Comment 14 for bug 1469214

On Tue, Jul 7, 2015 at 2:37 AM, Colin Ian King
<email address hidden> wrote:
> captured irqbalance segfaulting:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000408f8c in place_irq_in_node (info=0x2c3d0050, data=0x0) at placement.c:145
> 145 if (irq_numa_node(info)->number != -1) {
> (gdb) where
> #0 0x0000000000408f8c in place_irq_in_node (info=0x2c3d0050, data=0x0) at placement.c:145
> #1 0x0000000000405154 in for_each_irq (list=0x2c3df660, cb=0x408f4c <place_irq_in_node>, data=0x0)
> at classify.c:508
> #2 0x000000000040923c in calculate_placement () at placement.c:196
> #3 0x0000000000407800 in main (argc=2, argv=0x7fcd014928) at irqbalance.c:372
>
> (gdb) print info
> $1 = (struct irq_info *) 0x2c3d0050

Suppose info is one address in heap, then it is valid, and the segfault
should be caused by invalid info->numa_node.

Thanks

>
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> in Ubuntu.
> https://bugs.launchpad.net/bugs/1469214
>
> Title:
> HP ProLiant m400 Server crashes with unhandled level 3 translation
> fault
>
> Status in linux package in Ubuntu:
> Triaged
>
> Bug description:
> Running stress-ng on a HP ProLiant m400 server can cause unhandled
> level 3 translations faults:
>
> use stress-ng from git://kernel.ubuntu.com/cking/stress-ng
>
> ./stress-ng --seq 0 -t 60 -v
>
> and after some time this trips the following:
>
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922560] systemd-timesyn[481]: unhandled level 3 translation fault (7) at 0x7fa8ea6008, esr 0x92000007
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922561] pgd = ffffffcfb563f000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922563] [7fa8ea6008] *pgd=0000004fb4f28003, *pud=0000004fb4f28003, *pmd=0000004fb4f38003, *pte=000000001d151c00
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922566]
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922569] CPU: 6 PID: 481 Comm: systemd-timesyn Not tainted 3.19.0-21-generic #21-Ubuntu
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922571] Hardware name: HP ProLiant m400 Server Cartridge (DT)
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922573] task: ffffffcfb4e3b100 ti: ffffffcfb4d2c000 task.ti: ffffffcfb4d2c000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922588] PC is at 0x7fa8d81824
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922589] LR is at 0x7fa8e3b3e4
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922590] pc : [<0000007fa8d81824>] lr : [<0000007fa8e3b3e4>] pstate: 80000000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922591] sp : 0000007ff120d660
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922592] x29: 0000007ff120d660 x28: 0000007fa8f1c000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922594] x27: 0000007fa8f32084 x26: 0000007fa8f32000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922595] x25: 0000007fa8f1d788 x24: 0000007fa8f1d888
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922597] x23: 0000000000000001 x22: 0000007fa8f1faa0
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922599] x21: 0000007ff120d7f0 x20: 0000007ff120d7d0
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922600] x19: 0000007fa8f31000 x18: 0000007fa8f1e000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922602] x17: 0000007fa8e3b3b8 x16: 0000007fa8ea6000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922603] x15: 003b9aca00000000 x14: 00219bbdd0000000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922605] x13: ffffffffaa751223 x12: 0000000000000000
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922607] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922609] x9 : 37333c43484f5e46 x8 : 0000007ff120d818
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922610] x7 : 0000007ff120d8f0 x6 : 0000007ff120d828
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922612] x5 : ffffff80ffffffd0 x4 : 0000007ff120d8c0
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922613] x3 : 0000007ff120d7d0 x2 : 0000007fa8f1faa0
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922615] x1 : 0000000000000001 x0 : 0000000000000064
> Jun 26 14:01:54 ms10-34-proliant kernel: [150297.922616]
>
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