commit 7903d4f5e1dec53963cba9b1bc472a76a3532e07 upstream.
We use well known standard names for functions that have name, such as
I2C, SPI, SPDIF, etc..
Fix the function name of SPDIF, which was named OWA (One Wire Audio)
based on Allwinner datasheets.
Fixes: 4730f33f0d ("pinctrl: sunxi: add allwinner A83T PIO controller
support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 97ba26b8a9343008504d4e3a87d212bc07b05212 upstream.
The nand_groups table uses different names for the NAND DQS pins than
the GROUP() definition in meson8b_cbus_groups (nand_dqs_0 vs nand_dqs0).
This prevents using the NAND DQS pins in the devicetree.
Fix this by ensuring that the GROUP() definition and the
meson8b_cbus_groups use the same name for these pins.
Fixes: 0fefcb6876 ("pinctrl: Add support for Meson8b")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 58439280f84e6b39fd7d61f25ab30489c1aaf0a9 upstream.
PINMUX_IPSR_MSEL() macro invocation for the TX2 signal has apparently wrong
1st argument -- most probably a result of cut&paste programming...
Fixes: 5088451962 ("pinctrl: sh-pfc: r8a7791 PFC support")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 425fffd886bae3d127a08fa6a17f2e31e24ed7ff upstream.
Currently, inputting the following command will succeed but actually the
value will be truncated:
# echo 0x12ffffffff > /proc/sys/net/ipv4/tcp_notsent_lowat
This is not friendly to the user, so instead, we should report error
when the value is larger than UINT_MAX.
Fixes: e7d316a02f68 ("sysctl: handle error writing UINT_MAX to u32 fields")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Cc: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5380e5644afbba9e3d229c36771134976f05c91e upstream.
I saw some very confusing sysctl output on my system:
# cat /proc/sys/net/core/xfrm_aevent_rseqth
-2
# cat /proc/sys/net/core/xfrm_aevent_etime
-10
# cat /proc/sys/net/ipv4/tcp_notsent_lowat
-4294967295
Because we forget to set the *negp flag in proc_douintvec, so it will
become a garbage value.
Since the value related to proc_douintvec is always an unsigned integer,
so we can set *negp to false explictily to fix this issue.
Fixes: e7d316a02f68 ("sysctl: handle error writing UINT_MAX to u32 fields")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Cc: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8fbcfeb8a9cc803464d6c166e7991913711c612c upstream.
mac80211_hwsim initializes a hrtimer with clockid
CLOCK_MONOTONIC_RAW. That's not supported.
Use CLOCK_MONOTONIC instead.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7cf916bd639bd26db7214f2205bccdb4b9306256 upstream.
The current definition is wrong. This breaks my upcoming
Aspeed virtual hub driver.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b3b51417d0af63fb9a06662dc292200aed9ea53f upstream.
The usbip stack dynamically allocates the transfer_buffer and
setup_packet of each urb that got generated by the tcp to usb stub code.
As these pointers are always used only once we will set them to NULL
after use. This is done likewise to the free_urb code in vudc_dev.c.
This patch fixes double kfree situations where the usbip remote side
added the URB_FREE_BUFFER.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 6836796de4019944f4ba4c99a360e8250fd2e735 upstream.
The USB core and sysfs will attempt to enumerate certain parameters
which are unsupported by the au0828 - causing inconsistent behavior
and sometimes causing the chip to reset. Avoid making these calls.
This problem manifested as intermittent cases where the au8522 would
be reset on analog video startup, in particular when starting up ALSA
audio streaming in parallel - the sysfs entries created by
snd-usb-audio on streaming startup would result in unsupported control
messages being sent during tuning which would put the chip into an
unknown state.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fd90f73a9925f248d696bde1cfc836d9fda5570d upstream.
Added the USB serial device ID for the CEL ZigBee EM3588
radio stick.
