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

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

[Christophe Leroy]

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@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.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

Re: [PATCH v2] powerpc/traps: fix the message printed when stack overflows

[Michael Ellerman]

Christophe Leroy <christophe.leroy@c-s.fr> writes:

> 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@vger.kernel.org>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.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]);

I think you're meant to use task_pid_nr(current) these days.

I fixed it up when applying.

cheers

Re: [v2] powerpc/traps: fix the message printed when stack overflows

[Michael Ellerman]

On Tue, 2019-01-29 at 16:37:55 UTC, Christophe Leroy wrote:
> 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@vger.kernel.org>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/9bf3d3c4e4fd82c7174f4856df372ab2

cheers