diff options
| author | Christian Brauner <brauner@kernel.org> | 2025-10-29 13:20:17 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-10-31 10:16:24 +0100 |
| commit | b21cba8d8719881d7a9c8b746bc932be881af4c8 (patch) | |
| tree | e33449bd30e4a0a1e273f0a88d53a04066140a47 | |
| parent | 6dbe134e4bf775572c87aba5a39654c0dbd875a4 (diff) | |
pidfs: raise DCACHE_DONTCACHE explicitly
While pidfs dentries are never hashed and thus retain_dentry() will never
consider them for placing them on the LRU it isn't great to always have
to go and remember that. Raise DCACHE_DONTCACHE explicitly as a visual
marker that dentries aren't kept but freed immediately instead.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-4-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | fs/pidfs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/pidfs.c b/fs/pidfs.c index 0ef5b47d796a..db236427fc2c 100644 --- a/fs/pidfs.c +++ b/fs/pidfs.c @@ -1022,6 +1022,7 @@ static int pidfs_init_fs_context(struct fs_context *fc) fc->s_iflags |= SB_I_NOEXEC; fc->s_iflags |= SB_I_NODEV; + ctx->s_d_flags |= DCACHE_DONTCACHE; ctx->ops = &pidfs_sops; ctx->eops = &pidfs_export_operations; ctx->dops = &pidfs_dentry_operations; |