ghsa-798m-xwf9-pjw6
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net/smc: Fix possible access to freed memory in link clear
After modifying the QP to the Error state, all RX WR would be completed with WC in IB_WC_WR_FLUSH_ERR status. Current implementation does not wait for it is done, but destroy the QP and free the link group directly. So there is a risk that accessing the freed memory in tasklet context.
Here is a crash example:
BUG: unable to handle page fault for address: ffffffff8f220860
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD f7300e067 P4D f7300e067 PUD f7300f063 PMD 8c4e45063 PTE 800ffff08c9df060
Oops: 0002 [#1] SMP PTI
CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: G S OE 5.10.0-0607+ #23
Hardware name: Inspur NF5280M4/YZMB-00689-101, BIOS 4.1.20 07/09/2018
RIP: 0010:native_queued_spin_lock_slowpath+0x176/0x1b0
Code: f3 90 48 8b 32 48 85 f6 74 f6 eb d5 c1 ee 12 83 e0 03 83 ee 01 48 c1 e0 05 48 63 f6 48 05 00 c8 02 00 48 03 04 f5 00 09 98 8e <48> 89 10 8b 42 08 85 c0 75 09 f3 90 8b 42 08 85 c0 74 f7 48 8b 32
RSP: 0018:ffffb3b6c001ebd8 EFLAGS: 00010086
RAX: ffffffff8f220860 RBX: 0000000000000246 RCX: 0000000000080000
RDX: ffff91db1f86c800 RSI: 000000000000173c RDI: ffff91db62bace00
RBP: ffff91db62bacc00 R08: 0000000000000000 R09: c00000010000028b
R10: 0000000000055198 R11: ffffb3b6c001ea58 R12: ffff91db80e05010
R13: 000000000000000a R14: 0000000000000006 R15: 0000000000000040
FS: 0000000000000000(0000) GS:ffff91db1f840000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8f220860 CR3: 00000001f9580004 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
{
"affected": [],
"aliases": [
"CVE-2022-48673"
],
"database_specific": {
"cwe_ids": [
"CWE-755"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T15:15:07Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: Fix possible access to freed memory in link clear\n\nAfter modifying the QP to the Error state, all RX WR would be completed\nwith WC in IB_WC_WR_FLUSH_ERR status. Current implementation does not\nwait for it is done, but destroy the QP and free the link group directly.\nSo there is a risk that accessing the freed memory in tasklet context.\n\nHere is a crash example:\n\n BUG: unable to handle page fault for address: ffffffff8f220860\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD f7300e067 P4D f7300e067 PUD f7300f063 PMD 8c4e45063 PTE 800ffff08c9df060\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: G S OE 5.10.0-0607+ #23\n Hardware name: Inspur NF5280M4/YZMB-00689-101, BIOS 4.1.20 07/09/2018\n RIP: 0010:native_queued_spin_lock_slowpath+0x176/0x1b0\n Code: f3 90 48 8b 32 48 85 f6 74 f6 eb d5 c1 ee 12 83 e0 03 83 ee 01 48 c1 e0 05 48 63 f6 48 05 00 c8 02 00 48 03 04 f5 00 09 98 8e \u003c48\u003e 89 10 8b 42 08 85 c0 75 09 f3 90 8b 42 08 85 c0 74 f7 48 8b 32\n RSP: 0018:ffffb3b6c001ebd8 EFLAGS: 00010086\n RAX: ffffffff8f220860 RBX: 0000000000000246 RCX: 0000000000080000\n RDX: ffff91db1f86c800 RSI: 000000000000173c RDI: ffff91db62bace00\n RBP: ffff91db62bacc00 R08: 0000000000000000 R09: c00000010000028b\n R10: 0000000000055198 R11: ffffb3b6c001ea58 R12: ffff91db80e05010\n R13: 000000000000000a R14: 0000000000000006 R15: 0000000000000040\n FS: 0000000000000000(0000) GS:ffff91db1f840000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffffffff8f220860 CR3: 00000001f9580004 CR4: 00000000003706e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n \u003cIRQ\u003e\n _raw_spin_lock_irqsave+0x30/0x40\n mlx5_ib_poll_cq+0x4c/0xc50 [mlx5_ib]\n smc_wr_rx_tasklet_fn+0x56/0xa0 [smc]\n tasklet_action_common.isra.21+0x66/0x100\n __do_softirq+0xd5/0x29c\n asm_call_irq_on_stack+0x12/0x20\n \u003c/IRQ\u003e\n do_softirq_own_stack+0x37/0x40\n irq_exit_rcu+0x9d/0xa0\n sysvec_call_function_single+0x34/0x80\n asm_sysvec_call_function_single+0x12/0x20",
"id": "GHSA-798m-xwf9-pjw6",
"modified": "2024-06-03T18:53:45Z",
"published": "2024-05-03T15:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48673"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89fcb70f1acd6b0bbf2f7bfbf45d7aa75a9bdcde"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e9b1a4f867ae9c1dbd1d71cd09cbdb3239fb4968"
}
],
"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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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.