TLDRVuln - Cybersecurity Vulnerabilities Made Simple

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_trace+0x28/0x38

__request_percpu_irq+0x74/0x138

xlnx_event_manager_probe+0xf8/0x298

platform_probe+0x68/0xd8