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..