https://github.com/torvalds/linux
The commit "drm/exynos: remove exynos_plane_dpms" (d9ea6256) removed the use of the enabled flag, which means that the code may attempt to call win_enable on a NULL crtc. This results in the following oops on Arndale: [ 1.673479] Unable to handle kernel NULL pointer dereference at virtual address 00000368 [ 1.681500] pgd = c0004000 [ 1.684154] [00000368] *pgd=00000000 [ 1.687713] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.693012] Modules linked in: [ 1.696045] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.19.0-07545-g57485fa #1907 [ 1.703524] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) (....) [ 2.014803] [<c02f9cfc>] (exynos_plane_destroy) from [<c02e61b4>] (drm_mode_config_cleanup+0x168/0x20c) [ 2.024178] [<c02e61b4>] (drm_mode_config_cleanup) from [<c02f66fc>] (exynos_drm_load+0xac/0x12c) This patch adds in a check to ensure exynos_crtc is not NULL before it is dereferenced. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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drm/exynos: Check for NULL dereference of crtc
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 1.2 KB |
.mailmap | -rw-r--r-- | 4.9 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 94.0 KB |
Kbuild | -rw-r--r-- | 2.1 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 298.6 KB |
Makefile | -rw-r--r-- | 53.3 KB |
README | -rw-r--r-- | 18.3 KB |
REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...