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authorHeinrich Schuchardt <xypron.glpk@gmx.de>2019-05-11 21:44:59 +0200
committerHeinrich Schuchardt <xypron.glpk@gmx.de>2019-05-12 20:54:22 +0200
commit3b985113be63821c799ae6ee98690f740f49a0e9 (patch)
tree5962f273c5676c18024b7534bd6b13c7bd94f564 /lib
parent8ae39857b93edfe697c223fa2f2edfb39d45c98c (diff)
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efi_loader: infinite recursion notifying events
UEFI SCT uses this call sequence to determine the current TPL level inside notification functions: OldTpl = BS->RaiseTPL(TPL_HIGH_LEVEL); BS->RestoreTPL(OldTpl); In RestoreTPL() we trigger the notification function of queued events. If we do not mark the event as non-queued before calling the notification function, this results in an infinite recursive call sequence. Mark the event as non-queued before entering the notification function. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib')
-rw-r--r--lib/efi_loader/efi_boottime.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index b583ac6..ec6f575 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -181,10 +181,12 @@ static void efi_queue_event(struct efi_event *event, bool check_tpl)
/* Check TPL */
if (check_tpl && efi_tpl >= event->notify_tpl)
return;
+ event->is_queued = false;
EFI_CALL_VOID(event->notify_function(event,
event->notify_context));
+ } else {
+ event->is_queued = false;
}
- event->is_queued = false;
}
/**