------------[ cut here ]------------ generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) WARNING: CPU: 0 PID: 15151 at block/blk-core.c:800 bio_check_ro block/blk-core.c:797 [inline] WARNING: CPU: 0 PID: 15151 at block/blk-core.c:800 generic_make_request_checks+0x633/0x1a60 block/blk-core.c:902 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 15151 Comm: syz-executor.0 Not tainted 5.4.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 panic+0x264/0x7a9 kernel/panic.c:221 __warn+0x20e/0x210 kernel/panic.c:582 report_bug+0x1b6/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 RIP: 0010:bio_check_ro block/blk-core.c:797 [inline] RIP: 0010:generic_make_request_checks+0x633/0x1a60 block/blk-core.c:902 Code: 3c 05 00 00 4c 89 f8 48 c1 e8 03 8a 04 08 84 c0 0f 85 17 14 00 00 41 8b 17 48 c7 c7 73 98 40 88 4c 89 f6 31 c0 e8 cd 5c 14 fe <0f> 0b e9 35 fc ff ff e8 41 c6 41 fe c6 05 f6 55 89 05 01 48 c7 c7 RSP: 0018:ffff8880283e7440 EFLAGS: 00010246 RAX: f874c5c2772f6800 RBX: 0000000000000001 RCX: ffff888096926400 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff8880283e7500 R08: ffffffff815cc0b4 R09: ffffed1015d46120 R10: ffffed1015d46120 R11: 0000000000000000 R12: ffff8880939415c8 R13: 1ffff110127282b9 R14: ffff8880283e74a0 R15: ffff8880a2e9d53c generic_make_request+0x33/0x980 block/blk-core.c:1018 submit_bio+0x26b/0x540 block/blk-core.c:1190 submit_bh_wbc+0x619/0x700 fs/buffer.c:3095 __block_write_full_page+0x943/0x1070 fs/buffer.c:1767 block_write_full_page+0x1a4/0x220 include/linux/highmem.h:102 blkdev_writepage+0x24/0x30 fs/block_dev.c:609 __writepage+0x63/0xd0 mm/page-writeback.c:2303 write_cache_pages+0x94a/0xe70 mm/page-writeback.c:2238 generic_writepages+0x93/0xd0 mm/page-writeback.c:2329 blkdev_writepages+0x1d/0x30 fs/block_dev.c:2031 do_writepages+0xfb/0x1f0 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x2c2/0x360 mm/filemap.c:421 __filemap_fdatawrite mm/filemap.c:429 [inline] filemap_fdatawrite mm/filemap.c:434 [inline] filemap_write_and_wait+0xca/0x160 mm/filemap.c:640 __sync_blockdev fs/block_dev.c:491 [inline] sync_blockdev fs/block_dev.c:500 [inline] __blkdev_put+0x1a2/0x6d0 fs/block_dev.c:1860 blkdev_put+0x2c8/0x3b0 fs/block_dev.c:1929 blkdev_close+0x7b/0xa0 fs/block_dev.c:1936 __fput+0x2e4/0x740 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:313 task_work_run+0x17e/0x1b0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x5e8/0x2190 kernel/exit.c:817 do_group_exit+0x15c/0x2b0 kernel/exit.c:921 __do_sys_exit_group+0x17/0x20 kernel/exit.c:932 __se_sys_exit_group+0x14/0x20 kernel/exit.c:930 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:930 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdd7928ad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045a639 RDX: 00000000004141d1 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffdd7928b30 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdd7928b30 R14: 0000000000000000 R15: 00007ffdd7928b40 Kernel Offset: disabled Rebooting in 86400 seconds..