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NFS: nfs_setattr_update_inode() should clear the suid/sgid bits

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When we do a 'chown' or 'chgrp', the server will clear the suid/sgid
bits. Ensure that we mirror that in nfs_setattr_update_inode().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2021-04-12 20:08:00 -04:00
parent 63cdd7edfd
commit 1f9f432815
1 changed files with 8 additions and 2 deletions
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10
fs/nfs/inode.c
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@ -636,8 +636,7 @@ nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
}
/* Optimization: if the end result is no change, don't RPC */
attr->ia_valid &= NFS_VALID_ATTRS;
if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
return 0;
trace_nfs_setattr_enter(inode);
@ -719,6 +718,13 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
}
if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
inode->i_mode & S_ISUID)
inode->i_mode &= ~S_ISUID;
if ((attr->ia_valid & ATTR_KILL_SGID) != 0 &&
(inode->i_mode & (S_ISGID | S_IXGRP)) ==
(S_ISGID | S_IXGRP))
inode->i_mode &= ~S_ISGID;
if ((attr->ia_valid & ATTR_MODE) != 0) {
int mode = attr->ia_mode & S_IALLUGO;
mode |= inode->i_mode & ~S_IALLUGO;