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. [ 30.587197] audit: type=1800 audit(1540222806.473:33): pid=5343 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 [ 30.610222] audit: type=1800 audit(1540222806.473:34): pid=5343 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: [ 35.249114] audit: type=1400 audit(1540222811.133:35): avc: denied { map } for pid=5523 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program [ 48.977418] audit: type=1400 audit(1540222824.863:36): avc: denied { map } for pid=5537 comm="syz-executor261" path="/root/syz-executor261762477" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 48.982553] kasan: CONFIG_KASAN_INLINE enabled [ 49.008542] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.015894] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.022129] CPU: 1 PID: 5537 Comm: syz-executor261 Not tainted 4.19.0+ #76 [ 49.029215] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.038567] RIP: 0010:rb_erase+0x306/0x3710 [ 49.042871] 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 [ 49.061757] RSP: 0018:ffff8801bd796918 EFLAGS: 00010202 [ 49.067179] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.074441] RDX: 1ffff10037af2d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 49.081698] RBP: ffff8801bd797320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 49.088956] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b17213b0 [ 49.096219] R13: dffffc0000000000 R14: ffff8801bd7972f8 R15: ffff8801bd797438 [ 49.103474] FS: 0000000001bba880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.111749] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.117681] CR2: 0000000020000080 CR3: 00000001cc7a3000 CR4: 00000000001406e0 [ 49.124981] Call Trace: [ 49.127565] ? lockdep_on+0x50/0x50 [ 49.131178] ? rb_insert_color+0x1460/0x1460 [ 49.135571] ? noop_count+0x40/0x40 [ 49.139183] ? lock_pin_lock+0x350/0x350 [ 49.143233] ? mark_held_locks+0x130/0x130 [ 49.147458] ? kasan_check_read+0x11/0x20 [ 49.151600] ? noop_count+0x40/0x40 [ 49.155207] ? lock_pin_lock+0x350/0x350 [ 49.159255] ? mark_held_locks+0x130/0x130 [ 49.163476] ? check_usage_forwards+0x3e0/0x3e0 [ 49.168143] ? __bfs+0x385/0x7a0 [ 49.171507] ? noop_count+0x40/0x40 [ 49.175112] ? check_usage+0x1a9/0x790 [ 49.178990] ? lock_pin_lock+0x350/0x350 [ 49.183046] ? check_usage_forwards+0x3e0/0x3e0 [ 49.187706] ? __bfs+0x385/0x7a0 [ 49.191067] ? modules_open+0xa0/0xa0 [ 49.194866] ? lockdep_on+0x50/0x50 [ 49.198495] ? lock_pin_lock+0x350/0x350 [ 49.202548] ? mark_held_locks+0x130/0x130 [ 49.206781] ? kasan_check_read+0x11/0x20 [ 49.210976] ? __lock_acquire+0x2881/0x4ec0 [ 49.215310] ? mark_held_locks+0x130/0x130 [ 49.219596] ? print_usage_bug+0xc0/0xc0 [ 49.223662] ? _raw_spin_unlock+0x2c/0x50 [ 49.227801] ? graph_lock+0x170/0x170 [ 49.231651] ? ext4_exit_mballoc+0xc0/0xc0 [ 49.235920] ? __lock_acquire+0x7ec/0x4ec0 [ 49.240157] ? find_held_lock+0x36/0x1c0 [ 49.244205] ? mark_held_locks+0x130/0x130 [ 49.248484] ? lock_downgrade+0x900/0x900 [ 49.252627] ? ext4_es_scan+0x960/0x960 [ 49.256604] ? do_raw_write_trylock+0x1c0/0x1c0 [ 49.261335] ? kasan_check_write+0x14/0x20 [ 49.265619] ? lock_acquire+0x1ed/0x520 [ 49.269602] ? integrity_inode_free+0x77/0x320 [ 49.274190] ? ext4_es_remove_extent+0x151/0x500 [ 49.278934] ? lock_release+0x970/0x970 [ 49.282897] ? kasan_check_write+0x14/0x20 [ 49.287125] ? do_raw_write_lock+0xbd/0x1e0 [ 49.291450] integrity_inode_free+0x12f/0x320 [ 49.295943] security_inode_free+0x19/0x90 [ 49.300185] __destroy_inode+0x328/0x820 [ 49.304253] ? generic_update_time+0x450/0x450 [ 49.308838] ? evict+0x5d8/0x980 [ 49.312187] ? lock_downgrade+0x900/0x900 [ 49.316344] ? __inode_wait_for_writeback+0x2cf/0x380 [ 49.321525] destroy_inode+0xda/0x200 [ 49.325308] ? __destroy_inode+0x820/0x820 [ 49.329539] ? kasan_check_write+0x14/0x20 [ 49.333762] ? do_raw_spin_lock+0xc1/0x230 [ 49.337980] evict+0x5e0/0x980 [ 49.341161] ? destroy_inode+0x200/0x200 [ 49.345306] ? iput+0x671/0xa90 [ 49.348599] ? lock_downgrade+0x900/0x900 [ 49.352754] ? kasan_check_read+0x11/0x20 [ 