[....] 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. [ 30.054146] kauditd_printk_skb: 9 callbacks suppressed [ 30.054158] audit: type=1800 audit(1540125431.121:33): pid=5319 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 [ 30.082493] audit: type=1800 audit(1540125431.121:34): pid=5319 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: [ 31.932681] audit: type=1400 audit(1540125433.001:35): avc: denied { map } for pid=5495 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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program [ 38.518184] audit: type=1400 audit(1540125439.581:36): avc: denied { map } for pid=5509 comm="syz-executor906" path="/root/syz-executor906786503" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 38.523032] kasan: CONFIG_KASAN_INLINE enabled [ 38.549796] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.557184] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.563401] CPU: 1 PID: 5509 Comm: syz-executor906 Not tainted 4.19.0-rc8+ #74 [ 38.570741] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.580098] RIP: 0010:rb_erase+0x306/0x3710 [ 38.584403] 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 [ 38.603286] RSP: 0018:ffff8801b8b26918 EFLAGS: 00010202 [ 38.608632] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.615880] RDX: 1ffff10037164d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 38.623130] RBP: ffff8801b8b27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 38.630381] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b0f343b0 [ 38.637633] R13: dffffc0000000000 R14: ffff8801b8b272f8 R15: ffff8801b8b27438 [ 38.644891] FS: 0000000000d88880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 38.653098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.658960] CR2: 0000000020000080 CR3: 00000001b29c6000 CR4: 00000000001406e0 [ 38.666210] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.673504] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.680758] Call Trace: [ 38.683345] ? lockdep_on+0x50/0x50 [ 38.686950] ? rb_insert_color+0x1460/0x1460 [ 38.691357] ? noop_count+0x40/0x40 [ 38.694965] ? lock_pin_lock+0x350/0x350 [ 38.699006] ? mark_held_locks+0x130/0x130 [ 38.703223] ? kasan_check_read+0x11/0x20 [ 38.707355] ? noop_count+0x40/0x40 [ 38.710976] ? lock_pin_lock+0x350/0x350 [ 38.715015] ? mark_held_locks+0x130/0x130 [ 38.719237] ? check_usage_forwards+0x3e0/0x3e0 [ 38.723885] ? __bfs+0x385/0x7a0 [ 38.727225] ? noop_count+0x40/0x40 [ 38.730838] ? check_usage+0x1a9/0x790 [ 38.734705] ? lock_pin_lock+0x350/0x350 [ 38.738753] ? check_usage_forwards+0x3e0/0x3e0 [ 38.743401] ? __bfs+0x385/0x7a0 [ 38.746745] ? lockdep_on+0x50/0x50 [ 38.750359] ? lock_pin_lock+0x350/0x350 [ 38.754409] ? mark_held_locks+0x130/0x130 [ 38.758651] ? kasan_check_read+0x11/0x20 [ 38.762781] ? __lock_acquire+0x2881/0x4ec0 [ 38.767089] ? mark_held_locks+0x130/0x130 [ 38.771307] ? print_usage_bug+0xc0/0xc0 [ 38.775346] ? _raw_spin_unlock+0x2c/0x50 [ 38.779479] ? graph_lock+0x170/0x170 [ 38.783276] ? ext4_exit_mballoc+0xc0/0xc0 [ 38.787490] ? __lock_acquire+0x7ec/0x4ec0 [ 38.791707] ? find_held_lock+0x36/0x1c0 [ 38.795752] ? mark_held_locks+0x130/0x130 [ 38.799971] ? lock_downgrade+0x900/0x900 [ 38.804099] ? ext4_es_scan+0x960/0x960 [ 38.808055] ? do_raw_write_trylock+0x1c0/0x1c0 [ 38.812706] ? kasan_check_write+0x14/0x20 [ 38.816937] ? lock_acquire+0x1ed/0x520 [ 38.820896] ? integrity_inode_free+0x77/0x320 [ 38.825462] ? ext4_es_remove_extent+0x151/0x500 [ 38.830199] ? lock_release+0x970/0x970 [ 38.834161] ? kasan_check_write+0x14/0x20 [ 38.838375] ? do_raw_write_lock+0xbd/0x1e0 [ 38.842685] integrity_inode_free+0x12f/0x320 [ 38.847192] security_inode_free+0x19/0x90 [ 38.851408] __destroy_inode+0x328/0x820 [ 38.855456] ? generic_update_time+0x450/0x450 [ 38.860020] ? evict+0x5d8/0x980 [ 38.863368] ? lock_downgrade+0x900/0x900 [ 38.867499] ? __inode_wait_for_writeback+0x2cf/0x380 [ 38.872672] destroy_inode+0xda/0x200 [ 38.876462] ? __destroy_inode+0x820/0x820 [ 38.880683] ? kasan_check_write+0x14/0x20 [ 38.884898] ? do_raw_spin_lock+0xc1/0x230 [ 38.889113] evict+0x5e0/0x980 [ 38.892286] ? destroy_inode+0x200/0x200 [ 38.896327] ? iput+0x671/0xa90 [ 38.899604] ? lock_downgrade+0x900/0x900 [ 38.903742] ? kasan_check_read+0x11/0x20 [ 38.907888] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.912457] ? lock_downgrade+0x900/0x900 [ 38.916604] iput+0x679/0xa90 [ 38.919696] ? inode_add_lru+0x2a0/0x2a0 [ 38.923738] ? up_write+0x7b/0x220 [ 38.927255] ? up_read+0x110/0x110 [ 38.930776] ? up_read+0x110/0x110 [ 38.934296] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.939824] ? check_preemption_disabled+0x48/0x280 [ 38.944821] ext4_ioctl+0x236f/0x4210 [ 38.948604] ? ext4_ioctl_group_add+0x560/0x560 [ 38.953257] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 38.959037] ? kasan_check_read+0x11/0x20 [ 38.963164] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.968431] ? rcu_bh_qs+0xc0/0xc0 [ 38.971973] ? unwind_dump+0x190/0x190 [ 38.975842] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.981360] ? avc_has_extended_perms+0xab2/0x15a0 [ 38.986275] ? convert_from_fxsr+0x157/0x7d0 [ 38.990664] ? avc_ss_reset+0x190/0x190 [ 38.994623] ? save_stack+0xa9/0xd0 [ 38.998226] ? save_stack+0x43/0xd0 [ 39.001836] ? __kasan_slab_free+0x102/0x150 [ 39.006220] ? kasan_slab_free+0xe/0x10 [ 39.010177] ? kmem_cache_free+0x83/0x290 [ 39.014301] ? putname+0xf2/0x130 [ 39.017731] ? do_sys_open+0x54d/0x700 [ 39.021602] ? __x64_sys_openat+0x9d/0x100 [ 39.025830] ? do_syscall_64+0x1b9/0x820 [ 39.029871] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.035216] ? ___might_sleep+0x1ed/0x300 [ 39.039350] ? arch_local_save_flags+0x40/0x40 [ 39.043928] ? kasan_check_write+0x14/0x20 [ 39.048157] ? trace_hardirqs_off+0xb8/0x310 [ 39.052550] ? ext4_ioctl_group_add+0x560/0x560 [ 39.057201] do_vfs_ioctl+0x1de/0x1720 [ 39.061071] ? ioctl_preallocate+0x300/0x300 [ 39.065465] ? selinux_file_mprotect+0x620/0x620 [ 39.070202] ? path_openat+0x3a31/0x5160 [ 39.074246] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.079246] ? kmem_cache_free+0x24f/0x290 [ 39.083467] ? putname+0xf7/0x130 [ 39.086900] ? do_syscall_64+0x9a/0x820 [ 39.090855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.096371] ? security_file_ioctl+0x94/0xc0 [ 39.100759] ksys_ioctl+0xa9/0xd0 [ 39.104194] __x64_sys_ioctl+0x73/0xb0 [ 39.108060] do_syscall_64+0x1b9/0x820 [ 39.111929] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.117280] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.122204] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.127027] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.132023] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.137020] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.142021] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.146845] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.152013] RIP: 0033:0x440009 [ 39.155189] 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 [ 39.174069] RSP: 002b:00007fff81a19e98 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 39.181773] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 39.189025] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 39.196275] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 39.203606] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 39.210882] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 39.218154] Modules linked in: [ 39.221414] ---[ end trace 372099a9e578db51 ]--- [ 39.226210] RIP: 0010:rb_erase+0x306/0x3710 [ 39.230780] 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 [ 39.249726] RSP: 0018:ffff8801b8b26918 EFLAGS: 00010202 [ 39.255123] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.262507] RDX: 1ffff10037164d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 39.269883] RBP: ffff8801b8b27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 39.277190] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b0f343b0 [ 39.284502] R13: dffffc0000000000 R14: ffff8801b8b272f8 R15: ffff8801b8b27438 [ 39.291815] FS: 0000000000d88880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 39.300098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.305989] CR2: 0000000020000080 CR3: 00000001b29c6000 CR4: 00000000001406e0 [ 39.313311] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.320608] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.327862] Kernel panic - not syncing: Fatal exception [ 39.334065] Kernel Offset: disabled [ 39.337685] Rebooting in 86400 seconds..