Merge tag 'ipe-pr-20260925' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipegrafted

Pull IPE fixes from Fan Wu:
 "Two fixes for use-after-free issues found by recent LLM-assisted code
  analysis.

   - move successful policy load auditing under the new policy
     directory's inode lock, preventing a concurrent policy deletion
     from freeing the policy while it is still being audited

   - protect the dm-verity root hash with RCU, preventing policy
     evaluation from racing with root hash replacement during preresume"

* tag 'ipe-pr-20260925' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe:
  ipe: protect the dm-verity root hash with RCU
  ipe: fix use-after-free when auditing a newly loaded policy

1 files changed, 167 insertions, 0 deletions

diff --git a/sound/soc/sof/ops.c b/sound/soc/sof/ops.c
new file mode 100644
index 000000000..74c04dcf4
--- /dev/null
+++ b/sound/soc/sof/ops.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation
+//
+// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
+//
+
+#include <linux/pci.h>
+#include "ops.h"
+
+static
+bool snd_sof_pci_update_bits_unlocked(struct snd_sof_dev *sdev, u32 offset,
+				      u32 mask, u32 value)
+{
+	struct pci_dev *pci = to_pci_dev(sdev->dev);
+	unsigned int old, new;
+	u32 ret = 0;
+
+	pci_read_config_dword(pci, offset, &ret);
+	old = ret;
+	dev_dbg(sdev->dev, "Debug PCIR: %8.8x at  %8.8x\n", old & mask, offset);
+
+	new = (old & ~mask) | (value & mask);
+
+	if (old == new)
+		return false;
+
+	pci_write_config_dword(pci, offset, new);
+	dev_dbg(sdev->dev, "Debug PCIW: %8.8x at  %8.8x\n", value,
+		offset);
+
+	return true;
+}
+
+bool snd_sof_pci_update_bits(struct snd_sof_dev *sdev, u32 offset,
+			     u32 mask, u32 value)
+{
+	guard(spinlock_irqsave)(&sdev->hw_lock);
+	return snd_sof_pci_update_bits_unlocked(sdev, offset, mask, value);
+}
+EXPORT_SYMBOL(snd_sof_pci_update_bits);
+
+bool snd_sof_dsp_update_bits_unlocked(struct snd_sof_dev *sdev, u32 bar,
+				      u32 offset, u32 mask, u32 value)
+{
+	unsigned int old, new;
+	u32 ret;
+
+	ret = snd_sof_dsp_read(sdev, bar, offset);
+
+	old = ret;
+	new = (old & ~mask) | (value & mask);
+
+	if (old == new)
+		return false;
+
+	snd_sof_dsp_write(sdev, bar, offset, new);
+
+	return true;
+}
+EXPORT_SYMBOL(snd_sof_dsp_update_bits_unlocked);
+
+bool snd_sof_dsp_update_bits64_unlocked(struct snd_sof_dev *sdev, u32 bar,
+					u32 offset, u64 mask, u64 value)
+{
+	u64 old, new;
+
+	old = snd_sof_dsp_read64(sdev, bar, offset);
+
+	new = (old & ~mask) | (value & mask);
+
+	if (old == new)
+		return false;
+
+	snd_sof_dsp_write64(sdev, bar, offset, new);
+
+	return true;
+}
+EXPORT_SYMBOL(snd_sof_dsp_update_bits64_unlocked);
+
+/* This is for registers bits with attribute RWC */
+bool snd_sof_dsp_update_bits(struct snd_sof_dev *sdev, u32 bar, u32 offset,
+			     u32 mask, u32 value)
+{
+	guard(spinlock_irqsave)(&sdev->hw_lock);
+	return snd_sof_dsp_update_bits_unlocked(sdev, bar, offset, mask, value);
+}
+EXPORT_SYMBOL(snd_sof_dsp_update_bits);
+
+bool snd_sof_dsp_update_bits64(struct snd_sof_dev *sdev, u32 bar, u32 offset,
+			       u64 mask, u64 value)
+{
+	guard(spinlock_irqsave)(&sdev->hw_lock);
+	return snd_sof_dsp_update_bits64_unlocked(sdev, bar, offset, mask, value);
+}
+EXPORT_SYMBOL(snd_sof_dsp_update_bits64);
+
+static
+void snd_sof_dsp_update_bits_forced_unlocked(struct snd_sof_dev *sdev, u32 bar,
+					     u32 offset, u32 mask, u32 value)
+{
+	unsigned int old, new;
+	u32 ret;
+
+	ret = snd_sof_dsp_read(sdev, bar, offset);
+
+	old = ret;
+	new = (old & ~mask) | (value & mask);
+
+	snd_sof_dsp_write(sdev, bar, offset, new);
+}
+
+/* This is for registers bits with attribute RWC */
+void snd_sof_dsp_update_bits_forced(struct snd_sof_dev *sdev, u32 bar,
+				    u32 offset, u32 mask, u32 value)
+{
+	guard(spinlock_irqsave)(&sdev->hw_lock);
+	snd_sof_dsp_update_bits_forced_unlocked(sdev, bar, offset, mask, value);
+}
+EXPORT_SYMBOL(snd_sof_dsp_update_bits_forced);
+
+/**
+ * snd_sof_dsp_panic - handle a received DSP panic message
+ * @sdev: Pointer to the device's sdev
+ * @offset: offset of panic information
+ * @non_recoverable: the panic is fatal, no recovery will be done by the caller
+ */
+void snd_sof_dsp_panic(struct snd_sof_dev *sdev, u32 offset, bool non_recoverable)
+{
+	/*
+	 * if DSP is not ready and the dsp_oops_offset is not yet set, use the
+	 * offset from the panic message.
+	 */
+	if (!sdev->dsp_oops_offset)
+		sdev->dsp_oops_offset = offset;
+
+	/*
+	 * Print warning if the offset from the panic message differs from
+	 * dsp_oops_offset
+	 */
+	if (sdev->dsp_oops_offset != offset)
+		dev_warn(sdev->dev,
+			 "%s: dsp_oops_offset %zu differs from panic offset %u\n",
+			 __func__, sdev->dsp_oops_offset, offset);
+
+	/*
+	 * Set the fw_state to crashed only in case of non recoverable DSP panic
+	 * event.
+	 * Use different message within the snd_sof_dsp_dbg_dump() depending on
+	 * the non_recoverable flag.
+	 */
+	sdev->dbg_dump_printed = false;
+	if (non_recoverable) {
+		snd_sof_dsp_dbg_dump(sdev, "DSP panic!",
+				     SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
+		sof_set_fw_state(sdev, SOF_FW_CRASHED);
+		sof_fw_trace_fw_crashed(sdev);
+	} else {
+		snd_sof_dsp_dbg_dump(sdev,
+				     "DSP panic (recovery will be attempted)",
+				     SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
+	}
+}
+EXPORT_SYMBOL(snd_sof_dsp_panic);