From: Dominique Martinet <asmadeus@codewreck.org>
To: v9fs-developer@lists.sourceforge.net
Cc: Leon Romanovsky <leon@kernel.org>,
linux_oss@crudebyte.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com,
Dominique Martinet <asmadeus@codewreck.org>
Subject: [PATCH 2/2] 9p: client_create: init fcall_cache earlier
Date: Thu, 29 Sep 2022 06:44:17 +0900 [thread overview]
Message-ID: <20220928214417.1749609-2-asmadeus@codewreck.org> (raw)
In-Reply-To: <20220928214417.1749609-1-asmadeus@codewreck.org>
fcall cache was init'd last for some reason, but we actually allocate
some requests for the version check before that.
Moving the cache creation towards the start also makes p9_client_destroy's
order match the allocation order, which might be easier to think about
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
---
net/9p/client.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/net/9p/client.c b/net/9p/client.c
index 40b59431a566..1ea326e6e271 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -977,6 +977,17 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
if (err < 0)
goto out;
+ /* P9_HDRSZ + 4 is the smallest packet header we can have that is
+ * followed by data accessed from userspace by read
+ * Note we do not check for failure here because the cache is
+ * optional; warning will be issued on dmesg for failure.
+ */
+ clnt->fcall_cache =
+ kmem_cache_create_usercopy("9p-fcall-cache", clnt->msize,
+ 0, 0, P9_HDRSZ + 4,
+ clnt->msize - (P9_HDRSZ + 4),
+ NULL);
+
if (!clnt->trans_mod)
clnt->trans_mod = v9fs_get_default_trans();
@@ -1016,15 +1027,6 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
if (err)
goto out;
- /* P9_HDRSZ + 4 is the smallest packet header we can have that is
- * followed by data accessed from userspace by read
- */
- clnt->fcall_cache =
- kmem_cache_create_usercopy("9p-fcall-cache", clnt->msize,
- 0, 0, P9_HDRSZ + 4,
- clnt->msize - (P9_HDRSZ + 4),
- NULL);
-
return clnt;
out:
--
2.35.1
next prev parent reply other threads:[~2022-09-28 21:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-25 11:29 [syzbot] KASAN: use-after-free Read in rdma_close syzbot
2022-09-28 10:07 ` Leon Romanovsky
2022-09-28 10:43 ` asmadeus
2022-09-28 10:49 ` Leon Romanovsky
2022-09-28 11:23 ` asmadeus
2022-09-28 11:54 ` Leon Romanovsky
2022-09-28 12:57 ` Christian Schoenebeck
2022-09-28 21:52 ` asmadeus
2022-09-29 6:10 ` Leon Romanovsky
2022-09-28 21:44 ` [PATCH 1/2] 9p: client_create/destroy: only call trans_mod->close after create Dominique Martinet
2022-09-28 21:44 ` Dominique Martinet [this message]
2022-09-29 5:57 ` [PATCH 2/2] 9p: client_create: init fcall_cache earlier Leon Romanovsky
2022-09-29 7:03 ` Dominique Martinet
2022-09-28 21:58 ` [PATCH 1/2 v2] 9p: client_create/destroy: only call trans_mod->close after create Dominique Martinet
2022-09-28 22:19 ` [PATCH v3] " Dominique Martinet
2022-09-29 5:54 ` Leon Romanovsky
2022-09-29 7:24 ` Dominique Martinet
2022-12-30 10:34 ` [syzbot] KASAN: use-after-free Read in rdma_close syzbot
2023-01-13 10:35 ` syzbot
2023-01-27 10:36 ` syzbot
2023-02-10 10:36 ` syzbot
2023-02-24 10:37 ` syzbot
2023-03-10 10:38 ` syzbot
2023-03-24 10:38 ` syzbot
2023-04-07 10:38 ` syzbot
2023-04-21 10:39 ` syzbot
2023-05-05 10:40 ` syzbot
2023-05-19 10:40 ` syzbot
2023-06-02 10:42 ` syzbot
2023-06-02 10:57 ` Aleksandr Nogikh
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