diff options
| author | Jason Wessel <jason.wessel@windriver.com> | 2012-08-10 12:21:15 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:27:57 -0700 |
| commit | fb2ca533f518dabf814c6aab3b7ce3c236959a68 (patch) | |
| tree | 363a7aa5a517a9c2e6e1ab273811b7c40ba2df31 /mm | |
| parent | 531db9f3addc4664300aa14af6130f160150970f (diff) | |
mips,kgdb: fix recursive page fault with CONFIG_KPROBES
commit f0a996eeeda214f4293e234df33b29bec003b536 upstream.
This fault was detected using the kgdb test suite on boot and it
crashes recursively due to the fact that CONFIG_KPROBES on mips adds
an extra die notifier in the page fault handler. The crash signature
looks like this:
kgdbts:RUN bad memory access test
KGDB: re-enter exception: ALL breakpoints killed
Call Trace:
[<807b7548>] dump_stack+0x20/0x54
[<807b7548>] dump_stack+0x20/0x54
The fix for now is to have kgdb return immediately if the fault type
is DIE_PAGE_FAULT and allow the kprobe code to decide what is supposed
to happen.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions