Warning: Permanently added '10.128.0.135' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.945580] kauditd_printk_skb: 2 callbacks suppressed [ 51.945596] audit: type=1400 audit(1574958436.074:36): avc: denied { map } for pid=7643 comm="syz-executor827" path="/root/syz-executor827717482" 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 [ 52.032057] audit: type=1804 audit(1574958436.164:37): pid=7643 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-executor827" name="/root/file0" dev="sda1" ino=16484 res=1 [ 52.059018] ------------[ cut here ]------------ [ 52.068648] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 52.077813] WARNING: CPU: 0 PID: 7643 at block/blk-core.c:2177 generic_make_request_checks+0x1fc5/0x24c0 [ 52.087553] Kernel panic - not syncing: panic_on_warn set ... [ 52.087553] [ 52.094908] CPU: 0 PID: 7643 Comm: syz-executor827 Not tainted 4.19.86-syzkaller #0 [ 52.102687] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.112286] Call Trace: [ 52.114862] dump_stack+0x197/0x210 [ 52.118475] panic+0x26a/0x50e [ 52.121650] ? __warn_printk+0xf3/0xf3 [ 52.125544] ? generic_make_request_checks+0x1fc5/0x24c0 [ 52.131007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.136550] ? __warn.cold+0x5/0x53 [ 52.140215] ? __warn+0xe8/0x1d0 [ 52.143580] ? generic_make_request_checks+0x1fc5/0x24c0 [ 52.149015] __warn.cold+0x20/0x53 [ 52.152605] ? trace_hardirqs_on+0x67/0x220 [ 52.156917] ? generic_make_request_checks+0x1fc5/0x24c0 [ 52.162356] report_bug+0x263/0x2b0 [ 52.165984] do_error_trap+0x204/0x360 [ 52.169878] ? math_error+0x340/0x340 [ 52.173684] ? wake_up_klogd+0x99/0xd0 [ 52.177562] ? vprintk_emit+0x1ab/0x690 [ 52.181550] ? error_entry+0x7c/0xe0 [ 52.185261] ? trace_hardirqs_off_caller+0x65/0x220 [ 52.190278] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.195139] do_invalid_op+0x1b/0x20 [ 52.198842] invalid_op+0x14/0x20 [ 52.202317] RIP: 0010:generic_make_request_checks+0x1fc5/0x24c0 [ 52.208391] 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 [ 52.227293] RSP: 0018:ffff888082caf1e8 EFLAGS: 00010282 [ 52.232653] RAX: 0000000000000000 RBX: ffff888082caf2b8 RCX: 0000000000000000 [ 52.239912] RDX: 0000000000000000 RSI: ffffffff815595f6 RDI: ffffed1010595e2f [ 52.247201] RBP: ffff888082caf2e0 R08: ffff8880892fc4c0 R09: ffff8880892fcd60 [ 52.254467] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a8be4140 [ 52.261736] R13: ffff8880a8be4148 R14: 0000000000000000 R15: 0000000000000000 [ 52.269011] ? vprintk_func+0x86/0x189 [ 52.272893] ? generic_make_request_checks+0x1fc5/0x24c0 [ 52.278354] ? trace_event_raw_event_block_rq_requeue+0x600/0x600 [ 52.284608] generic_make_request+0x24c/0x12d0 [ 52.289182] ? blk_get_request+0x710/0x710 [ 52.293405] ? guard_bio_eod+0x1da/0x660 [ 52.297538] ? find_held_lock+0x35/0x130 [ 52.301584] ? guard_bio_eod+0x1da/0x660 [ 52.305634] submit_bio+0xba/0x480 [ 52.309156] ? submit_bio+0xba/0x480 [ 52.312855] ? lock_downgrade+0x880/0x880 [ 52.316992] ? generic_make_request+0x12d0/0x12d0 [ 52.321822] ? kasan_check_read+0x11/0x20 [ 52.325956] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 52.330970] ? guard_bio_eod+0x2a1/0x660 [ 52.335019] submit_bh_wbc+0x5dc/0x790 [ 52.338915] __block_write_full_page+0x76e/0x1010 [ 52.343742] ? check_disk_change+0x140/0x140 [ 52.348148] block_write_full_page+0x21f/0x270 [ 52.352715] ? check_disk_change+0x140/0x140 [ 52.357111] blkdev_writepage+0x25/0x30 [ 52.361071] __writepage+0x62/0xe0 [ 52.364603] write_cache_pages+0x971/0x1670 [ 52.368926] ? __lock_acquire+0x6ee/0x49c0 [ 52.373161] ? tag_pages_for_writeback+0x320/0x320 [ 52.378079] ? clear_page_dirty_for_io+0xff0/0xff0 [ 52.382995] ? mark_held_locks+0x100/0x100 [ 52.387233] ? __lock_acquire+0x6ee/0x49c0 [ 52.391467] generic_writepages+0xe6/0x160 [ 52.395692] ? write_cache_pages+0x1670/0x1670 [ 52.400266] ? mark_held_locks+0x100/0x100 [ 52.404500] ? wbc_attach_and_unlock_inode+0x51a/0xa00 [ 52.409780] ? find_held_lock+0x35/0x130 [ 52.413831] ? blkdev_readpages+0x40/0x40 [ 52.417964] blkdev_writepages+0x1e/0x30 [ 52.422016] do_writepages+0xf3/0x2a0 [ 52.425827] ? page_writeback_cpu_online+0x20/0x20 [ 52.430748] ? do_raw_spin_unlock+0x178/0x270 [ 52.435247] ? _raw_spin_unlock+0x2d/0x50 [ 52.439396] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.444921] ? wbc_attach_and_unlock_inode+0x63c/0xa00 [ 52.450187] __filemap_fdatawrite_range+0x28d/0x370 [ 52.455212] ? delete_from_page_cache_batch+0xec0/0xec0 [ 52.460579] filemap_write_and_wait+0x47/0xd0 [ 52.465064] __blkdev_put+0x204/0x810 [ 52.468855] ? bd_set_size+0xb0/0xb0 [ 52.472555] ? wait_for_completion+0x440/0x440 [ 52.477127] blkdev_put+0x98/0x560 [ 52.480666] ? blkdev_put+0x560/0x560 [ 52.484466] blkdev_close+0x8b/0xb0 [ 52.488078] __fput+0x2dd/0x8b0 [ 52.491360] ____fput+0x16/0x20 [ 52.494626] task_work_run+0x145/0x1c0 [ 52.498502] do_exit+0x994/0x2fa0 [ 52.501951] ? putname+0xef/0x130 [ 52.505406] ? mm_update_next_owner+0x660/0x660 [ 52.510073] ? do_sys_open+0x31d/0x550 [ 52.513950] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.519484] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.524222] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.528983] do_group_exit+0x135/0x370 [ 52.532857] __x64_sys_exit_group+0x44/0x50 [ 52.537161] do_syscall_64+0xfd/0x620 [ 52.540950] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.546121] RIP: 0033:0x442c38 [ 52.549315] Code: Bad RIP value. [ 52.552666] RSP: 002b:00007ffccb7e90d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 52.560361] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442c38 [ 52.567615] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 52.574879] RBP: 00000000004c2548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 52.582133] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 52.589395] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 52.598292] Kernel Offset: disabled [ 52.602013] Rebooting in 86400 seconds..