um: segv: Save regs only in case of a kernel mode fault

...otherwise me lose user mode regs and the resulting stack trace is useless. Signed-off-by: Richard Weinberger <richard@nod.at>
git-mirror · Jul 20, 2014 · bb6a1b2 · bb6a1b2
1 parent 468f659
commit bb6a1b2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
@@ -206,7 +206,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
 	int is_write = FAULT_WRITE(fi);
 	unsigned long address = FAULT_ADDRESS(fi);
 
-	if (regs)
+	if (!is_user && regs)
 		current->thread.segv_regs = container_of(regs, struct pt_regs, regs);
 
 	if (!is_user && (address >= start_vm) && (address < end_vm)) {