[ 37.283730] audit: type=1800 audit(1574960342.541:32): pid=7422 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 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. [ 38.146827] audit: type=1800 audit(1574960343.481:33): pid=7422 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=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. syzkaller login: [ 45.836455] kauditd_printk_skb: 2 callbacks suppressed [ 45.836469] audit: type=1400 audit(1574960351.171:36): avc: denied { map } for pid=7607 comm="syz-executor401" path="/root/syz-executor401583640" 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 [ 45.850630] IPVS: ftp: loaded support on port[0] = 21 executing program [ 45.897079] audit: type=1400 audit(1574960351.231:37): avc: denied { create } for pid=7608 comm="syz-executor401" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 45.922274] audit: type=1400 audit(1574960351.231:38): avc: denied { write } for pid=7608 comm="syz-executor401" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 45.946761] audit: type=1400 audit(1574960351.231:39): avc: denied { read } for pid=7608 comm="syz-executor401" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 45.975176] audit: type=1804 audit(1574960351.311:40): pid=7608 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor401" name="/root/file0" dev="sda1" ino=16485 res=1 [ 46.063609] ------------[ cut here ]------------ [ 46.068568] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 46.077624] WARNING: CPU: 1 PID: 7608 at block/blk-core.c:2177 generic_make_request_checks+0x1fc5/0x24c0 [ 46.088056] Kernel panic - not syncing: panic_on_warn set ... [ 46.088056] [ 46.104625] CPU: 1 PID: 7608 Comm: syz-executor401 Not tainted 4.19.86-syzkaller #0 [ 46.112479] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.122002] Call Trace: [ 46.124589] dump_stack+0x197/0x210 [ 46.128213] panic+0x26a/0x50e [ 46.131399] ? __warn_printk+0xf3/0xf3 [ 46.135313] ? generic_make_request_checks+0x1fc5/0x24c0 [ 46.140845] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.146377] ? __warn.cold+0x5/0x53 [ 46.149999] ? __warn+0xe8/0x1d0 [ 46.153368] ? generic_make_request_checks+0x1fc5/0x24c0 [ 46.158813] __warn.cold+0x20/0x53 [ 46.162350] ? console_unlock+0xf36/0x10d0 [ 46.166668] ? generic_make_request_checks+0x1fc5/0x24c0 [ 46.172112] report_bug+0x263/0x2b0 [ 46.175800] do_error_trap+0x204/0x360 [ 46.179687] ? math_error+0x340/0x340 [ 46.183489] ? wake_up_klogd+0x99/0xd0 [ 46.187774] ? vprintk_emit+0x1ab/0x690 [ 46.193453] ? error_entry+0x7c/0xe0 [ 46.197347] ? trace_hardirqs_off_caller+0x65/0x220 [ 46.202547] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.207624] do_invalid_op+0x1b/0x20 [ 46.211347] invalid_op+0x14/0x20 [ 46.214903] RIP: 0010:generic_make_request_checks+0x1fc5/0x24c0 [ 46.220959] Code: 85 1f 04 00 00 45 8b b6 e4 04 00 00 48 8d 73 a0 4c 89 e7 e8 0d 63 06 00 48 c7 c7 60 9f 80 87 48 89 c6 44 89 f2 e8 e9 92 2f fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 46.240455] RSP: 0018:ffff88809d5871e8 EFLAGS: 00010282 [ 46.245947] RAX: 0000000000000000 RBX: ffff88809d5872b8 RCX: 0000000000000000 [ 46.253303] RDX: 0000000000000000 RSI: ffffffff815595f6 RDI: ffffed1013ab0e2f [ 46.260567] RBP: ffff88809d5872e0 R08: ffff8880993b2000 R09: ffff8880993b28a0 [ 46.267830] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fa3ce00 [ 46.275272] R13: ffff88809fa3ce08 R14: 0000000000000000 R15: 0000000000000000 [ 46.282606] ? vprintk_func+0x86/0x189 [ 