Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 29.417759] audit: type=1800 audit(1538394711.530:33): pid=5322 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 [ 29.440466] audit: type=1800 audit(1538394711.530:34): pid=5322 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.766749] audit: type=1400 audit(1538394714.880:35): avc: denied { map } for pid=5497 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 '10.128.0.92' (ECDSA) to the list of known hosts. executing program [ 39.443571] audit: type=1400 audit(1538394721.550:36): avc: denied { map } for pid=5511 comm="syz-executor842" path="/root/syz-executor842684429" 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 [ 39.448963] kasan: CONFIG_KASAN_INLINE enabled [ 39.474605] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.482012] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.488237] CPU: 0 PID: 5511 Comm: syz-executor842 Not tainted 4.19.0-rc6+ #41 [ 39.495580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.504930] RIP: 0010:rb_erase+0x306/0x3710 [ 39.509244] 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 [ 39.528125] RSP: 0018:ffff8801b7026918 EFLAGS: 00010202 [ 39.533470] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.540723] RDX: 1ffff10036e04d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 39.547975] RBP: ffff8801b7027320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 39.555226] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b0b783b0 [ 39.562475] R13: dffffc0000000000 R14: ffff8801b70272f8 R15: ffff8801b7027438 [ 39.569731] FS: 0000000002259880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 39.578038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.583915] CR2: 0000000020000080 CR3: 00000001d7b23000 CR4: 00000000001406f0 [ 39.591165] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.598434] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.605684] Call Trace: [ 39.608255] ? lockdep_on+0x50/0x50 [ 39.611866] ? rb_insert_color+0x1460/0x1460 [ 39.616257] ? noop_count+0x40/0x40 [ 39.619867] ? lock_pin_lock+0x350/0x350 [ 39.623906] ? noop_count+0x40/0x40 [ 39.627516] ? kasan_check_read+0x11/0x20 [ 39.631651] ? noop_count+0x40/0x40 [ 39.635260] ? noop_count+0x40/0x40 [ 39.638869] ? lock_pin_lock+0x350/0x350 [ 39.642910] ? mark_held_locks+0x130/0x130 [ 39.647127] ? check_usage_forwards+0x3e0/0x3e0 [ 39.651775] ? __bfs+0x385/0x7a0 [ 39.655121] ? noop_count+0x40/0x40 [ 39.658734] ? check_usage+0x1a9/0x790 [ 39.662637] ? lock_pin_lock+0x350/0x350 [ 39.666685] ? check_usage_forwards+0x3e0/0x3e0 [ 39.671337] ? __bfs+0x385/0x7a0 [ 39.674686] ? __lock_acquire+0x7ec/0x4ec0 [ 39.678900] ? lockdep_on+0x50/0x50 [ 39.682506] ? lock_pin_lock+0x350/0x350 [ 39.686560] ? mark_held_locks+0x130/0x130 [ 39.691050] ? kasan_check_read+0x11/0x20 [ 39.695179] ? __lock_acquire+0x2881/0x4ec0 [ 39.699486] ? mark_held_locks+0x130/0x130 [ 39.703702] ? print_usage_bug+0xc0/0xc0 [ 39.707752] ? _raw_spin_unlock+0x2c/0x50 [ 39.711901] ? graph_lock+0x170/0x170 [ 39.715709] ? ext4_exit_mballoc+0xc0/0xc0 [ 39.719928] ? __lock_acquire+0x7ec/0x4ec0 [ 39.724146] ? find_held_lock+0x36/0x1c0 [ 39.728192] ? mark_held_locks+0x130/0x130 [ 39.732404] ? lock_downgrade+0x900/0x900 [ 39.736533] ? ext4_es_scan+0x960/0x960 [ 39.740499] ? do_raw_write_trylock+0x1c0/0x1c0 [ 39.745151] ? kasan_check_write+0x14/0x20 [ 39.749366] ? lock_acquire+0x1ed/0x520 [ 39.753321] ? integrity_inode_free+0x77/0x320 [ 39.757886] ? ext4_es_remove_extent+0x151/0x500 [ 39.762626] ? lock_release+0x970/0x970 [ 39.766587] ? kasan_check_write+0x14/0x20 [ 39.770802] ? do_raw_write_lock+0xbd/0x1b0 [ 39.775108] integrity_inode_free+0x12f/0x320 [ 39.779591] security_inode_free+0x19/0x90 [ 39.783805] __destroy_inode+0x328/0x820 [ 39.787848] ? generic_update_time+0x450/0x450 [ 39.792413] ? evict+0x5d8/0x980 [ 39.795759] ? lock_downgrade+0x900/0x900 [ 39.799903] ? __inode_wait_for_writeback+0x2cf/0x380 [ 39.805081] destroy_inode+0xda/0x200 [ 39.808862] ? __destroy_inode+0x820/0x820 [ 39.813092] ? kasan_check_write+0x14/0x20 [ 39.817313] ? do_raw_spin_lock+0xc1/0x200 [ 39.821528] evict+0x5e0/0x980 [ 39.824708] ? destroy_inode+0x200/0x200 [ 39.828761] ? iput+0x671/0xa90 [ 39.832035] ? lock_downgrade+0x900/0x900 [ 