/0x130 [ 39.690414] ? do_syscall_64+0x9a/0x820 [ 39.694386] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.699905] ? security_file_ioctl+0x94/0xc0 [ 39.704292] ksys_ioctl+0xa9/0xd0 [ 39.707731] __x64_sys_ioctl+0x73/0xb0 [ 39.711610] do_syscall_64+0x1b9/0x820 [ 39.715482] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.720842] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.725761] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.730587] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.735584] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.740586] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.745587] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.750430] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.755603] RIP: 0033:0x440009 [ 39.758779] 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 [ 39.777663] RSP: 002b:00007ffd8cc21be8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 39.785350] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 39.792619] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 39.799870] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 39.807116] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 39.814364] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 39.821620] Modules linked in: [ 39.824861] ---[ end trace eb05c2fd8967b5fd ]--- [ 39.829644] RIP: 0010:rb_erase+0x306/0x3710 [ 39.833953] 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 [ 39.852866] RSP: 0018:ffff8801bbdde918 EFLAGS: 00010202 [ 39.858243] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.865496] RDX: 1ffff100377bbd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 39.872785] RBP: ffff8801bbddf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 39.880077] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b12c83b0 [ 39.887349] R13: dffffc0000000000 R14: ffff8801bbddf2f8 R15: ffff8801bbddf438 [ 39.894778] FS: 0000000001757880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 39.903015] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.908908] CR2: 0000000020000080 CR3: 00000001c4d25000 CR4: 00000000001406f0 [ 39.916175] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.923454] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.930734] Kernel panic - not syncing: Fatal exception [ 39.937010] Kernel Offset: disabled [ 39.940633] Rebooting in 86400 seconds..