linux-stable.git/net/bluetooth/hidp, branch linux-6.2.y

Bluetooth: Fix race condition in hidp_session_thread

2023-04-20T10:36:51+00:00

commit c95930abd687fcd1aa040dc4fe90dff947916460 upstream.

There is a potential race condition in hidp_session_thread that may
lead to use-after-free. For instance, the timer is active while
hidp_del_timer is called in hidp_session_thread(). After hidp_session_put,
then 'session' will be freed, causing kernel panic when hidp_idle_timeout
is running.

The solution is to use del_timer_sync instead of del_timer.

Here is the call trace:

? hidp_session_probe+0x780/0x780
call_timer_fn+0x2d/0x1e0
__run_timers.part.0+0x569/0x940
hidp_session_probe+0x780/0x780
call_timer_fn+0x1e0/0x1e0
ktime_get+0x5c/0xf0
lapic_next_deadline+0x2c/0x40
clockevents_program_event+0x205/0x320
run_timer_softirq+0xa9/0x1b0
__do_softirq+0x1b9/0x641
__irq_exit_rcu+0xdc/0x190
irq_exit_rcu+0xe/0x20
sysvec_apic_timer_interrupt+0xa1/0xc0

Cc: stable@vger.kernel.org
Signed-off-by: Min Li 
Signed-off-by: Luiz Augusto von Dentz 
Signed-off-by: Greg Kroah-Hartman

Bluetooth: move from strlcpy with unused retval to strscpy

2022-08-25T23:26:18+00:00

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
Signed-off-by: Wolfram Sang 
Signed-off-by: Luiz Augusto von Dentz

Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2022-01-17T03:49:30+00:00

Pull signal/exit/ptrace updates from Eric Biederman:
 "This set of changes deletes some dead code, makes a lot of cleanups
  which hopefully make the code easier to follow, and fixes bugs found
  along the way.

  The end-game which I have not yet reached yet is for fatal signals
  that generate coredumps to be short-circuit deliverable from
  complete_signal, for force_siginfo_to_task not to require changing
  userspace configured signal delivery state, and for the ptrace stops
  to always happen in locations where we can guarantee on all
  architectures that the all of the registers are saved and available on
  the stack.

  Removal of profile_task_ext, profile_munmap, and profile_handoff_task
  are the big successes for dead code removal this round.

  A bunch of small bug fixes are included, as most of the issues
  reported were small enough that they would not affect bisection so I
  simply added the fixes and did not fold the fixes into the changes
  they were fixing.

  There was a bug that broke coredumps piped to systemd-coredump. I
  dropped the change that caused that bug and replaced it entirely with
  something much more restrained. Unfortunately that required some
  rebasing.

  Some successes after this set of changes: There are few enough calls
  to do_exit to audit in a reasonable amount of time. The lifetime of
  struct kthread now matches the lifetime of struct task, and the
  pointer to struct kthread is no longer stored in set_child_tid. The
  flag SIGNAL_GROUP_COREDUMP is removed. The field group_exit_task is
  removed. Issues where task->exit_code was examined with
  signal->group_exit_code should been examined were fixed.

  There are several loosely related changes included because I am
  cleaning up and if I don't include them they will probably get lost.

  The original postings of these changes can be found at:
     https://lkml.kernel.org/r/87a6ha4zsd.fsf@email.froward.int.ebiederm.org
     https://lkml.kernel.org/r/87bl1kunjj.fsf@email.froward.int.ebiederm.org
     https://lkml.kernel.org/r/87r19opkx1.fsf_-_@email.froward.int.ebiederm.org

  I trimmed back the last set of changes to only the obviously correct
  once. Simply because there was less time for review than I had hoped"

* 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (44 commits)
  ptrace/m68k: Stop open coding ptrace_report_syscall
  ptrace: Remove unused regs argument from ptrace_report_syscall
  ptrace: Remove second setting of PT_SEIZED in ptrace_attach
  taskstats: Cleanup the use of task->exit_code
  exit: Use the correct exit_code in /proc//stat
  exit: Fix the exit_code for wait_task_zombie
  exit: Coredumps reach do_group_exit
  exit: Remove profile_handoff_task
  exit: Remove profile_task_exit & profile_munmap
  signal: clean up kernel-doc comments
  signal: Remove the helper signal_group_exit
  signal: Rename group_exit_task group_exec_task
  coredump: Stop setting signal->group_exit_task
  signal: Remove SIGNAL_GROUP_COREDUMP
  signal: During coredumps set SIGNAL_GROUP_EXIT in zap_process
  signal: Make coredump handling explicit in complete_signal
  signal: Have prepare_signal detect coredumps using signal->core_state
  signal: Have the oom killer detect coredumps using signal->core_state
  exit: Move force_uaccess back into do_exit
  exit: Guarantee make_task_dead leaks the tsk when calling do_task_exit
  ...

net: Don't include filter.h from net/sock.h

2021-12-29T16:48:14+00:00

sock.h is pretty heavily used (5k objects rebuilt on x86 after
it's touched). We can drop the include of filter.h from it and
add a forward declaration of struct sk_filter instead.
This decreases the number of rebuilt objects when bpf.h
is touched from ~5k to ~1k.

