Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: kTLS, Fix incorrect page refcounting
The kTLS tx handling code is using a mix of get_page() and
page_ref_inc() APIs to increment the page reference. But on the release
path (mlx5e_ktls_tx_handle_resync_dump_comp()), only put_page() is used.
This is an issue when using pages from large folios: the get_page()
references are stored on the folio page while the page_ref_inc()
references are stored directly in the given page. On release the folio
page will be dereferenced too many times.
This was found while doing kTLS testing with sendfile() + ZC when the
served file was read from NFS on a kernel with NFS large folios support
(commit 49b29a573da8 ("nfs: add support for large folios")).
Affected
ProductAffectedFixed inSource
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < a0ddb20a748b122ea86003485f7992fa5e84cc95a0ddb20a748b122ea86003485f7992fa5e84cc95CNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < ffad2ac8c859c1c1a981fe9c4f7ff925db684a43ffad2ac8c859c1c1a981fe9c4f7ff925db684a43CNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < c7b97f9e794d8e2bbaa50e1d6c230196fd214b5ec7b97f9e794d8e2bbaa50e1d6c230196fd214b5eCNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < 69fbd07f17b0fdaf8970bc705f5bf115c297839d69fbd07f17b0fdaf8970bc705f5bf115c297839dCNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < 93a14620b97c911489a5b008782f3d9b0c4aeff493a14620b97c911489a5b008782f3d9b0c4aeff4CNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < 2723e8b2cbd486cb96e5a61b22473f7fd62e18df2723e8b2cbd486cb96e5a61b22473f7fd62e18dfCNA
Linux84d1bb2b139e0184b1754aa1b5776186b475fce8 – < dd6e972cc5890d91d6749bb48e3912721c4e4b25dd6e972cc5890d91d6749bb48e3912721c4e4b25CNA
Linux5.45.4.287CNA
by Kastro