drm/xe: Fix possible UAF in guc_exec_queue_process_msg
Store xe_device ahead of processing message as message can be free'd in
some cases.
v2:
- Including missing local changes
v3:
- Resend for CI
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202407231445.rpisd1vA-lkp@intel.com/
Fixes: 55ea73aacf
("drm/xe: Build PM into GuC CT layer")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240724164341.1848954-1-matthew.brost@intel.com
(cherry picked from commit 1a394b4f504f33eac8c38b6f42ba025105c7e869)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
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1 changed files with 3 additions and 1 deletions
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@ -1375,6 +1375,8 @@ static void __guc_exec_queue_process_msg_resume(struct xe_sched_msg *msg)
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static void guc_exec_queue_process_msg(struct xe_sched_msg *msg)
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{
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struct xe_device *xe = guc_to_xe(exec_queue_to_guc(msg->private_data));
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trace_xe_sched_msg_recv(msg);
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switch (msg->opcode) {
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@ -1394,7 +1396,7 @@ static void guc_exec_queue_process_msg(struct xe_sched_msg *msg)
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XE_WARN_ON("Unknown message type");
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}
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xe_pm_runtime_put(guc_to_xe(exec_queue_to_guc(msg->private_data)));
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xe_pm_runtime_put(xe);
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}
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static const struct drm_sched_backend_ops drm_sched_ops = {
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