From: zhangliguang <zhangliguang@linux.alibaba.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-fsdevel@vger.kernel.org
Subject: [PATCH] fuse: fix a NULL pointer dereference
Date: Mon, 29 Apr 2019 14:13:39 +0800 [thread overview]
Message-ID: <1556518419-17986-1-git-send-email-zhangliguang@linux.alibaba.com> (raw)
In case kzalloc fails, the fix returns NULL to avoid NULL pointer
dereference.
Signed-off-by: zhangliguang <zhangliguang@linux.alibaba.com>
---
fs/fuse/dev.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 9971a35..23e73d8 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -61,6 +61,9 @@ static struct page **fuse_req_pages_alloc(unsigned int npages, gfp_t flags,
pages = kzalloc(npages * (sizeof(struct page *) +
sizeof(struct fuse_page_desc)), flags);
+ if (!pages)
+ return NULL;
+
*desc = (void *) pages + npages * sizeof(struct page *);
return pages;
--
1.8.3.1
reply other threads:[~2019-04-29 6:13 UTC|newest]
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