ghsa-mwvh-q9h7-62fg
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tracefs: Use generic inode RCU for synchronizing freeing
With structure layout randomization enabled for 'struct inode' we need to avoid overlapping any of the RCU-used / initialized-only-once members, e.g. i_lru or i_sb_list to not corrupt related list traversals when making use of the rcu_head.
For an unlucky structure layout of 'struct inode' we may end up with the following splat when running the ftrace selftests:
[<...>] list_del corruption, ffff888103ee2cb0->next (tracefs_inode_cache+0x0/0x4e0 [slab object]) is NULL (prev is tracefs_inode_cache+0x78/0x4e0 [slab object])
[<...>] ------------[ cut here ]------------
[<...>] kernel BUG at lib/list_debug.c:54!
[<...>] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[<...>] CPU: 3 PID: 2550 Comm: mount Tainted: G N 6.8.12-grsec+ #122 ed2f536ca62f28b087b90e3cc906a8d25b3ddc65
[<...>] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
[<...>] RIP: 0010:[
{
"affected": [],
"aliases": [
"CVE-2024-44959"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-04T19:15:30Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracefs: Use generic inode RCU for synchronizing freeing\n\nWith structure layout randomization enabled for \u0027struct inode\u0027 we need to\navoid overlapping any of the RCU-used / initialized-only-once members,\ne.g. i_lru or i_sb_list to not corrupt related list traversals when making\nuse of the rcu_head.\n\nFor an unlucky structure layout of \u0027struct inode\u0027 we may end up with the\nfollowing splat when running the ftrace selftests:\n\n[\u003c...\u003e] list_del corruption, ffff888103ee2cb0-\u003enext (tracefs_inode_cache+0x0/0x4e0 [slab object]) is NULL (prev is tracefs_inode_cache+0x78/0x4e0 [slab object])\n[\u003c...\u003e] ------------[ cut here ]------------\n[\u003c...\u003e] kernel BUG at lib/list_debug.c:54!\n[\u003c...\u003e] invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n[\u003c...\u003e] CPU: 3 PID: 2550 Comm: mount Tainted: G N 6.8.12-grsec+ #122 ed2f536ca62f28b087b90e3cc906a8d25b3ddc65\n[\u003c...\u003e] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\n[\u003c...\u003e] RIP: 0010:[\u003cffffffff84656018\u003e] __list_del_entry_valid_or_report+0x138/0x3e0\n[\u003c...\u003e] Code: 48 b8 99 fb 65 f2 ff ff ff ff e9 03 5c d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff e9 33 5a d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff \u003c0f\u003e 0b 4c 89 e9 48 89 ea 48 89 ee 48 c7 c7 60 8f dd 89 31 c0 e8 2f\n[\u003c...\u003e] RSP: 0018:fffffe80416afaf0 EFLAGS: 00010283\n[\u003c...\u003e] RAX: 0000000000000098 RBX: ffff888103ee2cb0 RCX: 0000000000000000\n[\u003c...\u003e] RDX: ffffffff84655fe8 RSI: ffffffff89dd8b60 RDI: 0000000000000001\n[\u003c...\u003e] RBP: ffff888103ee2cb0 R08: 0000000000000001 R09: fffffbd0082d5f25\n[\u003c...\u003e] R10: fffffe80416af92f R11: 0000000000000001 R12: fdf99c16731d9b6d\n[\u003c...\u003e] R13: 0000000000000000 R14: ffff88819ad4b8b8 R15: 0000000000000000\n[\u003c...\u003e] RBX: tracefs_inode_cache+0x0/0x4e0 [slab object]\n[\u003c...\u003e] RDX: __list_del_entry_valid_or_report+0x108/0x3e0\n[\u003c...\u003e] RSI: __func__.47+0x4340/0x4400\n[\u003c...\u003e] RBP: tracefs_inode_cache+0x0/0x4e0 [slab object]\n[\u003c...\u003e] RSP: process kstack fffffe80416afaf0+0x7af0/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R09: kasan shadow of process kstack fffffe80416af928+0x7928/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R10: process kstack fffffe80416af92f+0x792f/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R14: tracefs_inode_cache+0x78/0x4e0 [slab object]\n[\u003c...\u003e] FS: 00006dcb380c1840(0000) GS:ffff8881e0600000(0000) knlGS:0000000000000000\n[\u003c...\u003e] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[\u003c...\u003e] CR2: 000076ab72b30e84 CR3: 000000000b088004 CR4: 0000000000360ef0 shadow CR4: 0000000000360ef0\n[\u003c...\u003e] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[\u003c...\u003e] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[\u003c...\u003e] ASID: 0003\n[\u003c...\u003e] Stack:\n[\u003c...\u003e] ffffffff818a2315 00000000f5c856ee ffffffff896f1840 ffff888103ee2cb0\n[\u003c...\u003e] ffff88812b6b9750 0000000079d714b6 fffffbfff1e9280b ffffffff8f49405f\n[\u003c...\u003e] 0000000000000001 0000000000000000 ffff888104457280 ffffffff8248b392\n[\u003c...\u003e] Call Trace:\n[\u003c...\u003e] \u003cTASK\u003e\n[\u003c...\u003e] [\u003cffffffff818a2315\u003e] ? lock_release+0x175/0x380 fffffe80416afaf0\n[\u003c...\u003e] [\u003cffffffff8248b392\u003e] list_lru_del+0x152/0x740 fffffe80416afb48\n[\u003c...\u003e] [\u003cffffffff8248ba93\u003e] list_lru_del_obj+0x113/0x280 fffffe80416afb88\n[\u003c...\u003e] [\u003cffffffff8940fd19\u003e] ? _atomic_dec_and_lock+0x119/0x200 fffffe80416afb90\n[\u003c...\u003e] [\u003cffffffff8295b244\u003e] iput_final+0x1c4/0x9a0 fffffe80416afbb8\n[\u003c...\u003e] [\u003cffffffff8293a52b\u003e] dentry_unlink_inode+0x44b/0xaa0 fffffe80416afbf8\n[\u003c...\u003e] [\u003cffffffff8293fefc\u003e] __dentry_kill+0x23c/0xf00 fffffe80416afc40\n[\u003c...\u003e] [\u003cffffffff8953a85f\u003e] ? __this_cpu_preempt_check+0x1f/0xa0 fffffe80416afc48\n[\u003c...\u003e] [\u003cffffffff82949ce5\u003e] ? shrink_dentry_list+0x1c5/0x760 fffffe80416afc70\n[\u003c...\u003e] [\u003cffffffff82949b71\u003e] ? shrink_dentry_list+0x51/0x760 fffffe80416afc78\n[\u003c...\u003e] [\u003cffffffff82949da8\u003e] shrink_dentry_list+0x288/0x760 fffffe80416afc80\n[\u003c...\u003e] [\u003cffffffff8294ae75\u003e] shrink_dcache_sb+0x155/0x420 fffffe80416afcc8\n[\u003c...\u003e] [\u003cffffffff8953a7c3\u003e] ? debug_smp_processor_id+0x23/0xa0 fffffe80416afce0\n[\u003c...\u003e] [\u003cffffffff8294ad20\u003e] ? do_one_tre\n---truncated---",
"id": "GHSA-mwvh-q9h7-62fg",
"modified": "2024-10-10T18:31:08Z",
"published": "2024-09-04T21:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44959"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/061da60716ce0cde99f62f31937b81e1c03acef6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0b6743bd60a56a701070b89fb80c327a44b7b3e2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/726f4c241e17be75a9cf6870d80cd7479dc89e8f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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