In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
accel\/rocket: fix NULL dereference and integer overflow in rocket_job_push()<\/p>\n
rocket_job_push() allocates a temporary array to hold all input and
\noutput GEM object pointers:<\/p>\n
bos = kvmalloc_array(job->in_bo_count + job->out_bo_count,
\n sizeof(void *), GFP_KERNEL);
\n memcpy(bos, job->in_bos, job->in_bo_count * sizeof(void *));
\n memcpy(&bos[job->in_bo_count], job->out_bos, …);<\/p>\n
Two bugs exist:<\/p>\n
1. Missing NULL check: if kvmalloc_array() fails, bos is NULL and
\n the subsequent memcpy() dereferences it, causing a kernel NULL
\n pointer dereference.<\/p>\n
2. Integer overflow: in_bo_count and out_bo_count are both u32, set
\n directly from userspace-supplied in_bo_handle_count and
\n out_bo_handle_count with no prior validation. Their sum is computed
\n in u32 arithmetic and can wrap to a smaller value, causing the
\n allocation count passed to kvmalloc_array() to be smaller than
\n intended. Subsequent uses still operate on the original counts when
\n copying and locking objects, which may lead to out-of-bounds accesses
\n on the temporary array.<\/p>\n
Fix by using check_add_overflow() to detect count overflow before the
\nallocation, and adding a NULL check on the allocation result.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
accel\/rocket: fix NULL dereference and integer overflow in rocket_job_push()<\/p>\n
rocket_job_push() allocates a temporary array to hold<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21514","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21514","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=21514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}