In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dma-buf: Fix silent overflow for phys vec to sgt<\/p>\n
In case MMIO size is bigger than 4G and peer2peer DMA goes
\nthrough host bridge, we trigger a code path that assigns the
\ntotal linked IOVA (which is greater than 4G) to mapped_len.<\/p>\n
Previously, `mapped_len` was declared as 32-bit `unsigned int`.
\nWhen accumulating `size_t` lengths, this leads to a silent wrap-around.
\nThis truncation causes truncated lengths to be passed to functions
\nlike `fill_sg_entry()`.<\/p>\n
Fix this by changing `mapped_len` to `size_t` (64-bit). While
\nat it, fix similar potential overflow issues in `calc_sg_nents`
\nby using `check_add_overflow()` for `nents` and using
\n`unsigned int` for the loop iterator in `fill_sg_entry` to match.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dma-buf: Fix silent overflow for phys vec to sgt<\/p>\n
In case MMIO size is bigger than 4G and peer2peer DMA goes
\nthrough host bridge, w<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33311","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}