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Message-ID: <2024102107-CVE-2024-47734-ad75@gregkh> Date: Mon, 21 Oct 2024 14:16:13 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-47734: bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave() Description =========== In the Linux kernel, the following vulnerability has been resolved: bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave() syzbot reported a WARNING in bond_xdp_get_xmit_slave. To reproduce this[1], one bond device (bond1) has xdpdrv, which increases bpf_master_redirect_enabled_key. Another bond device (bond0) which is unsupported by XDP but its slave (veth3) has xdpgeneric that returns XDP_TX. This triggers WARN_ON_ONCE() from the xdp_master_redirect(). To reduce unnecessary warnings and improve log management, we need to delete the WARN_ON_ONCE() and add ratelimit to the netdev_err(). [1] Steps to reproduce: # Needs tx_xdp with return XDP_TX; ip l add veth0 type veth peer veth1 ip l add veth3 type veth peer veth4 ip l add bond0 type bond mode 6 # BOND_MODE_ALB, unsupported by XDP ip l add bond1 type bond # BOND_MODE_ROUNDROBIN by default ip l set veth0 master bond1 ip l set bond1 up # Increases bpf_master_redirect_enabled_key ip l set dev bond1 xdpdrv object tx_xdp.o section xdp_tx ip l set veth3 master bond0 ip l set bond0 up ip l set veth4 up # Triggers WARN_ON_ONCE() from the xdp_master_redirect() ip l set veth3 xdpgeneric object tx_xdp.o section xdp_tx The Linux kernel CVE team has assigned CVE-2024-47734 to this issue. Affected and fixed versions =========================== Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 5.15.168 with commit c1be35e774f8 Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 6.1.113 with commit 6b64197b4bf1 Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 6.6.54 with commit ccd3e6ff05e5 Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 6.10.13 with commit 72e2c0825a48 Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 6.11.2 with commit 57b5fba55c6f Issue introduced in 5.15 with commit 9e2ee5c7e7c3 and fixed in 6.12-rc1 with commit 0cbfd45fbcf0 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-2024-47734 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/bonding/bond_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/c1be35e774f8ed415e01209fddd963c5a74e8e9f https://git.kernel.org/stable/c/6b64197b4bf1a5703a8b105367baf20f1e627a75 https://git.kernel.org/stable/c/ccd3e6ff05e5236d1b9535f23f3e6622e0bb32b8 https://git.kernel.org/stable/c/72e2c0825a480e19ee999cee9d018850d38c82b9 https://git.kernel.org/stable/c/57b5fba55c6f8b1d83312a34bd656166fcd95658 https://git.kernel.org/stable/c/0cbfd45fbcf0cb26d85c981b91c62fe73cdee01c
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