| Date | Sun, 09 Sep 2012 23:42:52 +0100 | From | Ben Hutchings <> | Subject | [ 62/95] drm/radeon: fix use after free in ATRM bios reading code. |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Dave Airlie <airlied@redhat.com>
commit de47a9cd62771e3e78954d855d2304fbad4c5a44 upstream.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=45503
Reported-and-Debugged-by: mlambda@gmail.com Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/gpu/drm/radeon/radeon_atpx_handler.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 13ac63b..98724fc 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -59,8 +59,9 @@ static int radeon_atrm_call(acpi_handle atrm_handle, uint8_t *bios, obj = (union acpi_object *)buffer.pointer; memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length); + len = obj->buffer.length; kfree(buffer.pointer); - return obj->buffer.length; + return len; } bool radeon_atrm_supported(struct pci_dev *pdev)
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