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util: virfile: Only setuid for virFileRemove if on NFS

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NFS with root-squash is the only reason we need to do setuid/setgid
crazyness in virFileRemove, so limit that behavior to the NFS case.
This commit is contained in:
Cole Robinson 2016-03-09 12:20:37 -05:00
parent 7cf5343709
commit adefc561cc
1 changed files with 9 additions and 2 deletions
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11
src/util/virfile.c
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@ -2315,6 +2315,7 @@ virFileOpenAs(const char *path, int openflags, mode_t mode,
/* virFileRemoveNeedsSetuid:
* @path: file we plan to remove
* @uid: file uid to check
* @gid: file gid to check
*
@ -2322,7 +2323,7 @@ virFileOpenAs(const char *path, int openflags, mode_t mode,
* owned by the passed uid/gid pair. Needed for NFS with root-squash
*/
static bool
virFileRemoveNeedsSetuid(uid_t uid, gid_t gid)
virFileRemoveNeedsSetuid(const char *path, uid_t uid, gid_t gid)
{
/* If running unprivileged, setuid isn't going to work */
if (geteuid() != 0)
@ -2336,6 +2337,12 @@ virFileRemoveNeedsSetuid(uid_t uid, gid_t gid)
if (uid == geteuid() && gid == getegid())
return false;
/* Only perform the setuid stuff for NFS, which is the only case
that may actually need it. This can error, but just be safe and
only check for a clear negative result. */
if (virFileIsSharedFSType(path, VIR_FILE_SHFS_NFS) == 0)
return false;
return true;
}
@ -2361,7 +2368,7 @@ virFileRemove(const char *path,
gid_t *groups;
int ngroups;
if (!virFileRemoveNeedsSetuid(uid, gid)) {
if (!virFileRemoveNeedsSetuid(path, uid, gid)) {
if (virFileIsDir(path))
return rmdir(path);
else