From: lumingyindetect@163.com
To: linux-kernel@vger.kernel.org
Cc: peterz@infradead.org
Subject: Re:[PATCH] tools:Fix a memory leak bug related to the cmd
Date: Sun, 24 Mar 2024 13:56:06 +0800 (CST) [thread overview]
Message-ID: <17ddf389.9f7.18e6f07cfff.Coremail.lumingyindetect@163.com> (raw)
In-Reply-To: <20240323065550.603005-1-lumingyindetect@163.com>
Thank you for your prompt response! It is indeed a wise decision not to release dynamic memory when the tool runs briefly and encounters errors. However, I also noticed in the disas_funcs function in the /linux/tools/objtool/check.c file (line 4617) that a variable named cmd pointing to a dynamic memory area is not being freed (regardless of whether an error occurs). In this case, would it be necessary to add a free(cmd)?
在 2024-03-23 14:55:50,LuMingYin <lumingyindetect@163.com> 写道:
In the function 'disas_funcs' defined in the file /linux/tools/objtool/check.c, a pointer variable named 'cmd' is declared (line 4583 of the file). This pointer variable allocates a block of dynamic memory using the 'malloc' function at line 4615. However, after using the memory area pointed to by 'cmd' (line 4619), it is not deallocated, resulting in a memory leak bug. This commit fixes the bug.
Signed-off-by: LuMingYin <lumingyindetect@163.com>
---
tools/objtool/check.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index eb7e12ebc1d0..486a2a6374f5 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4617,6 +4617,7 @@ static int disas_funcs(const char *funcs)
/* real snprintf() */
snprintf(cmd, size, objdump_str, cross_compile, objname, funcs);
ret = system(cmd);
+ free(cmd);
if (ret) {
WARN("disassembly failed: %d", ret);
return -1;
--
2.25.1
prev parent reply other threads:[~2024-03-24 5:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-23 6:55 [PATCH] tools:Fix a memory leak bug related to the cmd LuMingYin
2024-03-24 5:56 ` lumingyindetect [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=17ddf389.9f7.18e6f07cfff.Coremail.lumingyindetect@163.com \
--to=lumingyindetect@163.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.