net/mlx5: Use del_timer_sync in fw reset flow of halting poll

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Use del_timer_sync in fw reset flow of halting poll Substitute del_timer() with del_timer_sync() in fw reset polling deactivation flow, in order to prevent a race condition which occurs when del_timer() is called and timer is deactivated while another process is handling the timer interrupt. A situation that led to the following call trace: RIP: 0010:run_timer_softirq+0x137/0x420 <IRQ> recalibrate_cpu_khz+0x10/0x10 ktime_get+0x3e/0xa0 ? sched_clock_cpu+0xb/0xc0 __do_softirq+0xf5/0x2ea irq_exit_rcu+0xc1/0xf0 sysvec_apic_timer_interrupt+0x9e/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 </IRQ>

References

• https://git.kernel.org/stable/c/502c37b033fab7cde3e95a570af4f073306be45e
• https://git.kernel.org/stable/c/f895ebeb44d09d02674cfdd0cfc2bf687603918c
• https://git.kernel.org/stable/c/2a038dd1d942f8fbc495c58fa592ff24af05f1c2
• https://git.kernel.org/stable/c/3c5193a87b0fea090aa3f769d020337662d87b5e