ghsa-pxxv-p7c4-h643
Vulnerability from github
Published
2024-03-06 09:30
Modified
2024-06-27 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

UBSAN: array-index-out-of-bounds in dtSplitRoot

Syzkaller reported the following issue:

oop0: detected capacity change from 0 to 32768

UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot [128]' CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000

The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0.

The patch is tested via syzbot.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52603"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-06T07:15:11Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nUBSAN: array-index-out-of-bounds in dtSplitRoot\n\nSyzkaller reported the following issue:\n\noop0: detected capacity change from 0 to 32768\n\nUBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9\nindex -2 is out of range for type \u0027struct dtslot [128]\u0027\nCPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n ubsan_epilogue lib/ubsan.c:151 [inline]\n __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283\n dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971\n dtSplitUp fs/jfs/jfs_dtree.c:985 [inline]\n dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863\n jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270\n vfs_mkdir+0x3b3/0x590 fs/namei.c:4013\n do_mkdirat+0x279/0x550 fs/namei.c:4038\n __do_sys_mkdirat fs/namei.c:4053 [inline]\n __se_sys_mkdirat fs/namei.c:4051 [inline]\n __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fcdc0113fd9\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9\nRDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003\nRBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0\nR10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000\nR13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000\n \u003c/TASK\u003e\n\nThe issue is caused when the value of fsi becomes less than -1.\nThe check to break the loop when fsi value becomes -1 is present\nbut syzbot was able to produce value less than -1 which cause the error.\nThis patch simply add the change for the values less than 0.\n\nThe patch is tested via syzbot.",
  "id": "GHSA-pxxv-p7c4-h643",
  "modified": "2024-06-27T15:30:38Z",
  "published": "2024-03-06T09:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52603"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e2902ecc77e9760a9fc447f56d598383e2372d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7aa33854477d9c346f5560a1a1fcb3fe7783e2a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e30b52a2ea3d1e0aaee68096957cf90a2f4ec5af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4cbc857d75d4e22a1f75446e7480b1f305d8d60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4ce01c25ccbea02a09a5291c21749b1fc358e39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/edff092a59260bf0b0a2eba219cb3da6372c2f9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd3486a893778770557649fe28afa5e463d4ed07"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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