android_kernel_motorola_sm6375/drivers/android
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Todd Kjos aa2c274c27 binder: make sure fd closes complete
commit 5fdb55c1ac9585eb23bb2541d5819224429e103d upstream.

During BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object
cleanup may close 1 or more fds. The close operations are
completed using the task work mechanism -- which means the thread
needs to return to userspace or the file object may never be
dereferenced -- which can lead to hung processes.

Force the binder thread back to userspace if an fd is closed during
BC_FREE_BUFFER handling.

Fixes: 80cd795630 ("binder: fix use-after-free due to ksys_close() during fdget()")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Martijn Coenen <maco@android.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Todd Kjos <tkjos@google.com>
Link: https://lore.kernel.org/r/20210830195146.587206-1-tkjos@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-30 10:09:21 +02:00
..
binder.c binder: make sure fd closes complete 2021-09-30 10:09:21 +02:00
binder_alloc.c binder: add flag to clear buffer on txn complete 2020-12-30 11:51:35 +01:00
binder_alloc.h binder: add flag to clear buffer on txn complete 2020-12-30 11:51:35 +01:00
binder_alloc_selftest.c
binder_internal.h
binder_trace.h
binderfs.c
Kconfig
Makefile