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| author | Andreas Schwab <schwab@suse.de> | 2022-09-19 10:10:09 +0200 |
|---|---|---|
| committer | Andreas Schwab <schwab@suse.de> | 2022-10-10 09:30:26 +0200 |
| commit | c15318bfc5499d835c434a4d98b688aa2d928412 (patch) | |
| tree | 58e935f8fff70d4d1c17cf625edca2203f2b4a43 | |
| parent | 954b8f38958de72c4712088735eb175118f17b51 (diff) | |
| download | glibc-c15318bfc5499d835c434a4d98b688aa2d928412.tar.gz glibc-c15318bfc5499d835c434a4d98b688aa2d928412.tar.xz glibc-c15318bfc5499d835c434a4d98b688aa2d928412.zip | |
socket: Use offsetof in SUN_LEN (bug 29578)
Use offsetof instead of its traditional expansion in the definition of the SUN_LEN macro, to avoid a warning from the undefined behaviour sanitizer.
| -rw-r--r-- | socket/sys/un.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/socket/sys/un.h b/socket/sys/un.h index 454eafebc9..2b11300e28 100644 --- a/socket/sys/un.h +++ b/socket/sys/un.h @@ -34,10 +34,11 @@ struct sockaddr_un #ifdef __USE_MISC +# include <stddef.h> # include <string.h> /* For prototype of `strlen'. */ /* Evaluate to actual length of the `sockaddr_un' structure. */ -# define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \ +# define SUN_LEN(ptr) (offsetof (struct sockaddr_un, sun_path) \ + strlen ((ptr)->sun_path)) #endif |