As local filesystem, writing data to the file by non-owner will
clears the SUID+SGID, owner will not.
Signed-off-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
---
fs/nfsd/vfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 16f0673..19c0931 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -943,7 +943,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh
*fhp, struct file *file,
fsnotify_modify(file);
/* clear setuid/setgid flag after write */
- if (inode->i_mode & (S_ISUID | S_ISGID))
+ if (should_remove_suid(dentry))
kill_suid(dentry);
if (stable) {
--
1.9.0
--
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