Signed-off-by: Jeremie Rapin <rapinj@gmail.com>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 04fb365c453e14ff9e8a28f1c46050d920a27a4a upstream.
%p will leak kernel pointers, so let's not expose the information on
dmesg and instead use %pK. %pK will only show the actual addresses if
explicitly enabled under /proc/sys/kernel/kptr_restrict.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 9e52b32567126fe146f198971364f68d3bc5233f upstream.
Always try to parse an address, since kstrtoul() will safely fail when
given a symbol as input. If that fails (which will be the case for a
symbol), try to parse a symbol instead.
This allows creating a probe such as:
p:probe/vlan_gro_receive 8021q:vlan_gro_receive+0
Which is necessary for this command to work:
perf probe -m 8021q -a vlan_gro_receive
Link: http://lkml.kernel.org/r/fd72d666f45b114e2c5b9cf7e27b91de1ec966f1.1498122881.git.sd@queasysnail.net
Fixes: 413d37d1e ("tracing: Add kprobe-based event tracer")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[Not upstream as that would take 34+ patches]
We've got reported a BUG in do_try_to_free_pages():
BUG: unable to handle kernel paging request at ffff8ffffff28990
IP: [<ffffffff8119abe0>] do_try_to_free_pages+0x140/0x490
PGD 0
Oops: 0000 [#1] SMP
megaraid_sas sg scsi_mod efivarfs autofs4
Supported: No, Unsupported modules are loaded
Workqueue: kacpi_hotplug acpi_hotplug_work_fn
task: ffff88ffd0d4c540 ti: ffff88ffd0e48000 task.ti: ffff88ffd0e48000
RIP: 0010:[<ffffffff8119abe0>] [<ffffffff8119abe0>] do_try_to_free_pages+0x140/0x490
RSP: 0018:ffff88ffd0e4ba60 EFLAGS: 00010206
RAX: 000006fffffff900 RBX: 00000000ffffffff RCX: ffff88fffff29000
RDX: 000000ffffffff00 RSI: 0000000000000003 RDI: 00000000024200c8
RBP: 0000000001320122 R08: 0000000000000000 R09: ffff88ffd0e4bbac
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88ffd0e4bae0
R13: 0000000000000e00 R14: ffff88fffff2a500 R15: ffff88fffff2b300
FS: 0000000000000000(0000) GS:ffff88ffe6440000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8ffffff28990 CR3: 0000000001c0a000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
00000002db570a80 024200c80000001e ffff88fffff2b300 0000000000000000
ffff88fffffd5700 ffff88ffd0d4c540 ffff88ffd0d4c540 ffffffff0000000c
0000000000000000 0000000000000040 00000000024200c8 ffff88ffd0e4bae0
Call Trace:
[<ffffffff8119afea>] try_to_free_pages+0xba/0x170
[<ffffffff8118cf2f>] __alloc_pages_nodemask+0x53f/0xb20
[<ffffffff811d39ff>] alloc_pages_current+0x7f/0x100
[<ffffffff811e2232>] migrate_pages+0x202/0x710
[<ffffffff815dadaa>] __offline_pages.constprop.23+0x4ba/0x790
[<ffffffff81463263>] memory_subsys_offline+0x43/0x70
[<ffffffff8144cbed>] device_offline+0x7d/0xa0
[<ffffffff81392fa2>] acpi_bus_offline+0xa5/0xef
[<ffffffff81394a77>] acpi_device_hotplug+0x21b/0x41f
[<ffffffff8138dab7>] acpi_hotplug_work_fn+0x1a/0x23
[<ffffffff81093cee>] process_one_work+0x14e/0x410
[<ffffffff81094546>] worker_thread+0x116/0x490
[<ffffffff810999ed>] kthread+0xbd/0xe0
[<ffffffff815e4e7f>] ret_from_fork+0x3f/0x70
This translates to the loop in shrink_zone():
classzone_idx = requested_highidx;
while (!populated_zone(zone->zone_pgdat->node_zones +
classzone_idx))
classzone_idx--;
where no zone is populated, so classzone_idx becomes -1 (in RBX).
