linux-kernel - [PATCH] btrfs: volumes: Increase bioc pointer check

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Message-Id: <20221025082835.3751-1-zeming@nfschina.com>
Date:   Tue, 25 Oct 2022 16:28:35 +0800
From:   Li zeming <zeming@...china.com>
To:     clm@...com, josef@...icpanda.com, dsterba@...e.com
Cc:     linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Li zeming <zeming@...china.com>
Subject: [PATCH] btrfs: volumes: Increase bioc pointer check

If kzalloc fails to allocate the bioc pointer, NULL is returned
directly.

Signed-off-by: Li zeming <zeming@...china.com>
---
 fs/btrfs/volumes.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 064ab2a79c80..f9cb815fe23d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5892,6 +5892,8 @@ static struct btrfs_io_context *alloc_btrfs_io_context(struct btrfs_fs_info *fs_
 		 */
 		sizeof(u64) * (total_stripes),
 		GFP_NOFS|__GFP_NOFAIL);
+	if (!bioc)
+		return NULL;
 
 	atomic_set(&bioc->error, 0);
 	refcount_set(&bioc->refs, 1);
-- 
2.18.2