GHSA-GFGX-M82F-4X3G

Vulnerability from github – Published: 2024-07-12 15:31 – Updated: 2026-05-12 12:32
VLAI
Details

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

block/ioctl: prefer different overflow check

Running syzkaller with the newly reintroduced signed integer overflow sanitizer shows this report:

[ 62.982337] ------------[ cut here ]------------ [ 62.985692] cgroup: Invalid name [ 62.986211] UBSAN: signed-integer-overflow in ../block/ioctl.c:36:46 [ 62.989370] 9pnet_fd: p9_fd_create_tcp (7343): problem connecting socket to 127.0.0.1 [ 62.992992] 9223372036854775807 + 4095 cannot be represented in type 'long long' [ 62.997827] 9pnet_fd: p9_fd_create_tcp (7345): problem connecting socket to 127.0.0.1 [ 62.999369] random: crng reseeded on system resumption [ 63.000634] GUP no longer grows the stack in syz-executor.2 (7353): 20002000-20003000 (20001000) [ 63.000668] CPU: 0 PID: 7353 Comm: syz-executor.2 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1 [ 63.000677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 63.000682] Call Trace: [ 63.000686] [ 63.000731] dump_stack_lvl+0x93/0xd0 [ 63.000919] __get_user_pages+0x903/0xd30 [ 63.001030] __gup_longterm_locked+0x153e/0x1ba0 [ 63.001041] ? _raw_read_unlock_irqrestore+0x17/0x50 [ 63.001072] ? try_get_folio+0x29c/0x2d0 [ 63.001083] internal_get_user_pages_fast+0x1119/0x1530 [ 63.001109] iov_iter_extract_pages+0x23b/0x580 [ 63.001206] bio_iov_iter_get_pages+0x4de/0x1220 [ 63.001235] iomap_dio_bio_iter+0x9b6/0x1410 [ 63.001297] __iomap_dio_rw+0xab4/0x1810 [ 63.001316] iomap_dio_rw+0x45/0xa0 [ 63.001328] ext4_file_write_iter+0xdde/0x1390 [ 63.001372] vfs_write+0x599/0xbd0 [ 63.001394] ksys_write+0xc8/0x190 [ 63.001403] do_syscall_64+0xd4/0x1b0 [ 63.001421] ? arch_exit_to_user_mode_prepare+0x3a/0x60 [ 63.001479] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 63.001535] RIP: 0033:0x7f7fd3ebf539 [ 63.001551] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 14 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 63.001562] RSP: 002b:00007f7fd32570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 63.001584] RAX: ffffffffffffffda RBX: 00007f7fd3ff3f80 RCX: 00007f7fd3ebf539 [ 63.001590] RDX: 4db6d1e4f7e43360 RSI: 0000000020000000 RDI: 0000000000000004 [ 63.001595] RBP: 00007f7fd3f1e496 R08: 0000000000000000 R09: 0000000000000000 [ 63.001599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 63.001604] R13: 0000000000000006 R14: 00007f7fd3ff3f80 R15: 00007ffd415ad2b8 ... [ 63.018142] ---[ end trace ]---

Historically, the signed integer overflow sanitizer did not work in the kernel due to its interaction with -fwrapv but this has since been changed 1 in the newest version of Clang; It was re-enabled in the kernel with Commit 557f8c582a9ba8ab ("ubsan: Reintroduce signed overflow sanitizer").

