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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-02-08 13:18:46 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-02-11 19:07:08 -0600 |
| commit | cffe487026be13eaf37ea28b783d9638ab147204 (patch) | |
| tree | 27bc2db68a43e966b53061831d3bfe633654fa70 /fs | |
| parent | 841c35169323cd833294798e58b9bf63fa4fa1de (diff) | |
| download | linux-stable-cffe487026be13eaf37ea28b783d9638ab147204.tar.gz linux-stable-cffe487026be13eaf37ea28b783d9638ab147204.tar.bz2 linux-stable-cffe487026be13eaf37ea28b783d9638ab147204.zip | |
cifs: fix underflow in parse_server_interfaces()
In this loop, we step through the buffer and after each item we check
if the size_left is greater than the minimum size we need. However,
the problem is that "bytes_left" is type ssize_t while sizeof() is type
size_t. That means that because of type promotion, the comparison is
done as an unsigned and if we have negative bytes left the loop
continues instead of ending.
Fixes: fe856be475f7 ("CIFS: parse and store info on iface queries")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/smb/client/smb2ops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 83c898afc835..755f1c66b573 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -619,7 +619,7 @@ parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, goto out; } - while (bytes_left >= sizeof(*p)) { + while (bytes_left >= (ssize_t)sizeof(*p)) { memset(&tmp_iface, 0, sizeof(tmp_iface)); tmp_iface.speed = le64_to_cpu(p->LinkSpeed); tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; |