Added debugging output reveals that we enter the function with
sc->gfp_mask == GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE
requested_highidx = gfp_zone(sc->gfp_mask) == 2 (ZONE_NORMAL)
Inside the for loop, however:
gfp_zone(sc->gfp_mask) == 3 (ZONE_MOVABLE)
This means we have gone through this branch:
if (buffer_heads_over_limit)
sc->gfp_mask |= __GFP_HIGHMEM;
This changes the gfp_zone() result, but requested_highidx remains unchanged.
On nodes where the only populated zone is movable, the inner while loop will
check only lower zones, which are not populated, and underflow classzone_idx.
To sum up, the bug occurs in configurations with ZONE_MOVABLE (such as when
booted with the movable_node parameter) and only in situations when
buffer_heads_over_limit is true, and there's an allocation with __GFP_MOVABLE
and without __GFP_HIGHMEM performing direct reclaim.
This patch makes sure that classzone_idx starts with the correct zone.
Mainline has been affected in versions 4.6 and 4.7, but the culprit commit has
been also included in stable trees.
In mainline, this has been fixed accidentally as part of 34-patch series (plus
follow-up fixes) "Move LRU page reclaim from zones to nodes", which makes the
mainline commit unsuitable for stable backport, unfortunately.
Fixes: 7bf52fb891b6 ("mm: vmscan: reclaim highmem zone if buffer_heads is over limit")
Obsoleted-by: b2e18757f2c9 ("mm, vmscan: begin reclaiming pages on a per-node basis")
Debugged-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b4dfd8e92956b396d3438212bc9a0be6267b8b34 upstream.
This fixes Ethernet on D-Link DIR-885L with BCM47094 SoC. Felix reported
similar fix was needed for his BCM4709 device (Buffalo WXR-1900DHP?).
I tested this for regressions on BCM4706, BCM4708A0 and BCM47081A0.
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 6265539776a0810b7ce6398c27866ddb9c6bd154 upstream.
The driver_override implementation is susceptible to race condition when
different threads are reading vs storing a different driver override.
Add locking to avoid race condition.
Fixes: 3d713e0e38 ("driver core: platform: add device binding path 'driver_override'")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Salido <salidoa@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 629e014bb8349fcf7c1e4df19a842652ece1c945 upstream.
Currently we just stash anything we got into file->f_flags, and the
report it in fcntl(F_GETFD). This patch just clears out all unknown
flags so that we don't pass them to the fs or report them.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 80f18379a7c350c011d30332658aa15fe49a8fa5 upstream.
Add a central define for all valid open flags, and use it in the uniqueness
check.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Allows a binder node to specify whether it wants to
inherit real-time scheduling policy from a caller.
Change-Id: I375b6094bf441c19f19cba06d5a6be02cd07d714
Signed-off-by: Martijn Coenen <maco@android.com>
By raising the priority of a thread selected for
a transaction *before* we wake it up.
Delay restoring the priority when doing a reply
until after we wake-up the process receiving
the reply.
Change-Id: Ic332e4e0ed7d2d3ca6ab1034da4629c9eadd3405
Signed-off-by: Martijn Coenen <maco@google.com>
This change adds flags to flat_binder_object.flags
to allow indicating a minimum scheduling policy for
the node. It also clarifies the valid value range
for the priority bits in the flags.
Internally, we use the priority map that the kernel
uses, e.g. [0..99] for real-time policies and [100..139]
for the SCHED_NORMAL/SCHED_BATCH policies.
Bug: 34461621
Bug: 37293077
Change-Id: I12438deecb53df432da18c6fc77460768ae726d2
Signed-off-by: Martijn Coenen <maco@google.com>
Instead of pushing new transactions to the process
waitqueue, select a thread that is waiting on proc
work to handle the transaction. This will make it
easier to improve priority inheritance in future
patches, by setting the priority before we wake up
a thread.
