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| author | Thomas Weißschuh <linux@weissschuh.net> | 2026-04-01 18:07:27 +0300 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2026-04-04 11:48:14 +0300 |
| commit | fd2e9f820005d63769a6662c276b1f52a72ed041 (patch) | |
| tree | ef797258355c1b2ae85820e88c544203eba7b68e /tools | |
| parent | 867fb336a65ac59260674382168d2d93896ffa8d (diff) | |
| download | linux-fd2e9f820005d63769a6662c276b1f52a72ed041.tar.xz | |
tools/nolibc: use __builtin_offsetof()
The current custom implementation of offsetof() fails UBSAN:
runtime error: member access within null pointer of type 'struct ...'
This means that all its users, including container_of(), free() and
realloc(), fail.
Use __builtin_offsetof() instead which does not have this issue and
has been available since GCC 4 and clang 3.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260401-nolibc-asprintf-v1-1-46292313439f@weissschuh.net
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/nolibc/stddef.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/include/nolibc/stddef.h b/tools/include/nolibc/stddef.h index ecbd13eab1f5..a3976341afdd 100644 --- a/tools/include/nolibc/stddef.h +++ b/tools/include/nolibc/stddef.h @@ -18,7 +18,7 @@ #endif #ifndef offsetof -#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD) +#define offsetof(TYPE, FIELD) __builtin_offsetof(TYPE, FIELD) #endif #endif /* _NOLIBC_STDDEF_H */ |