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nfsd: Fix a memory leak in an error handling path

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If this memdup_user() call fails, the memory allocated in a previous call
a few lines above should be freed. Otherwise it leaks.

Fixes: 6ee95d1c89 ("nfsd: add support for upcall version 2")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Christophe JAILLET 2022-09-01 07:27:04 +02:00 committed by Chuck Lever
parent 4ab3442ca3
commit fd1ef88049
1 changed files with 3 additions and 1 deletions
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4
fs/nfsd/nfs4recover.c
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@ -815,8 +815,10 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
princhash.data = memdup_user(
&ci->cc_princhash.cp_data,
princhashlen);
if (IS_ERR_OR_NULL(princhash.data))
if (IS_ERR_OR_NULL(princhash.data)) {
kfree(name.data);
return -EFAULT;
}
princhash.len = princhashlen;
} else
princhash.len = 0;