Re: [PATCH] fs: erofs: xattr.c change kzalloc to kcalloc

From: Gao Xiang
Date: Sun Dec 22 2024 - 22:32:36 EST




On 2024/12/23 11:00, Ethan Carter Edwards wrote:
From 272d7ef4611e64269fada0ea3021eece590118b9 Mon Sep 17 00:00:00 2001
From: Ethan Carter Edwards <ethan@xxxxxxxxxxxxxxxxx>
Date: Sun, 22 Dec 2024 21:23:56 -0500
Subject: [PATCH] fs: erofs: xattr.c change kzalloc to kcalloc

Refactor xattr.c to use kcalloc instead of kzalloc when multiplying
allocation size by count. This refactor prevents unintentional
memory overflows. Discovered by checkpatch.pl.

Signed-off-by: Ethan Carter Edwards <ethan@xxxxxxxxxxxxxxxxx>

Reviewed-by: Gao Xiang <hsiangkao@xxxxxxxxxxxxxxxxx>

Although your raw patch format is incorrect. You shouldn't
send the whole patch as the content, but just use
`git send-email` to send the patch.

I've fixed it up manually, no need to resend.

Thanks,
Gao Xiang

---
fs/erofs/xattr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index a90d7d649739..7940241d9355 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -478,7 +478,7 @@ int erofs_xattr_prefixes_init(struct super_block *sb)
if (!sbi->xattr_prefix_count)
return 0;
- pfs = kzalloc(sbi->xattr_prefix_count * sizeof(*pfs), GFP_KERNEL);
+ pfs = kcalloc(sbi->xattr_prefix_count, sizeof(*pfs), GFP_KERNEL);
if (!pfs)
return -ENOMEM;