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Message-Id: <20220418121211.356029123@linuxfoundation.org>
Date: Mon, 18 Apr 2022 14:10:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
Chuck Lever <chuck.lever@...cle.com>
Subject: [PATCH 4.14 023/284] NFSD: prevent underflow in nfssvc_decode_writeargs()
From: Dan Carpenter <dan.carpenter@...cle.com>
commit 184416d4b98509fb4c3d8fc3d6dc1437896cc159 upstream.
Smatch complains:
fs/nfsd/nfsxdr.c:341 nfssvc_decode_writeargs()
warn: no lower bound on 'args->len'
Change the type to unsigned to prevent this issue.
Cc: stable@...r.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/nfsd/nfsproc.c | 2 +-
fs/nfsd/xdr.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -227,7 +227,7 @@ nfsd_proc_write(struct svc_rqst *rqstp)
__be32 nfserr;
unsigned long cnt = argp->len;
- dprintk("nfsd: WRITE %s %d bytes at %d\n",
+ dprintk("nfsd: WRITE %s %u bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->len, argp->offset);
--- a/fs/nfsd/xdr.h
+++ b/fs/nfsd/xdr.h
@@ -33,7 +33,7 @@ struct nfsd_readargs {
struct nfsd_writeargs {
svc_fh fh;
__u32 offset;
- int len;
+ __u32 len;
int vlen;
};
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