================================================================== BUG: KCSAN: data-race in wbc_detach_inode / wbc_detach_inode read to 0xffff88812abf729c of 2 bytes by task 11280 on cpu 1: wbc_detach_inode+0x95/0x520 fs/fs-writeback.c:639 __filemap_fdatawrite_range+0x1d4/0x230 mm/filemap.c:422 filemap_write_and_wait_range mm/filemap.c:681 [inline] filemap_write_and_wait_range+0xb1/0x150 mm/filemap.c:675 generic_file_read_iter+0x1015/0x1440 mm/filemap.c:2294 blkdev_read_iter+0xb2/0xe0 fs/block_dev.c:2039 call_read_iter include/linux/fs.h:1896 [inline] do_iter_readv_writev+0x54b/0x5b0 fs/read_write.c:691 do_iter_read+0x1fc/0x3d0 fs/read_write.c:933 vfs_readv+0x9c/0xf0 fs/read_write.c:997 do_preadv+0x131/0x1d0 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+0x61/0x80 fs/read_write.c:1134 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88812abf729c of 2 bytes by task 11290 on cpu 0: wbc_detach_inode+0x260/0x520 fs/fs-writeback.c:705 __filemap_fdatawrite_range+0x1d4/0x230 mm/filemap.c:422 filemap_write_and_wait_range mm/filemap.c:681 [inline] filemap_write_and_wait_range+0xb1/0x150 mm/filemap.c:675 generic_file_read_iter+0x1015/0x1440 mm/filemap.c:2294 blkdev_read_iter+0xb2/0xe0 fs/block_dev.c:2039 call_read_iter include/linux/fs.h:1896 [inline] do_iter_readv_writev+0x54b/0x5b0 fs/read_write.c:691 do_iter_read+0x1fc/0x3d0 fs/read_write.c:933 vfs_readv+0x9c/0xf0 fs/read_write.c:997 do_preadv+0x131/0x1d0 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+0x61/0x80 fs/read_write.c:1134 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11290 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================