If we can't find a waiting thread, submit the work
to the proc waitqueue instead as we did previously.
Change-Id: I23cbfcca867bed7b86007e22137d0a8fad4b4001
Signed-off-by: Martijn Coenen <maco@google.com>
Removes the process waitqueue, so that threads
can only wait on the thread waitqueue. Whenever
there is process work to do, pick a thread and
wake it up.
This also fixes an issue with using epoll(),
since we no longer have to block on different
waitqueues.
Bug: 34461621
Change-Id: I2950b9de6fa078ee72d53c667a03cbaf587f0849
Signed-off-by: Martijn Coenen <maco@google.com>
(from https://patchwork.kernel.org/patch/9817765/)
A race existed where one thread could register
a death notification for a node, while another
thread was cleaning up that node and sending
out death notifications for its references,
causing simultaneous access to ref->death
because different locks were held.
Test: boots, manual testing
Change-Id: Iff73312f34f70374f417beba4c4c82dd33cac119
Signed-off-by: Martijn Coenen <maco@google.com>
(from https://patchwork.kernel.org/patch/9817761/)
When printing transactions there were several race conditions
that could cause a stale pointer to be deferenced. Fixed by
reading the pointer once and using it if valid (which is
safe). The transaction buffer also needed protection via proc
lock, so it is only printed if we are holding the correct lock.
Bug: 36650912
Test: tested manually
Change-Id: I78240f99cc1a070d70a841c0d84d4306e2fd528d
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817771/)
Use proc->outer_lock to protect the binder_ref structure.
The outer lock allows functions operating on the binder_ref
to do nested acquires of node and inner locks as necessary
to attach refs to nodes atomically.
Binder refs must never be accesssed without holding the
outer lock.
Change-Id: Icf6add0eddf70473b39239960b2d9a524775b53a
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817763/)
Use the inner lock to protect thread accounting fields in
proc structure: max_threads, requested_threads,
requested_threads_started and ready_threads.
Change-Id: I5a17eb68812702f803d4e2806e7887de0b3af18e
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817779/)
This makes future changes to priority inheritance
easier, since we want to be able to look at a thread's
transaction stack when selecting a thread to inherit
priority for.
It also allows us to take just a single lock in a
few paths, where we used to take two in succession.
Change-Id: Idb1b6e9faa5c669978b2b3011fe326be8aece586
Signed-off-by: Martijn Coenen <maco@google.com>
(from https://patchwork.kernel.org/patch/9817775/)
proc->threads will need to be accessed with higher
locks of other processes held so use proc->inner_lock
to protect it. proc->tmp_ref now needs to be protected
by proc->inner_lock.
Change-Id: I176cfeca16bf7c9b34b428c16405f93db81d2ff8
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817783/)
When locks for binder_ref handling are added, proc->nodes
will need to be modified while holding the outer lock
Change-Id: I17b39e981c55130c14a62fe49900eceff6e3642b
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817769/)
node->node_lock is used to protect elements of node. No
need to acquire for fields that are invariant: debug_id,
ptr, cookie.
Change-Id: Ib7738e52fa7689767f17136e18cc05ff548b5717
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817769/)
The todo lists in the proc, thread, and node structures
are accessed by other procs/threads to place work
items on the queue.
The todo lists are protected by the new proc->inner_lock.
No locks should ever be nested under these locks. As the
name suggests, an outer lock will be introduced in
a later patch.
Change-Id: I7720bacf5ebae4af177e22fcab0900d54c94c11a
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817789/)
For correct behavior we need to hold the inner lock when
dequeuing and processing node work in binder_thread_read.
We now hold the inner lock when we enter the switch statement
and release it after processing anything that might be
affected by other threads.
We also need to hold the inner lock to protect the node
weak/strong ref tracking fields as long as node->proc
is non-NULL (if it is NULL then we are guaranteed that
we don't have any node work queued).
