To support unregister SMI handler inside SMI handler itself,
get next node before SMI handler is executed, since LIST_ENTRY that
Link points to may be freed if unregister SMI handler in SMI handler
itself.
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Jiaxin Wu <jiaxin...@intel.com>
Reviewed-by: Ray Ni <ray...@intel.com>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
Signed-off-by: Zhiguang Liu <zhiguang....@intel.com>
---
MdeModulePkg/Core/PiSmmCore/Smi.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Core/PiSmmCore/Smi.c
b/MdeModulePkg/Core/PiSmmCore/Smi.c
index 2985f989c3..3489c130fd 100644
--- a/MdeModulePkg/Core/PiSmmCore/Smi.c
+++ b/MdeModulePkg/Core/PiSmmCore/Smi.c
@@ -134,8 +134,14 @@ SmiManage (
Head = &SmiEntry->SmiHandlers;
- for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
+ for (Link = Head->ForwardLink; Link != Head;) {
SmiHandler = CR (Link, SMI_HANDLER, Link, SMI_HANDLER_SIGNATURE);
+ //
+ // To support unregister SMI handler inside SMI handler itself,
+ // get next node before handler is executed, since LIST_ENTRY that
+ // Link points to may be freed if unregister SMI handler.
+ //
+ Link = Link->ForwardLink;
Status = SmiHandler->Handler (
(EFI_HANDLE)SmiHandler,
--
2.31.1.windows.1
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