diff options
| author | Takashi Iwai <[email protected]> | 2023-01-29 09:28:56 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <[email protected]> | 2023-02-10 11:03:37 +0100 |
| commit | 3efc61d95259956db25347e2a9562c3e54546e20 (patch) | |
| tree | 2b1f2ca1237cbe9ee041b7dbc73b6f281adb103f /tools/testing/selftests/bpf/progs/test_autoload.c | |
| parent | 247a631f9c0ffb37ed0786a94cb4c5f2b6fc7ab1 (diff) | |
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 <[email protected]>
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Tested-by: Miko Larsson <[email protected]>
Fixes: 56c134f7f1b5 ("fbdev: Track deferred-I/O pages in pageref struct")
Reviewed-by: Thomas Zimmermann <[email protected]>
Signed-off-by: Thomas Zimmermann <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_autoload.c')
0 files changed, 0 insertions, 0 deletions