linux-kernel - [PATCH 4.4 14/60] scripts: modpost: check memory allocation results

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Date:   Thu, 13 Sep 2018 15:30:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Yuexing Wang <wangyxlandq@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.4 14/60] scripts: modpost: check memory allocation results

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit 1f3aa9002dc6a0d59a4b599b4fc8f01cf43ef014 ]

Fix missing error check for memory allocation functions in
scripts/mod/modpost.c.

Fixes kernel bugzilla #200319:
https://bugzilla.kernel.org/show_bug.cgi?id=200319

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Yuexing Wang <wangyxlandq@...il.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 scripts/mod/modpost.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -649,7 +649,7 @@ static void handle_modversions(struct mo
 			if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER)
 				break;
 			if (symname[0] == '.') {
-				char *munged = strdup(symname);
+				char *munged = NOFAIL(strdup(symname));
 				munged[0] = '_';
 				munged[1] = toupper(munged[1]);
 				symname = munged;
@@ -1311,7 +1311,7 @@ static Elf_Sym *find_elf_symbol2(struct
 static char *sec2annotation(const char *s)
 {
 	if (match(s, init_exit_sections)) {
-		char *p = malloc(20);
+		char *p = NOFAIL(malloc(20));
 		char *r = p;
 
 		*p++ = '_';
@@ -1331,7 +1331,7 @@ static char *sec2annotation(const char *
 			strcat(p, " ");
 		return r;
 	} else {
-		return strdup("");
+		return NOFAIL(strdup(""));
 	}
 }
 
@@ -2032,7 +2032,7 @@ void buf_write(struct buffer *buf, const
 {
 	if (buf->size - buf->pos < len) {
 		buf->size += len + SZ;
-		buf->p = realloc(buf->p, buf->size);
+		buf->p = NOFAIL(realloc(buf->p, buf->size));
 	}
 	strncpy(buf->p + buf->pos, s, len);
 	buf->pos += len;