From 28758a9c788ef63a0aaf46df57bfae0f2110d85c Mon Sep 17 00:00:00 2001 From: Jiasheng Jiang Date: Mon, 8 Sep 2025 14:38:57 -0400 Subject: [PATCH] mtd: Add check for devm_kcalloc() [ Upstream commit 2aee30bb10d7bad0a60255059c9ce1b84cf0130e ] Add a check for devm_kcalloc() to ensure successful allocation. Fixes: 78c08247b9d3 ("mtd: Support kmsg dumper based on pstore/blk") Cc: stable@vger.kernel.org # v5.10+ Signed-off-by: Jiasheng Jiang Signed-off-by: Miquel Raynal [ Adjust context ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/mtdpstore.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/mtdpstore.c b/drivers/mtd/mtdpstore.c index 5594a22c01375..e86b6c9c44d30 100644 --- a/drivers/mtd/mtdpstore.c +++ b/drivers/mtd/mtdpstore.c @@ -423,6 +423,9 @@ static void mtdpstore_notify_add(struct mtd_info *mtd) longcnt = BITS_TO_LONGS(div_u64(mtd->size, mtd->erasesize)); cxt->badmap = devm_kcalloc(&mtd->dev, longcnt, sizeof(long), GFP_KERNEL); + if (!cxt->rmmap || !cxt->usedmap || !cxt->badmap) + return; + cxt->dev.total_size = mtd->size; /* just support dmesg right now */ cxt->dev.flags = PSTORE_FLAGS_DMESG; -- 2.47.3