In the Linux kernel, the following vulnerability has been resolved:
ipvlan: add ipvlan_route_v6_outbound() helper
Inspired by syzbot reports using a stack of multiple ipvlan devices.
Reduce stack size needed in ipvlan_process_v6_outbound() by moving the flowi6 struct used for the route lookup in an non inlined helper. ipvlan_route_v6_outbound() needs 120 bytes on the stack, immediately reclaimed.
Also make sure ipvlan_process_v4_outbound() is not inlined.
We might also have to lower MAX_NEST_DEV, because only syzbot uses setups with more than four stacked devices.
BUG: TASK stack guard page was hit at ffffc9000e803ff8 (stack is ffffc9000e804000..ffffc9000e808000) stack guard page: 0000 [#1] SMP KASAN CPU: 0 PID: 13442 Comm: syz-executor.4 Not tainted 6.1.52-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:kasan_check_range+0x4/0x2a0 mm/kasan/generic.c:188 Code: 48 01 c6 48 89 c7 e8 db 4e c1 03 31 c0 5d c3 cc 0f 0b eb 02 0f 0b b8 ea ff ff ff 5d c3 cc 00 00 cc cc 00 00 cc cc 55 48 89 e5 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 a4 01 00 00 48 89 RSP: 0018:ffffc9000e804000 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817e5bf2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff887c6568 RBP: ffffc9000e804000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001d0080c R13: dffffc0000000000 R14: ffffffff87e6b100 R15: 0000000000000000 FS: 00007fd0c55826c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000e803ff8 CR3: 0000000170ef7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> [<ffffffff81f281d1>] __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 [<ffffffff817e5bf2>] instrument_atomic_read include/linux/instrumented.h:72 [inline] [<ffffffff817e5bf2>] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] [<ffffffff817e5bf2>] cpumask_test_cpu include/linux/cpumask.h:506 [inline] [<ffffffff817e5bf2>] cpu_online include/linux/cpumask.h:1092 [inline] [<ffffffff817e5bf2>] trace_lock_acquire include/trace/events/lock.h:24 [inline] [<ffffffff817e5bf2>] lock_acquire+0xe2/0x590 kernel/locking/lockdep.c:5632 [<ffffffff8563221e>] rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:306 [<ffffffff8561464d>] rcu_read_lock include/linux/rcupdate.h:747 [inline] [<ffffffff8561464d>] ip6_pol_route+0x15d/0x1440 net/ipv6/route.c:2221 [<ffffffff85618120>] ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2606 [<ffffffff856f65b5>] pol_lookup_func include/net/ip6_fib.h:584 [inline] [<ffffffff856f65b5>] fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116 [<ffffffff85618009>] ip6_route_output_flags_noref+0x2d9/0x3a0 net/ipv6/route.c:2638 [<ffffffff8561821a>] ip6_route_output_flags+0xca/0x340 net/ipv6/route.c:2651 [<ffffffff838bd5a3>] ip6_route_output include/net/ip6_route.h:100 [inline] [<ffffffff838bd5a3>] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:473 [inline] [<ffffffff838bd5a3>] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline] [<ffffffff838bd5a3>] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline] [<ffffffff838bd5a3>] ipvlan_queue_xmit+0xc33/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677 [<ffffffff838c2909>] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229 [<ffffffff84d03900>] netdev_start_xmit include/linux/netdevice.h:4966 [inline] [<ffffffff84d03900>] xmit_one net/core/dev.c:3644 [inline] [<ffffffff84d03900>] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660 [<ffffffff84d080e2>] __dev_queue_xmit+0x16b2/0x3370 net/core/dev.c:4324 [<ffffffff855ce4cd>] dev_queue_xmit include/linux/netdevice.h:3067 [inline] [<ffffffff855ce4cd>] neigh_hh_output include/net/neighbour.h:529 [inline] [<f ---truncated---
