WARNING: CPU: 0 PID: 20465 at block/blk-core.c:871 bio_check_ro block/blk-core.c:871 [inline]
WARNING: CPU: 0 PID: 20465 at block/blk-core.c:871 generic_make_request_checks+0x1a88/0x1f40 block/blk-core.c:1012
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 20465 Comm: syz-executor.5 Not tainted 5.8.0-rc3-next-20200701-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:bio_check_ro block/blk-core.c:871 [inline]
RIP: 0010:generic_make_request_checks+0x1a88/0x1f40 block/blk-core.c:1012
Code: 04 00 00 45 8b a4 24 a4 05 00 00 48 8d 74 24 78 48 89 ef e8 2a 29 fe ff 48 c7 c7 e0 bf 91 88 48 89 c6 44 89 e2 e8 6a 0a c1 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02
RSP: 0018:ffffc90019c0ecd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a1311080 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815d7e47 RDI: fffff52003381d8d
RBP: ffff888091cbe3c0 R08: 0000000000000001 R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888091cbe3c8 R14: 0000000000000000 R15: 0000000000000001
 generic_make_request+0x89/0xc00 block/blk-core.c:1141
 submit_bio+0x263/0x5b0 block/blk-core.c:1304
 submit_bh_wbc+0x68d/0x8e0 fs/buffer.c:3110
 __block_write_full_page+0x837/0x12e0 fs/buffer.c:1848
 block_write_full_page+0x214/0x270 fs/buffer.c:3034
 __writepage+0x60/0x170 mm/page-writeback.c:2311
 write_cache_pages+0x736/0x11b0 mm/page-writeback.c:2246
 generic_writepages mm/page-writeback.c:2337 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2326
 do_writepages+0xec/0x290 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0x2a1/0x380 mm/filemap.c:422
 file_write_and_wait_range+0x169/0x200 mm/filemap.c:761
 blkdev_fsync+0x67/0xd0 fs/block_dev.c:664
 vfs_fsync_range+0x13a/0x220 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2746 [inline]
 blkdev_write_iter+0x39c/0x4d0 fs/block_dev.c:2025
 call_write_iter include/linux/fs.h:1877 [inline]
 do_iter_readv_writev+0x567/0x780 fs/read_write.c:694
 do_iter_write+0x188/0x5f0 fs/read_write.c:999
 vfs_iter_write+0x70/0xa0 fs/read_write.c:1040
 iter_file_splice_write+0x721/0xbe0 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0x171/0x2f0 fs/splice.c:1016
 splice_direct_to_actor+0x38c/0x980 fs/splice.c:971
 do_splice_direct+0x1b3/0x280 fs/splice.c:1059
 do_sendfile+0x559/0xc30 fs/read_write.c:1521
 __do_sys_sendfile64 fs/read_write.c:1582 [inline]
 __se_sys_sendfile64 fs/read_write.c:1568 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1568
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f752ac00c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00000000004fd6e0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000080006 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000902 R14: 00000000004cbe0a R15: 00007f752ac016d4
Kernel Offset: disabled
Rebooting in 86400 seconds..