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Message-ID: <2024091110-CVE-2024-45030-c2eb@gregkh> Date: Wed, 11 Sep 2024 17:14:26 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-45030: igb: cope with large MAX_SKB_FRAGS Description =========== In the Linux kernel, the following vulnerability has been resolved: igb: cope with large MAX_SKB_FRAGS Sabrina reports that the igb driver does not cope well with large MAX_SKB_FRAG values: setting MAX_SKB_FRAG to 45 causes payload corruption on TX. An easy reproducer is to run ssh to connect to the machine. With MAX_SKB_FRAGS=17 it works, with MAX_SKB_FRAGS=45 it fails. This has been reported originally in https://bugzilla.redhat.com/show_bug.cgi?id=2265320 The root cause of the issue is that the driver does not take into account properly the (possibly large) shared info size when selecting the ring layout, and will try to fit two packets inside the same 4K page even when the 1st fraglist will trump over the 2nd head. Address the issue by checking if 2K buffers are insufficient. The Linux kernel CVE team has assigned CVE-2024-45030 to this issue. Affected and fixed versions =========================== Issue introduced in 6.4 with commit 3948b05950fd and fixed in 6.6.48 with commit 8ea80ff5d829 Issue introduced in 6.4 with commit 3948b05950fd and fixed in 6.10.7 with commit b52bd8bcb9e8 Issue introduced in 6.4 with commit 3948b05950fd and fixed in 6.11-rc5 with commit 8aba27c4a502 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-45030 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/net/ethernet/intel/igb/igb_main.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/8ea80ff5d8298356d28077bc30913ed37df65109 https://git.kernel.org/stable/c/b52bd8bcb9e8ff250c79b44f9af8b15cae8911ab https://git.kernel.org/stable/c/8aba27c4a5020abdf60149239198297f88338a8d
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