39.836179] ? kasan_check_read+0x11/0x20 [ 39.840307] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.844877] ? lock_downgrade+0x900/0x900 [ 39.849011] iput+0x679/0xa90 [ 39.852103] ? inode_add_lru+0x2a0/0x2a0 [ 39.856146] ? up_write+0x7b/0x220 [ 39.859668] ? up_read+0x110/0x110 [ 39.863183] ? up_read+0x110/0x110 [ 39.866705] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.872223] ? check_preemption_disabled+0x48/0x200 [ 39.877227] ext4_ioctl+0x236f/0x4210 [ 39.881011] ? ext4_ioctl_group_add+0x560/0x560 [ 39.885665] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 39.891440] ? kasan_check_read+0x11/0x20 [ 39.895584] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.900842] ? rcu_bh_qs+0xc0/0xc0 [ 39.904363] ? unwind_dump+0x190/0x190 [ 39.908236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.913753] ? avc_has_extended_perms+0xab2/0x15a0 [ 39.918672] ? fpu__prepare_read+0x287/0x750 [ 39.923090] ? avc_ss_reset+0x190/0x190 [ 39.927048] ? save_stack+0xa9/0xd0 [ 39.930653] ? save_stack+0x43/0xd0 [ 39.934255] ? __kasan_slab_free+0x102/0x150 [ 39.938641] ? kasan_slab_free+0xe/0x10 [ 39.942600] ? kmem_cache_free+0x83/0x290 [ 39.946728] ? putname+0xf2/0x130 [ 39.950161] ? do_sys_open+0x54d/0x700 [ 39.954026] ? __x64_sys_openat+0x9d/0x100 [ 39.958241] ? do_syscall_64+0x1b9/0x820 [ 39.962284] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.967648] ? ___might_sleep+0x1ed/0x300 [ 39.971865] ? arch_local_save_flags+0x40/0x40 [ 39.976427] ? kasan_check_write+0x14/0x20 [ 39.980643] ? trace_hardirqs_off+0xb8/0x310 [ 39.985051] ? ext4_ioctl_group_add+0x560/0x560 [ 39.989706] do_vfs_ioctl+0x1de/0x1720 [ 39.993578] ? ioctl_preallocate+0x300/0x300 [ 39.997969] ? selinux_file_mprotect+0x620/0x620 [ 40.002703] ? path_openat+0x2f41/0x5160 [ 40.006761] ? rcu_read_lock_sched_held+0x108/0x120 [ 40.011760] ? kmem_cache_free+0x24f/0x290 [ 40.015977] ? putname+0xf7/0x130 [ 40.019413] ? do_syscall_64+0x9a/0x820 [ 40.023368] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.028887] ? security_file_ioctl+0x94/0xc0 [ 40.033276] ksys_ioctl+0xa9/0xd0 [ 40.036711] __x64_sys_ioctl+0x73/0xb0 [ 40.040588] do_syscall_64+0x1b9/0x820 [ 40.044457] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.049816] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.054726] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.059556] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.064560] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.069588] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.074594] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.079422] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.084592] RIP: 0033:0x440089 [ 40.087769] 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 [ 40.106651] RSP: 002b:00007ffe0a52dc28 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 40.114343] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 40.121595] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 40.128846] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 40.136097] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 40.143359] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 40.150613] Modules linked in: [ 40.154239] ---[ end trace 0720f5b26908d403 ]--- [ 40.159030] RIP: 0010:rb_erase+0x306/0x3710 [ 40.163334] 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 [ 40.182267] RSP: 0018:ffff8801b7026918 EFLAGS: 00010202 [ 40.187660] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.194953] RDX: 1ffff10036e04d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 40.202207] RBP: ffff8801b7027320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 40.209489] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b0b783b0 [ 40.216773] R13: dffffc0000000000 R14: ffff8801b70272f8 R15: ffff8801b7027438 [ 40.224026] FS: 0000000002259880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 40.232261] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.238154] CR2: 0000000020000080 CR3: 00000001d7b23000 CR4: 00000000001406f0 [ 40.245534] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.252810] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.260107] Kernel panic - not syncing: Fatal exception [ 40.266358] Kernel Offset: disabled [ 40.269998] Rebooting in 86400 seconds..