CVE-2024-43851

/// Technical description

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

soc: xilinx: rename cpu_number1 to dummy_cpu_number

The per cpu variable cpu_number1 is passed to xlnx_event_handler as

argument "dev_id", but it is not used in this function. So drop the

initialization of this variable and rename it to dummy_cpu_number.

This patch is to fix the following call trace when the kernel option

CONFIG_DEBUG_ATOMIC_SLEEP is enabled:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274

in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper/0

preempt_count: 1, expected: 0

CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0 #53

Hardware name: Xilinx Versal vmk180 Eval board rev1.1 (QSPI) (DT)

Call trace:

dump_backtrace+0xd0/0xe0

show_stack+0x18/0x40

dump_stack_lvl+0x7c/0xa0

dump_stack+0x18/0x34

__might_resched+0x10c/0x140

__might_sleep+0x4c/0xa0

__kmem_cache_alloc_node+0xf4/0x168

kmalloc_tra

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References