49.356889] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.361457] ? lock_downgrade+0x900/0x900 [ 49.365591] iput+0x679/0xa90 [ 49.368686] ? inode_add_lru+0x2a0/0x2a0 [ 49.372734] ? up_write+0x7b/0x220 [ 49.376257] ? up_read+0x110/0x110 [ 49.379781] ? up_read+0x110/0x110 [ 49.383309] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.388870] ? check_preemption_disabled+0x48/0x280 [ 49.393876] ext4_ioctl+0x236f/0x4210 [ 49.397698] ? ext4_ioctl_group_add+0x560/0x560 [ 49.402370] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.408170] ? kasan_check_read+0x11/0x20 [ 49.412434] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 49.417699] ? rcu_bh_qs+0xc0/0xc0 [ 49.421236] ? unwind_dump+0x190/0x190 [ 49.425110] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.430635] ? avc_has_extended_perms+0xab2/0x15a0 [ 49.435559] ? convert_from_fxsr+0x157/0x7d0 [ 49.439951] ? avc_ss_reset+0x190/0x190 [ 49.443911] ? save_stack+0xa9/0xd0 [ 49.447519] ? save_stack+0x43/0xd0 [ 49.451182] ? __kasan_slab_free+0x102/0x150 [ 49.455581] ? kasan_slab_free+0xe/0x10 [ 49.459540] ? kmem_cache_free+0x83/0x290 [ 49.463672] ? putname+0xf2/0x130 [ 49.467127] ? do_sys_open+0x54d/0x700 [ 49.470997] ? __x64_sys_openat+0x9d/0x100 [ 49.475223] ? do_syscall_64+0x1b9/0x820 [ 49.479271] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.484628] ? ___might_sleep+0x1ed/0x300 [ 49.488764] ? arch_local_save_flags+0x40/0x40 [ 49.493337] ? kasan_check_write+0x14/0x20 [ 49.497581] ? trace_hardirqs_off+0xb8/0x310 [ 49.501974] ? ext4_ioctl_group_add+0x560/0x560 [ 49.506641] do_vfs_ioctl+0x1de/0x1720 [ 49.510512] ? ioctl_preallocate+0x300/0x300 [ 49.514910] ? selinux_file_mprotect+0x620/0x620 [ 49.519652] ? path_openat+0x3a31/0x5160 [ 49.523705] ? rcu_read_lock_sched_held+0x108/0x120 [ 49.528732] ? kmem_cache_free+0x24f/0x290 [ 49.532952] ? putname+0xf7/0x130 [ 49.536393] ? do_syscall_64+0x9a/0x820 [ 49.540398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.545925] ? security_file_ioctl+0x94/0xc0 [ 49.550330] ksys_ioctl+0xa9/0xd0 [ 49.553771] __x64_sys_ioctl+0x73/0xb0 [ 49.557645] do_syscall_64+0x1b9/0x820 [ 49.561526] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.566882] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.571812] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.576648] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.581654] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.586661] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.591668] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.596504] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.601681] RIP: 0033:0x440009 [ 49.604866] 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 [ 49.623755] RSP: 002b:00007ffe28546908 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.631452] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.638713] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.645972] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.653239] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.660493] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.667752] Modules linked in: [ 49.670996] ---[ end trace adac5969a8cd068f ]--- [ 49.675763] RIP: 0010:rb_erase+0x306/0x3710 [ 49.680113] 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 [ 49.699062] RSP: 0018:ffff8801bd796918 EFLAGS: 00010202 [ 49.704434] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.711725] RDX: 1ffff10037af2d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 49.719014] RBP: ffff8801bd797320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 49.726451] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b17213b0 [ 49.733723] R13: dffffc0000000000 R14: ffff8801bd7972f8 R15: ffff8801bd797438 [ 49.741019] FS: 0000000001bba880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.749371] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.755242] CR2: 0000000020000080 CR3: 00000001cc7a3000 CR4: 00000000001406e0 [ 49.762558] Kernel panic - not syncing: Fatal exception [ 49.768761] Kernel Offset: disabled [ 49.772382] Rebooting in 86400 seconds..