The patch titled
ia64: kprobes: fixup the pagefault exception caused by probehandlers
has been added to the -mm tree. Its filename is
ia64-kprobes-fixup-the-pagefault-exception-caused-by-probehandlers.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ia64: kprobes: fixup the pagefault exception caused by probehandlers
From: Keshavamurthy Anil S <anil.s.keshavamurthy@xxxxxxxxx>
If the user-specified kprobe handler causes the page fault when accessing
user space address, fixup this fault since do_page_fault() should not
continue as the kprobe handler are run with preemption disabled.
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/ia64/kernel/kprobes.c | 6 ++++++
1 files changed, 6 insertions(+)
diff -puN arch/ia64/kernel/kprobes.c~ia64-kprobes-fixup-the-pagefault-exception-caused-by-probehandlers arch/ia64/kernel/kprobes.c
--- a/arch/ia64/kernel/kprobes.c~ia64-kprobes-fixup-the-pagefault-exception-caused-by-probehandlers
+++ a/arch/ia64/kernel/kprobes.c
@@ -768,6 +768,12 @@ static int __kprobes kprobes_fault_handl
*/
if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
return 1;
+ /*
+ * In case the user-specified fault handler returned
+ * zero, try to fix up.
+ */
+ if (ia64_done_with_exception(regs))
+ return 1;
/*
* Let ia64_do_page_fault() fix it.
_
Patches currently in -mm which might be from anil.s.keshavamurthy@xxxxxxxxx are
ia64-kprobes-fixup-the-pagefault-exception-caused-by-probehandlers.patch
kprobes-make-kprobe-modules-more-portable-update.patch
kprobes-handle-symbol-resolution-when-modulesymbol-is-specified.patch
kprobes-handle-symbol-resolution-when-modulesymbol-is-specified-tidy.patch
add-regs_return_value-helper.patch
-
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