Starting mcstransd: [....] Starting file context mai[ 31.086020] ssh (5401) used greatest stack depth: 15688 bytes left ntaining daemon: restorecond[?2[ 31.095412] audit: type=1800 audit(1537919146.063:33): pid=5340 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 [ 31.118590] audit: type=1800 audit(1537919146.073:34): pid=5340 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 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.025902] audit: type=1400 audit(1537919148.993:35): avc: denied { map } for pid=5516 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 '10.128.0.107' (ECDSA) to the list of known hosts. executing program [ 40.689119] audit: type=1400 audit(1537919155.653:36): avc: denied { map } for pid=5530 comm="syz-executor136" path="/root/syz-executor136944104" 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 [ 40.694608] kasan: CONFIG_KASAN_INLINE enabled [ 40.720194] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.727560] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.733778] CPU: 1 PID: 5530 Comm: syz-executor136 Not tainted 4.19.0-rc5+ #33 [ 40.741123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.750463] RIP: 0010:rb_erase+0x306/0x3710 [ 40.754769] 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 [ 40.773669] RSP: 0018:ffff8801c2e0e918 EFLAGS: 00010202 [ 40.779017] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.786269] RDX: 1ffff100385c1d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 40.793520] RBP: ffff8801c2e0f320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 40.800768] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b1f963f0 [ 40.808031] R13: dffffc0000000000 R14: ffff8801c2e0f2f8 R15: ffff8801c2e0f438 [ 40.815388] FS: 00000000007b2880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 40.823595] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.829454] CR2: 0000000020000540 CR3: 00000001c4e30000 CR4: 00000000001406e0 [ 40.836703] Call Trace: [ 40.839300] ? lockdep_on+0x50/0x50 [ 40.842922] ? rb_insert_color+0x1460/0x1460 [ 40.847326] ? noop_count+0x40/0x40 [ 40.850937] ? lock_pin_lock+0x350/0x350 [ 40.854980] ? noop_count+0x40/0x40 [ 40.858589] ? kasan_check_read+0x11/0x20 [ 40.862735] ? noop_count+0x40/0x40 [ 40.866346] ? noop_count+0x40/0x40 [ 40.869960] ? lock_pin_lock+0x350/0x350 [ 40.874028] ? mark_held_locks+0x130/0x130 [ 40.878246] ? check_usage_forwards+0x3e0/0x3e0 [ 40.882898] ? __bfs+0x385/0x7a0 [ 40.886244] ? noop_count+0x40/0x40 [ 40.889857] ? check_usage+0x1a9/0x790 [ 40.893768] ? lock_pin_lock+0x350/0x350 [ 40.897811] ? check_usage_forwards+0x3e0/0x3e0 [ 40.902461] ? __bfs+0x385/0x7a0 [ 40.905807] ? __lock_acquire+0x7ec/0x4ec0 [ 40.910026] ? lockdep_on+0x50/0x50 [ 40.913634] ? lock_pin_lock+0x350/0x350 [ 40.917680] ? mark_held_locks+0x130/0x130 [ 40.921897] ? kasan_check_read+0x11/0x20 [ 40.926026] ? __lock_acquire+0x2881/0x4ec0 [ 40.930352] ? mark_held_locks+0x130/0x130 [ 40.934587] ? print_usage_bug+0xc0/0xc0 [ 40.938634] ? _raw_spin_unlock+0x2c/0x50 [ 40.942780] ? graph_lock+0x170/0x170 [ 40.946565] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.950785] ? __lock_acquire+0x7ec/0x4ec0 [ 40.955000] ? find_held_lock+0x36/0x1c0 [ 40.959043] ? mark_held_locks+0x130/0x130 [ 40.963312] ? lock_downgrade+0x900/0x900 [ 40.967445] ? ext4_es_scan+0x960/0x960 [ 40.971403] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.976055] ? kasan_check_write+0x14/0x20 [ 40.980293] ? lock_acquire+0x1ed/0x520 [ 40.984251] ? integrity_inode_free+0x77/0x320 [ 40.988818] ? ext4_es_remove_extent+0x151/0x500 [ 40.993562] ? lock_release+0x970/0x970 [ 40.997521] ? kasan_check_write+0x14/0x20 [ 41.001740] ? do_raw_write_lock+0xbd/0x1b0 [ 41.006044] integrity_inode_free+0x12f/0x320 [ 41.010528] security_inode_free+0x19/0x90 [ 41.014747] __destroy_inode+0x328/0x820 [ 41.018800] ? generic_update_time+0x450/0x450 [ 41.023379] ? evict+0x5d8/0x980 [ 41.026725] ? lock_downgrade+0x900/0x900 [ 41.030859] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.036029] destroy_inode+0xda/0x200 [ 41.039823] ? __destroy_inode+0x820/0x820 [ 41.044042] ? kasan_check_write+0x14/0x20 [ 41.048260] ? do_raw_spin_lock+0xc1/0x200 [ 41.052476] evict+0x5e0/0x980 [ 