================================================================== BUG: KCSAN: data-race in jbd2_journal_commit_transaction / jbd2_log_wait_commit write to 0xffff888103747c68 of 4 bytes by task 1404 on cpu 0: jbd2_journal_commit_transaction+0x2a77/0x3460 fs/jbd2/commit.c:1154 kjournald2+0x263/0x480 fs/jbd2/journal.c:213 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 read to 0xffff888103747c68 of 4 bytes by task 8359 on cpu 1: jbd2_log_wait_commit+0x100/0x210 fs/jbd2/journal.c:712 jbd2_complete_transaction+0xfb/0x110 fs/jbd2/journal.c:846 ext4_fc_commit+0x231/0x1360 fs/ext4/fast_commit.c:1217 ext4_fsync_journal fs/ext4/fsync.c:115 [inline] ext4_sync_file+0x336/0x6e0 fs/ext4/fsync.c:174 vfs_fsync_range+0x107/0x120 fs/sync.c:182 generic_write_sync include/linux/fs.h:2956 [inline] ext4_buffered_write_iter+0x322/0x380 fs/ext4/file.c:277 ext4_file_write_iter+0x2e7/0x1200 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x2de/0x380 fs/read_write.c:725 do_iter_write+0x192/0x5c0 fs/read_write.c:851 vfs_iter_write+0x4c/0x70 fs/read_write.c:892 iter_file_splice_write+0x43a/0x790 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x650 fs/splice.c:891 do_splice_direct+0x106/0x190 fs/splice.c:979 do_sendfile+0x675/0xc40 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1304 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0xb9/0x140 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000857 -> 0x00000858 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8359 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================