================================================================== BUG: KCSAN: data-race in jbd2_journal_commit_transaction / jbd2_log_wait_commit write to 0xffff888102916468 of 4 bytes by task 343 on cpu 1: jbd2_journal_commit_transaction+0x2ad5/0x3430 fs/jbd2/commit.c:1154 kjournald2+0x268/0x490 fs/jbd2/journal.c:213 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 read to 0xffff888102916468 of 4 bytes by task 25132 on cpu 0: jbd2_log_wait_commit+0x100/0x210 fs/jbd2/journal.c:712 jbd2_complete_transaction+0x101/0x110 fs/jbd2/journal.c:846 ext4_fc_commit+0x24e/0x14c0 fs/ext4/fast_commit.c:1215 ext4_fsync_journal fs/ext4/fsync.c:115 [inline] ext4_sync_file+0x336/0x670 fs/ext4/fsync.c:174 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2955 [inline] ext4_buffered_write_iter+0x3af/0x400 fs/ext4/file.c:277 ext4_file_write_iter+0x2e7/0x11f0 call_write_iter include/linux/fs.h:2163 [inline] do_iter_readv_writev+0x2de/0x380 fs/read_write.c:729 do_iter_write+0x192/0x5c0 fs/read_write.c:855 vfs_iter_write+0x4c/0x70 fs/read_write.c:896 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+0x63e/0xbb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000247b -> 0x0000247c Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25132 Comm: syz-executor.3 Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================