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade bpftoolUpgrade kernel-rt-kvmUpgrade kernel-toolsUpgrade kernel-rtUpgrade kernel-tools-libs-develUpgrade kernel-abi-stablelistsUpgrade kernel-zfcpdumpUpgrade kernel-zfcpdump-coreUpgrade kernel-docUpgrade kernel-rt-debug-modules-extraUpgrade perfUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-rt-develUpgrade kernel-zfcpdump-modulesUpgrade kernel-tools-libsUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-modulesUpgrade kernel-debugUpgrade kernel-zfcpdump-develUpgrade kernel-modules-extraUpgrade kernel-rt-debug-kvmUpgrade kernel-rt-coreUpgrade kernel-debug-develUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debug-develUpgrade kernel-develUpgrade python3-perfUpgrade kernel-rt-modules-extraUpgrade kernel-headersUpgrade kernel-modulesUpgrade kernelUpgrade kernel-rt-debugUpgrade kernel-debug-coreUpgrade kernel-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-cross-headers | Aug 12, 2024 | May 21, 2024 |
| Amazon Linux Ami 2 | — | Upgrade kernel-toolsUpgrade python-perfUpgrade kernel-livepatch-5.10.205-195.804Upgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-livepatch-4.14.349-266.564Upgrade bpftool-debuginfoUpgrade kernel-develUpgrade bpftoolUpgrade perfUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.145-95.156Upgrade kernel-tools-devel | Jun 26, 2024 | May 21, 2024 |
| Amazon_linux_2023 | — | Upgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-develUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-libbpfUpgrade python3-perfUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernelUpgrade python3-perf-debuginfoUpgrade kernel-livepatch-6.1.66-91.160Upgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade perf | Feb 17, 2025 | May 21, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-tools | Oct 8, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perfUpgrade kernel | Oct 8, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernelUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libs | Oct 8, 2024 | May 21, 2024 |
| Oracle_linux | — | Upgrade kernel-uekUpgrade kernel | Aug 16, 2024 | May 21, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Aug 12, 2024 | May 21, 2024 |
| Rocky_linux | — | Upgrade kernel-rt-modulesUpgrade kernel-rt-debuginfoUpgrade kernel-tools-libsUpgrade kernel-rt-modules-extraUpgrade kernel-rt-debugUpgrade perfUpgrade python3-perfUpgrade kernel-develUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rtUpgrade kernel-toolsUpgrade kernel-debug-debuginfoUpgrade kernel-rt-kvmUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-rt-debug-coreUpgrade bpftoolUpgrade kernel-tools-libs-develUpgrade python3-perf-debuginfoUpgrade kernel-rt-develUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade kernel-debug-modules-extraUpgrade kernel-debug-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-modules-extraUpgrade kernel-modulesUpgrade kernel-debug-develUpgrade kernel-rt-coreUpgrade kernel-cross-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-coreUpgrade kernel-rt-debug-kvmUpgrade perf-debuginfoUpgrade kernel-rt-debug-modulesUpgrade kernel-tools-debuginfoUpgrade kernel-debug | Aug 22, 2024 | May 21, 2024 |
