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parisc/unwind: use copy_from_kernel_nofault()

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I have no idea why get_user() is used there, but we're unwinding the
kernel stack, so we should use copy_from_kernel_nofault().

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Sven Schnelle 2021-09-30 19:26:03 +02:00 committed by Helge Deller
parent 3a4347d82e
commit cf2ec7893f
1 changed files with 2 additions and 1 deletions
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3
arch/parisc/kernel/unwind.c
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@ -302,7 +302,8 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
break;
}
if (get_user(tmp, (unsigned long *)(info->prev_sp - RP_OFFSET)))
if (copy_from_kernel_nofault(&tmp,
(void *)info->prev_sp - RP_OFFSET, sizeof(tmp)))
break;
info->prev_ip = tmp;
sp = info->prev_sp;