There's a lot of missing includes this was masking. Primarily
in networking tho, this time.

Signed-off-by: Jakub Kicinski 
Signed-off-by: Alexei Starovoitov 
Acked-by: Marc Kleine-Budde 
Acked-by: Florian Fainelli 
Acked-by: Nikolay Aleksandrov 
Acked-by: Stefano Garzarella 
Link: https://lore.kernel.org/bpf/20211229004913.513372-1-kuba@kernel.org

exit: Rename module_put_and_exit to module_put_and_kthread_exit

2021-12-13T18:04:45+00:00

Update module_put_and_exit to call kthread_exit instead of do_exit.

Change the name to reflect this change in functionality.  All of the
users of module_put_and_exit are causing the current kthread to exit
so this change makes it clear what is happening.  There is no
functional change.

Signed-off-by: "Eric W. Biederman"

Bluetooth: hidp: Use the correct print format

2021-06-26T05:12:40+00:00

According to Documentation/core-api/printk-formats.rst,
Use the correct print format. Printing an unsigned int value should use %u
instead of %d. Otherwise printk() might end up displaying negative numbers.

Signed-off-by: Kai Ye 
Signed-off-by: Marcel Holtmann

Bluetooth: use inclusive language in comments

2021-06-26T05:12:38+00:00

This patch replaces some non-inclusive terms based on the appropriate
language mapping table compiled by the Bluetooth SIG:
https://specificationrefs.bluetooth.com/language-mapping/Appropriate_Language_Mapping_Table.pdf

Specifically, these terms are replaced:
slave       -> peripheral
blacklisted -> blocked

Signed-off-by: Archie Pusaka 
Reviewed-by: Miao-chen Chou 
Signed-off-by: Marcel Holtmann

Bluetooth: hidp: use correct wait queue when removing ctrl_wait

2020-11-09T13:02:47+00:00

A different wait queue was used when removing ctrl_wait than when adding
it. This effectively made the remove operation without locking compared
to other operations on the wait queue ctrl_wait was part of. This caused
issues like below where dead000000000100 is LIST_POISON1 and
dead000000000200 is LIST_POISON2.

 list_add corruption. next->prev should be prev (ffffffc1b0a33a08), \
	but was dead000000000200. (next=ffffffc03ac77de0).
 ------------[ cut here ]------------
 CPU: 3 PID: 2138 Comm: bluetoothd Tainted: G           O    4.4.238+ #9
 ...
 ---[ end trace 0adc2158f0646eac ]---
 Call trace:
 [] __list_add+0x38/0xb0
 [] add_wait_queue+0x4c/0x68
 [] __pollwait+0xec/0x100
 [] bt_sock_poll+0x74/0x200
 [] sock_poll+0x110/0x128
 [] do_sys_poll+0x220/0x480
 [] SyS_poll+0x80/0x138
 [] __sys_trace_return+0x0/0x4

 Unable to handle kernel paging request at virtual address dead000000000100
 ...
 CPU: 4 PID: 5387 Comm: kworker/u15:3 Tainted: G        W  O    4.4.238+ #9
 ...
 Call trace:
  [] __wake_up_common+0x7c/0xa8
  [] __wake_up+0x50/0x70
  [] sock_def_wakeup+0x58/0x60
  [] l2cap_sock_teardown_cb+0x200/0x224
  [] l2cap_chan_del+0xa4/0x298
  [] l2cap_conn_del+0x118/0x198
  [] l2cap_disconn_cfm+0x6c/0x78
  [] hci_event_packet+0x564/0x2e30
  [] hci_rx_work+0x10c/0x360
  [] process_one_work+0x268/0x460
  [] worker_thread+0x268/0x480
  [] kthread+0x118/0x128
  [] ret_from_fork+0x10/0x20
  ---[ end trace 0adc2158f0646ead ]---

Signed-off-by: Ole Bjørn Midtbø 
Signed-off-by: Marcel Holtmann

net: make ->{get,set}sockopt in proto_ops optional

2020-07-20T01:16:41+00:00

Just check for a NULL method instead of wiring up
sock_no_{get,set}sockopt.

Signed-off-by: Christoph Hellwig 
Acked-by: Marc Kleine-Budde 
Signed-off-by: David S. Miller

Bluetooth: optimize barrier usage for Rmw atomics

2020-01-29T18:50:44+00:00

Use smp_mb__before_atomic() instead of smp_mb() and avoid the
unnecessary barrier for non LL/SC architectures, such as x86.

Signed-off-by: Davidlohr Bueso 
Signed-off-by: Marcel Holtmann