------------[ cut here ]------------ generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) WARNING: CPU: 0 PID: 11671 at block/blk-core.c:758 bio_check_ro block/blk-core.c:758 [inline] WARNING: CPU: 0 PID: 11671 at block/blk-core.c:758 generic_make_request_checks+0x1c0c/0x2070 block/blk-core.c:863 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11671 Comm: syz-executor427 Not tainted 5.2.0-rc4+ #26 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x744 kernel/panic.c:219 __warn.cold+0x20/0x4d kernel/panic.c:576 report_bug+0x263/0x2b0 lib/bug.c:186 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+0x14/0x20 arch/x86/entry/entry_64.S:986 RIP: 0010:bio_check_ro block/blk-core.c:758 [inline] RIP: 0010:generic_make_request_checks+0x1c0c/0x2070 block/blk-core.c:863 Code: 00 00 44 8b ab b4 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 f6 76 05 00 48 c7 c7 a0 1b a3 87 48 89 c6 44 89 ea e8 92 71 21 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:ffff888086906f80 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8880a3023280 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815ac976 RDI: ffffed1010d20de2 RBP: ffff888086907080 R08: ffff88808b66c5c0 R09: ffffed1015d06011 R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff888089b1f008 R13: 0000000000000000 R14: 0000000000000001 R15: ffff888089b1f000 generic_make_request+0x8f/0xb40 block/blk-core.c:975 submit_bio+0xba/0x480 block/blk-core.c:1129 submit_bh_wbc+0x5f7/0x7f0 fs/buffer.c:3099 __block_write_full_page+0x76e/0x1020 fs/buffer.c:1767 block_write_full_page+0x21f/0x270 fs/buffer.c:2957 blkdev_writepage+0x25/0x30 fs/block_dev.c:621 __writepage+0x62/0xe0 mm/page-writeback.c:2301 write_cache_pages+0x7bf/0x1380 mm/page-writeback.c:2236 generic_writepages mm/page-writeback.c:2327 [inline] generic_writepages+0xed/0x160 mm/page-writeback.c:2316 blkdev_writepages+0x1e/0x30 fs/block_dev.c:2004 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2342 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:419 __filemap_fdatawrite mm/filemap.c:427 [inline] filemap_fdatawrite mm/filemap.c:432 [inline] filemap_write_and_wait mm/filemap.c:613 [inline] filemap_write_and_wait+0x47/0xd0 mm/filemap.c:608 __sync_blockdev fs/block_dev.c:503 [inline] sync_blockdev fs/block_dev.c:512 [inline] __blkdev_put+0x204/0x810 fs/block_dev.c:1836 blkdev_put+0x98/0x560 fs/block_dev.c:1905 blkdev_close+0x8b/0xb0 fs/block_dev.c:1912 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:877 do_group_exit+0x135/0x370 kernel/exit.c:981 get_signal+0x471/0x24b0 kernel/signal.c:2640 do_signal+0x87/0x1900 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4472a9 Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fabc35a3db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006dcc28 RCX: 00000000004472a9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc28 RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c R13: 00007fffce9a306f R14: 00007fabc35a49c0 R15: 20c49ba5e353f7cf Kernel Offset: disabled Rebooting in 86400 seconds..