Description
In the Linux kernel, the following vulnerability has been resolved:
net/bnx2x: Prevent access to a freed page in page_pool
Fix race condition leading to system crash during EEH error handling
During EEH error recovery, the bnx2x driver's transmit timeout logic
could cause a race condition when handling reset tasks. The
bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(),
which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload()
SGEs are freed using bnx2x_free_rx_sge_range(). However, this could
overlap with the EEH driver's attempt to reset the device using
bnx2x_io_slot_reset(), which also tries to free SGEs. This race
condition can result in system crashes due to accessing freed memory
locations in bnx2x_free_rx_sge()
799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp,
800 struct bnx2x_fastpath *fp, u16 index)
801 {
802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];
803 struct page *page = sw_buf->page;
....
where sw_buf was set to NULL after the call to dma_unmap_page()
by the preceding thread.
EEH: Beginning: 'slot_reset'
PCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset()
bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing...
bnx2x 0011:01:00.0: enabling device (0140 -> 0142)
bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload
Kernel attempted to read user page (0) - exploit attempt? (uid: 0)
BUG: Kernel NULL pointer dereference on read at 0x00000000
Faulting instruction address: 0xc0080000025065fc
Oops: Kernel access of bad area, sig: 11 [#1]
.....
Call Trace:
[c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable)
[c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0
[c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550
[c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60
[c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170
[c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0
[c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64
To solve this issue, we need to verify page pool allocations before
freeing.
net/bnx2x: Prevent access to a freed page in page_pool
Fix race condition leading to system crash during EEH error handling
During EEH error recovery, the bnx2x driver's transmit timeout logic
could cause a race condition when handling reset tasks. The
bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(),
which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload()
SGEs are freed using bnx2x_free_rx_sge_range(). However, this could
overlap with the EEH driver's attempt to reset the device using
bnx2x_io_slot_reset(), which also tries to free SGEs. This race
condition can result in system crashes due to accessing freed memory
locations in bnx2x_free_rx_sge()
799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp,
800 struct bnx2x_fastpath *fp, u16 index)
801 {
802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];
803 struct page *page = sw_buf->page;
....
where sw_buf was set to NULL after the call to dma_unmap_page()
by the preceding thread.
EEH: Beginning: 'slot_reset'
PCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset()
bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing...
bnx2x 0011:01:00.0: enabling device (0140 -> 0142)
bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload
Kernel attempted to read user page (0) - exploit attempt? (uid: 0)
BUG: Kernel NULL pointer dereference on read at 0x00000000
Faulting instruction address: 0xc0080000025065fc
Oops: Kernel access of bad area, sig: 11 [#1]
.....
Call Trace:
[c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable)
[c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0
[c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550
[c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60
[c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170
[c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0
[c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64
To solve this issue, we need to verify page pool allocations before
freeing.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-3840-1 | linux security update |
Debian DLA |
DLA-3842-1 | linux-5.10 security update |
Debian DSA |
DSA-5681-1 | linux security update |
Ubuntu USN |
USN-6816-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6817-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6817-2 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-6817-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6820-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6820-2 | Linux kernel (NVIDIA) vulnerabilities |
Ubuntu USN |
USN-6821-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6821-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6821-3 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-6821-4 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-6828-1 | Linux kernel (Intel IoTG) vulnerabilities |
Ubuntu USN |
USN-6871-1 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-6878-1 | Linux kernel (Oracle) vulnerabilities |
Ubuntu USN |
USN-6892-1 | Linux kernel (IBM) vulnerabilities |
Ubuntu USN |
USN-6896-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6896-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6896-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6896-4 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6896-5 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6919-1 | Linux kernel vulnerabilities |
References
History
Fri, 22 Nov 2024 12:00:00 +0000
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Wed, 06 Nov 2024 08:15:00 +0000
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| Metrics |
ssvc
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-05-04T08:58:08.974Z
Reserved: 2024-02-19T14:20:24.183Z
Link: CVE-2024-26859
Updated: 2024-08-02T00:14:13.698Z
Status : Awaiting Analysis
Published: 2024-04-17T11:15:08.893
Modified: 2024-11-21T09:03:14.013
Link: CVE-2024-26859
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Debian DSA
Ubuntu USN