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Fix for rhbz 735437

This commit is contained in:
Josh Boyer 2011-09-07 12:23:33 -04:00
parent 82e8051371
commit 4cf7022846
2 changed files with 40 additions and 1 deletions
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7
kernel.spec
View File

@ -51,7 +51,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be prepended with "0.", so
# for example a 3 here will become 0.3
#
%global baserelease 1
%global baserelease 2
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -720,6 +720,7 @@ Patch12303: dmar-disable-when-ricoh-multifunction.patch
Patch13002: revert-efi-rtclock.patch
Patch13003: efi-dont-map-boot-services-on-32bit.patch
Patch13004: iwlagn-revert-max-aggregate-size.patch
Patch13005: ucvideo-fix-crash-when-linking-entities.patch
Patch20000: utrace.patch
@ -1325,6 +1326,7 @@ ApplyPatch dmar-disable-when-ricoh-multifunction.patch
ApplyPatch revert-efi-rtclock.patch
ApplyPatch efi-dont-map-boot-services-on-32bit.patch
ApplyPatch iwlagn-revert-max-aggregate-size.patch
ApplyPatch ucvideo-fix-crash-when-linking-entities.patch
# utrace.
ApplyPatch utrace.patch
@ -2037,6 +2039,9 @@ fi
# ||----w |
# || ||
%changelog
* Wed Sep 07 2011 Josh Boyer <jwboyer@redhat.com>
- Add patch to fix oops when linking entities in ucvideo (rhbz 735437)
* Fri Sep 02 2011 Dave Jones <davej@redhat.com>
- utrace: s390: fix the compile problem with traps.c (rhbz 735118)

34
ucvideo-fix-crash-when-linking-entities.patch Normal file
View File

@ -0,0 +1,34 @@
The uvc_mc_register_entity() function wrongfully selects the
media_entity associated with a UVC entity when creating links. This
results in access to uninitialized media_entity structures and can hit a
BUG_ON statement in media_entity_create_link(). Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/media/video/uvc/uvc_entity.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
This patch should fix a v3.0 regression that results in a kernel crash as
reported in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637740 and
https://bugzilla.redhat.com/show_bug.cgi?id=735437.
Test results will be welcome.
diff --git a/drivers/media/video/uvc/uvc_entity.c b/drivers/media/video/uvc/uvc_entity.c
index 48fea37..29e2399 100644
--- a/drivers/media/video/uvc/uvc_entity.c
+++ b/drivers/media/video/uvc/uvc_entity.c
@@ -49,7 +49,7 @@ static int uvc_mc_register_entity(struct uvc_video_chain *chain,
if (remote == NULL)
return -EINVAL;
- source = (UVC_ENTITY_TYPE(remote) != UVC_TT_STREAMING)
+ source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)
? (remote->vdev ? &remote->vdev->entity : NULL)
: &remote->subdev.entity;
if (source == NULL)
--
Regards,
Laurent Pinchart