This means that other functions that manipulate these fields
must hold the inner lock. Refactored these functions to use
the inner lock.
Change-Id: I02c5cfdd3ab6dadea7f07f2a275faf3e27be77ad
Test: tested manually
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817791/)
There are 3 main spinlocks which must be acquired in this
order:
1) proc->outer_lock : protects most fields of binder_proc,
binder_thread, and binder_ref structures. binder_proc_lock()
and binder_proc_unlock() are used to acq/rel.
2) node->lock : protects most fields of binder_node.
binder_node_lock() and binder_node_unlock() are
used to acq/rel
3) proc->inner_lock : protects the thread and node lists
(proc->threads, proc->nodes) and all todo lists associated
with the binder_proc (proc->todo, thread->todo,
proc->delivered_death and node->async_todo).
binder_inner_proc_lock() and binder_inner_proc_unlock()
are used to acq/rel
Any lock under procA must never be nested under any lock at the same
level or below on procB.
Functions that require a lock held on entry indicate which lock
in the suffix of the function name:
foo_olocked() : requires node->outer_lock
foo_nlocked() : requires node->lock
foo_ilocked() : requires proc->inner_lock
foo_iolocked(): requires proc->outer_lock and proc->inner_lock
foo_nilocked(): requires node->lock and proc->inner_lock
Change-Id: Ied42674486092a0e3bdde64356e45b2494844558
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817795/)
When obtaining a node via binder_get_node(),
binder_get_node_from_ref() or binder_new_node(),
increment node->tmp_refs to take a
temporary reference on the node to ensure the node
persists while being used. binder_put_node() must
be called to remove the temporary reference.
Change-Id: I962b39d5cd80b2d7e4786bb87236ede7914e2db7
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817781/)
Once locks are added, binder_ref's will only be accessed
safely with the proc lock held. Refactor the inc/dec paths
to make them atomic with the binder_get_ref* paths and
node inc/dec. For example, instead of:
ref = binder_get_ref(proc, handle, strong);
...
binder_dec_ref(ref, strong);
we now have:
ret = binder_dec_ref_for_handle(proc, handle, strong, &rdata);
Since the actual ref is no longer exposed to callers, a
new struct binder_ref_data is introduced which can be used
to return a copy of ref state.
Change-Id: I7de22107f8ebc967cee63251d584fceb4ea56250
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817787/)
binder_thread and binder_proc may be accessed by other
threads when processing transaction. Therefore they
must be prevented from being freed while a transaction
is in progress that references them.
This is done by introducing a temporary reference
counter for threads and procs that indicates that the
object is in use and must not be freed. binder_thread_dec_tmpref()
and binder_proc_dec_tmpref() are used to decrement
the temporary reference.
It is safe to free a binder_thread if there
is no reference and it has been released
(indicated by thread->is_dead).
It is safe to free a binder_proc if it has no
remaining threads and no reference.
A spinlock is added to the binder_transaction
to safely access and set references for t->from
and for debug code to safely access t->to_thread
and t->to_proc.
Change-Id: I0a00a0294c3e93aea8b3f141c6f18e77ad244078
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817787/)
When initiating a transaction, the target_node must
have a strong ref on it. Then we take a second
strong ref to make sure the node survives until the
transaction is complete.
Change-Id: If7429cb43eda520ab89d45df6c19327cee97c60c
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817805/)
Since errors are tracked in the return_error/return_error2
fields of the binder_thread object and BR_TRANSACTION_COMPLETEs
can be tracked either in those fields or via the thread todo
work list, it is possible for errors to be reported ahead
of the associated txn complete.
Use the thread todo work list for errors to guarantee
order. Also changed binder_send_failed_reply to pop
the transaction even if it failed to send a reply.
