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| author | Yu Peng <pengyu@kylinos.cn> | 2026-07-08 16:02:32 +0800 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-07-31 10:09:11 +0200 |
| commit | c610d2d0787961cdd6fc1de69d9be1ff3687e1a6 (patch) | |
| tree | 21a84daf1a8483fd525a7d16eff4825911109c73 /init | |
| parent | f797d7b64eb46bb16b51cdfdb72f915f31d4c11b (diff) | |
fs: annotate inode timestamp accessors
syzbot reported a KCSAN race between fill_mg_cmtime() and
inode_set_ctime_to_ts() on inode->i_ctime_{sec,nsec}.
stat/getattr can sample inode timestamps while update paths store new
values concurrently, so KCSAN can report benign races on these fields.
Annotate the timestamp accessors with READ_ONCE()/WRITE_ONCE(), and use
the ctime accessor for the remaining ctime loads. This avoids the KCSAN
reports without changing timestamp semantics.
Fixes: 4e40eff0b573 ("fs: add infrastructure for multigrain timestamps")
Reported-by: syzbot+8b3bd9f8a06658479d4a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=8b3bd9f8a06658479d4a
Signed-off-by: Yu Peng <pengyu@kylinos.cn>
Link: https://patch.msgid.link/20260708080232.2564807-1-pengyu@kylinos.cn
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions