# \[PATCH v2 12/18\] fs: Don't remove suid for CAP\_FSETID in s\_user\_ns

- From: Seth Forshee \<hidden\>
- Date: 2015-12-07 21:21:21 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2015/12/102703
- Thread: https://ratatoskr.run/linux-bcache/2015/12/102821/t.md

```text
Expand the check in should_remove_suid() to keep privileges for
CAP_FSETID in s_user_ns rather than init_user_ns.

Signed-off-by: Seth Forshee <redacted>
Acked-by: Serge Hallyn <redacted>
---
 fs/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/inode.c b/fs/inode.c
index 01c036fe1950..3e7c74da9304 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1684,7 +1684,8 @@ int should_remove_suid(struct dentry *dentry)
 	if (unlikely((mode & S_ISGID) && (mode & S_IXGRP)))
 		kill |= ATTR_KILL_SGID;
 
-	if (unlikely(kill && !capable(CAP_FSETID) && S_ISREG(mode)))
+	if (unlikely(kill && !ns_capable(dentry->d_sb->s_user_ns, CAP_FSETID) &&
+		     S_ISREG(mode)))
 		return kill;
 
 	return 0;
-- 
1.9.1


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