vulnerability

Ubuntu: (Multiple Advisories) (CVE-2024-40906): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Jul 12, 2024
Added
Sep 12, 2024
Modified
Jan 28, 2025

Description

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

net/mlx5: Always stop health timer during driver removal

Currently, if teardown_hca fails to execute during driver removal, mlx5
does not stop the health timer. Afterwards, mlx5 continue with driver
teardown. This may lead to a UAF bug, which results in page fault
Oops[1], since the health timer invokes after resources were freed.

Hence, stop the health monitor even if teardown_hca fails.

[1]
mlx5_core 0000:18:00.0: E-Switch: Unload vfs: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)
mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)
mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)
mlx5_core 0000:18:00.0: E-Switch: cleanup
mlx5_core 0000:18:00.0: wait_func:1155:(pid 1967079): TEARDOWN_HCA(0x103) timeout. Will cause a leak of a command resource
mlx5_core 0000:18:00.0: mlx5_function_close:1288:(pid 1967079): tear_down_hca failed, skip cleanup
BUG: unable to handle page fault for address: ffffa26487064230
PGD 100c00067 P4D 100c00067 PUD 100e5a067 PMD 105ed7067 PTE 0
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G OE ------- --- 6.7.0-68.fc38.x86_64 #1
Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0013.121520200651 12/15/2020
RIP: 0010:ioread32be+0x34/0x60
RSP: 0018:ffffa26480003e58 EFLAGS: 00010292
RAX: ffffa26487064200 RBX: ffff9042d08161a0 RCX: ffff904c108222c0
RDX: 000000010bbf1b80 RSI: ffffffffc055ddb0 RDI: ffffa26487064230
RBP: ffff9042d08161a0 R08: 0000000000000022 R09: ffff904c108222e8
R10: 0000000000000004 R11: 0000000000000441 R12: ffffffffc055ddb0
R13: ffffa26487064200 R14: ffffa26480003f00 R15: ffff904c108222c0
FS: 0000000000000000(0000) GS:ffff904c10800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffa26487064230 CR3: 00000002c4420006 CR4: 00000000007706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:

? __die+0x23/0x70
? page_fault_oops+0x171/0x4e0
? exc_page_fault+0x175/0x180
? asm_exc_page_fault+0x26/0x30
? __pfx_poll_health+0x10/0x10 [mlx5_core]
? __pfx_poll_health+0x10/0x10 [mlx5_core]
? ioread32be+0x34/0x60
mlx5_health_check_fatal_sensors+0x20/0x100 [mlx5_core]
? __pfx_poll_health+0x10/0x10 [mlx5_core]
poll_health+0x42/0x230 [mlx5_core]
? __next_timer_interrupt+0xbc/0x110
? __pfx_poll_health+0x10/0x10 [mlx5_core]
call_timer_fn+0x21/0x130
? __pfx_poll_health+0x10/0x10 [mlx5_core]
__run_timers+0x222/0x2c0
run_timer_softirq+0x1d/0x40
__do_softirq+0xc9/0x2c8
__irq_exit_rcu+0xa6/0xc0
sysvec_apic_timer_interrupt+0x72/0x90


asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:cpuidle_enter_state+0xcc/0x440
? cpuidle_enter_state+0xbd/0x440
cpuidle_enter+0x2d/0x40
do_idle+0x20d/0x270
cpu_startup_entry+0x2a/0x30
rest_init+0xd0/0xd0
arch_call_rest_init+0xe/0x30
start_kernel+0x709/0xa90
x86_64_start_reservations+0x18/0x30
x86_64_start_kernel+0x96/0xa0
secondary_startup_64_no_verify+0x18f/0x19b
---[ end trace 0000000000000000 ]---

Solution(s)

ubuntu-upgrade-linux-image-6-8-0-1010-gkeubuntu-upgrade-linux-image-6-8-0-1011-raspiubuntu-upgrade-linux-image-6-8-0-1012-ibmubuntu-upgrade-linux-image-6-8-0-1012-oemubuntu-upgrade-linux-image-6-8-0-1012-oracleubuntu-upgrade-linux-image-6-8-0-1012-oracle-64kubuntu-upgrade-linux-image-6-8-0-1013-nvidiaubuntu-upgrade-linux-image-6-8-0-1013-nvidia-64kubuntu-upgrade-linux-image-6-8-0-1013-nvidia-lowlatencyubuntu-upgrade-linux-image-6-8-0-1013-nvidia-lowlatency-64kubuntu-upgrade-linux-image-6-8-0-1014-azureubuntu-upgrade-linux-image-6-8-0-1014-azure-fdeubuntu-upgrade-linux-image-6-8-0-1014-gcpubuntu-upgrade-linux-image-6-8-0-1015-awsubuntu-upgrade-linux-image-6-8-0-44-genericubuntu-upgrade-linux-image-6-8-0-44-generic-64kubuntu-upgrade-linux-image-6-8-0-44-lowlatencyubuntu-upgrade-linux-image-6-8-0-44-lowlatency-64kubuntu-upgrade-linux-image-6-8-0-45-genericubuntu-upgrade-linux-image-6-8-0-45-generic-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-22-04ubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-22-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-classicubuntu-upgrade-linux-image-ibm-lts-24-04ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-lowlatency-64k-hwe-22-04ubuntu-upgrade-linux-image-lowlatency-hwe-22-04ubuntu-upgrade-linux-image-nvidiaubuntu-upgrade-linux-image-nvidia-6-8ubuntu-upgrade-linux-image-nvidia-64kubuntu-upgrade-linux-image-nvidia-64k-6-8ubuntu-upgrade-linux-image-nvidia-lowlatencyubuntu-upgrade-linux-image-nvidia-lowlatency-64kubuntu-upgrade-linux-image-oem-22-04ubuntu-upgrade-linux-image-oem-22-04aubuntu-upgrade-linux-image-oem-22-04bubuntu-upgrade-linux-image-oem-22-04cubuntu-upgrade-linux-image-oem-22-04dubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-22-04ubuntu-upgrade-linux-image-virtual-hwe-24-04
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