On 07/30/2015 03:25 PM, Andy Lutomirski wrote:
On Thu, Jul 30, 2015 at 11:35 AM, Boris Ostrovsky
<boris.ostrovsky@xxxxxxxxxx> wrote:
[OK] LDT entry 0 has AR 0x0040F200 and limit 0x00000000
[OK] LDT entry 0 is invalid
[RUN] Cross-CPU LDT invalidation
Segmentation fault (core dumped)
That's not good.
Can you backtrace it? (I.e. compite ldt_gdt_32 with -g and load the
core dumb in gdb?) My best guesses are either a signal delivery
failure (although that shouldn't be a problem for 32-bit userspace on
any kernel) or an actual LDT access fault, and the latter would be
interesting.
I haven't been able to reproduce this.
This looks like a userspace bug. Breaks on F18, works fine in F22.
Possibly something about signal handling --- I noticed on F18 I'd get
two SEGV's in a row whereas we should only get one.
Anyway, this is not an issue as far as this thread is concerned.
-boris
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