41.055649] ? destroy_inode+0x200/0x200 [ 41.059701] ? iput+0x671/0xa90 [ 41.063006] ? lock_downgrade+0x900/0x900 [ 41.067151] ? kasan_check_read+0x11/0x20 [ 41.071297] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.075861] ? lock_downgrade+0x900/0x900 [ 41.080005] iput+0x679/0xa90 [ 41.083106] ? inode_add_lru+0x2a0/0x2a0 [ 41.087149] ? up_write+0x7b/0x220 [ 41.090671] ? up_read+0x110/0x110 [ 41.094203] ? up_read+0x110/0x110 [ 41.097736] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.103257] ? check_preemption_disabled+0x48/0x200 [ 41.108261] ext4_ioctl+0x236f/0x4210 [ 41.112045] ? ext4_ioctl_group_add+0x560/0x560 [ 41.116699] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.122474] ? kasan_check_read+0x11/0x20 [ 41.126601] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.131866] ? rcu_bh_qs+0xc0/0xc0 [ 41.135387] ? rcu_bh_qs+0xc0/0xc0 [ 41.138914] ? unwind_dump+0x190/0x190 [ 41.142802] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.148323] ? avc_has_extended_perms+0xab2/0x15a0 [ 41.153252] ? avc_ss_reset+0x190/0x190 [ 41.157206] ? save_stack+0xa9/0xd0 [ 41.160811] ? save_stack+0x43/0xd0 [ 41.164415] ? __kasan_slab_free+0x102/0x150 [ 41.168833] ? kasan_slab_free+0xe/0x10 [ 41.172796] ? kmem_cache_free+0x83/0x290 [ 41.176931] ? putname+0xf2/0x130 [ 41.180364] ? do_sys_open+0x54d/0x700 [ 41.184257] ? __x64_sys_open+0x7e/0xc0 [ 41.188226] ? do_syscall_64+0x1b9/0x820 [ 41.192270] ? kasan_check_read+0x11/0x20 [ 41.196400] ? ___might_sleep+0x1ed/0x300 [ 41.200532] ? arch_local_save_flags+0x40/0x40 [ 41.205113] ? kasan_check_write+0x14/0x20 [ 41.209349] ? trace_hardirqs_off+0xb8/0x310 [ 41.213759] ? ext4_ioctl_group_add+0x560/0x560 [ 41.218423] do_vfs_ioctl+0x1de/0x1720 [ 41.222306] ? ioctl_preallocate+0x300/0x300 [ 41.226710] ? selinux_file_mprotect+0x620/0x620 [ 41.231461] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.236472] ? kmem_cache_free+0x18b/0x290 [ 41.240687] ? putname+0xf7/0x130 [ 41.244127] ? do_syscall_64+0x9a/0x820 [ 41.248090] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.253613] ? security_file_ioctl+0x94/0xc0 [ 41.258002] ksys_ioctl+0xa9/0xd0 [ 41.261440] __x64_sys_ioctl+0x73/0xb0 [ 41.265324] do_syscall_64+0x1b9/0x820 [ 41.269215] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.274571] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.279484] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.284330] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.289341] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.294367] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.299366] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.304192] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.309358] RIP: 0033:0x440029 [ 41.312534] 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 [ 41.331419] RSP: 002b:00007ffff52c6308 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 41.339121] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 41.346388] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000004 [ 41.353638] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.360889] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018b0 [ 41.368139] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 41.375389] Modules linked in: [ 41.379021] ---[ end trace 1342404da6f38e51 ]--- [ 41.383848] RIP: 0010:rb_erase+0x306/0x3710 [ 41.388172] 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 [ 41.407092] RSP: 0018:ffff8801c2e0e918 EFLAGS: 00010202 [ 41.412479] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.419777] RDX: 1ffff100385c1d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 41.427081] RBP: ffff8801c2e0f320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 41.434364] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b1f963f0 [ 41.441650] R13: dffffc0000000000 R14: ffff8801c2e0f2f8 R15: ffff8801c2e0f438 [ 41.448923] FS: 00000000007b2880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 41.457161] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.463057] CR2: 0000000020000540 CR3: 00000001c4e30000 CR4: 00000000001406e0 [ 41.470562] Kernel panic - not syncing: Fatal exception [ 41.476775] Kernel Offset: disabled [ 41.480438] Rebooting in 86400 seconds..