From 9e2fe574c02bde46307255467a5e4291f65227fe Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20G=C3=B6ttsche?= Date: Tue, 25 Jan 2022 15:14:14 +0100 Subject: [PATCH] selinux: enclose macro arguments in parenthesis MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Enclose the macro arguments in parenthesis to avoid potential evaluation order issues. Note the xperm and ebitmap macros are still not side-effect safe due to double evaluation. Reported by clang-tidy [bugprone-macro-parentheses] Signed-off-by: Christian Göttsche Reviewed-by: Nick Desaulniers Signed-off-by: Paul Moore --- security/selinux/include/security.h | 4 ++-- security/selinux/ss/ebitmap.h | 6 +++--- security/selinux/ss/sidtab.c | 4 ++-- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h index 6482e0e..d91a567 100644 --- a/security/selinux/include/security.h +++ b/security/selinux/include/security.h @@ -254,8 +254,8 @@ struct av_decision { #define XPERMS_AUDITALLOW 2 #define XPERMS_DONTAUDIT 4 -#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f)) -#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f))) +#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x) & 0x1f)) +#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x) & 0x1f))) struct extended_perms_data { u32 p[8]; }; diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h index 9eb2d0a..58eb822 100644 --- a/security/selinux/ss/ebitmap.h +++ b/security/selinux/ss/ebitmap.h @@ -118,9 +118,9 @@ static inline void ebitmap_node_clr_bit(struct ebitmap_node *n, } #define ebitmap_for_each_positive_bit(e, n, bit) \ - for (bit = ebitmap_start_positive(e, &n); \ - bit < ebitmap_length(e); \ - bit = ebitmap_next_positive(e, &n, bit)) \ + for ((bit) = ebitmap_start_positive(e, &(n)); \ + (bit) < ebitmap_length(e); \ + (bit) = ebitmap_next_positive(e, &(n), bit)) \ int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2); int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src); diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c index 293ec04..a54b8652 100644 --- a/security/selinux/ss/sidtab.c +++ b/security/selinux/ss/sidtab.c @@ -27,8 +27,8 @@ struct sidtab_str_cache { char str[]; }; -#define index_to_sid(index) (index + SECINITSID_NUM + 1) -#define sid_to_index(sid) (sid - (SECINITSID_NUM + 1)) +#define index_to_sid(index) ((index) + SECINITSID_NUM + 1) +#define sid_to_index(sid) ((sid) - (SECINITSID_NUM + 1)) int sidtab_init(struct sidtab *s) { -- 2.7.4