efifb: prevent null-deref when iterating dmi_list

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The dmi_list array is initialized using gnu designated initializers, and
therefore may contain fewer explicitly defined entries as there are
elements in it. This is because the enum above with M_xyz constants
contains more items than the designated initializer. Those elements not
explicitly initialized are implicitly set to 0.

Now efifb_setup() loops through all these array elements, and performs
a strcmp on each item. For non explicitly initialized elements this will
be a null pointer:

This patch swaps the check order in the if statement, thus checks first
whether dmi_list[i].base is null.

Signed-off-by: James Bates <james.h.bates@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

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James Bates 2013-10-02 18:43:39 +02:00 • committed by Tomi Valkeinen

parent e8ddb0cfa1

commit 55aa42f2e6

1 changed files with 2 additions and 2 deletions

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drivers/video/efifb.c

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