In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_mirred: use the backlog for mirred ingress
The test Davide added in commit ca22da2fbd69 ("act_mirred: use the backlog for nested calls to mirred ingress") hangs our testing VMs every 10 or so runs, with the familiar tcp_v4_rcv -> tcp_v4_rcv deadlock reported by lockdep.
The problem as previously described by Davide (see Link) is that if we reverse flow of traffic with the redirect (egress -> ingress) we may reach the same socket which generated the packet. And we may still be holding its socket lock. The common solution to such deadlocks is to put the packet in the Rx backlog, rather than run the Rx path inline. Do that for all egress -> ingress reversals, not just once we started to nest mirred calls.
In the past there was a concern that the backlog indirection will lead to loss of error reporting / less accurate stats. But the current workaround does not seem to address the issue.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-headersUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-cross-headersUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-tools-libs-develUpgrade kernel-rt-debug-coreUpgrade kernel-debugUpgrade kernel-debug-develUpgrade kernel-rt-debug-kvmUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-tools-libsUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-zfcpdump-develUpgrade kernel-debug-coreUpgrade kernel-rt-debugUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-docUpgrade kernel-rt-develUpgrade perfUpgrade kernel-develUpgrade kernel-rt-coreUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdumpUpgrade kernel-rt-modulesUpgrade bpftoolUpgrade kernel-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rtUpgrade kernel-modules-extraUpgrade kernel-modulesUpgrade kernel-rt-kvm | Aug 12, 2024 | Apr 3, 2024 |
| Debian | — | No solution existsUpgrade linux | May 15, 2025 | Apr 3, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernelUpgrade python3-perf | Jul 16, 2024 | Apr 3, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Jun 26, 2024 | Apr 3, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Oct 8, 2024 | Apr 3, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernelUpgrade kernel-headersUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel-develUpgrade python3-perfUpgrade bpftoolUpgrade python-perfUpgrade perf | Jul 23, 2024 | Apr 3, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-tools | Jul 17, 2024 | Apr 3, 2024 |
| Oracle_linux | — | Upgrade kernel | Aug 16, 2024 | Apr 3, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Aug 12, 2024 | Apr 3, 2024 |
| Rocky_linux | — | Upgrade kernel-rtUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-debug-coreUpgrade kernel-rt-debug-develUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-modules-extraUpgrade kernel-tools-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-modulesUpgrade kernel-debug-debuginfoUpgrade kernel-debug-modules-extraUpgrade kernel-rt-debugUpgrade kernel-tools-libsUpgrade kernel-rt-debug-kvmUpgrade bpftoolUpgrade kernel-rt-develUpgrade kernel-rt-kvmUpgrade kernel-rt-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade kernel-modules-extraUpgrade kernel-rt-debug-debuginfoUpgrade kernel-coreUpgrade kernel-debuginfo-common-x86_64Upgrade python3-perf-debuginfoUpgrade kernel-toolsUpgrade kernel-rt-debug-modulesUpgrade kernel-debugUpgrade kernel-develUpgrade kernelUpgrade python3-perfUpgrade kernel-cross-headersUpgrade perfUpgrade kernel-rt-coreUpgrade kernel-debuginfoUpgrade kernel-debug-develUpgrade kernel-tools-libs-develUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-rt-modules-extra | Aug 22, 2024 | Apr 3, 2024 |
| Suse | — | Upgrade kernel-azure-extraUpgrade gfs2-kmp-rtUpgrade kernel-debug-develUpgrade kernel-syms-rtUpgrade dtb-armUpgrade kernel-rt-livepatch-develUpgrade kernel-64kbUpgrade kernel-default-extraUpgrade dtb-amdUpgrade kernel-debugUpgrade kernel-rt_debugUpgrade kernel-debug-livepatch-develUpgrade reiserfs-kmp-defaultUpgrade gfs2-kmp-64kbUpgrade kernel-develUpgrade kernel-zfcpdumpUpgrade kernel-64kb-develUpgrade kernel-default-vdsoUpgrade kernel-devel-rtUpgrade kernel-macrosUpgrade kernel-source-azureUpgrade kernel-64kb-livepatch-develUpgrade kernel-64kb-optionalUpgrade dtb-mediatekUpgrade kernel-azure-livepatch-develUpgrade cluster-md-kmp-azureUpgrade dtb-freescaleUpgrade dtb-hisiliconUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmallUpgrade kernel-obs-qaUpgrade ocfs2-kmp-rtUpgrade dtb-broadcomUpgrade kernel-devel-azureUpgrade dtb-amlogicUpgrade dtb-appleUpgrade kernel-kvmsmall-develUpgrade dtb-marvellUpgrade kernel-default-develUpgrade kernel-default-livepatchUpgrade dtb-lgUpgrade kernel-symsUpgrade dlm-kmp-azureUpgrade dtb-amazonUpgrade dtb-apmUpgrade kernel-syms-azureUpgrade kernel-rt_debug-vdsoUpgrade kernel-sourceUpgrade kernel-default-optionalUpgrade kernel-rt-develUpgrade cluster-md-kmp-defaultUpgrade dtb-exynosUpgrade kselftests-kmp-64kbUpgrade dtb-xilinxUpgrade kernel-azure-vdsoUpgrade kselftests-kmp-defaultUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-rt-vdsoUpgrade kernel-default-baseUpgrade dlm-kmp-rtUpgrade kernel-docsUpgrade dtb-renesasUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade dtb-alteraUpgrade kselftests-kmp-azureUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade dtb-qcomUpgrade dtb-socionextUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-rtUpgrade kernel-defaultUpgrade kernel-azure-optionalUpgrade kernel-rt-optionalUpgrade kernel-docs-htmlUpgrade dtb-caviumUpgrade dlm-kmp-defaultUpgrade kernel-debug-vdsoUpgrade kernel-azure-develUpgrade kernel-64kb-extraUpgrade cluster-md-kmp-rtUpgrade kernel-rt-extraUpgrade kernel-source-vanillaUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azureUpgrade dtb-allwinnerUpgrade kernel-obs-buildUpgrade reiserfs-kmp-azureUpgrade kernel-rt_debug-develUpgrade kernel-default-livepatch-develUpgrade kernel-source-rtUpgrade reiserfs-kmp-64kbUpgrade gfs2-kmp-defaultUpgrade dtb-sprdUpgrade dtb-nvidiaUpgrade dtb-rockchipUpgrade cluster-md-kmp-64kbUpgrade kernel-default-base-rebuildUpgrade ocfs2-kmp-defaultUpgrade gfs2-kmp-azure | Jun 24, 2024 | Apr 3, 2024 |
| Ubuntu | — | Upgrade linux-raspi-realtime | Feb 11, 2025 | Apr 3, 2024 |
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