diff options
author | Kees Cook <keescook@chromium.org> | 2017-06-21 09:53:06 -0700 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-06-29 20:08:32 -0400 |
commit | cc658db47d6897a8571fb6227f59d1d18151b0b2 (patch) | |
tree | 67d1bd8c5c8f3f7c90a6f24c39832fc0218de07a /fs/inode.c | |
parent | 41124db869b7e00e12052555f8987867ac01d70c (diff) | |
download | op-kernel-dev-cc658db47d6897a8571fb6227f59d1d18151b0b2.zip op-kernel-dev-cc658db47d6897a8571fb6227f59d1d18151b0b2.tar.gz |
fs: Reorder inode_owner_or_capable() to avoid needless
Checking for capabilities should be the last operation when performing
access control tests so that PF_SUPERPRIV is set only when it was required
for success (implying that the capability was needed for the operation).
Reported-by: Solar Designer <solar@openwall.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge@hallyn.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/inode.c')
-rw-r--r-- | fs/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -2023,7 +2023,7 @@ bool inode_owner_or_capable(const struct inode *inode) return true; ns = current_user_ns(); - if (ns_capable(ns, CAP_FOWNER) && kuid_has_mapping(ns, inode->i_uid)) + if (kuid_has_mapping(ns, inode->i_uid) && ns_capable(ns, CAP_FOWNER)) return true; return false; } |