[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.237169] audit: type=1800 audit(1539199741.377:25): pid=5653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.261988] audit: type=1800 audit(1539199741.377:26): pid=5653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.285616] audit: type=1800 audit(1539199741.377:27): pid=5653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.349955] kasan: CONFIG_KASAN_INLINE enabled [ 57.354689] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 57.362189] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 57.368421] CPU: 1 PID: 5806 Comm: syz-executor785 Not tainted 4.19.0-rc6+ #136 [ 57.375870] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.385230] RIP: 0010:rb_erase+0x306/0x3710 [ 57.389534] 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 [ 57.408425] RSP: 0018:ffff8801bbdfe918 EFLAGS: 00010202 [ 57.413783] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 57.421037] RDX: 1ffff100377bfd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 57.428294] RBP: ffff8801bbdff320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 57.435560] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93151f0 [ 57.442816] R13: dffffc0000000000 R14: ffff8801bbdff2f8 R15: ffff8801bbdff438 [ 57.450073] FS: 0000000001014880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 57.458282] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.464269] CR2: 0000000020000080 CR3: 00000001bc1e5000 CR4: 00000000001406e0 [ 57.471577] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.478838] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.486090] Call Trace: [ 57.488666] ? rb_insert_color+0x1460/0x1460 [ 57.493064] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 57.497980] ? lock_downgrade+0x900/0x900 [ 57.502320] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.508109] ? mark_held_locks+0x130/0x130 [ 57.512431] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.517697] ? rcu_bh_qs+0xc0/0xc0 [ 57.521220] ? unwind_dump+0x190/0x190 [ 57.525091] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 57.530614] ? mark_held_locks+0x130/0x130 [ 57.534833] ? mark_page_accessed+0xcb0/0x2040 [ 57.539397] ? activate_page+0x1040/0x1040 [ 57.543613] ? activate_page+0x1040/0x1040 [ 57.547838] ? mark_held_locks+0x130/0x130 [ 57.552052] ? kasan_kmalloc+0xc7/0xe0 [ 57.555937] ? kmem_cache_alloc_trace+0x152/0x750 [ 57.560768] ? ima_add_digest_entry+0xcb/0x6a0 [ 57.565450] ? ima_add_template_entry+0x466/0x7f0 [ 57.570324] ? ima_store_template+0x224/0x310 [ 57.574811] ? mark_held_locks+0x130/0x130 [ 57.579040] ? find_get_pages_contig+0x15b0/0x15b0 [ 57.583961] ? mark_held_locks+0x130/0x130 [ 57.588181] ? lock_downgrade+0x900/0x900 [ 57.592422] ? mark_held_locks+0x130/0x130 [ 57.596646] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.602429] ? mark_held_locks+0x130/0x130 [ 57.606721] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 57.612070] ? lock_downgrade+0x900/0x900 [ 57.616265] ? kasan_check_read+0x11/0x20 [ 57.620402] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.624793] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.629356] ? mark_held_locks+0x130/0x130 [ 57.633582] ? _raw_spin_unlock+0x2c/0x50 [ 57.637718] ? ext4_discard_preallocations+0x18a/0x13c0 [ 57.643064] ? ext4_exit_mballoc+0xc0/0xc0 [ 57.647282] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 57.652293] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 57.657038] ? modules_open+0xa0/0xa0 [ 57.660820] ? __es_tree_search.isra.12+0x1ba/0x220 [ 57.665819] ? __es_remove_extent+0x9a3/0xba0 [ 57.670297] ? mark_held_locks+0x130/0x130 [ 57.674514] ? lock_downgrade+0x900/0x900 [ 57.678697] ? ext4_es_scan+0x960/0x960 [ 57.682663] ? lock_release+0x970/0x970 [ 57.686621] ? trace_hardirqs_on+0xbd/0x310 [ 57.690928] ? kasan_check_read+0x11/0x20 [ 57.695055] ? clear_inode+0x114/0x3a0 [ 57.698925] ? do_raw_write_trylock+0x1c0/0x1c0 [ 57.703579] ? kasan_check_write+0x14/0x20 [ 57.707795] ? lock_acquire+0x1ed/0x520 [ 57.711750] ? integrity_inode_free+0x77/0x320 [ 57.716312] ? ext4_es_remove_extent+0x151/0x500 [ 57.721047] ? lock_release+0x970/0x970 [ 57.725003] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 57.730085] ? depot_save_stack+0x292/0x470 [ 57.734390] ? kasan_check_write+0x14/0x20 [ 57.738607] ? do_raw_write_lock+0xbd/0x1b0 [ 57.742914] integrity_inode_free+0x12f/0x320 [ 57.747393] security_inode_free+0x19/0x90 [ 57.751610] __destroy_inode+0x328/0x820 [ 57.755655] ? generic_update_time+0x450/0x450 [ 57.760217] ? evict+0x5d8/0x980 [ 57.763569] ? lock_downgrade+0x900/0x900 [ 57.767704] ? __inode_wait_for_writeback+0x2cf/0x380 [ 57.772881] destroy_inode+0xda/0x200 [ 57.776713] ? __destroy_inode+0x820/0x820 [ 57.780936] ? kasan_check_write+0x14/0x20 [ 57.785169] ? do_raw_spin_lock+0xc1/0x200 [ 57.789446] evict+0x5e0/0x980 [ 57.792623] ? jbd2_journal_stop+0x430/0x15d0 [ 57.797104] ? destroy_inode+0x200/0x200 [ 57.801168] ? do_raw_spin_lock+0xc1/0x200 [ 57.805397] ? iput+0x671/0xa90 [ 57.808657] ? lock_downgrade+0x900/0x900 [ 57.812790] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 57.818420] ? kasan_check_read+0x11/0x20 [ 57.822558] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.827126] ? lock_downgrade+0x900/0x900 [ 57.831277] ? ext4_ioctl+0x231b/0x4210 [ 57.835257] iput+0x679/0xa90 [ 57.838354] ? inode_add_lru+0x2a0/0x2a0 [ 57.842399] ? up_write+0x7b/0x220 [ 57.845931] ? up_read+0x110/0x110 [ 57.849596] ? up_read+0x110/0x110 [ 57.853121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.858643] ? check_preemption_disabled+0x48/0x200 [ 57.863645] ext4_ioctl+0x236f/0x4210 [ 57.867436] ? is_bpf_text_address+0xac/0x170 [ 57.871917] ? ext4_ioctl_group_add+0x560/0x560 [ 57.876645] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.882429] ? kasan_check_read+0x11/0x20 [ 57.886572] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.891834] ? rcu_bh_qs+0xc0/0xc0 [ 57.895354] ? unwind_dump+0x190/0x190 [ 57.899231] ? is_bpf_text_address+0xd3/0x170 [ 57.903717] ? kernel_text_address+0x79/0xf0 [ 57.908111] ? __kernel_text_address+0xd/0x40 [ 57.912598] ? unwind_get_return_address+0x61/0xa0 [ 57.917520] ? __save_stack_trace+0x8d/0xf0 [ 57.921828] ? save_stack+0xa9/0xd0 [ 57.925442] ? save_stack+0x43/0xd0 [ 57.929151] ? __kasan_slab_free+0x102/0x150 [ 57.933541] ? kasan_slab_free+0xe/0x10 [ 57.937507] ? kmem_cache_free+0x83/0x290 [ 57.941637] ? putname+0xf2/0x130 [ 57.945070] ? do_sys_open+0x54d/0x700 [ 57.948939] ? __x64_sys_openat+0x9d/0x100 [ 57.953226] ? do_syscall_64+0x1b9/0x820 [ 57.957280] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.962628] ? trace_hardirqs_off+0xb8/0x310 [ 57.967017] ? kasan_check_read+0x11/0x20 [ 57.971146] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.975542] ? trace_hardirqs_on+0x310/0x310 [ 57.979945] ? kasan_check_write+0x14/0x20 [ 57.984169] ? trace_hardirqs_off+0xb8/0x310 [ 57.988571] ? trace_hardirqs_on+0x310/0x310 [ 57.992976] ? ext4_ioctl_group_add+0x560/0x560 [ 57.997707] do_vfs_ioctl+0x1de/0x1720 [ 58.001591] ? trace_hardirqs_on+0xbd/0x310 [ 58.005905] ? ioctl_preallocate+0x300/0x300 [ 58.010312] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.015831] ? __fget_light+0x2e9/0x430 [ 58.019864] ? fget_raw+0x20/0x20 [ 58.023306] ? putname+0xf2/0x130 [ 58.026747] ? kmem_cache_free+0x21a/0x290 [ 58.030964] ? putname+0xf7/0x130 [ 58.034624] ? security_file_ioctl+0x94/0xc0 [ 58.039019] ksys_ioctl+0xa9/0xd0 [ 58.042458] __x64_sys_ioctl+0x73/0xb0 [ 58.046366] do_syscall_64+0x1b9/0x820 [ 58.050242] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 58.055589] ? syscall_return_slowpath+0x5e0/0x5e0 [ 58.060501] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 58.065328] ? trace_hardirqs_on_caller+0x310/0x310 [ 58.070636] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 58.075643] ? prepare_exit_to_usermode+0x291/0x3b0 [ 58.080648] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 58.085476] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.090656] RIP: 0033:0x440009 [ 58.093830] 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 [ 58.112829] RSP: 002b:00007ffd29d2fdc8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 58.120522] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 58.127779] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 58.135030] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 58.142378] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 58.149814] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 58.157067] Modules linked in: [ 58.160359] ---[ end trace 6d7c96ae645508d2 ]--- [ 58.165185] RIP: 0010:rb_erase+0x306/0x3710 [ 58.170101] 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 [ 58.189236] RSP: 0018:ffff8801bbdfe918 EFLAGS: 00010202 [ 58.194605] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.202103] RDX: 1ffff100377bfd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 58.209413] RBP: ffff8801bbdff320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 58.216698] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93151f0 [ 58.224000] R13: dffffc0000000000 R14: ffff8801bbdff2f8 R15: ffff8801bbdff438 [ 58.231300] FS: 0000000001014880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 58.239543] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.245495] CR2: 0000000020000080 CR3: 00000001bc1e5000 CR4: 00000000001406e0 [ 58.252794] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.260182] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.267469] Kernel panic - not syncing: Fatal exception [ 58.273682] Kernel Offset: disabled [ 58.277318] Rebooting in 86400 seconds..