[PATCH 1/6] get_super_prefix(): copy getenv() result
From: Jeff King <hidden>
Date: 2019-01-11 22:15:03
Subsystem:
the rest · Maintainer:
Linus Torvalds
The return value of getenv() is not guaranteed to remain valid across multiple calls (nor across calls to setenv()). Since this function caches the result for the length of the program, we must make a copy to ensure that it is still valid when we need it. Reported-by: Yngve N. Pettersen <redacted> Signed-off-by: Jeff King <redacted> --- environment.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/environment.c b/environment.c
index 0e37741d83..89af47cb85 100644
--- a/environment.c
+++ b/environment.c@@ -107,7 +107,7 @@ char *git_work_tree_cfg; static char *git_namespace; -static const char *super_prefix; +static char *super_prefix; /* * Repository-local GIT_* environment variables; see cache.h for details.
@@ -240,7 +240,7 @@ const char *get_super_prefix(void) { static int initialized; if (!initialized) { - super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT); + super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT)); initialized = 1; } return super_prefix;
--
2.20.1.651.g2d41a78c67