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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-09-19 11:50:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-17 16:08:33 +0300 |
| commit | 64f1b4922b6e042473e4980a06a2d908bdb6943f (patch) | |
| tree | 1eb74c0cc4084c17ac384ad52cd24b0885c79044 | |
| parent | 1fc13f6a41665217480b977f31cdddc47646a3c5 (diff) | |
| download | linux-64f1b4922b6e042473e4980a06a2d908bdb6943f.tar.xz | |
SUNRPC: Fix integer overflow in decode_rc_list()
[ Upstream commit 6dbf1f341b6b35bcc20ff95b6b315e509f6c5369 ]
The math in "rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)" could have an
integer overflow. Add bounds checking on rc_list->rcl_nrefcalls to fix
that.
Fixes: 4aece6a19cf7 ("nfs41: cb_sequence xdr implementation")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/nfs/callback_xdr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index db69fc267c9a..c8f5a0555ad2 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -372,6 +372,8 @@ static __be32 decode_rc_list(struct xdr_stream *xdr, rc_list->rcl_nrefcalls = ntohl(*p++); if (rc_list->rcl_nrefcalls) { + if (unlikely(rc_list->rcl_nrefcalls > xdr->buf->len)) + goto out; p = xdr_inline_decode(xdr, rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); if (unlikely(p == NULL)) |