Let's rework this overflow checking logic to not actually perform an overflow during the check itself, thus avoiding the UBSAN splat.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-41000"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:20Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock/ioctl: prefer different overflow check\n\nRunning syzkaller with the newly reintroduced signed integer overflow\nsanitizer shows this report:\n\n[   62.982337] ------------[ cut here ]------------\n[   62.985692] cgroup: Invalid name\n[   62.986211] UBSAN: signed-integer-overflow in ../block/ioctl.c:36:46\n[   62.989370] 9pnet_fd: p9_fd_create_tcp (7343): problem connecting socket to 127.0.0.1\n[   62.992992] 9223372036854775807 + 4095 cannot be represented in type \u0027long long\u0027\n[   62.997827] 9pnet_fd: p9_fd_create_tcp (7345): problem connecting socket to 127.0.0.1\n[   62.999369] random: crng reseeded on system resumption\n[   63.000634] GUP no longer grows the stack in syz-executor.2 (7353): 20002000-20003000 (20001000)\n[   63.000668] CPU: 0 PID: 7353 Comm: syz-executor.2 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1\n[   63.000677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   63.000682] Call Trace:\n[   63.000686]  \u003cTASK\u003e\n[   63.000731]  dump_stack_lvl+0x93/0xd0\n[   63.000919]  __get_user_pages+0x903/0xd30\n[   63.001030]  __gup_longterm_locked+0x153e/0x1ba0\n[   63.001041]  ? _raw_read_unlock_irqrestore+0x17/0x50\n[   63.001072]  ? try_get_folio+0x29c/0x2d0\n[   63.001083]  internal_get_user_pages_fast+0x1119/0x1530\n[   63.001109]  iov_iter_extract_pages+0x23b/0x580\n[   63.001206]  bio_iov_iter_get_pages+0x4de/0x1220\n[   63.001235]  iomap_dio_bio_iter+0x9b6/0x1410\n[   63.001297]  __iomap_dio_rw+0xab4/0x1810\n[   63.001316]  iomap_dio_rw+0x45/0xa0\n[   63.001328]  ext4_file_write_iter+0xdde/0x1390\n[   63.001372]  vfs_write+0x599/0xbd0\n[   63.001394]  ksys_write+0xc8/0x190\n[   63.001403]  do_syscall_64+0xd4/0x1b0\n[   63.001421]  ? arch_exit_to_user_mode_prepare+0x3a/0x60\n[   63.001479]  entry_SYSCALL_64_after_hwframe+0x6f/0x77\n[   63.001535] RIP: 0033:0x7f7fd3ebf539\n[   63.001551] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 14 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48\n[   63.001562] RSP: 002b:00007f7fd32570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[   63.001584] RAX: ffffffffffffffda RBX: 00007f7fd3ff3f80 RCX: 00007f7fd3ebf539\n[   63.001590] RDX: 4db6d1e4f7e43360 RSI: 0000000020000000 RDI: 0000000000000004\n[   63.001595] RBP: 00007f7fd3f1e496 R08: 0000000000000000 R09: 0000000000000000\n[   63.001599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n[   63.001604] R13: 0000000000000006 R14: 00007f7fd3ff3f80 R15: 00007ffd415ad2b8\n...\n[   63.018142] ---[ end trace ]---\n\nHistorically, the signed integer overflow sanitizer did not work in the\nkernel due to its interaction with `-fwrapv` but this has since been\nchanged [1] in the newest version of Clang; It was re-enabled in the\nkernel with Commit 557f8c582a9ba8ab (\"ubsan: Reintroduce signed overflow\nsanitizer\").\n\nLet\u0027s rework this overflow checking logic to not actually perform an\noverflow during the check itself, thus avoiding the UBSAN splat.\n\n[1]: https://github.com/llvm/llvm-project/pull/82432",
  "id": "GHSA-gfgx-m82f-4x3g",
  "modified": "2026-05-12T12:32:03Z",
  "published": "2024-07-12T15:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41000"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3220c90f4dbdc6d20d0608b164d964434a810d66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54160fb1db2de367485f21e30196c42f7ee0be4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58706e482bf45c4db48b0c53aba2468c97adda24"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61ec76ec930709b7bcd69029ef1fe90491f20cf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccb326b5f9e623eb7f130fbbf2505ec0e2dcaff9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd841ee01fb4a79cb7f5cc424b5c96c3a73b2d1e"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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