[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.61' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 46.204181] audit: type=1400 audit(1597737348.653:8): avc: denied { execmem } for pid=6436 comm="syz-executor973" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 46.243172] ------------[ cut here ]------------ [ 46.252819] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 46.264920] WARNING: CPU: 0 PID: 6445 at block/blk-core.c:2180 generic_make_request_checks+0x17d9/0x22e0 [ 46.274545] Kernel panic - not syncing: panic_on_warn set ... [ 46.274545] [ 46.281899] CPU: 0 PID: 6445 Comm: syz-executor973 Not tainted 4.19.139-syzkaller #0 [ 46.289781] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.299224] Call Trace: [ 46.301799] dump_stack+0x1fc/0x2fe [ 46.305426] panic+0x26a/0x50e [ 46.308634] ? __warn_printk+0xf3/0xf3 [ 46.312523] ? generic_make_request_checks+0x17d9/0x22e0 [ 46.317958] ? __probe_kernel_read+0x16c/0x1b0 [ 46.322519] ? __warn.cold+0x5/0x61 [ 46.326133] ? __warn+0xe4/0x200 [ 46.329492] ? generic_make_request_checks+0x17d9/0x22e0 [ 46.334927] __warn.cold+0x20/0x61 [ 46.338495] ? generic_make_request_checks+0x17d9/0x22e0 [ 46.343935] report_bug+0x262/0x2b0 [ 46.347589] do_error_trap+0x1d7/0x310 [ 46.351479] ? math_error+0x310/0x310 [ 46.355273] ? __irq_work_queue_local+0x101/0x160 [ 46.360185] ? irq_work_queue+0x29/0x80 [ 46.364157] ? wake_up_klogd.part.0+0x8c/0xc0 [ 46.368635] ? vprintk_emit+0x1d0/0x740 [ 46.372590] ? trace_hardirqs_off_caller+0x69/0x210 [ 46.377606] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.382441] invalid_op+0x14/0x20 [ 46.385884] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 [ 46.391965] Code: ca 0a 00 00 45 8b b6 e4 04 00 00 48 8d 74 24 68 48 89 ef e8 99 41 06 00 48 c7 c7 00 56 c9 87 48 89 c6 44 89 f2 e8 62 66 f3 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 46.410886] RSP: 0018:ffff8880a7b97360 EFLAGS: 00010282 [ 46.416263] RAX: 0000000000000000 RBX: ffff8880a3df8000 RCX: 0000000000000000 [ 46.423521] RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed1014f72e5e [ 46.430771] RBP: ffff8880947df340 R08: 0000000000000001 R09: 0000000000000000 [ 46.438022] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880947df370 [ 46.445282] R13: ffff8880947df348 R14: 0000000000000000 R15: 0000000000000000 [ 46.452549] ? vprintk_func+0x81/0x17e [ 46.456454] ? should_fail_bio.isra.0+0xa0/0xa0 [ 46.461108] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 46.466116] ? kmem_cache_alloc+0x315/0x370 [ 46.470434] generic_make_request+0x23f/0xdf0 [ 46.474913] ? blk_put_request+0x110/0x110 [ 46.479133] ? sb_mark_inode_writeback+0xc8/0x490 [ 46.483982] submit_bio+0xb1/0x430 [ 46.487514] ? generic_make_request+0xdf0/0xdf0 [ 46.492170] ? check_preemption_disabled+0x41/0x280 [ 46.497191] ? guard_bio_eod+0x2a0/0x640 [ 46.501341] submit_bh_wbc+0x5a7/0x760 [ 46.505221] __block_write_full_page+0x71a/0xf60 [ 46.509988] ? block_llseek+0xc0/0xc0 [ 46.513805] block_write_full_page+0x202/0x270 [ 46.518376] ? block_llseek+0xc0/0xc0 [ 46.522177] __writepage+0x5e/0xe0 [ 46.525713] write_cache_pages+0x802/0x12d0 [ 46.530032] ? tag_pages_for_writeback+0x2f0/0x2f0 [ 46.534981] ? clear_page_dirty_for_io+0xee0/0xee0 [ 46.539918] ? __lock_acquire+0x6de/0x3ff0 [ 46.544160] ? __lock_acquire+0x6de/0x3ff0 [ 46.548513] ? blkdev_readpages+0x30/0x30 [ 46.552662] generic_writepages+0xdb/0x150 [ 46.557037] ? dirty_poll_interval.part.0+0x30/0x30 [ 46.562058] ? mark_held_locks+0xf0/0xf0 [ 46.568048] ? do_syscall_64+0xf9/0x620 [ 46.572737] do_writepages+0xe5/0x290 [ 46.576565] ? page_writeback_cpu_online+0x10/0x10 [ 46.582019] ? do_raw_spin_unlock+0x171/0x230 [ 46.587731] ? _raw_spin_unlock+0x29/0x40 [ 46.591865] ? wbc_attach_and_unlock_inode+0x11d/0x9e0 [ 46.597149] __filemap_fdatawrite_range+0x27d/0x350 [ 46.603222] ? delete_from_page_cache_batch+0xcc0/0xcc0 [ 46.608585] ? lock_downgrade+0x720/0x720 [ 46.612723] ? locks_remove_file+0x2c8/0x450 [ 46.617123] ? blkdev_put+0x30/0x520 [ 46.620826] filemap_write_and_wait+0x42/0xd0 [ 46.625320] __blkdev_put+0x1bb/0x7b0 [ 46.629123] ? fsync_bdev+0xc0/0xc0 [ 46.632742] ? blkdev_put+0x85/0x520 [ 46.636460] ? blkdev_put+0x520/0x520 [ 46.640367] blkdev_close+0x86/0xb0 [ 46.643985] __fput+0x2ce/0x890 [ 46.647277] task_work_run+0x148/0x1c0 [ 46.651152] do_exit+0xbb2/0x2b70 [ 46.654598] ? lock_downgrade+0x720/0x720 [ 46.658732] ? mm_update_next_owner+0x650/0x650 [ 46.663386] ? up_read+0x17/0x110 [ 46.666835] ? __do_page_fault+0x1ca/0xde0 [ 46.671060] do_group_exit+0x125/0x310 [ 46.674935] __x64_sys_exit_group+0x3a/0x50 [ 46.679259] do_syscall_64+0xf9/0x620 [ 46.683058] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.688232] RIP: 0033:0x443d38 [ 46.691407] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 46.710297] RSP: 002b:00007fff97afaea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.718021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443d38 [ 46.725298] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 46.732643] RBP: 00000000004c36f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 46.739920] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 46.747179] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 46.755659] Kernel Offset: disabled [ 46.759327] Rebooting in 86400 seconds..