ghsa-3w4p-cp93-7566
Vulnerability from github
Published
2024-04-17 12:32
Modified
2024-06-26 00:31
Details
In the Linux kernel, the following vulnerability has been resolved:
afs: Fix endless loop in directory parsing
If a directory has a block with only ".__afsXXXX" files in it (from uncompleted silly-rename), these .__afsXXXX files are skipped but without advancing the file position in the dir_context. This leads to afs_dir_iterate() repeating the block again and again.
Fix this by making the code that skips the .__afsXXXX file also manually advance the file position.
The symptoms are a soft lookup:
watchdog: BUG: soft lockup - CPU#3 stuck for 52s! [check:5737]
...
RIP: 0010:afs_dir_iterate_block+0x39/0x1fd
...
? watchdog_timer_fn+0x1a6/0x213
...
? asm_sysvec_apic_timer_interrupt+0x16/0x20
? afs_dir_iterate_block+0x39/0x1fd
afs_dir_iterate+0x10a/0x148
afs_readdir+0x30/0x4a
iterate_dir+0x93/0xd3
__do_sys_getdents64+0x6b/0xd4
This is almost certainly the actual fix for:
https://bugzilla.kernel.org/show_bug.cgi?id=218496
{
"affected": [],
"aliases": [
"CVE-2024-26848"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-17T11:15:08Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix endless loop in directory parsing\n\nIf a directory has a block with only \".__afsXXXX\" files in it (from\nuncompleted silly-rename), these .__afsXXXX files are skipped but without\nadvancing the file position in the dir_context. This leads to\nafs_dir_iterate() repeating the block again and again.\n\nFix this by making the code that skips the .__afsXXXX file also manually\nadvance the file position.\n\nThe symptoms are a soft lookup:\n\n watchdog: BUG: soft lockup - CPU#3 stuck for 52s! [check:5737]\n ...\n RIP: 0010:afs_dir_iterate_block+0x39/0x1fd\n ...\n ? watchdog_timer_fn+0x1a6/0x213\n ...\n ? asm_sysvec_apic_timer_interrupt+0x16/0x20\n ? afs_dir_iterate_block+0x39/0x1fd\n afs_dir_iterate+0x10a/0x148\n afs_readdir+0x30/0x4a\n iterate_dir+0x93/0xd3\n __do_sys_getdents64+0x6b/0xd4\n\nThis is almost certainly the actual fix for:\n\n https://bugzilla.kernel.org/show_bug.cgi?id=218496",
"id": "GHSA-3w4p-cp93-7566",
"modified": "2024-06-26T00:31:37Z",
"published": "2024-04-17T12:32:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26848"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/058ed71e0f7aa3b6694ca357e23d084e5d3f2470"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/106e14ca55a0acb3236ee98813a1d243f8aa2d05"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2afdd0cb02329464d77f3ec59468395c791a51a4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5c78be006ed9cb735ac2abf4fd64f3f4ea26da31"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5f7a07646655fb4108da527565dcdc80124b14c4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/76426abf9b980b46983f97de8e5b25047b4c9863"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80b15346492bdba677bbb0adefc611910e505f7b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/854ebf45a4ddd4cadeffb6644e88d19020634e1a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/96370ba395c572ef496fd2c7afc4a1ab3dedd3f0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9c41f4935625218a2053a2dce1423c3054169809"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a6ffae61ad9ebf2fdcb943135b2f30c85f49cd27"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b94f434fe977689da4291dc21717790b9bd1c064"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f67898867b6b0f4542cddc7fe57997978b948a7a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fe02316e4933befc621fa125efb8f8b4d04cceec"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
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