On Fri, Nov 22, 2019 at 8:00 AM Sasha Levin <sashal@xxxxxxxxxx> wrote:
>
> Hi,
>
> [This is an automated email]
>
> This commit has been processed because it contains a -stable tag.
> The stable tag indicates that it's relevant for the following trees: all
>
> The bot has tested the following trees: v5.3.11, v4.19.84, v4.14.154, v4.9.201, v4.4.201.
>
> v5.3.11: Build OK!
> v4.19.84: Build OK!
Ok, good.
> v4.14.154: Failed to apply! Possible dependencies:
> 6dd0394f5fcd ("media: v4l2-compat-ioctl32: better name userspace pointers")
> fef6cc6b3618 ("media: v4l2-compat-ioctl32: fix several __user annotations")
The fef6cc6b3618 is probably a candidate for backporting (it fixes smatch
and sparse warnings and should have no other effect), the 6dd0394f5fcd
may be a little too big (but also harmless).
The downside of not backporting the patch is that user space code built
with 64-bit time_t would get incorrect data rather than failing with an
error code on older kernels.
I do not expect to see backports of 64-bit time_t support to kernels older
than 4.19, so this probably won't matter much, but in theory it's still
possible that users can run into it.
> v4.9.201: Failed to apply! Possible dependencies:
> 6dd0394f5fcd ("media: v4l2-compat-ioctl32: better name userspace pointers")
> a56bc171598c ("[media] v4l: compat: Prevent allocating excessive amounts of memory")
> ba7ed691dcce ("[media] v4l2-compat-ioctl32: VIDIOC_S_EDID should return all fields on error")
> fb9ffa6a7f7e ("[media] v4l: Add metadata buffer type and format")
> fef6cc6b3618 ("media: v4l2-compat-ioctl32: fix several __user annotations")
>
> v4.4.201: Failed to apply! Possible dependencies:
> 0579e6e3a326 ("doc-rst: linux_tv: remove whitespaces")
> 17defc282fe6 ("Documentation: add meta-documentation for Sphinx and kernel-doc")
> 22cba31bae9d ("Documentation/sphinx: add basic working Sphinx configuration and build")
> 234d549662a7 ("doc-rst: video: use reference for VIDIOC_ENUMINPUT")
> 5377d91f3e88 ("doc-rst: linux_tv DocBook to reST migration (docs-next)")
> 6dd0394f5fcd ("media: v4l2-compat-ioctl32: better name userspace pointers")
> 7347081e8a52 ("doc-rst: linux_tv: simplify references")
> 789818845202 ("doc-rst: audio: Fix some cross references")
> 94fff0dc5333 ("doc-rst: dmx_fcalls: improve man-like format")
> 9e00ffca8cc7 ("doc-rst: querycap: fix troubles on some references")
> af4a4d0db8ab ("doc-rst: linux_tv: Replace reference names to match ioctls")
> c2b66cafdf02 ("[media] v4l: doc: Remove row numbers from tables")
> e6702ee18e24 ("doc-rst: app-pri: Fix a bad reference")
> fb9ffa6a7f7e ("[media] v4l: Add metadata buffer type and format")
>
>
> NOTE: The patch will not be queued to stable trees until it is upstream.
>
> How should we proceed with this patch?
I'm happy to provide a hand-backported version of the patch for the older
kernels if Mauro and Hans think we should do that, otherwise I think it's
we're fine with having it on 4.19+.
Arnd
