[next-20190530] Boot failure on PowerPC

[Michael Ellerman]

Sachin Sant <sachinp at linux.vnet.ibm.com> writes:
> Latest next fails to boot with a kernel panic on POWER9.
>
> [   33.689332] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: write_irq_affinity.isra.5+0x15c/0x160
> [   33.689346] CPU: 35 PID: 4907 Comm: irqbalance Not tainted 5.2.0-rc2-next-20190530-autotest-autotest #1
> [   33.689352] Call Trace:
> [   33.689356] [c0000018d974bab0] [c000000000b5328c] dump_stack+0xb0/0xf4 (unreliable)
> [   33.689364] [c0000018d974baf0] [c000000000120694] panic+0x16c/0x408
> [   33.689370] [c0000018d974bb80] [c00000000012010c] __stack_chk_fail+0x2c/0x30
> [   33.689376] [c0000018d974bbe0] [c0000000001b859c] write_irq_affinity.isra.5+0x15c/0x160
> [   33.689383] [c0000018d974bd30] [c0000000004d6f30] proc_reg_write+0x90/0x110
> [   33.689388] [c0000018d974bd60] [c00000000041453c] __vfs_write+0x3c/0x70
> [   33.689394] [c0000018d974bd80] [c000000000418650] vfs_write+0xd0/0x250
> [   33.689399] [c0000018d974bdd0] [c000000000418a2c] ksys_write+0x7c/0x130
> [   33.689405] [c0000018d974be20] [c00000000000b688] system_call+0x5c/0x70
>
> Machine boots till login prompt and then panics few seconds later.
>
> Last known next build was May 24th. Will attempt few builds till May 30 to
> narrow down this problem.

My CI was fine with next-20190529 (9a15d2e3fd03e3).

cheers