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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-06-04 15:21:52 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-06-04 15:21:52 +0200 |
| commit | 978267b6430c07d62cb38f83e058a3132c52eca1 (patch) | |
| tree | 1a744c8230cd5a72adc363ca93458a748c664abe /fs/overlayfs/inode.c | |
| parent | 6bc51cbaa9d75c7c240282da5ff270815caccac0 (diff) | |
| parent | ff86bf0c65f14346bf2440534f9ba5ac232c39a0 (diff) | |
Merge branch 'timers/urgent' into WIP.timers
Pick up urgent fixes to avoid conflicts.
Diffstat (limited to 'fs/overlayfs/inode.c')
| -rw-r--r-- | fs/overlayfs/inode.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index ad9547f82da5..d613e2c41242 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -240,6 +240,16 @@ int ovl_xattr_get(struct dentry *dentry, const char *name, return res; } +static bool ovl_can_list(const char *s) +{ + /* List all non-trusted xatts */ + if (strncmp(s, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) != 0) + return true; + + /* Never list trusted.overlay, list other trusted for superuser only */ + return !ovl_is_private_xattr(s) && capable(CAP_SYS_ADMIN); +} + ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size) { struct dentry *realdentry = ovl_dentry_real(dentry); @@ -263,7 +273,7 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size) return -EIO; len -= slen; - if (ovl_is_private_xattr(s)) { + if (!ovl_can_list(s)) { res -= slen; memmove(s, s + slen, len); } else { |