From: Helge Deller <deller@xxxxxx>
Warn if some kernel function triggers unaligned memory accesses.
Signed-off-by: Helge Deller <deller@xxxxxx>
---
arch/parisc/kernel/unaligned.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index c520e551a165..95a2741f26f3 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -399,6 +399,13 @@ void handle_unaligned(struct pt_regs *regs)
if (!unaligned_enabled)
goto force_sigbus;
+ } else {
+ static DEFINE_RATELIMIT_STATE(kernel_ratelimit, 5 * HZ, 5);
+ if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
+ __ratelimit(&kernel_ratelimit))
+ pr_warn("Kernel: unaligned access to " RFMT " in %pS "
+ "(iir " RFMT ")\n",
+ regs->ior, (void *)regs->iaoq[0], regs->iir);
}
/* handle modification - OK, it's ugly, see the instruction manual */
--
2.43.0
