Alessandro Astone ef38de9217 binder: Gracefully handle BINDER_TYPE_FDA objects with num_fds=0 ... Some android userspace is sending BINDER_TYPE_FDA objects with num_fds=0. Like the previous patch, this is reproducible when playing a video. Before commit 09184ae9b5 BINDER_TYPE_FDA objects with num_fds=0 were 'correctly handled', as in no fixup was performed. After commit 09184ae9b5 we aggregate fixup and skip regions in binder_ptr_fixup structs and distinguish between the two by using the skip_size field: if it's 0, then it's a fixup, otherwise skip. When processing BINDER_TYPE_FDA objects with num_fds=0 we add a skip region of skip_size=0, and this causes issues because now binder_do_deferred_txn_copies will think this was a fixup region. To address that, return early from binder_translate_fd_array to avoid adding an empty skip region. Fixes: 09184ae9b5 ("binder: defer copies of pre-patched txn data") Acked-by: Todd Kjos <tkjos@google.com> Cc: stable <stable@kernel.org> Signed-off-by: Alessandro Astone <ales.astone@gmail.com> Link: https://lore.kernel.org/r/20220415120015.52684-1-ales.astone@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-04-22 17:22:51 +02:00
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binder.c	binder: Gracefully handle BINDER_TYPE_FDA objects with num_fds=0	2022-04-22 17:22:51 +02:00
binder_alloc.c	drivers/android: remove redundant ret variable	2022-02-04 15:40:44 +01:00
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	selinux/stable-5.16 PR 20211101	2021-11-01 21:06:18 -07:00
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