From: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
[ Upstream commit 5b8ca5a54cb89ab07b0389f50e038e533cdfdd86 ]
This is needed to properly clear suid/sgid.
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/fuse/file.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index ceb9f7d230388..eb2a3ffb1e816 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1301,6 +1301,7 @@ static ssize_t fuse_perform_write(struct kiocb *iocb, struct iov_iter *ii)
static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
+ struct mnt_idmap *idmap = file_mnt_idmap(file);
struct address_space *mapping = file->f_mapping;
ssize_t written = 0;
struct inode *inode = mapping->host;
@@ -1315,7 +1316,7 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
return err;
if (fc->handle_killpriv_v2 &&
- setattr_should_drop_suidgid(&nop_mnt_idmap,
+ setattr_should_drop_suidgid(idmap,
file_inode(file))) {
goto writethrough;
}
--
2.43.0