46.286584] ? generic_make_request_checks+0x1fc5/0x24c0 [ 46.293239] ? trace_event_raw_event_block_rq_requeue+0x600/0x600 [ 46.299835] generic_make_request+0x24c/0x12d0 [ 46.304430] ? blk_get_request+0x710/0x710 [ 46.308664] ? guard_bio_eod+0x1da/0x660 [ 46.312734] ? find_held_lock+0x35/0x130 [ 46.316793] ? guard_bio_eod+0x1da/0x660 [ 46.320856] submit_bio+0xba/0x480 [ 46.324396] ? submit_bio+0xba/0x480 [ 46.328195] ? lock_downgrade+0x880/0x880 [ 46.332343] ? generic_make_request+0x12d0/0x12d0 [ 46.337312] ? kasan_check_read+0x11/0x20 [ 46.341463] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 46.346480] ? guard_bio_eod+0x2a1/0x660 [ 46.350543] submit_bh_wbc+0x5dc/0x790 [ 46.354435] __block_write_full_page+0x76e/0x1010 [ 46.359280] ? check_disk_change+0x140/0x140 [ 46.363698] block_write_full_page+0x21f/0x270 [ 46.368283] ? check_disk_change+0x140/0x140 [ 46.372694] blkdev_writepage+0x25/0x30 [ 46.376668] __writepage+0x62/0xe0 [ 46.380298] write_cache_pages+0x971/0x1670 [ 46.384629] ? tag_pages_for_writeback+0x320/0x320 [ 46.390071] ? clear_page_dirty_for_io+0xff0/0xff0 [ 46.395016] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 46.400301] ? __lock_acquire+0x6ee/0x49c0 [ 46.404549] generic_writepages+0xe6/0x160 [ 46.408789] ? write_cache_pages+0x1670/0x1670 [ 46.413711] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 46.418830] ? wbc_attach_and_unlock_inode+0x51a/0xa00 [ 46.424204] ? find_held_lock+0x35/0x130 [ 46.428269] ? blkdev_readpages+0x40/0x40 [ 46.432433] blkdev_writepages+0x1e/0x30 [ 46.436506] do_writepages+0xf3/0x2a0 [ 46.440305] ? page_writeback_cpu_online+0x20/0x20 [ 46.445239] ? do_raw_spin_unlock+0x178/0x270 [ 46.449732] ? _raw_spin_unlock+0x2d/0x50 [ 46.453876] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.459414] ? wbc_attach_and_unlock_inode+0x63c/0xa00 [ 46.464702] __filemap_fdatawrite_range+0x28d/0x370 [ 46.469718] ? delete_from_page_cache_batch+0xec0/0xec0 [ 46.475087] ? fsnotify+0x880/0xf00 [ 46.478715] filemap_write_and_wait+0x47/0xd0 [ 46.483344] __blkdev_put+0x204/0x810 [ 46.487149] ? bd_set_size+0xb0/0xb0 [ 46.490891] ? wait_for_completion+0x440/0x440 [ 46.495624] blkdev_put+0x98/0x560 [ 46.499170] ? blkdev_put+0x560/0x560 [ 46.503137] blkdev_close+0x8b/0xb0 [ 46.506926] __fput+0x2dd/0x8b0 [ 46.510406] ____fput+0x16/0x20 [ 46.513754] task_work_run+0x145/0x1c0 [ 46.517674] do_exit+0x994/0x2fa0 [ 46.521140] ? mm_update_next_owner+0x660/0x660 [ 46.525838] ? up_read+0x1a/0x110 [ 46.529298] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.534850] ? __do_page_fault+0x484/0xe90 [ 46.539088] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 46.543845] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 46.548604] do_group_exit+0x135/0x370 [ 46.552493] __x64_sys_exit_group+0x44/0x50 [ 46.556812] do_syscall_64+0xfd/0x620 [ 46.560701] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.565889] RIP: 0033:0x443b08 [ 46.569088] Code: Bad RIP value. [ 46.572447] RSP: 002b:00007ffd52a64448 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.580155] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443b08 [ 46.587732] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 46.595119] RBP: 00000000004c5bb0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 46.602563] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 46.609931] R13: 00000000006d8a60 R14: 00007ffd52a644e0 R15: 0000000000000000 [ 46.619198] Kernel Offset: disabled [ 46.623043] Rebooting in 86400 seconds..