ghsa-68x5-x32c-8c8w
Vulnerability from github
Published
2024-05-21 18:31
Modified
2024-05-21 18:31
Details

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> [] __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 [] instrument_atomic_read include/linux/instrumented.h:72 [inline] [] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] [] cpumask_test_cpu include/linux/cpumask.h:506 [inline] [] cpu_online include/linux/cpumask.h:1092 [inline] [] trace_lock_acquire include/trace/events/lock.h:24 [inline] [] lock_acquire+0xe2/0x590 kernel/locking/lockdep.c:5632 [] rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:306 [] rcu_read_lock include/linux/rcupdate.h:747 [inline] [] ip6_pol_route+0x15d/0x1440 net/ipv6/route.c:2221 [] ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2606 [] pol_lookup_func include/net/ip6_fib.h:584 [inline] [] fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116 [] ip6_route_output_flags_noref+0x2d9/0x3a0 net/ipv6/route.c:2638 [] ip6_route_output_flags+0xca/0x340 net/ipv6/route.c:2651 [] ip6_route_output include/net/ip6_route.h:100 [inline] [] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:473 [inline] [] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline] [] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline] [] ipvlan_queue_xmit+0xc33/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677 [] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229 [] netdev_start_xmit include/linux/netdevice.h:4966 [inline] [] xmit_one net/core/dev.c:3644 [inline] [] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660 [] __dev_queue_xmit+0x16b2/0x3370 net/core/dev.c:4324 [] dev_queue_xmit include/linux/netdevice.h:3067 [inline] [] neigh_hh_output include/net/neighbour.h:529 [inline] [<f ---truncated---

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52796"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:18Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: add ipvlan_route_v6_outbound() helper\n\nInspired by syzbot reports using a stack of multiple ipvlan devices.\n\nReduce stack size needed in ipvlan_process_v6_outbound() by moving\nthe flowi6 struct used for the route lookup in an non inlined\nhelper. ipvlan_route_v6_outbound() needs 120 bytes on the stack,\nimmediately reclaimed.\n\nAlso make sure ipvlan_process_v4_outbound() is not inlined.\n\nWe might also have to lower MAX_NEST_DEV, because only syzbot uses\nsetups with more than four stacked devices.\n\nBUG: TASK stack guard page was hit at ffffc9000e803ff8 (stack is ffffc9000e804000..ffffc9000e808000)\nstack guard page: 0000 [#1] SMP KASAN\nCPU: 0 PID: 13442 Comm: syz-executor.4 Not tainted 6.1.52-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\nRIP: 0010:kasan_check_range+0x4/0x2a0 mm/kasan/generic.c:188\nCode: 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 \u003c41\u003e 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 a4 01 00 00 48 89\nRSP: 0018:ffffc9000e804000 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817e5bf2\nRDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff887c6568\nRBP: ffffc9000e804000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001d0080c\nR13: dffffc0000000000 R14: ffffffff87e6b100 R15: 0000000000000000\nFS: 00007fd0c55826c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffc9000e803ff8 CR3: 0000000170ef7000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003c#DF\u003e\n\u003c/#DF\u003e\n\u003cTASK\u003e\n[\u003cffffffff81f281d1\u003e] __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31\n[\u003cffffffff817e5bf2\u003e] instrument_atomic_read include/linux/instrumented.h:72 [inline]\n[\u003cffffffff817e5bf2\u003e] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\n[\u003cffffffff817e5bf2\u003e] cpumask_test_cpu include/linux/cpumask.h:506 [inline]\n[\u003cffffffff817e5bf2\u003e] cpu_online include/linux/cpumask.h:1092 [inline]\n[\u003cffffffff817e5bf2\u003e] trace_lock_acquire include/trace/events/lock.h:24 [inline]\n[\u003cffffffff817e5bf2\u003e] lock_acquire+0xe2/0x590 kernel/locking/lockdep.c:5632\n[\u003cffffffff8563221e\u003e] rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:306\n[\u003cffffffff8561464d\u003e] rcu_read_lock include/linux/rcupdate.h:747 [inline]\n[\u003cffffffff8561464d\u003e] ip6_pol_route+0x15d/0x1440 net/ipv6/route.c:2221\n[\u003cffffffff85618120\u003e] ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2606\n[\u003cffffffff856f65b5\u003e] pol_lookup_func include/net/ip6_fib.h:584 [inline]\n[\u003cffffffff856f65b5\u003e] fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116\n[\u003cffffffff85618009\u003e] ip6_route_output_flags_noref+0x2d9/0x3a0 net/ipv6/route.c:2638\n[\u003cffffffff8561821a\u003e] ip6_route_output_flags+0xca/0x340 net/ipv6/route.c:2651\n[\u003cffffffff838bd5a3\u003e] ip6_route_output include/net/ip6_route.h:100 [inline]\n[\u003cffffffff838bd5a3\u003e] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:473 [inline]\n[\u003cffffffff838bd5a3\u003e] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline]\n[\u003cffffffff838bd5a3\u003e] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]\n[\u003cffffffff838bd5a3\u003e] ipvlan_queue_xmit+0xc33/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677\n[\u003cffffffff838c2909\u003e] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229\n[\u003cffffffff84d03900\u003e] netdev_start_xmit include/linux/netdevice.h:4966 [inline]\n[\u003cffffffff84d03900\u003e] xmit_one net/core/dev.c:3644 [inline]\n[\u003cffffffff84d03900\u003e] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660\n[\u003cffffffff84d080e2\u003e] __dev_queue_xmit+0x16b2/0x3370 net/core/dev.c:4324\n[\u003cffffffff855ce4cd\u003e] dev_queue_xmit include/linux/netdevice.h:3067 [inline]\n[\u003cffffffff855ce4cd\u003e] neigh_hh_output include/net/neighbour.h:529 [inline]\n[\u003cf\n---truncated---",
  "id": "GHSA-68x5-x32c-8c8w",
  "modified": "2024-05-21T18:31:21Z",
  "published": "2024-05-21T18:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52796"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03cddc4df8c6be47fd27c8f8b87e5f9a989e1458"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/18f039428c7df183b09c69ebf10ffd4e521035d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f64cad3ac38ac5978b53c40e6c5e6fd3477c68f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43b781e7cb5cd0b435de276111953bf2bacd1f02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d2d30f0792b47908af64c4d02ed1ee25ff50542"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f7f850611aa27aaaf1bf5687702ad2240ae442a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/732a67ca436887b594ebc43bb5a04ffb0971a760"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8872dc638c24bb774cd2224a69d72a7f661a4d56"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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