From: Kristina Martsenko <kristina.martsenko@arm.com>
Date: Fri, 9 Jun 2017 16:35:54 +0100
Subject: arm64: mm: print file name of faulting vma
Git-commit: 83016b204225d69516de3d57489783fafd6a0ecc
Patch-mainline: v4.13-rc1
References: fate#326419

Print out the name of the file associated with the vma that faulted.
This is usually the executable or shared library name. We already print
out the task name, but also printing the library name is useful for
pinpointing bugs to libraries.

Also print the base address and size of the vma, which together with the
PC (printed by __show_regs) gives the offset into the library.

Fault prints now look like:
test[2361]: unhandled level 2 translation fault (11) at 0x00000012, esr 0x92000006, in libfoo.so[ffffa0145000+1000]

This is already done on x86, for more details see commit 03252919b798
("x86: print which shared library/executable faulted in segfault etc.
messages v3").

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 arch/arm64/mm/fault.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index b5a1605398b7..ad7c9c94d379 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -261,9 +261,11 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr,
 
 	if (unhandled_signal(tsk, sig) && show_unhandled_signals_ratelimited()) {
 		inf = esr_to_fault_info(esr);
-		pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n",
+		pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x",
 			tsk->comm, task_pid_nr(tsk), inf->name, sig,
 			addr, esr);
+		print_vma_addr(KERN_CONT ", in ", regs->pc);
+		pr_cont("\n");
 		__show_regs(regs);
 	}
 
-- 
2.19.1