linux-ext4 - [PATCH 1/6] e2fsck: set s->len=0 if malloc() fails in alloc

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Date:   Fri, 3 Dec 2021 14:26:16 +0800
From:   zhanchengbin <zhanchengbin1@...wei.com>
To:     Theodore Ts'o <tytso@....edu>
CC:     <linux-ext4@...r.kernel.org>, <liuzhiqiang26@...wei.com>,
        <linfeilong@...wei.com>
Subject: [PATCH 1/6] e2fsck: set s->len=0 if malloc() fails in alloc_string()

In alloc_string(), when malloc fails, len in the
string structure should be 0.

Signed-off-by: zhanchengbin <zhanchengbin1@...wei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@...wei.com>
---
  e2fsck/logfile.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/e2fsck/logfile.c b/e2fsck/logfile.c
index 63e9a12f..f2227ad5 100644
--- a/e2fsck/logfile.c
+++ b/e2fsck/logfile.c
@@ -32,6 +32,8 @@ static void alloc_string(struct string *s, int len)
  {
      s->s = malloc(len);
  /* e2fsck_allocate_memory(ctx, len, "logfile name"); */
+    if (s->s == NULL)
+        s->len = 0;
      s->len = len;
      s->end = 0;
  }
-- 
2.23.0