Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 30.599690] audit: type=1800 audit(1539689267.146:33): pid=5331 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 [ 30.621760] audit: type=1800 audit(1539689267.146:34): pid=5331 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: [ 37.985655] audit: type=1400 audit(1539689274.536:35): avc: denied { map } for pid=5507 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 '10.128.0.28' (ECDSA) to the list of known hosts. executing program [ 44.580903] audit: type=1400 audit(1539689281.126:36): avc: denied { map } for pid=5520 comm="syz-executor289" path="/root/syz-executor289618659" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 44.607251] audit: type=1400 audit(1539689281.126:37): avc: denied { map } for pid=5520 comm="syz-executor289" path="/dev/nullb0" dev="devtmpfs" ino=14151 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=blk_file permissive=1 [ 44.607299] ------------[ cut here ]------------ [ 44.637818] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 44.647034] WARNING: CPU: 0 PID: 5520 at block/blk-core.c:2175 generic_make_request_checks+0xef9/0x26c0 [ 44.656567] Kernel panic - not syncing: panic_on_warn set ... [ 44.656567] [ 44.663914] CPU: 0 PID: 5520 Comm: syz-executor289 Not tainted 4.19.0-rc8+ #64 [ 44.671252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.680584] Call Trace: [ 44.683158] dump_stack+0x1c4/0x2b4 [ 44.686776] ? dump_stack_print_info.cold.2+0x52/0x52 [ 44.691955] panic+0x238/0x4e7 [ 44.695131] ? add_taint.cold.5+0x16/0x16 [ 44.699267] ? __warn.cold.8+0x148/0x1ba [ 44.703320] ? __warn.cold.8+0x117/0x1ba [ 44.707387] ? generic_make_request_checks+0xef9/0x26c0 [ 44.712733] __warn.cold.8+0x163/0x1ba [ 44.716604] ? rcu_bh_qs+0xc0/0xc0 [ 44.720128] ? generic_make_request_checks+0xef9/0x26c0 [ 44.725493] report_bug+0x254/0x2d0 [ 44.729110] do_error_trap+0x1fc/0x4d0 [ 44.732981] ? math_error+0x3f0/0x3f0 [ 44.736767] ? vprintk_default+0x28/0x30 [ 44.740813] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.745729] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.750732] ? printk+0xa7/0xcf [ 44.754001] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.758828] do_invalid_op+0x1b/0x20 [ 44.762546] invalid_op+0x14/0x20 [ 44.765986] RIP: 0010:generic_make_request_checks+0xef9/0x26c0 [ 44.771938] Code: 8b ad e4 04 00 00 4c 8d b5 78 ff ff ff 48 89 df 4c 89 f6 e8 29 82 07 00 48 c7 c7 a0 f3 3e 88 48 89 c6 44 89 ea e8 57 61 d5 fd <0f> 0b e9 c1 f4 ff ff e8 1b 92 0b fe e8 d6 32 f5 fd e8 11 92 0b fe [ 44.790838] RSP: 0018:ffff8801c389e430 EFLAGS: 00010282 [ 44.796184] RAX: 0000000000000000 RBX: ffff8801d8bd9980 RCX: 0000000000000000 [ 44.803455] RDX: 0000000000000000 RSI: ffffffff8164d435 RDI: 0000000000000005 [ 44.810716] RBP: ffff8801c389e730 R08: ffff8801c3400600 R09: ffffed003b5c4fe8 [ 44.817968] R10: ffffed003b5c4fe8 R11: ffff8801dae27f47 R12: ffff8801d8bd9988 [ 44.825220] R13: 0000000000000000 R14: ffff8801c389e6a8 R15: ffff8801d14c4080 [ 44.832485] ? vprintk_func+0x85/0x181 [ 44.836360] ? kasan_check_write+0x14/0x20 [ 44.840589] ? blk_queue_bypass_end+0x210/0x210 [ 44.845255] ? blk_queue_enter+0xb4e/0xe80 [ 44.849474] ? depot_save_stack+0x292/0x470 [ 44.853784] ? blk_exit_rl+0x80/0x80 [ 44.857478] ? save_stack+0x43/0xd0 [ 44.861083] ? kasan_kmalloc+0xc7/0xe0 [ 44.864952] ? kasan_slab_alloc+0x12/0x20 [ 44.869082] ? kmem_cache_alloc+0x12e/0x730 [ 44.873392] ? mempool_alloc_slab+0x44/0x60 [ 44.877697] ? mempool_alloc+0x193/0x4a0 [ 44.881741] ? bio_alloc_bioset+0x3a8/0x700 [ 44.886046] ? submit_bh_wbc+0x14b/0x790 [ 44.890091] ? __block_write_full_page+0x931/0x1490 [ 44.895088] ? block_write_full_page+0x221/0x270 [ 44.899825] ? blkdev_writepage+0x24/0x30 [ 44.903954] ? __writepage+0x69/0xe0 [ 44.907653] ? mark_held_locks+0x130/0x130 [ 44.911872] ? task_work_run+0x1e8/0x2a0 [ 44.915916] ? do_exit+0x1ad7/0x2610 [ 44.919814] ? do_group_exit+0x177/0x440 [ 44.923860] ? __x64_sys_exit_group+0x3e/0x50 [ 44.928442] ? do_syscall_64+0x1b9/0x820 [ 44.932488] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.937836] ? graph_lock+0x170/0x170 [ 44.941649] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.947178] ? check_preemption_disabled+0x48/0x200 [ 44.952176] ? check_preemption_disabled+0x48/0x200 [ 44.957200] ? __lock_is_held+0xb5/0x140 [ 44.961247] generic_make_request+0x2bd/0x15a0 [ 44.965815] ? blk_get_request+0x4e0/0x4e0 [ 44.970030] ? graph_lock+0x170/0x170 [ 44.973816] ? graph_lock+0x170/0x170 [ 44.977600] ? mempool_alloc_slab+0x44/0x60 [ 44.981905] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.987434] ? check_preemption_disabled+0x48/0x200 [ 44.992433] ? check_preemption_disabled+0x48/0x200 [ 44.997436] ? find_held_lock+0x36/0x1c0 [ 45.001482] ? guard_bio_eod+0x1f4/0x630 [ 45.005528] ? lock_downgrade+0x900/0x900 [ 45.009656] ? check_preemption_disabled+0x48/0x200 [ 45.014666] submit_bio+0xba/0x460 [ 45.018191] ? submit_bio+0xba/0x460 [ 45.021886] ? rcu_bh_qs+0xc0/0xc0 [ 45.025409] ? generic_make_request+0x15a0/0x15a0 [ 45.030239] ? __bio_add_page+0x134/0x290 [ 45.034375] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 45.039389] ? guard_bio_eod+0x2bb/0x630 [ 45.043440] submit_bh_wbc+0x5de/0x790 [ 45.047312] __block_write_full_page+0x931/0x1490 [ 45.052135] ? check_disk_change+0x140/0x140 [ 45.056548] ? __getblk_gfp+0xd50/0xd50 [ 45.060529] ? submit_bh_wbc+0x790/0x790 [ 45.064576] ? trace_hardirqs_on+0xbd/0x310 [ 45.068879] ? kasan_check_read+0x11/0x20 [ 45.073012] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 45.078451] ? graph_lock+0x170/0x170 [ 45.082236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.087758] ? check_preemption_disabled+0x48/0x200 [ 45.092758] ? check_preemption_disabled+0x48/0x200 [ 45.097765] block_write_full_page+0x221/0x270 [ 45.102329] ? check_disk_change+0x140/0x140 [ 45.106725] blkdev_writepage+0x24/0x30 [ 45.110686] __writepage+0x69/0xe0 [ 45.114210] write_cache_pages+0xd8e/0x1e50 [ 45.118515] ? tag_pages_for_writeback+0x4a0/0x4a0 [ 45.123439] ? clear_page_dirty_for_io+0x18f0/0x18f0 [ 45.128528] ? _raw_spin_unlock_irq+0x60/0x80 [ 45.133009] ? __switch_to_asm+0x34/0x70 [ 45.137052] ? __switch_to_asm+0x34/0x70 [ 45.141092] ? __switch_to_asm+0x40/0x70 [ 45.145134] ? __switch_to_asm+0x34/0x70 [ 45.149189] ? __switch_to_asm+0x40/0x70 [ 45.153230] ? __switch_to_asm+0x34/0x70 [ 45.157273] ? __switch_to_asm+0x34/0x70 [ 45.161317] ? __switch_to_asm+0x34/0x70 [ 45.165358] ? __switch_to_asm+0x40/0x70 [ 45.169414] ? mark_held_locks+0x130/0x130 [ 45.173638] ? find_held_lock+0x36/0x1c0 [ 45.177690] ? lock_acquire+0x1ed/0x520 [ 45.181644] ? __blkdev_put+0xc2/0x830 [ 45.185543] ? lock_release+0x970/0x970 [ 45.189530] ? arch_local_save_flags+0x40/0x40 [ 45.194110] ? find_held_lock+0x36/0x1c0 [ 45.198152] ? graph_lock+0x170/0x170 [ 45.201941] ? __mutex_lock+0x85e/0x1700 [ 45.205991] ? blk_start_plug+0xcc/0x370 [ 45.210035] ? blk_lld_busy+0x70/0x70 [ 45.213852] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 45.219112] ? lock_downgrade+0x900/0x900 [ 45.223243] ? kasan_check_read+0x11/0x20 [ 45.227384] generic_writepages+0xda/0x150 [ 45.231603] ? write_cache_pages+0x1e50/0x1e50 [ 45.236176] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.241700] blkdev_writepages+0x1d/0x30 [ 45.245744] ? blkdev_readpages+0x40/0x40 [ 45.249877] do_writepages+0x9a/0x1a0 [ 45.253673] __filemap_fdatawrite_range+0x364/0x4a0 [ 45.258678] ? delete_from_page_cache_batch+0x11f0/0x11f0 [ 45.264209] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 45.269122] ? blkdev_put+0x540/0x540 [ 45.272905] filemap_write_and_wait+0x44/0xc0 [ 45.277407] __blkdev_put+0x202/0x830 [ 45.281194] ? bd_set_size+0x370/0x370 [ 45.285077] ? ima_file_free+0x132/0x650 [ 45.289127] ? blkdev_put+0x540/0x540 [ 45.292910] blkdev_put+0x98/0x540 [ 45.296465] ? blkdev_put+0x540/0x540 [ 45.300250] blkdev_close+0x8b/0xb0 [ 45.303862] __fput+0x385/0xa30 [ 45.307124] ? get_max_files+0x20/0x20 [ 45.310994] ? trace_hardirqs_on+0xbd/0x310 [ 45.315297] ? kasan_check_read+0x11/0x20 [ 45.319429] ? task_work_run+0x1af/0x2a0 [ 45.323481] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 45.328920] ? kasan_check_write+0x14/0x20 [ 45.333143] ? do_raw_spin_lock+0xc1/0x200 [ 45.337365] ____fput+0x15/0x20 [ 45.340636] task_work_run+0x1e8/0x2a0 [ 45.344511] ? task_work_cancel+0x240/0x240 [ 45.348821] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.354342] ? switch_task_namespaces+0x9d/0xd0 [ 45.358999] do_exit+0x1ad7/0x2610 [ 45.362527] ? mm_update_next_owner+0x990/0x990 [ 45.367185] ? __might_fault+0x12b/0x1e0 [ 45.371235] ? lock_downgrade+0x900/0x900 [ 45.375393] ? lock_release+0x970/0x970 [ 45.379352] ? arch_local_save_flags+0x40/0x40 [ 45.383921] ? selinux_capable+0x36/0x40 [ 45.387989] ? set_device_ro+0x12/0x80 [ 45.391861] ? blkdev_ioctl+0x15d/0x2010 [ 45.395905] ? blkpg_ioctl+0xc10/0xc10 [ 45.399773] ? avc_ss_reset+0x190/0x190 [ 45.403733] ? graph_lock+0x170/0x170 [ 45.407516] ? print_usage_bug+0xc0/0xc0 [ 45.411558] ? lock_downgrade+0x900/0x900 [ 45.415689] ? graph_lock+0x170/0x170 [ 45.419474] ? graph_lock+0x170/0x170 [ 45.423267] ? ___might_sleep+0x1ed/0x300 [ 45.427436] ? arch_local_save_flags+0x40/0x40 [ 45.432018] ? find_held_lock+0x36/0x1c0 [ 45.436066] ? block_ioctl+0xee/0x130 [ 45.439866] ? blkdev_fallocate+0x400/0x400 [ 45.444175] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.449704] ? do_vfs_ioctl+0x201/0x1720 [ 45.453755] ? ioctl_preallocate+0x300/0x300 [ 45.458150] ? selinux_file_mprotect+0x620/0x620 [ 45.462899] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.468426] ? __do_page_fault+0x4a6/0xed0 [ 45.472649] do_group_exit+0x177/0x440 [ 45.476523] ? trace_hardirqs_on+0xbd/0x310 [ 45.480825] ? __ia32_sys_exit+0x50/0x50 [ 45.484868] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 45.490299] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.495822] ? ksys_ioctl+0x81/0xd0 [ 45.499448] __x64_sys_exit_group+0x3e/0x50 [ 45.503755] do_syscall_64+0x1b9/0x820 [ 45.507643] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.512998] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.517926] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.522752] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.527753] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.532755] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.537761] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.542593] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.547766] RIP: 0033:0x43eca8 [ 45.550950] Code: Bad RIP value. [ 45.554296] RSP: 002b:00007ffdc260ad68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.561987] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eca8 [ 45.569237] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.576490] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.583744] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 45.590994] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 45.599305] Kernel Offset: disabled [ 45.602993] Rebooting in 86400 seconds..