[ 87.149755][ T28] audit: type=1400 audit(1575799929.573:37): avc: denied { watch } for pid=10179 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 87.184424][ T28] audit: type=1400 audit(1575799929.603:38): avc: denied { watch } for pid=10179 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2232 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.484340][ T28] audit: type=1800 audit(1575799929.903:39): pid=10091 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 [ 87.507246][ T28] audit: type=1800 audit(1575799929.903:40): pid=10091 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: [ 91.104429][ T28] audit: type=1400 audit(1575799933.523:41): avc: denied { map } for pid=10269 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 '10.128.10.40' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 118.701476][ T28] audit: type=1400 audit(1575799961.123:42): avc: denied { map } for pid=10281 comm="syz-executor180" path="/root/syz-executor180524391" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program [ 118.903717][T10288] ------------[ cut here ]------------ [ 118.928736][T10288] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) executing program executing program [ 118.977298][T10288] WARNING: CPU: 0 PID: 10288 at block/blk-core.c:800 generic_make_request_checks+0x1c78/0x2190 [ 118.990031][T10288] Kernel panic - not syncing: panic_on_warn set ... [ 118.996736][T10288] CPU: 0 PID: 10288 Comm: syz-executor180 Not tainted 5.4.0-syzkaller #0 [ 119.005190][T10288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.009876][ T4087] kobject: 'nullb0' (000000003254531c): kobject_uevent_env [ 119.015888][T10288] Call Trace: [ 119.015918][T10288] dump_stack+0x197/0x210 [ 119.015936][T10288] ? generic_make_request_checks+0x1bb0/0x2190 [ 119.015950][T10288] panic+0x2e3/0x75c [ 119.015961][T10288] ? add_taint.cold+0x16/0x16 [ 119.015984][T10288] ? __kasan_check_write+0x14/0x20 [ 119.015997][T10288] ? __warn.cold+0x14/0x3e [ 119.029648][ T4087] kobject: 'nullb0' (000000003254531c): fill_kobj_path: path = '/devices/virtual/block/nullb0' [ 119.031759][T10288] ? __warn+0xd9/0x1cf [ 119.077554][T10288] ? generic_make_request_checks+0x1c78/0x2190 [ 119.084591][T10288] __warn.cold+0x2f/0x3e [ 119.089387][T10288] ? generic_make_request_checks+0x1c78/0x2190 [ 119.098988][T10288] report_bug+0x289/0x300 [ 119.103535][T10288] do_error_trap+0x11b/0x200 [ 119.108280][T10288] do_invalid_op+0x37/0x50 [ 119.112936][T10288] ? generic_make_request_checks+0x1c78/0x2190 [ 119.121142][T10288] invalid_op+0x23/0x30 [ 119.126562][T10288] RIP: 0010:generic_make_request_checks+0x1c78/0x2190 [ 119.134743][T10288] Code: 00 00 44 8b ab 5c 05 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 ca 92 05 00 48 c7 c7 00 fd 6d 88 48 89 c6 44 89 ea e8 97 d7 cb fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 119.158297][T10288] RSP: 0018:ffffc90001dc7380 EFLAGS: 00010286 [ 119.164792][T10288] RAX: 0000000000000000 RBX: ffff8880a1727000 RCX: 0000000000000000 [ 119.174015][T10288] RDX: 0000000000000000 RSI: ffffffff815e88f6 RDI: fffff520003b8e62 [ 119.182426][T10288] RBP: ffffc90001dc7480 R08: ffff88809481e3c0 R09: ffffed1015d06621 [ 119.190866][T10288] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: ffff8880a8c89a08 [ 119.198952][T10288] R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a8c89a00 [ 119.206951][T10288] ? vprintk_func+0x86/0x189 [ 119.211634][T10288] ? __bio_clone_fast+0x43f/0x5a0 [ 