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linux/drivers/android
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Todd Kjos 5fdb55c1ac binder: make sure fd closes complete 
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>
History 2021-09-14 09:02:13 +02:00
..
binder.c binder: make sure fd closes complete 2021-09-14 09:02:13 +02:00
binder_alloc.c binder: tell userspace to dump current backtrace when detected oneway spamming 2021-04-10 10:52:04 +02:00
binder_alloc.h binder: tell userspace to dump current backtrace when detected oneway spamming 2021-04-10 10:52:04 +02:00
binder_alloc_selftest.c binder: print warnings when detecting oneway spamming. 2020-09-03 18:24:41 +02:00
binder_internal.h binder: fix freeze race 2021-09-14 08:46:08 +02:00
binder_trace.h binder: add trace at free transaction. 2020-11-11 08:20:44 +01:00
binderfs.c binderfs: add support for feature files 2021-07-21 13:46:36 +02:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00