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Message-Id: <20231224082035.3538560-1-alexious@zju.edu.cn>
Date: Sun, 24 Dec 2023 16:20:33 +0800
From: Zhipeng Lu <alexious@....edu.cn>
To: alexious@....edu.cn
Cc: Trond Myklebust <trond.myklebust@...merspace.com>,
Anna Schumaker <anna@...nel.org>,
Chuck Lever <chuck.lever@...cle.com>,
Jeff Layton <jlayton@...nel.org>,
Neil Brown <neilb@...e.de>,
Olga Kornievskaia <kolga@...app.com>,
Dai Ngo <Dai.Ngo@...cle.com>,
Tom Talpey <tom@...pey.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Simo Sorce <simo@...hat.com>,
Steve Dickson <steved@...hat.com>,
Kevin Coffman <kwc@...i.umich.edu>,
linux-nfs@...r.kernel.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] SUNRPC: fix a memleak in gss_import_v2_context
The ctx->mech_used.data allocated by kmemdup is not freed in neither
gss_import_v2_context nor it only caller radeon_driver_open_kms.
Thus, this patch reform the last call of gss_import_v2_context to the
gss_krb5_import_ctx_v2, preventing the memleak while keepping the return
formation.
Fixes: 47d848077629 ("gss_krb5: handle new context format from gssd")
Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
---
net/sunrpc/auth_gss/gss_krb5_mech.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
index e31cfdf7eadc..1e54bd63e3f0 100644
--- a/net/sunrpc/auth_gss/gss_krb5_mech.c
+++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
@@ -398,6 +398,7 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
u64 seq_send64;
int keylen;
u32 time32;
+ int ret;
p = simple_get_bytes(p, end, &ctx->flags, sizeof(ctx->flags));
if (IS_ERR(p))
@@ -450,8 +451,14 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
}
ctx->mech_used.len = gss_kerberos_mech.gm_oid.len;
- return gss_krb5_import_ctx_v2(ctx, gfp_mask);
+ ret = gss_krb5_import_ctx_v2(ctx, gfp_mask);
+ if (ret) {
+ p = ERR_PTR(ret);
+ goto out_free;
+ };
+out_free:
+ kfree(ctx->mech_used.data);
out_err:
return PTR_ERR(p);
}
--
2.34.1
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