linux-kernel - Re: [syzbot] [net?] KMSAN: uninit-value in hsr_get

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Message-Id: <20240419130312.11392-1-aha310510@gmail.com>
Date: Fri, 19 Apr 2024 22:03:12 +0900
From: Jeongjun Park <aha310510@...il.com>
To: syzbot+a81f2759d022496b40ab@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] KMSAN: uninit-value in hsr_get_node (3)


please test uninit-value in hsr_get_node

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
 net/core/sock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 0963689a5950..847233e8f3e6 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2920,7 +2920,7 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t gfp)
 		/* Avoid direct reclaim but allow kswapd to wake */
 		pfrag->page = alloc_pages((gfp & ~__GFP_DIRECT_RECLAIM) |
 					  __GFP_COMP | __GFP_NOWARN |
-					  __GFP_NORETRY,
+					  __GFP_NORETRY | __GFP_ZERO,
 					  SKB_FRAG_PAGE_ORDER);
 		if (likely(pfrag->page)) {
 			pfrag->size = PAGE_SIZE << SKB_FRAG_PAGE_ORDER;
-- 
2.34.1