Patch kernel: backport ixgbevf UAF fix in VEPA multicast source pruning (torvalds/linux@5d49b568)#17422
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…ng (torvalds/linux@5d49b568) Backport upstream fix. Upstream commit: torvalds/linux@5d49b56 Signed-off-by: omkhar <omkhar@linkedin.com>
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Closing per the OOT policy I committed to on #17414 (comment): I only ask for OOT carry when there is a public PoC achieving LPE/RCE on a stock kernel, or active-in-the-wild signal. This backport is technically sound (verbatim upstream apply, LTP clean, The upstream fix carries Happy to reopen if a public PoC surfaces or if the Mariner / 3.0 kernel team disagrees with the bar. |
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Backport upstream UAF fix from torvalds/linux@5d49b56.
Upstream: Author Michael Bommarito; Reviewed-by Simon Horman; Tested-by Rafal Romanowski; Signed-off-by Tony Nguyen, Jakub Kicinski. Cc: stable@vger.kernel.org.
Backport type: verbatim 1-line change. Patch applies clean on AzureLinux 3.0 (6.6.139.1).
Code-correctness: New instruction
movq $0x0,-0xd0(%rbp)at offset +0x2111 in ixgbevf_poll — literal assembly ofskb = NULL;. ixgbevf.ko .text +16 bytes (alignment).LTP regression: net.ipv6_lib + net.multicast baseline-vs-patched. 0 patch-induced regressions.