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From: Edward Adam Davis <eadavis@sina.com>
To: syzbot+b9529ebe6a9394ddf825@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [ecryptfs?] KASAN: slab-out-of-bounds Read in ecryptfs_verify_auth_tok_from_key
Date: Thu, 17 Sep 2026 11:39:24 +0800	[thread overview]
Message-ID: <20260917033925.981926-1-eadavis@sina.com> (raw)
In-Reply-To: <6aaabb70.86093f18.33004f.0003.GAE@google.com>

From: Edward Aadm Davis <eadavis@sina.com>

#syz test: upstream f6e7b42bf05b

diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 51651314b7a6..a52ede408f1c 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -455,6 +455,9 @@ ecryptfs_verify_auth_tok_from_key(struct key *auth_tok_key,
 {
 	int rc = 0;
 
+	if (auth_tok_key->datalen < sizeof(**auth_tok))
+		return -EINVAL;
+
 	(*auth_tok) = ecryptfs_get_key_payload_data(auth_tok_key);
 	if (IS_ERR(*auth_tok)) {
 		rc = PTR_ERR(*auth_tok);

  parent reply	other threads:[~2026-09-17  3:39 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-16 15:53 syzbot
2026-09-17  1:53 ` Edward Adam Davis
2026-09-17  2:10   ` syzbot
2026-09-17  2:22 ` Edward Adam Davis
2026-09-17  2:46   ` syzbot
2026-09-17  2:46 ` Forwarded: " syzbot
2026-09-17  2:54 ` syzbot
2026-09-17  3:04 ` syzbot
2026-09-17  3:15 ` syzbot
2026-09-17  3:36 ` syzbot
2026-09-17  3:39 ` Edward Adam Davis [this message]
2026-09-17  4:15   ` [syzbot] [ecryptfs?] " syzbot
2026-09-17  3:53 ` Forwarded: " syzbot
     [not found] <CAFJkwZxO+=cYaCFSAEejhBgJeiJczxuua1y0+Dcs1Fj5Sg_vaw@mail.gmail.com>
2026-09-17  2:48 ` [syzbot] [ecryptfs?] " syzbot
     [not found] <CAFJkwZw6b0pX7rft72ke0A3d1UauhQR5kh+tWXg9xKT4CDikEg@mail.gmail.com>
2026-09-17  2:56 ` syzbot
     [not found] <CAFJkwZxNQWU=x4gLojE-jhi82Y4hFj=p2wrK6QK2EBCf69r3nQ@mail.gmail.com>
2026-09-17  3:06 ` syzbot
     [not found] <CAFJkwZx1RyUmXg4RNqQPKVCdyu4-N_4G_JhtL7xGihU5RFnnqw@mail.gmail.com>
2026-09-17  3:31 ` syzbot
     [not found] <CAFJkwZzcu4-z0b+nc4Ki0DjaL3=DWfE7mXgfjL0VK6RL8AK36w@mail.gmail.com>
2026-09-17  3:52 ` syzbot
     [not found] <CAFJkwZw8hjL7xSTayRqbVS37RYYENU5XFTgT0b90J05dG3gVXg@mail.gmail.com>
2026-09-17  4:39 ` syzbot

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