================================================================== BUG: KCSAN: data-race in ext4_mark_iloc_dirty / ext4_mark_iloc_dirty write to 0xffff88813b48be68 of 4 bytes by task 3667 on cpu 0: ext4_update_inode_fsync_trans fs/ext4/ext4_jbd2.h:445 [inline] ext4_do_update_inode fs/ext4/inode.c:5125 [inline] ext4_mark_iloc_dirty+0x789/0x890 fs/ext4/inode.c:5694 __ext4_mark_inode_dirty+0x4ec/0x5f0 fs/ext4/inode.c:5890 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5919 __mark_inode_dirty+0x72/0x6c0 fs/fs-writeback.c:2399 generic_update_time fs/inode.c:1782 [inline] inode_update_time+0x1b4/0x1d0 fs/inode.c:1795 file_update_time+0x1f3/0x230 fs/inode.c:2012 file_modified+0x62/0x80 fs/inode.c:2035 ext4_write_checks fs/ext4/file.c:247 [inline] ext4_buffered_write_iter+0x1f2/0x380 fs/ext4/file.c:264 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:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x102/0x140 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 write to 0xffff88813b48be68 of 4 bytes by task 3669 on cpu 1: ext4_update_inode_fsync_trans fs/ext4/ext4_jbd2.h:445 [inline] ext4_do_update_inode fs/ext4/inode.c:5125 [inline] ext4_mark_iloc_dirty+0x789/0x890 fs/ext4/inode.c:5694 __ext4_mark_inode_dirty+0x4ec/0x5f0 fs/ext4/inode.c:5890 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5919 __mark_inode_dirty+0x72/0x6c0 fs/fs-writeback.c:2399 generic_update_time fs/inode.c:1782 [inline] inode_update_time fs/inode.c:1795 [inline] touch_atime+0x1c4/0x2e0 fs/inode.c:1867 file_accessed include/linux/fs.h:2505 [inline] filemap_read+0x1648/0x16d0 mm/filemap.c:2714 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2792 ext4_file_read_iter+0x1db/0x290 call_read_iter include/linux/fs.h:2156 [inline] generic_file_splice_read+0x24f/0x330 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870 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:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x102/0x140 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: 0x00005aa1 -> 0x00005aa3 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3669 Comm: syz-executor.5 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================