Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.596611] kauditd_printk_skb: 2 callbacks suppressed [ 49.596627] audit: type=1400 audit(1574962115.883:36): avc: denied { map } for pid=7651 comm="syz-executor058" path="/root/syz-executor058528450" 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 [ 49.675499] audit: type=1804 audit(1574962115.963:37): pid=7651 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-executor058" name="/root/file0" dev="sda1" ino=16484 res=1 [ 49.701376] ------------[ cut here ]------------ [ 49.706393] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 49.715393] WARNING: CPU: 1 PID: 7651 at block/blk-core.c:2177 generic_make_request_checks+0x1fc5/0x24c0 [ 49.725025] Kernel panic - not syncing: panic_on_warn set ... [ 49.725025] [ 49.732990] CPU: 1 PID: 7651 Comm: syz-executor058 Not tainted 4.19.86-syzkaller #0 [ 49.740773] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.750709] Call Trace: [ 49.753425] dump_stack+0x197/0x210 [ 49.757045] panic+0x26a/0x50e [ 49.760262] ? __warn_printk+0xf3/0xf3 [ 49.764289] ? generic_make_request_checks+0x1fc5/0x24c0 [ 49.769743] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.775285] ? __warn.cold+0x5/0x53 [ 49.778907] ? __warn+0xe8/0x1d0 [ 49.782272] ? generic_make_request_checks+0x1fc5/0x24c0 [ 49.787715] __warn.cold+0x20/0x53 [ 49.791245] ? generic_make_request_checks+0x1fc5/0x24c0 [ 49.796687] report_bug+0x263/0x2b0 [ 49.800302] do_error_trap+0x204/0x360 [ 49.804181] ? math_error+0x340/0x340 [ 49.807963] ? wake_up_klogd+0x99/0xd0 [ 49.811832] ? vprintk_emit+0x264/0x690 [ 49.815799] ? vprintk_emit+0x1ab/0x690 [ 49.819763] ? error_entry+0x7c/0xe0 [ 49.823549] ? trace_hardirqs_off_caller+0x65/0x220 [ 49.828554] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.833386] do_invalid_op+0x1b/0x20 [ 49.837087] invalid_op+0x14/0x20 [ 49.840528] RIP: 0010:generic_make_request_checks+0x1fc5/0x24c0 [ 49.846592] 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 [ 49.865487] RSP: 0018:ffff88807a9af1e8 EFLAGS: 00010282 [ 49.870830] RAX: 0000000000000000 RBX: ffff88807a9af2b8 RCX: 0000000000000000 [ 49.878093] RDX: 0000000000000000 RSI: ffffffff815595f6 RDI: ffffed100f535e2f [ 49.885347] RBP: ffff88807a9af2e0 R08: ffff888090aae240 R09: ffffed1015d25079 [ 49.892611] R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: ffff8880a0ddb540 [ 49.899889] R13: ffff8880a0ddb548 R14: 0000000000000000 R15: 0000000000000000 [ 49.907180] ? vprintk_func+0x86/0x189 [ 49.911070] ? generic_make_request_checks+0x1fc5/0x24c0 [ 49.916522] ? trace_event_raw_event_block_rq_requeue+0x600/0x600 [ 49.922922] generic_make_request+0x24c/0x12d0 [ 49.927603] ? blk_get_request+0x710/0x710 [ 49.931836] ? guard_bio_eod+0x1da/0x660 [ 49.935885] ? find_held_lock+0x35/0x130 [ 49.939931] ? guard_bio_eod+0x1da/0x660 [ 49.943982] submit_bio+0xba/0x480 [ 49.947504] ? submit_bio+0xba/0x480 [ 49.951201] ? lock_downgrade+0x880/0x880 [ 49.955333] ? generic_make_request+0x12d0/0x12d0 [ 49.960158] ? kasan_check_read+0x11/0x20 [ 49.964312] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 49.969313] ? guard_bio_eod+0x2a1/0x660 [ 49.973411] submit_bh_wbc+0x5dc/0x790 [ 49.977471] __block_write_full_page+0x76e/0x1010 [ 49.982303] ? check_disk_change+0x140/0x140 [ 49.986773] block_write_full_page+0x21f/0x270 [ 49.991353] ? check_disk_change+0x140/0x140 [ 49.995769] blkdev_writepage+0x25/0x30 [ 49.999754] __writepage+0x62/0xe0 [ 50.003284] write_cache_pages+0x971/0x1670 [ 50.007593] ? __lock_acquire+0x6ee/0x49c0 [ 50.011827] ? tag_pages_for_writeback+0x320/0x320 [ 50.016855] ? clear_page_dirty_for_io+0xff0/0xff0 [ 50.021896] ? mark_held_locks+0x100/0x100 [ 50.026224] ? __lock_acquire+0x6ee/0x49c0 [ 50.030538] generic_writepages+0xe6/0x160 [ 50.034846] ? write_cache_pages+0x1670/0x1670 [ 50.039503] ? mark_held_locks+0x100/0x100 [ 50.043723] ? wbc_attach_and_unlock_inode+0x51a/0xa00 [ 50.048993] ? find_held_lock+0x35/0x130 [ 50.053043] ? blkdev_readpages+0x40/0x40 [ 50.057297] blkdev_writepages+0x1e/0x30 [ 50.061657] do_writepages+0xf3/0x2a0 [ 50.065458] ? page_writeback_cpu_online+0x20/0x20 [ 50.070389] ? do_raw_spin_unlock+0x178/0x270 [ 50.074881] ? _raw_spin_unlock+0x2d/0x50 [ 50.079027] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.085346] ? wbc_attach_and_unlock_inode+0x63c/0xa00 [ 50.090618] __filemap_fdatawrite_range+0x28d/0x370 [ 50.095630] ? delete_from_page_cache_batch+0xec0/0xec0 [ 50.101072] filemap_write_and_wait+0x47/0xd0 [ 50.105574] __blkdev_put+0x204/0x810 [ 50.109371] ? bd_set_size+0xb0/0xb0 [ 50.113097] ? wait_for_completion+0x440/0x440 [ 50.117682] blkdev_put+0x98/0x560 [ 50.121319] ? blkdev_put+0x560/0x560 [ 50.125205] blkdev_close+0x8b/0xb0 [ 50.128823] __fput+0x2dd/0x8b0 [ 50.132094] ____fput+0x16/0x20 [ 50.135389] task_work_run+0x145/0x1c0 [ 50.139286] do_exit+0x994/0x2fa0 [ 50.142752] ? putname+0xef/0x130 [ 50.146248] ? mm_update_next_owner+0x660/0x660 [ 50.150906] ? do_sys_open+0x31d/0x550 [ 50.154783] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.160306] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.165046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.169963] do_group_exit+0x135/0x370 [ 50.173840] __x64_sys_exit_group+0x44/0x50 [ 50.178144] do_syscall_64+0xfd/0x620 [ 50.181944] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.187205] RIP: 0033:0x442c38 [ 50.190379] Code: 00 00 ea dc 40 00 00 00 00 00 c8 de 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 [ 50.209279] RSP: 002b:00007fff9b839848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 50.217496] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442c38 [ 50.224748] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 50.232080] RBP: 00000000004c2548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 50.239353] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 50.246792] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 50.255631] Kernel Offset: disabled [ 50.259335] Rebooting in 86400 seconds..