drm/panic: Fix qr_code, ensure vmargin is positive

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[ Upstream commit 4fcffb5e5c ]

Depending on qr_code size and screen size, the vertical margin can
be negative, that means there is not enough room to draw the qr_code.

So abort early, to avoid a segfault by trying to draw at negative
coordinates.

Fixes: cb5164ac43 ("drm/panic: Add a QR code panic screen")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20251009122955.562888-4-jfalempe@redhat.com
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jocelyn Falempe 2025-10-09 14:24:50 +02:00 • committed by Greg Kroah-Hartman

parent 9a0daa1738

commit 53e5c5ef2f

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/drm_panic.c

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