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| author | William Lee Irwin III <wli@holomorphy.com> | 2007-12-12 03:56:55 -0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-12-13 16:24:10 -0500 |
| commit | 98934def70b48dac74fac3738b78ab2d1a28edda (patch) | |
| tree | 75d97b7fb0dc47f19ad2ef5521fe69036ddfac60 | |
| parent | da8cadb31b82c9d41fc593c8deab6aa20b162d6b (diff) | |
| download | linux-98934def70b48dac74fac3738b78ab2d1a28edda.tar.gz linux-98934def70b48dac74fac3738b78ab2d1a28edda.tar.bz2 linux-98934def70b48dac74fac3738b78ab2d1a28edda.zip | |
ACPI: video_device_list corruption
The ->cap fields of struct acpi_video_device and struct acpi_video_bus
are 1B each, not 4B. The oversized memset()'s corrupted the subsequent
list_head fields. This resulted in silent corruption without
CONFIG_DEBUG_LIST and BUG's with it. This patch uses sizeof() to pass
the proper bounds to the memset() calls and thereby correct the bugs.
Signed-off-by: William Irwin <wli@holomorphy.com>
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/video.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 44a0d9ba9bd6..bd77e81e81c1 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -577,7 +577,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) struct acpi_video_device_brightness *br = NULL; - memset(&device->cap, 0, 4); + memset(&device->cap, 0, sizeof(device->cap)); if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { device->cap._ADR = 1; @@ -697,7 +697,7 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video) { acpi_handle h_dummy1; - memset(&video->cap, 0, 4); + memset(&video->cap, 0, sizeof(video->cap)); if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { video->cap._DOS = 1; } |