[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 26.530607] kauditd_printk_skb: 7 callbacks suppressed [ 26.530621] audit: type=1800 audit(1539929643.875:29): pid=5215 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.555994] audit: type=1800 audit(1539929643.875:30): pid=5215 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.694130] kasan: CONFIG_KASAN_INLINE enabled [ 46.698788] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.706188] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.712425] CPU: 0 PID: 5373 Comm: syz-executor757 Not tainted 4.19.0-rc8+ #67 [ 46.719764] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.729107] RIP: 0010:rb_erase+0x306/0x3710 [ 46.733423] 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 [ 46.752304] RSP: 0018:ffff8801ba816918 EFLAGS: 00010202 [ 46.757662] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.764911] RDX: 1ffff10037502d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 46.772160] RBP: ffff8801ba817320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 46.779419] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c3c07270 [ 46.786683] R13: dffffc0000000000 R14: ffff8801ba8172f8 R15: ffff8801ba817438 [ 46.793945] FS: 0000000001f9d880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.802162] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.808026] CR2: 00000000200000c0 CR3: 00000001d7dc7000 CR4: 00000000001406f0 [ 46.815290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.822540] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.829788] Call Trace: [ 46.832365] ? lockdep_on+0x50/0x50 [ 46.835976] ? rb_insert_color+0x1460/0x1460 [ 46.840365] ? lock_downgrade+0x900/0x900 [ 46.844493] ? noop_count+0x40/0x40 [ 46.848100] ? lock_pin_lock+0x350/0x350 [ 46.852144] ? rcu_bh_qs+0xc0/0xc0 [ 46.855666] ? unwind_dump+0x190/0x190 [ 46.859544] ? kasan_check_read+0x11/0x20 [ 46.863672] ? noop_count+0x40/0x40 [ 46.867281] ? lock_pin_lock+0x350/0x350 [ 46.871324] ? mark_held_locks+0x130/0x130 [ 46.875541] ? check_usage_forwards+0x3e0/0x3e0 [ 46.880206] ? __bfs+0x385/0x7a0 [ 46.883557] ? check_usage+0x1a9/0x790 [ 46.887424] ? lock_pin_lock+0x350/0x350 [ 46.891469] ? check_usage_forwards+0x3e0/0x3e0 [ 46.896120] ? __bfs+0x385/0x7a0 [ 46.899472] ? modules_open+0xa0/0xa0 [ 46.903260] ? lockdep_on+0x50/0x50 [ 46.906869] ? lock_pin_lock+0x350/0x350 [ 46.910916] ? mark_held_locks+0x130/0x130 [ 46.915132] ? kasan_check_read+0x11/0x20 [ 46.919266] ? __lock_acquire+0x2881/0x4ec0 [ 46.923572] ? mark_held_locks+0x130/0x130 [ 46.927786] ? print_usage_bug+0xc0/0xc0 [ 46.931829] ? _raw_spin_unlock+0x2c/0x50 [ 46.935960] ? graph_lock+0x170/0x170 [ 46.939742] ? ext4_exit_mballoc+0xc0/0xc0 [ 46.943959] ? __lock_acquire+0x7ec/0x4ec0 [ 46.948172] ? find_held_lock+0x36/0x1c0 [ 46.952215] ? mark_held_locks+0x130/0x130 [ 46.956428] ? lock_downgrade+0x900/0x900 [ 46.960558] ? ext4_es_scan+0x960/0x960 [ 46.964517] ? lock_release+0x970/0x970 [ 46.968475] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.973128] ? kasan_check_write+0x14/0x20 [ 46.977343] ? lock_acquire+0x1ed/0x520 [ 46.981298] ? integrity_inode_free+0x77/0x320 [ 46.985862] ? ext4_es_remove_extent+0x151/0x500 [ 46.990601] ? lock_release+0x970/0x970 [ 46.994557] ? kasan_check_write+0x14/0x20 [ 46.998775] ? do_raw_write_lock+0xbd/0x1b0 [ 47.003080] integrity_inode_free+0x12f/0x320 [ 47.007560] security_inode_free+0x19/0x90 [ 47.011777] __destroy_inode+0x328/0x820 [ 47.015822] ? generic_update_time+0x450/0x450 [ 47.020385] ? evict+0x5d8/0x980 [ 47.023733] ? lock_downgrade+0x900/0x900 [ 47.027864] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.033050] destroy_inode+0xda/0x200 [ 47.036831] ? __destroy_inode+0x820/0x820 [ 47.041047] ? kasan_check_write+0x14/0x20 [ 47.045274] ? do_raw_spin_lock+0xc1/0x200 [ 47.049508] evict+0x5e0/0x980 [ 47.052694] ? destroy_inode+0x200/0x200 [ 47.056734] ? iput+0x671/0xa90 [ 47.059996] ? lock_downgrade+0x900/0x900 [ 47.064131] ? kasan_check_read+0x11/0x20 [ 47.068277] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.072842] ? lock_downgrade+0x900/0x900 [ 47.076972] iput+0x679/0xa90 [ 47.080058] ? inode_add_lru+0x2a0/0x2a0 [ 47.084100] ? up_write+0x7b/0x220 [ 47.087621] ? up_read+0x110/0x110 [ 47.091140] ? up_read+0x110/0x110 [ 47.094663] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.100200] ? check_preemption_disabled+0x48/0x200 [ 47.105200] ext4_ioctl+0x236f/0x4210 [ 47.108984] ? is_bpf_text_address+0xac/0x170 [ 47.113463] ? ext4_ioctl_group_add+0x560/0x560 [ 47.118113] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.123890] ? kasan_check_read+0x11/0x20 [ 47.128022] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.133282] ? rcu_bh_qs+0xc0/0xc0 [ 47.136804] ? rcu_bh_qs+0xc0/0xc0 [ 47.140329] ? unwind_dump+0x190/0x190 [ 47.144202] ? is_bpf_text_address+0xd3/0x170 [ 47.148679] ? kernel_text_address+0x79/0xf0 [ 47.153070] ? __kernel_text_address+0xd/0x40 [ 47.157545] ? unwind_get_return_address+0x61/0xa0 [ 47.162462] ? __save_stack_trace+0x8d/0xf0 [ 47.166769] ? save_stack+0xa9/0xd0 [ 47.170379] ? save_stack+0x43/0xd0 [ 47.173986] ? __kasan_slab_free+0x102/0x150 [ 47.178373] ? kasan_slab_free+0xe/0x10 [ 47.182330] ? kmem_cache_free+0x83/0x290 [ 47.186666] ? putname+0xf2/0x130 [ 47.190102] ? do_sys_open+0x54d/0x700 [ 47.193969] ? __x64_sys_openat+0x9d/0x100 [ 47.198184] ? do_syscall_64+0x1b9/0x820 [ 47.202227] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.207573] ? trace_hardirqs_off+0xb8/0x310 [ 47.211959] ? kasan_check_read+0x11/0x20 [ 47.216101] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.220511] ? trace_hardirqs_on+0x310/0x310 [ 47.224928] ? kasan_check_write+0x14/0x20 [ 47.229143] ? trace_hardirqs_off+0xb8/0x310 [ 47.233534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.239052] ? check_preemption_disabled+0x48/0x200 [ 47.244052] ? check_preemption_disabled+0x48/0x200 [ 47.249049] ? ext4_ioctl_group_add+0x560/0x560 [ 47.253706] do_vfs_ioctl+0x1de/0x1720 [ 47.257574] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.262848] ? ioctl_preallocate+0x300/0x300 [ 47.267236] ? memset+0x31/0x40 [ 47.270505] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.276046] ? smack_file_ioctl+0x210/0x3c0 [ 47.280367] ? fget_raw+0x20/0x20 [ 47.283801] ? smack_file_lock+0x2e0/0x2e0 [ 47.288022] ? do_syscall_64+0x9a/0x820 [ 47.291979] ? do_syscall_64+0x9a/0x820 [ 47.295935] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.301471] ? security_file_ioctl+0x94/0xc0 [ 47.305875] ksys_ioctl+0xa9/0xd0 [ 47.309324] __x64_sys_ioctl+0x73/0xb0 [ 47.313196] do_syscall_64+0x1b9/0x820 [ 47.317067] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.322412] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.327319] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.332145] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.337153] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.342154] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.347166] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.352006] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.357178] RIP: 0033:0x440029 [ 47.360356] 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 [ 47.379251] RSP: 002b:00007ffd5e0b73b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 47.386946] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 47.394210] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 47.401460] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 47.408707] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018b0 [ 47.415955] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 47.423207] Modules linked in: [ 47.426872] ---[ end trace ac2660053f72f88c ]--- [ 47.431689] RIP: 0010:rb_erase+0x306/0x3710 [ 47.435997] 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 [ 47.454929] RSP: 0018:ffff8801ba816918 EFLAGS: 00010202 [ 47.460505] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.467769] RDX: 1ffff10037502d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 47.475066] RBP: ffff8801ba817320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 47.482364] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c3c07270 [ 47.489659] R13: dffffc0000000000 R14: ffff8801ba8172f8 R15: ffff8801ba817438 [ 47.496940] FS: 0000000001f9d880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 47.505228] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.511158] CR2: 00000000200000c0 CR3: 00000001d7dc7000 CR4: 00000000001406f0 [ 47.518426] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.525717] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.533001] Kernel panic - not syncing: Fatal exception [ 47.539203] Kernel Offset: disabled [ 47.542824] Rebooting in 86400 seconds..