Re: [syzbot] [block?] general protection fault in bio_alloc_bioset
From: Edward Adam Davis
Date: Sat Mar 21 2026 - 03:26:16 EST
#syz test
diff --git a/block/bio.c b/block/bio.c
index 5057047194c4..0a870979bd41 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -582,6 +582,9 @@ struct bio *bio_alloc_bioset(struct block_device *bdev, unsigned short nr_vecs,
opf &= ~REQ_ALLOC_CACHE;
p = mempool_alloc(&bs->bio_pool, gfp);
+ if (unlikely(!p))
+ return NULL;
+
bio = p + bs->front_pad;
if (nr_vecs > BIO_INLINE_VECS) {
nr_vecs = BIO_MAX_VECS;