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SUNRPC: fix a memleak in gss_import_v2_context

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The ctx->mech_used.data allocated by kmemdup is not freed in neither
gss_import_v2_context nor it only caller gss_krb5_import_sec_context,
which frees ctx on error.

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: 47d8480776 ("gss_krb5: handle new context format from gssd")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Zhipeng Lu 2023-12-24 16:20:33 +08:00 committed by Chuck Lever
parent d206a76d7d
commit e67b652d8e
1 changed files with 10 additions and 1 deletions
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11
net/sunrpc/auth_gss/gss_krb5_mech.c
View file

@ -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 +451,16 @@ 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;
}
return 0;
out_free:
kfree(ctx->mech_used.data);
out_err:
return PTR_ERR(p);
}