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fuse-overlayfs: do not allow to overwrite user.fuseoverlayfs xattrs

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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2018-07-13 12:42:49 +02:00
parent 6e7b5d70fd
commit 358873e18b
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GPG Key ID: E4730F97F60286ED
1 changed files with 7 additions and 0 deletions
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7
main.c
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@ -60,6 +60,7 @@
#define ATTR_TIMEOUT 1000000000.0
#define ENTRY_TIMEOUT 1000000000.0
#define XATTR_PREFIX "user.fuseoverlayfs"
#define REDIRECT_XATTR "user.fuseoverlayfs.redirect"
#define NODE_TO_INODE(x) ((fuse_ino_t) x)
@ -1897,6 +1898,12 @@ ovl_setxattr (fuse_req_t req, fuse_ino_t ino, const char *name,
fprintf (stderr, "ovl_setxattr(ino=%" PRIu64 "s, name=%s, value=%s, size=%zu, flags=%d)\n", ino, name,
value, size, flags);
if (has_prefix (name, XATTR_PREFIX))
{
fuse_reply_err (req, EPERM);
return;
}
node = do_lookup_file (lo, ino, NULL);
if (node == NULL)
{