================================================================== BUG: KCSAN: data-race in jbd2_journal_file_inode / jbd2_journal_submit_inode_data_buffers write to 0xffff888101195cb8 of 8 bytes by task 1675 on cpu 0: jbd2_journal_file_inode+0x17a/0x330 fs/jbd2/transaction.c:2662 jbd2_journal_inode_ranged_write+0x30/0x40 fs/jbd2/transaction.c:2700 ext4_jbd2_inode_add_write fs/ext4/ext4_jbd2.h:418 [inline] ext4_map_blocks+0xe5c/0xff0 fs/ext4/inode.c:739 ext4_iomap_alloc fs/ext4/inode.c:3427 [inline] ext4_iomap_begin+0x513/0x6a0 fs/ext4/inode.c:3477 iomap_apply+0x8d/0x4a0 fs/iomap/apply.c:46 __iomap_dio_rw+0x448/0x9b0 fs/iomap/direct-io.c:517 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:605 ext4_dio_write_iter fs/ext4/file.c:552 [inline] ext4_file_write_iter+0xe6a/0x1060 fs/ext4/file.c:662 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x41a/0x770 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:933 splice_direct_to_actor+0x345/0x650 fs/splice.c:888 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x5e0/0xcf0 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888101195cb8 of 8 bytes by task 4853 on cpu 1: jbd2_journal_submit_inode_data_buffers+0x6f/0xe0 fs/jbd2/commit.c:197 ext4_journal_submit_inode_data_buffers+0x53/0x120 fs/ext4/super.c:533 journal_submit_data_buffers+0xf0/0x260 fs/jbd2/commit.c:256 jbd2_journal_commit_transaction+0x819/0x32b0 fs/jbd2/commit.c:591 kjournald2+0x263/0x480 fs/jbd2/journal.c:213 kthread+0x20b/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 4853 Comm: jbd2/sda1-8 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================