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([14.48.8.61]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3613fae178fsm5385338a91.7.2026.04.21.09.24.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 09:24:31 -0700 (PDT) From: Jeongjun Park To: syzbot+60cfa08822470bbebe44@syzkaller.appspotmail.com Cc: syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org Subject: Re: [syzbot] [net?] [nfs?] KASAN: slab-out-of-bounds Read in cache_seq_start_rcu Date: Wed, 22 Apr 2026 01:24:29 +0900 Message-Id: <20260421162429.164515-1-aha310510@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <69e798fe.050a0220.24bfd3.0031.GAE@google.com> References: <69e798fe.050a0220.24bfd3.0031.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test upstream master --- net/sunrpc/cache.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 7081c1214e6c..8cb14838c654 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -1357,6 +1357,9 @@ static void *__cache_seq_start(struct seq_file *m, loff_t *pos) hlist_first_rcu(&cd->hash_table[hash])), struct cache_head, cache_list); + if (hash >= cd->hash_size) + return NULL; + *pos = ((long long)hash << 32) + 1; return ch; } --