6.6-stable review patch. If anyone has any objections, please let me know.
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From: David Howells dhowells@redhat.com
[ Upstream commit 5a20b7cb0d8d3ee490a8e088dc2584aa782e3355 ]
Fix the calculation of packet signatures by adding the offset into a page in the read or write data payload when hashing the pages from it.
Fixes: 39bc58203f04 ("cifs: Add a function to Hash the contents of an iterator") Signed-off-by: David Howells dhowells@redhat.com Reviewed-by: Tom Talpey tom@talpey.com Reviewed-by: Paulo Alcantara (Red Hat) pc@manguebit.com cc: Shyam Prasad N nspmangalore@gmail.com cc: Rohith Surabattula rohiths.msft@gmail.com cc: Jeff Layton jlayton@kernel.org cc: linux-cifs@vger.kernel.org cc: linux-fsdevel@vger.kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/client/cifsencrypt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/smb/client/cifsencrypt.c b/fs/smb/client/cifsencrypt.c index 6322f0f68a17..b0473c2567fe 100644 --- a/fs/smb/client/cifsencrypt.c +++ b/fs/smb/client/cifsencrypt.c @@ -129,7 +129,7 @@ static ssize_t cifs_shash_xarray(const struct iov_iter *iter, ssize_t maxsize, for (j = foffset / PAGE_SIZE; j < npages; j++) { len = min_t(size_t, maxsize, PAGE_SIZE - offset); p = kmap_local_page(folio_page(folio, j)); - ret = crypto_shash_update(shash, p, len); + ret = crypto_shash_update(shash, p + offset, len); kunmap_local(p); if (ret < 0) return ret;