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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-09-19 10:50:33 +0200 |
|---|---|---|
| committer | Anna Schumaker <anna.schumaker@oracle.com> | 2024-10-03 22:19:13 +0200 |
| commit | 6dbf1f341b6b35bcc20ff95b6b315e509f6c5369 (patch) | |
| tree | e68700cb37b3d3c05dfa1ea5eba6f37ef15d9b71 /fs | |
| parent | sunrpc: fix prog selection loop in svc_process_common (diff) | |
| download | linux-6dbf1f341b6b35bcc20ff95b6b315e509f6c5369.tar.xz linux-6dbf1f341b6b35bcc20ff95b6b315e509f6c5369.zip | |
SUNRPC: Fix integer overflow in decode_rc_list()
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>
Diffstat (limited to 'fs')
| -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 6df77f008d3f..fdeb0b34a3d3 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -375,6 +375,8 @@ 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)) |