gcc version: gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
I use this version of gcc to compile, and the compilation fails. It said
that "error: writing 1 byte into a region of size 0
[-Werror=stringop-overflow=]".
This patch is to fix it to build successfully.
Fixes: 89741e7e42f6 ("Makefile: Enable -Wstringop-overflow globally")
Signed-off-by: Wenyu Huang <huangwenyu5@xxxxxxxxxx>
---
lib/vsprintf.c | 4 ++++
mm/mempolicy.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 3e3733a7084f..7a247cfecd61 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -2887,12 +2887,14 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
}
out:
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+#pragma GCC diagnostic pop
/* the trailing null byte doesn't count towards the total */
return str-buf;
@@ -3385,12 +3387,14 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
} /* while(*fmt) */
out:
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+#pragma GCC diagnostic pop
#undef get_arg
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 10a590ee1c89..6c8433228c71 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -3000,6 +3000,7 @@ int mpol_parse_str(char *str, struct mempolicy **mpol)
err = 0;
out:
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
/* Restore string for error message */
if (nodelist)
*--nodelist = ':';
@@ -3008,6 +3009,7 @@ int mpol_parse_str(char *str, struct mempolicy **mpol)
if (!err)
*mpol = new;
return err;
+#pragma GCC diagnostic pop
}
#endif /* CONFIG_TMPFS */
--
2.34.1