Bug: 37218618
Test: tested manually
Change-Id: I196cfaeed09fdcd697f8ab25eea4e04241fdb08f
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://lkml.org/lkml/2017/6/29/754)
binder_pop_transaction needs to be split into 2 pieces to
to allow the proc lock to be held on entry to dequeue the
transaction stack, but no lock when kfree'ing the transaction.
Split into binder_pop_transaction_locked and binder_free_transaction
(the actual locks are still to be added).
Change-Id: I848ae994cc27b3cd083cff2dbd1071762784f4a3
Test: tested manually
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817807/)
The log->next index for the transaction log was
not protected when incremented. This led to a
case where log->next++ resulted in an index
larger than ARRAY_SIZE(log->entry) and eventually
a bad access to memory.
Fixed by making the log index an atomic64 and
converting to an array by using "% ARRAY_SIZE(log->entry)"
Also added "complete" field to the log entry which is
written last to tell the print code whether the
entry is complete
Bug: 62038227
Test: tested manually
Change-Id: I1bb1c1a332a6ac458a626f5bedd05022b56b91f2
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817815/)
Adds protection against malicious user code freeing
the same buffer at the same time which could cause
a crash. Cannot happen under normal use.
Bug: 36650912
Change-Id: I43e078cbf31c0789aaff5ceaf8f1a94c75f79d45
Test: tested manually
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817819/)
node is always non-NULL in binder_get_ref_for_node so the
conditional and else clause are not needed
Change-Id: I23f011ba59e1869d9577e6bf28e1f1dd38f45713
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817799/)
The looper member of struct binder_thread is a bitmask
of control bits. All of the existing bits are modified
by the affected thread except for BINDER_LOOPER_STATE_NEED_RETURN
which can be modified in binder_deferred_flush() by
another thread.
To avoid adding a spinlock around all read-mod-writes to
modify a bit, the BINDER_LOOPER_STATE_NEED_RETURN flag
is replaced by a separate field in struct binder_thread.
Bug: 33250092 32225111
Change-Id: Ia4cefbdbd683c6cb17c323ba7d278de5f2ca0745
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817813/)
Currently, the transaction complete work item is queued
after the transaction. This means that it is possible
for the transaction to be handled and a reply to be
enqueued in the current thread before the transaction
complete is enqueued, which violates the protocol
with userspace who may not expect the transaction
complete. Fixed by always enqueing the transaction
complete first.
Also, once the transaction is enqueued, it is unsafe
to access since it might be freed. Currently,
t->flags is accessed to determine whether a sync
wake is needed. Changed to access tr->flags
instead.
Change-Id: I6c01566e167a39cf17c9027c3817618182e56975
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817757/)
In binder_thread_read, the BINDER_WORK_NODE command is used
to communicate the references on the node to userspace. It
can take a couple of iterations in the loop to construct
the list of commands for user space. When locking is added,
the lock would need to be release on each iteration which
means the state could change. The work item is not dequeued
during this process which prevents a simpler queue management
that can just dequeue up front and handle the work item.
Fixed by changing the BINDER_WORK_NODE algorithm in
binder_thread_read to determine which commands to send
to userspace atomically in 1 pass so it stays consistent
with the kernel view.
The work item is now dequeued immediately since only
1 pass is needed.
Change-Id: I9b4109997b2d53ba661867b14d7336cd076be06d
Signed-off-by: Todd Kjos <tkjos@google.com>
(from https://patchwork.kernel.org/patch/9817751/)
Add additional information to determine the cause of binder
failures. Adds the following to failed transaction log and
kernel messages:
return_error : value returned for transaction
return_error_param : errno returned by binder allocator
return_error_line : line number where error detected
Also, return BR_DEAD_REPLY if an allocation error indicates
a dead proc (-ESRCH)
Bug: 36406078
Change-Id: Ifc8881fa5adfcced3f2d67f9030fbd3efa3e2cab
Test: tested manually
Signed-off-by: Todd Kjos <tkjos@google.com>
