概要

In the Linux kernel, the following vulnerability has been resolved: net/tls: Fix flipped sign in tls_err_abort() calls sk-&gt;sk_err appears to expect a positive value, a convention that ktls doesn't always follow and that leads to memory corruption in other code. For instance, [kworker] tls_encrypt_done(..., err=<negative error from crypto request&gt;) tls_err_abort(.., err) sk-&gt;sk_err = err; [task] splice_from_pipe_feed ... tls_sw_do_sendpage if (sk-&gt;sk_err) { ret = -sk-&gt;sk_err; // ret is positive splice_from_pipe_feed (continued) ret = actor(...) // ret is still positive and interpreted as bytes // written, resulting in underflow of buf-&gt;len and // sd-&gt;len, leading to huge buf-&gt;offset and bogus // addresses computed in later calls to actor() Fix all tls_err_abort() callers to pass a negative error code consistently and centralize the error-prone sign flip there, throwing in a warning to catch future misuse and uninlining the function so it really does only warn once.

CVSS v3 指标

安全公告

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