------------[ cut here ]------------ generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) WARNING: CPU: 0 PID: 3527 at block/blk-core.c:797 bio_check_ro block/blk-core.c:797 [inline] WARNING: CPU: 0 PID: 3527 at block/blk-core.c:797 generic_make_request_checks+0x1d5c/0x2210 block/blk-core.c:902 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 3527 Comm: syz-executor.5 Not tainted 5.4.0-rc8-syzkaller #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+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 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+0x1d5c/0x2210 block/blk-core.c:902 Code: 00 00 44 8b ab 3c 05 00 00 48 8d b5 78 ff ff ff 4c 89 f7 e8 c6 87 05 00 48 c7 c7 60 18 e5 87 48 89 c6 44 89 ea e8 1c f9 13 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 RSP: 0018:ffff88803a72ef20 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8880a2e2e000 RCX: 0000000000000000 RDX: 0000000000013c3d RSI: ffffffff815cf7d6 RDI: ffffed10074e5dd6 RBP: ffff88803a72f020 R08: ffff8880a00542c0 R09: ffffed1015d06159 R10: ffffed1015d06158 R11: ffff8880ae830ac7 R12: ffff888099682e08 R13: 0000000000000000 R14: ffff888099682e00 R15: ffff8880a2f2cef8 generic_make_request+0x8f/0xb50 block/blk-core.c:1018 submit_bio+0x113/0x600 block/blk-core.c:1190 submit_bh_wbc+0x6b6/0x900 fs/buffer.c:3095 __block_write_full_page+0x7fe/0x11b0 fs/buffer.c:1767 block_write_full_page+0x21f/0x270 fs/buffer.c:2953 blkdev_writepage+0x25/0x30 fs/block_dev.c:609 __writepage+0x66/0x110 mm/page-writeback.c:2303 write_cache_pages+0x80c/0x13f0 mm/page-writeback.c:2238 generic_writepages mm/page-writeback.c:2329 [inline] generic_writepages+0xed/0x160 mm/page-writeback.c:2318 blkdev_writepages+0x1e/0x30 fs/block_dev.c:2031 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421 filemap_write_and_wait_range mm/filemap.c:681 [inline] filemap_write_and_wait_range+0xfc/0x1d0 mm/filemap.c:675 generic_file_read_iter+0x1319/0x2c00 mm/filemap.c:2294 blkdev_read_iter+0x120/0x190 fs/block_dev.c:2010 call_read_iter include/linux/fs.h:1889 [inline] do_iter_readv_writev+0x711/0x8f0 fs/read_write.c:691 do_iter_read+0x27c/0x660 fs/read_write.c:933 vfs_readv+0xf0/0x160 fs/read_write.c:997 do_preadv+0x1c4/0x280 fs/read_write.c:1089 __do_sys_preadv fs/read_write.c:1139 [inline] __se_sys_preadv fs/read_write.c:1134 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1134 do_syscall_64+0xfa/0x760 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:00007f8871c43c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a639 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 000000000000000c RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8871c446d4 R13: 00000000004c8050 R14: 00000000004de1b8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..