Fix kernel to not to try to unwind functions when crash
happens in userspace.
Without this patch kernel may needlessly crash for userspace faults.
Signed-off-by: Kyle McMartin <kyle@xxxxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 675f1d0..12276c8 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -121,18 +121,19 @@ static void print_fr(char *level, struct pt_regs *regs)
void show_regs(struct pt_regs *regs)
{
- int i;
+ int i, user;
char *level;
unsigned long cr30, cr31;
- level = user_mode(regs) ? KERN_DEBUG : KERN_CRIT;
+ user = user_mode(regs);
+ level = user ? KERN_DEBUG : KERN_CRIT;
print_gr(level, regs);
for (i = 0; i < 8; i += 4)
PRINTREGS(level, regs->sr, "sr", RFMT, i);
- if (user_mode(regs))
+ if (user)
print_fr(level, regs);
cr30 = mfctl(30);
@@ -152,7 +153,8 @@ void show_regs(struct pt_regs *regs)
printk(level);
print_symbol(" RP(r2): %s\n", regs->gr[2]);
- parisc_show_stack(current, NULL, regs);
+ if (!user)
+ parisc_show_stack(current, NULL, regs);
}
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