================================================================== BUG: KCSAN: data-race in ext4_es_lookup_extent / ext4_es_lookup_extent read to 0xffff888126b73c28 of 8 bytes by task 7479 on cpu 1: ext4_es_lookup_extent+0x3ba/0x510 fs/ext4/extents_status.c:950 ext4_map_blocks+0xc2/0xf70 fs/ext4/inode.c:530 _ext4_get_block+0x12d/0x2b0 fs/ext4/inode.c:791 ext4_dio_get_block fs/ext4/inode.c:868 [inline] ext4_dio_get_block+0x9f/0xb0 fs/ext4/inode.c:861 get_more_blocks fs/direct-io.c:710 [inline] do_direct_IO+0x1409/0x59b0 fs/direct-io.c:995 do_blockdev_direct_IO+0x6b7/0x4cc0 fs/direct-io.c:1327 __blockdev_direct_IO+0x86/0xa0 fs/direct-io.c:1413 ext4_direct_IO_read fs/ext4/inode.c:3881 [inline] ext4_direct_IO+0x32f/0xf70 fs/ext4/inode.c:3913 generic_file_read_iter+0x1b0/0x1440 mm/filemap.c:2323 ext4_file_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0xfa/0x240 fs/ext4/file.c:65 call_read_iter include/linux/fs.h:1864 [inline] generic_file_splice_read+0x35c/0x500 fs/splice.c:307 do_splice_to+0xf2/0x130 fs/splice.c:877 splice_direct_to_actor+0x1a1/0x510 fs/splice.c:954 do_splice_direct+0x161/0x1e0 fs/splice.c:1063 write to 0xffff888126b73c28 of 8 bytes by task 7480 on cpu 0: ext4_es_lookup_extent+0x3d3/0x510 fs/ext4/extents_status.c:950 ext4_map_blocks+0xc2/0xf70 fs/ext4/inode.c:530 _ext4_get_block+0x12d/0x2b0 fs/ext4/inode.c:791 ext4_get_block_trans+0xf4/0x1d0 fs/ext4/inode.c:852 ext4_dio_get_block_unwritten_sync+0x59/0xc0 fs/ext4/inode.c:924 get_more_blocks fs/direct-io.c:710 [inline] do_direct_IO+0x1409/0x59b0 fs/direct-io.c:995 do_blockdev_direct_IO+0x6b7/0x4cc0 fs/direct-io.c:1327 __blockdev_direct_IO+0x86/0xa0 fs/direct-io.c:1413 ext4_direct_IO_write fs/ext4/inode.c:3788 [inline] ext4_direct_IO+0x6f5/0xf70 fs/ext4/inode.c:3915 generic_file_direct_write+0x14d/0x2e0 mm/filemap.c:3230 __generic_file_write_iter+0x17e/0x380 mm/filemap.c:3413 ext4_file_write_iter+0x1fc/0xa40 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1870 [inline] do_iter_readv_writev+0x487/0x5b0 fs/read_write.c:693 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7480 Comm: syz-executor.0 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================