| Suse | — | Upgrade kernel-sourceUpgrade kernel-zfcpdumpUpgrade gfs2-kmp-rtUpgrade kernel-64kb-livepatch-develUpgrade kernel-rt_debug-develUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-rt-livepatchUpgrade kernel-kvmsmall-develUpgrade gfs2-kmp-64kbUpgrade ocfs2-kmp-64kbUpgrade dtb-exynosUpgrade dlm-kmp-64kbUpgrade kernel-default-optionalUpgrade kernel-debugUpgrade kernel-obs-qaUpgrade dtb-alteraUpgrade kernel-syms-azureUpgrade dtb-xilinxUpgrade kernel-64kb-optionalUpgrade kselftests-kmp-azureUpgrade kernel-default-vdsoUpgrade kernel-devel-azureUpgrade dtb-qcomUpgrade kernel-source-rtUpgrade reiserfs-kmp-64kbUpgrade dtb-caviumUpgrade kernel-default-develUpgrade kernel-docs-htmlUpgrade kernel-azure-extraUpgrade kernel-kvmsmallUpgrade dtb-apmUpgrade dtb-broadcomUpgrade dtb-freescaleUpgrade kernel-source-azureUpgrade dtb-amazonUpgrade dtb-hisiliconUpgrade kernel-symsUpgrade gfs2-kmp-azureUpgrade kernel-64kb-develUpgrade dtb-marvellUpgrade kernel-azure-baseUpgrade dtb-amlogicUpgrade kernel-macrosUpgrade kernel-64kbUpgrade kernel-azure-develUpgrade kernel-default-extraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azure-optionalUpgrade kselftests-kmp-64kbUpgrade kernel-rtUpgrade kernel-azure-livepatch-develUpgrade cluster-md-kmp-defaultUpgrade kernel-debug-livepatch-develUpgrade dtb-lgUpgrade kernel-default-livepatchUpgrade dtb-appleUpgrade ocfs2-kmp-rtUpgrade cluster-md-kmp-azureUpgrade cluster-md-kmp-rtUpgrade kernel-debug-develUpgrade dtb-mediatekUpgrade dlm-kmp-azureUpgrade kernel-develUpgrade kernel-default-base-rebuildUpgrade dlm-kmp-rtUpgrade kernel-default-manUpgrade kernel-rt_debug-vdsoUpgrade gfs2-kmp-defaultUpgrade kernel-obs-buildUpgrade dtb-amdUpgrade kselftests-kmp-defaultUpgrade dtb-allwinnerUpgrade dtb-socionextUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-source-vanillaUpgrade kernel-rt-vdsoUpgrade kernel-default-livepatch-develUpgrade kernel-azure-vdsoUpgrade dtb-sprdUpgrade dtb-renesasUpgrade reiserfs-kmp-defaultUpgrade dtb-nvidiaUpgrade dtb-armUpgrade reiserfs-kmp-azureUpgrade kernel-syms-rtUpgrade kernel-default-baseUpgrade kernel-docsUpgrade kernel-devel-rtUpgrade kernel-64kb-extraUpgrade kernel-defaultUpgrade kernel-rt-livepatch-develUpgrade kernel-rt-extraUpgrade kernel-rt-develUpgrade reiserfs-kmp-rtUpgrade kernel-rt-optionalUpgrade ocfs2-kmp-defaultUpgrade kernel-rt_debugUpgrade kernel-debug-vdsoUpgrade kernel-azureUpgrade dtb-rockchipUpgrade cluster-md-kmp-64kbUpgrade dlm-kmp-defaultUpgrade kernel-rt_debug-livepatch-devel | Jun 12, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-oracleUpgrade linux-raspi-5.4Upgrade linux-fipsUpgrade linux-nvidia-tegra-5.15Upgrade linux-gkeUpgrade linux-nvidia-tegraUpgrade linux-oracle-5.15Upgrade linux-gcp-5.4Upgrade linux-kvmUpgrade linux-azure-5.15Upgrade linux-riscv-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-bluefieldUpgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-nvidia-tegra-igxUpgrade linux-realtimeUpgrade linux-nvidiaUpgrade linux-gcpUpgrade linux-oracle-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotgUpgrade linux-ibm-5.15Upgrade linux-aws-5.15Upgrade linux-gcp-5.15Upgrade linux-gcp-fipsUpgrade linux-aws-fipsUpgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-iotUpgrade linux-aws-5.4Upgrade linux-hwe-5.15Upgrade linux-ibm-5.4Upgrade linux-hwe-5.4Upgrade linux-gkeop-5.15Upgrade linux-azure-fdeUpgrade linux-intel-iotg-5.15Upgrade linuxUpgrade linux-ibmUpgrade linux-azure-fipsUpgrade linux-nvidia-6.5Upgrade linux-lowlatencyUpgrade linux-raspiUpgrade linux-aws | Nov 19, 2024 | May 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 21, 2024 |
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