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| author |   Takashi Iwai <tiwai@suse.de> | 2023-01-29 09:28:56 +0100 |
|---|---|---|
| committer |   Thomas Zimmermann <tzimmermann@suse.de> | 2023-02-10 11:03:37 +0100 |
| commit | 3efc61d95259956db25347e2a9562c3e54546e20 (patch) | |
| tree | 2b1f2ca1237cbe9ee041b7dbc73b6f281adb103f /scripts/generate_rust_analyzer.py | |
| parent | drm/vc4: crtc: Increase setup cost in core clock calculation to handle extreme reduced blanking (diff) | |
| download | wireguard-linux-3efc61d95259956db25347e2a9562c3e54546e20.tar.xz wireguard-linux-3efc61d95259956db25347e2a9562c3e54546e20.zip | |
fbdev: Fix invalid page access after closing deferred I/O devices
When a fbdev with deferred I/O is once opened and closed, the dirty
pages still remain queued in the pageref list, and eventually later
those may be processed in the delayed work. This may lead to a
corruption of pages, hitting an Oops.
This patch makes sure to cancel the delayed work and clean up the
pageref list at closing the device for addressing the bug. A part of
the cleanup code is factored out as a new helper function that is
called from the common fb_release().
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Miko Larsson <mikoxyzzz@gmail.com>
Fixes: 56c134f7f1b5 ("fbdev: Track deferred-I/O pages in pageref struct")
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230129082856.22113-1-tiwai@suse.de
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions