On Fri, 3 Sep 2021 22:57:06 +1000, Nicholas Piggin wrote:
> If a system call is made with a transaction active, the kernel
> immediately aborts it and returns. scv system calls disable irqs even
> earlier in their interrupt handler, and tabort_syscall does not fix this
> up.
>
> This can result in irq soft-mask state being messed up on the next
> kernel entry, and crashing at BUG_ON(arch_irq_disabled_regs(regs)) in
> the kernel exit handlers, or possibly worse.
>
> [...]
Applied to powerpc/fixes.
[1/2] powerpc/64s: system call scv tabort fix for corrupt irq soft-mask state
https://git.kernel.org/powerpc/c/b871895b148256f1721bc565d803860242755a0b
[2/2] selftests/powerpc: Add scv versions of the basic TM syscall tests
https://git.kernel.org/powerpc/c/5379ef2a60431232b9bb01c6d3580b875123d723
cheers
