[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 31.831154] audit: type=1800 audit(1539053547.654:25): pid=5634 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 31.857293] audit: type=1800 audit(1539053547.654:26): pid=5634 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 31.877106] audit: type=1800 audit(1539053547.654:27): pid=5634 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 '10.128.0.115' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.214028] kasan: CONFIG_KASAN_INLINE enabled [ 57.218721] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 57.226115] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 57.232347] CPU: 0 PID: 5788 Comm: syz-executor399 Not tainted 4.19.0-rc7+ #274 [ 57.239771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.249114] RIP: 0010:rb_erase+0x306/0x3710 [ 57.253420] 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 [ 57.272319] RSP: 0018:ffff8801bc24e918 EFLAGS: 00010202 [ 57.277676] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 57.284925] RDX: 1ffff10037849d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 57.292199] RBP: ffff8801bc24f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 57.299449] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c4807370 [ 57.306698] R13: dffffc0000000000 R14: ffff8801bc24f2f8 R15: ffff8801bc24f438 [ 57.313952] FS: 000000000095a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 57.322166] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.328026] CR2: 0000000020000080 CR3: 00000001c43cc000 CR4: 00000000001406f0 [ 57.335275] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.342524] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.349788] Call Trace: [ 57.352361] ? rb_insert_color+0x1460/0x1460 [ 57.356756] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 57.361670] ? lock_downgrade+0x900/0x900 [ 57.365800] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.371582] ? mark_held_locks+0x130/0x130 [ 57.375798] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.381056] ? rcu_bh_qs+0xc0/0xc0 [ 57.384577] ? unwind_dump+0x190/0x190 [ 57.388451] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 57.393978] ? mark_held_locks+0x130/0x130 [ 57.398192] ? mark_page_accessed+0xcb0/0x2040 [ 57.402751] ? activate_page+0x1040/0x1040 [ 57.406972] ? activate_page+0x1040/0x1040 [ 57.411204] ? mark_held_locks+0x130/0x130 [ 57.415426] ? kasan_kmalloc+0xc7/0xe0 [ 57.419295] ? kmem_cache_alloc_trace+0x152/0x750 [ 57.424120] ? ima_add_digest_entry+0xcb/0x6a0 [ 57.428680] ? ima_add_template_entry+0x466/0x7f0 [ 57.433504] ? ima_store_template+0x224/0x310 [ 57.437980] ? mark_held_locks+0x130/0x130 [ 57.442197] ? find_get_pages_contig+0x15b0/0x15b0 [ 57.447120] ? mark_held_locks+0x130/0x130 [ 57.451334] ? lock_downgrade+0x900/0x900 [ 57.455551] ? mark_held_locks+0x130/0x130 [ 57.459778] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.465560] ? mark_held_locks+0x130/0x130 [ 57.469812] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 57.475159] ? lock_downgrade+0x900/0x900 [ 57.479290] ? kasan_check_read+0x11/0x20 [ 57.483426] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.487825] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.492470] ? mark_held_locks+0x130/0x130 [ 57.496692] ? _raw_spin_unlock+0x2c/0x50 [ 57.500823] ? ext4_discard_preallocations+0x18a/0x13c0 [ 57.506167] ? ext4_exit_mballoc+0xc0/0xc0 [ 57.510405] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 57.515408] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 57.520160] ? modules_open+0xa0/0xa0 [ 57.523951] ? __es_tree_search.isra.12+0x1ba/0x220 [ 57.528963] ? __es_remove_extent+0x9a3/0xba0 [ 57.533441] ? mark_held_locks+0x130/0x130 [ 57.537669] ? lock_downgrade+0x900/0x900 [ 57.541826] ? ext4_es_scan+0x960/0x960 [ 57.545796] ? lock_release+0x970/0x970 [ 57.549752] ? trace_hardirqs_on+0xbd/0x310 [ 57.554054] ? kasan_check_read+0x11/0x20 [ 57.558182] ? clear_inode+0x114/0x3a0 [ 57.562053] ? do_raw_write_trylock+0x1c0/0x1c0 [ 57.566700] ? kasan_check_write+0x14/0x20 [ 57.570915] ? lock_acquire+0x1ed/0x520 [ 57.574866] ? integrity_inode_free+0x77/0x320 [ 57.579426] ? ext4_es_remove_extent+0x151/0x500 [ 57.584178] ? lock_release+0x970/0x970 [ 57.588131] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 57.593217] ? depot_save_stack+0x292/0x470 [ 57.597516] ? kasan_check_write+0x14/0x20 [ 57.601727] ? do_raw_write_lock+0xbd/0x1b0 [ 57.606037] integrity_inode_free+0x12f/0x320 [ 57.610519] security_inode_free+0x19/0x90 [ 57.614733] __destroy_inode+0x328/0x820 [ 57.618781] ? generic_update_time+0x450/0x450 [ 57.623344] ? evict+0x5d8/0x980 [ 57.626692] ? lock_downgrade+0x900/0x900 [ 57.630835] ? __inode_wait_for_writeback+0x2cf/0x380 [ 57.636007] destroy_inode+0xda/0x200 [ 57.639785] ? __destroy_inode+0x820/0x820 [ 57.644000] ? kasan_check_write+0x14/0x20 [ 57.648272] ? do_raw_spin_lock+0xc1/0x200 [ 57.652503] evict+0x5e0/0x980 [ 57.655677] ? jbd2_journal_stop+0x430/0x15d0 [ 57.660216] ? destroy_inode+0x200/0x200 [ 57.664282] ? do_raw_spin_lock+0xc1/0x200 [ 57.668498] ? iput+0x671/0xa90 [ 57.671773] ? lock_downgrade+0x900/0x900 [ 57.675901] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 57.681418] ? kasan_check_read+0x11/0x20 [ 57.685547] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.690121] ? lock_downgrade+0x900/0x900 [ 57.694249] ? ext4_ioctl+0x231b/0x4210 [ 57.698218] iput+0x679/0xa90 [ 57.701311] ? inode_add_lru+0x2a0/0x2a0 [ 57.705359] ? up_write+0x7b/0x220 [ 57.708885] ? up_read+0x110/0x110 [ 57.712404] ? up_read+0x110/0x110 [ 57.715939] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.721469] ? check_preemption_disabled+0x48/0x200 [ 57.726469] ext4_ioctl+0x236f/0x4210 [ 57.730265] ? is_bpf_text_address+0xac/0x170 [ 57.734740] ? ext4_ioctl_group_add+0x560/0x560 [ 57.739388] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.745165] ? kasan_check_read+0x11/0x20 [ 57.749296] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.754553] ? rcu_bh_qs+0xc0/0xc0 [ 57.758082] ? unwind_dump+0x190/0x190 [ 57.761954] ? is_bpf_text_address+0xd3/0x170 [ 57.766459] ? kernel_text_address+0x79/0xf0 [ 57.771057] ? __kernel_text_address+0xd/0x40 [ 57.775554] ? unwind_get_return_address+0x61/0xa0 [ 57.780476] ? __save_stack_trace+0x8d/0xf0 [ 57.784781] ? save_stack+0xa9/0xd0 [ 57.788386] ? save_stack+0x43/0xd0 [ 57.791994] ? __kasan_slab_free+0x102/0x150 [ 57.796379] ? kasan_slab_free+0xe/0x10 [ 57.800331] ? kmem_cache_free+0x83/0x290 [ 57.804457] ? putname+0xf2/0x130 [ 57.807903] ? do_sys_open+0x54d/0x700 [ 57.812038] ? __x64_sys_openat+0x9d/0x100 [ 57.816260] ? do_syscall_64+0x1b9/0x820 [ 57.820301] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.825663] ? trace_hardirqs_off+0xb8/0x310 [ 57.830051] ? kasan_check_read+0x11/0x20 [ 57.834196] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.838600] ? trace_hardirqs_on+0x310/0x310 [ 57.843014] ? kasan_check_write+0x14/0x20 [ 57.847227] ? trace_hardirqs_off+0xb8/0x310 [ 57.851727] ? trace_hardirqs_on+0x310/0x310 [ 57.856121] ? ext4_ioctl_group_add+0x560/0x560 [ 57.860770] do_vfs_ioctl+0x1de/0x1720 [ 57.864762] ? trace_hardirqs_on+0xbd/0x310 [ 57.869073] ? ioctl_preallocate+0x300/0x300 [ 57.873464] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.878998] ? __fget_light+0x2e9/0x430 [ 57.883065] ? fget_raw+0x20/0x20 [ 57.886514] ? putname+0xf2/0x130 [ 57.889964] ? kmem_cache_free+0x21a/0x290 [ 57.894206] ? putname+0xf7/0x130 [ 57.897644] ? security_file_ioctl+0x94/0xc0 [ 57.902161] ksys_ioctl+0xa9/0xd0 [ 57.905600] __x64_sys_ioctl+0x73/0xb0 [ 57.909467] do_syscall_64+0x1b9/0x820 [ 57.913334] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 57.918678] ? syscall_return_slowpath+0x5e0/0x5e0 [ 57.923714] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.928554] ? trace_hardirqs_on_caller+0x310/0x310 [ 57.933554] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 57.938554] ? prepare_exit_to_usermode+0x291/0x3b0 [ 57.943551] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.948376] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.953544] RIP: 0033:0x440009 [ 57.956735] 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 [ 57.975832] RSP: 002b:00007ffd6bf33cb8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 57.983520] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 57.990766] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 57.998014] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 58.005379] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 58.012634] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 58.019899] Modules linked in: [ 58.023248] ---[ end trace 44a246fbceaae2e1 ]--- [ 58.028021] RIP: 0010:rb_erase+0x306/0x3710 [ 58.032352] 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 [ 58.051265] RSP: 0018:ffff8801bc24e918 EFLAGS: 00010202 [ 58.056613] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.063923] RDX: 1ffff10037849d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 58.071202] RBP: ffff8801bc24f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 58.078587] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c4807370 [ 58.085915] R13: dffffc0000000000 R14: ffff8801bc24f2f8 R15: ffff8801bc24f438 [ 58.093313] FS: 000000000095a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 58.101564] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.107434] CR2: 0000000020000080 CR3: 00000001c43cc000 CR4: 00000000001406f0 [ 58.114735] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.122121] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.130355] Kernel panic - not syncing: Fatal exception [ 58.138277] Kernel Offset: disabled [ 58.141945] Rebooting in 86400 seconds..