From: deller@kernel.org
To: linux-parisc@vger.kernel.org
Subject: [PATCH 7/7] parisc: Show kernel unaligned memory accesses
Date: Tue, 23 Jan 2024 16:59:04 +0100 [thread overview]
Message-ID: <20240123155904.6220-7-deller@kernel.org> (raw)
In-Reply-To: <20240123155904.6220-1-deller@kernel.org>
From: Helge Deller <deller@gmx.de>
Warn if some kernel function triggers unaligned memory accesses.
Signed-off-by: Helge Deller <deller@gmx.de>
---
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
prev parent reply other threads:[~2024-01-23 15:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-23 15:58 [PATCH 1/7] parisc: Use irq_enter_rcu() to fix warning at kernel/context_tracking.c:367 deller
2024-01-23 15:58 ` [PATCH 2/7] parisc: Make RO_DATA page aligned in vmlinux.lds.S deller
2024-01-23 15:59 ` [PATCH 3/7] parisc: Check for valid stride size for cache flushes deller
2024-01-23 15:59 ` [PATCH 4/7] parisc: Prevent hung tasks when printing inventory on serial console deller
2024-01-23 15:59 ` [PATCH 5/7] parisc: Drop unneeded semicolon in parse_tree_node() deller
2024-01-23 15:59 ` [PATCH 6/7] parisc: Fix random data corruption from exception handler deller
2024-01-23 15:59 ` deller [this message]
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