119.217243][T10288] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 119.224213][T10288] ? ktime_get+0x100/0x2f0 [ 119.228814][T10288] ? __bio_clone_fast+0x43f/0x5a0 [ 119.233991][T10288] ? ktime_get+0x100/0x2f0 [ 119.238555][T10288] ? lockdep_hardirqs_on+0x421/0x5e0 [ 119.244500][T10288] ? trace_hardirqs_on+0x67/0x240 [ 119.249874][T10288] generic_make_request+0x8f/0xb00 [ 119.255034][T10288] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 119.261400][T10288] ? debug_smp_processor_id+0x33/0x18a [ 119.267505][T10288] ? blk_queue_enter+0xdd0/0xdd0 [ 119.272730][T10288] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 119.278640][T10288] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 119.284947][T10288] __blk_queue_split+0x908/0x17a0 [ 119.289984][T10288] ? __blk_queue_split+0x908/0x17a0 [ 119.295564][T10288] ? blk_rq_map_sg+0x1ab0/0x1ab0 [ 119.300528][T10288] ? lock_downgrade+0x920/0x920 [ 119.305525][T10288] blk_mq_make_request+0x17d/0x2280 [ 119.310851][T10288] ? blk_queue_enter+0xb35/0xdd0 [ 119.315820][T10288] ? blk_mq_try_issue_directly+0x1c0/0x1c0 [ 119.322135][T10288] ? __kasan_check_read+0x11/0x20 [ 119.327545][T10288] generic_make_request+0x23c/0xb00 [ 119.332765][T10288] ? blk_queue_enter+0xdd0/0xdd0 [ 119.337818][T10288] ? lock_downgrade+0x920/0x920 [ 119.342686][T10288] submit_bio+0x113/0x600 [ 119.347024][T10288] ? submit_bio+0x113/0x600 [ 119.351853][T10288] ? generic_make_request+0xb00/0xb00 [ 119.357977][T10288] ? bvec_alloc+0x2f0/0x2f0 [ 119.362558][T10288] ? bio_add_page+0x1ac/0x220 [ 119.367363][T10288] blk_next_bio+0x4a/0x60 [ 119.371699][T10288] __blkdev_issue_zero_pages+0x151/0x430 [ 119.380682][T10288] blkdev_issue_zeroout+0x434/0x4c0 [ 119.386932][T10288] ? __blkdev_issue_zeroout+0x1a0/0x1a0 [ 119.392532][T10288] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 119.398872][T10288] blkdev_ioctl+0x146f/0x1df0 [ 119.403993][T10288] ? blkpg_ioctl+0xa90/0xa90 [ 119.408660][T10288] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 119.414627][T10288] ? ___might_sleep+0x163/0x2c0 [ 119.419569][T10288] block_ioctl+0xee/0x130 [ 119.423884][T10288] ? blkdev_fallocate+0x410/0x410 [ 119.428896][T10288] do_vfs_ioctl+0x977/0x14e0 [ 119.433526][T10288] ? compat_ioctl_preallocate+0x220/0x220 [ 119.439288][T10288] ? selinux_file_mprotect+0x620/0x620 [ 119.444746][T10288] ? __kasan_check_write+0x14/0x20 [ 119.449958][T10288] ? tomoyo_file_ioctl+0x23/0x30 [ 119.454886][T10288] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 119.461378][T10288] ? security_file_ioctl+0x8d/0xc0 [ 119.466531][T10288] ksys_ioctl+0xab/0xd0 [ 119.470712][T10288] __x64_sys_ioctl+0x73/0xb0 [ 119.475333][T10288] do_syscall_64+0xfa/0x790 [ 119.479983][T10288] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 119.486113][T10288] RIP: 0033:0x4412a9 [ 119.490013][T10288] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 119.509998][T10288] RSP: 002b:00007ffe15e0ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 119.518786][T10288] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412a9 [ 119.526881][T10288] RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003 [ 119.535062][T10288] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 119.543591][T10288] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402020 [ 119.551559][T10288] R13: 00000000004020b0 R14: 0000000000000000 R15: 0000000000000000 [ 119.562016][T10288] Kernel Offset: disabled [ 119.566813][T10288] Rebooting in 86400 seconds..