linux-kernel - [PATCH v2] powerpc/traps: fix the message printed when stack overflows

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Message-Id: <5aa3c84a675405ac99382a5893406ef7e8dfd455.1548779831.git.christophe.leroy@c-s.fr>
Date:   Tue, 29 Jan 2019 16:37:55 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2] powerpc/traps: fix the message printed when stack
 overflows

Today's message is useless:

[   42.253267] Kernel stack overflow in process (ptrval), r1=c65500b0

This patch fixes it:

[   66.905235] Kernel stack overflow in process sh[356], r1=c65560b0

Fixes: ad67b74d2469 ("printk: hash addresses printed with %p")
Cc: <stable@...r.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 v2: make checkpatch happy :)

 arch/powerpc/kernel/traps.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 5e917a84f949..a3dc6872d5aa 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1535,8 +1535,8 @@ void alignment_exception(struct pt_regs *regs)
 
 void StackOverflow(struct pt_regs *regs)
 {
-	printk(KERN_CRIT "Kernel stack overflow in process %p, r1=%lx\n",
-	       current, regs->gpr[1]);
+	pr_crit("Kernel stack overflow in process %s[%d], r1=%lx\n",
+		current->comm, current->pid, regs->gpr[1]);
 	debugger(regs);
 	show_regs(regs);
 	panic("kernel stack overflow");
-- 
2.13.3