[ 26.742393] audit: type=1800 audit(1539791567.717:27): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 26.764527] audit: type=1800 audit(1539791567.717:28): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 27.949502] audit: type=1800 audit(1539791568.967:29): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.969992] audit: type=1800 audit(1539791568.977:30): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.218196] kasan: CONFIG_KASAN_INLINE enabled [ 54.222903] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.230254] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.236468] CPU: 0 PID: 5398 Comm: syz-executor866 Not tainted 4.19.0-rc8+ #287 [ 54.243890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.253232] RIP: 0010:rb_erase+0x306/0x3710 [ 54.257534] 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 [ 54.276416] RSP: 0018:ffff8801c7d66918 EFLAGS: 00010202 [ 54.281762] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 54.289012] RDX: 1ffff10038facd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 54.296260] RBP: ffff8801c7d67320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 54.303511] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b7226770 [ 54.310761] R13: dffffc0000000000 R14: ffff8801c7d672f8 R15: ffff8801c7d67438 [ 54.318013] FS: 0000000000d46880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 54.326218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.332078] CR2: 0000000020000080 CR3: 00000001d8b68000 CR4: 00000000001406f0 [ 54.339328] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.346576] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.353825] Call Trace: [ 54.356394] ? lockdep_on+0x50/0x50 [ 54.360002] ? rb_insert_color+0x1460/0x1460 [ 54.364392] ? lock_downgrade+0x900/0x900 [ 54.368521] ? noop_count+0x40/0x40 [ 54.372131] ? lock_pin_lock+0x350/0x350 [ 54.376187] ? rcu_bh_qs+0xc0/0xc0 [ 54.379707] ? unwind_dump+0x190/0x190 [ 54.383582] ? kasan_check_read+0x11/0x20 [ 54.387714] ? noop_count+0x40/0x40 [ 54.391332] ? lock_pin_lock+0x350/0x350 [ 54.395388] ? mark_held_locks+0x130/0x130 [ 54.399606] ? check_usage_forwards+0x3e0/0x3e0 [ 54.404256] ? __bfs+0x385/0x7a0 [ 54.407608] ? check_usage+0x1a9/0x790 [ 54.411477] ? lock_pin_lock+0x350/0x350 [ 54.415520] ? check_usage_forwards+0x3e0/0x3e0 [ 54.420170] ? __bfs+0x385/0x7a0 [ 54.423522] ? modules_open+0xa0/0xa0 [ 54.427345] ? lockdep_on+0x50/0x50 [ 54.430957] ? lock_pin_lock+0x350/0x350 [ 54.435005] ? mark_held_locks+0x130/0x130 [ 54.439220] ? kasan_check_read+0x11/0x20 [ 54.443347] ? __lock_acquire+0x2881/0x4ec0 [ 54.447658] ? mark_held_locks+0x130/0x130 [ 54.451875] ? print_usage_bug+0xc0/0xc0 [ 54.455918] ? _raw_spin_unlock+0x2c/0x50 [ 54.460059] ? graph_lock+0x170/0x170 [ 54.463933] ? ext4_exit_mballoc+0xc0/0xc0 [ 54.468161] ? __lock_acquire+0x7ec/0x4ec0 [ 54.472381] ? find_held_lock+0x36/0x1c0 [ 54.476428] ? mark_held_locks+0x130/0x130 [ 54.480669] ? lock_downgrade+0x900/0x900 [ 54.484803] ? ext4_es_scan+0x960/0x960 [ 54.488763] ? do_raw_write_trylock+0x1c0/0x1c0 [ 54.493417] ? kasan_check_write+0x14/0x20 [ 54.497633] ? lock_acquire+0x1ed/0x520 [ 54.501598] ? integrity_inode_free+0x77/0x320 [ 54.506177] ? ext4_es_remove_extent+0x151/0x500 [ 54.510921] ? lock_release+0x970/0x970 [ 54.514881] ? kasan_check_write+0x14/0x20 [ 54.519095] ? do_raw_write_lock+0xbd/0x1b0 [ 54.523532] integrity_inode_free+0x12f/0x320 [ 54.528014] security_inode_free+0x19/0x90 [ 54.532236] __destroy_inode+0x328/0x820 [ 54.536306] ? generic_update_time+0x450/0x450 [ 54.540870] ? evict+0x5d8/0x980 [ 54.544226] ? lock_downgrade+0x900/0x900 [ 54.548354] ? __inode_wait_for_writeback+0x2cf/0x380 [ 54.553543] destroy_inode+0xda/0x200 [ 54.557339] ? __destroy_inode+0x820/0x820 [ 54.561570] ? kasan_check_write+0x14/0x20 [ 54.565790] ? do_raw_spin_lock+0xc1/0x200 [ 54.570003] evict+0x5e0/0x980 [ 54.573178] ? destroy_inode+0x200/0x200 [ 54.577250] ? iput+0x671/0xa90 [ 54.580525] ? lock_downgrade+0x900/0x900 [ 54.584669] ? kasan_check_read+0x11/0x20 [ 54.588805] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 54.593371] ? lock_downgrade+0x900/0x900 [ 54.597505] iput+0x679/0xa90 [ 54.600611] ? inode_add_lru+0x2a0/0x2a0 [ 54.604666] ? up_write+0x7b/0x220 [ 54.608199] ? up_read+0x110/0x110 [ 54.611729] ? up_read+0x110/0x110 [ 54.615257] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.620856] ? check_preemption_disabled+0x48/0x200 [ 54.625865] ext4_ioctl+0x236f/0x4210 [ 54.629696] ? is_bpf_text_address+0xac/0x170 [ 54.634198] ? ext4_ioctl_group_add+0x560/0x560 [ 54.638855] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 54.644637] ? kasan_check_read+0x11/0x20 [ 54.648765] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.654024] ? rcu_bh_qs+0xc0/0xc0 [ 54.657547] ? rcu_bh_qs+0xc0/0xc0 [ 54.661068] ? unwind_dump+0x190/0x190 [ 54.664941] ? is_bpf_text_address+0xd3/0x170 [ 54.669416] ? kernel_text_address+0x79/0xf0 [ 54.673806] ? __kernel_text_address+0xd/0x40 [ 54.678282] ? unwind_get_return_address+0x61/0xa0 [ 54.683195] ? __save_stack_trace+0x8d/0xf0 [ 54.687500] ? save_stack+0xa9/0xd0 [ 54.691108] ? save_stack+0x43/0xd0 [ 54.694733] ? __kasan_slab_free+0x102/0x150 [ 54.699126] ? kasan_slab_free+0xe/0x10 [ 54.703088] ? kmem_cache_free+0x83/0x290 [ 54.707216] ? putname+0xf2/0x130 [ 54.710658] ? do_sys_open+0x54d/0x700 [ 54.714537] ? __x64_sys_openat+0x9d/0x100 [ 54.718753] ? do_syscall_64+0x1b9/0x820 [ 54.722798] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.728148] ? trace_hardirqs_off+0xb8/0x310 [ 54.732539] ? kasan_check_read+0x11/0x20 [ 54.736669] ? do_raw_spin_unlock+0xa7/0x2f0 [ 54.741060] ? trace_hardirqs_on+0x310/0x310 [ 54.745453] ? kasan_check_write+0x14/0x20 [ 54.749675] ? trace_hardirqs_off+0xb8/0x310 [ 54.754067] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.759587] ? check_preemption_disabled+0x48/0x200 [ 54.764586] ? check_preemption_disabled+0x48/0x200 [ 54.769588] ? ext4_ioctl_group_add+0x560/0x560 [ 54.774246] do_vfs_ioctl+0x1de/0x1720 [ 54.778118] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.783376] ? ioctl_preallocate+0x300/0x300 [ 54.787774] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.793299] ? __fget_light+0x2e9/0x430 [ 54.797255] ? fget_raw+0x20/0x20 [ 54.800688] ? putname+0xf2/0x130 [ 54.804120] ? rcu_read_lock_sched_held+0x108/0x120 [ 54.809119] ? kmem_cache_free+0x24f/0x290 [ 54.813336] ? putname+0xf7/0x130 [ 54.816776] ? do_syscall_64+0x9a/0x820 [ 54.820740] ? do_syscall_64+0x9a/0x820 [ 54.824695] ? lockdep_hardirqs_on+0x421/0x5c0 [ 54.829264] ? security_file_ioctl+0x94/0xc0 [ 54.833655] ksys_ioctl+0xa9/0xd0 [ 54.837091] __x64_sys_ioctl+0x73/0xb0 [ 54.840961] do_syscall_64+0x1b9/0x820 [ 54.844833] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.850325] ? syscall_return_slowpath+0x5e0/0x5e0 [ 54.855238] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.860059] ? trace_hardirqs_on_caller+0x310/0x310 [ 54.865059] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 54.870059] ? prepare_exit_to_usermode+0x291/0x3b0 [ 54.875058] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.879889] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.885063] RIP: 0033:0x440009 [ 54.888238] 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 [ 54.907199] RSP: 002b:00007ffe84b08dd8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 54.914898] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 54.922153] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 54.929403] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 54.936652] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 54.943904] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 54.951158] Modules linked in: [ 54.954441] ---[ end trace 5f3f06fe0e40fbad ]--- [ 54.959219] RIP: 0010:rb_erase+0x306/0x3710 [ 54.963626] 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 [ 54.982560] RSP: 0018:ffff8801c7d66918 EFLAGS: 00010202 [ 54.987924] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 54.995302] RDX: 1ffff10038facd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 55.002606] RBP: ffff8801c7d67320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 55.009872] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b7226770 [ 55.017158] R13: dffffc0000000000 R14: ffff8801c7d672f8 R15: ffff8801c7d67438 [ 55.024527] FS: 0000000000d46880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 55.032797] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.038676] CR2: 0000000020000080 CR3: 00000001d8b68000 CR4: 00000000001406f0 [ 55.045970] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.053266] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.060585] Kernel panic - not syncing: Fatal exception [ 55.066846] Kernel Offset: disabled [ 55.070467] Rebooting in 86400 seconds..