Blame SOURCES/0001-Avoid-RADEONLeaveVT_KMS-after-we-left-the-VT.patch
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From 779bafa175e6b47da086d84324f95cedd4dc487c Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Thu, 23 May 2019 16:26:15 +0200
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Subject: [PATCH] Avoid RADEONLeaveVT_KMS() after we left the VT
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RADEONLeaveVT_KMS() will un-reference its all-black FB in a timer, but
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if we end calling RADEONLeaveVT_KMS() twice in a row, we may try to
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access those after they've been just freed up, and crash.
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Return early in RADEONLeaveVT_KMS() if the VT semaphore is unset.
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Bugzilla: https://bugzilla.redhat.com/1674474
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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---
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src/radeon_kms.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/src/radeon_kms.c b/src/radeon_kms.c
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index ff4f8dcf..0d4d2ef4 100644
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--- a/src/radeon_kms.c
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+++ b/src/radeon_kms.c
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@@ -2624,6 +2624,9 @@ void RADEONLeaveVT_KMS(ScrnInfoPtr pScrn)
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xf86DrvMsgVerb(pScrn->scrnIndex, X_INFO, RADEON_LOGLEVEL_DEBUG,
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"RADEONLeaveVT_KMS\n");
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+ if (xf86ScreenToScrn(pScreen)->vtSema)
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+ return;
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+
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if (!info->r600_shadow_fb) {
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RADEONEntPtr pRADEONEnt = RADEONEntPriv(pScrn);
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xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
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--
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2.21.0
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