queue-5.0/powerpc-traps-fix-the-message-printed-when-stack-overflows.patch

   1 From 9bf3d3c4e4fd82c7174f4856df372ab2a71005b9 Mon Sep 17 00:00:00 2001
   2 From: Christophe Leroy <christophe.leroy@c-s.fr>
   3 Date: Tue, 29 Jan 2019 16:37:55 +0000
   4 Subject: powerpc/traps: Fix the message printed when stack overflows
   5
   6 From: Christophe Leroy <christophe.leroy@c-s.fr>
   7
   8 commit 9bf3d3c4e4fd82c7174f4856df372ab2a71005b9 upstream.
   9
  10 Today's message is useless:
  11
  12   [   42.253267] Kernel stack overflow in process (ptrval), r1=c65500b0
  13
  14 This patch fixes it:
  15
  16   [   66.905235] Kernel stack overflow in process sh[356], r1=c65560b0
  17
  18 Fixes: ad67b74d2469 ("printk: hash addresses printed with %p")
  19 Cc: stable@vger.kernel.org # v4.15+
  20 Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
  21 [mpe: Use task_pid_nr()]
  22 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
  23 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  24
  25 ---
  26  arch/powerpc/kernel/traps.c |    4 ++--
  27  1 file changed, 2 insertions(+), 2 deletions(-)
  28
  29 --- a/arch/powerpc/kernel/traps.c
  30 +++ b/arch/powerpc/kernel/traps.c
  31 @@ -1542,8 +1542,8 @@ bail:
  32
  33  void StackOverflow(struct pt_regs *regs)
  34  {
  35 -       printk(KERN_CRIT "Kernel stack overflow in process %p, r1=%lx\n",
  36 -              current, regs->gpr[1]);
  37 +       pr_crit("Kernel stack overflow in process %s[%d], r1=%lx\n",
  38 +               current->comm, task_pid_nr(current), regs->gpr[1]);
  39         debugger(regs);
  40         show_regs(regs);
  41         panic("kernel stack overflow");