Luiz Augusto von Dentz 59a55ec33a Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put ... commit d0be8347c6 upstream. This fixes the following trace which is caused by hci_rx_work starting up *after* the final channel reference has been put() during sock_close() but *before* the references to the channel have been destroyed, so instead the code now rely on kref_get_unless_zero/l2cap_chan_hold_unless_zero to prevent referencing a channel that is about to be destroyed. refcount_t: increment on 0; use-after-free. BUG: KASAN: use-after-free in refcount_dec_and_test+0x20/0xd0 Read of size 4 at addr ffffffc114f5bf18 by task kworker/u17:14/705 CPU: 4 PID: 705 Comm: kworker/u17:14 Tainted: G S W 4.14.234-00003-g1fb6d0bd49a4-dirty #28 Hardware name: Qualcomm Technologies, Inc. SM8150 V2 PM8150 Google Inc. MSM sm8150 Flame DVT (DT) Workqueue: hci0 hci_rx_work Call trace: dump_backtrace+0x0/0x378 show_stack+0x20/0x2c dump_stack+0x124/0x148 print_address_description+0x80/0x2e8 __kasan_report+0x168/0x188 kasan_report+0x10/0x18 __asan_load4+0x84/0x8c refcount_dec_and_test+0x20/0xd0 l2cap_chan_put+0x48/0x12c l2cap_recv_frame+0x4770/0x6550 l2cap_recv_acldata+0x44c/0x7a4 hci_acldata_packet+0x100/0x188 hci_rx_work+0x178/0x23c process_one_work+0x35c/0x95c worker_thread+0x4cc/0x960 kthread+0x1a8/0x1c4 ret_from_fork+0x10/0x18 Cc: stable@kernel.org Reported-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Tested-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-08-03 12:05:15 +02:00
..
acpi	ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported	2022-07-12 16:42:23 +02:00
asm-generic	bug: Have __warn() prototype defined unconditionally	2022-04-26 10:59:57 +02:00
clocksource
crypto
drm	drm/scheduler: Don't kill jobs in interrupt context	2022-07-29 17:27:56 +02:00
dt-bindings	dt-bindings: clk: mpfs: add defines for two new clocks	2022-04-22 18:40:15 -07:00
keys
kunit
kvm
linux	objtool: Re-add UNWIND_HINT_{SAVE_RESTORE}	2022-07-23 12:56:53 +02:00
math-emu
media
memory	memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode	2022-04-21 17:00:24 +02:00
misc
net	Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put	2022-08-03 12:05:15 +02:00
pcmcia
ras
rdma
scsi	scsi: fcoe: Fix Wstringop-overflow warnings in fcoe_wwn_from_mac()	2022-06-09 10:30:26 +02:00
soc	net: mscc: ocelot: mark traps with a bool instead of keeping them in a list	2022-05-05 19:15:14 -07:00
sound	ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t	2022-06-09 10:29:55 +02:00
target
trace	net: sock: tracing: Fix sock_exceed_buf_limit not to dereference stale pointer	2022-07-22 10:21:19 +02:00
uapi	drm/fourcc: fix integer type usage in uapi header	2022-07-07 17:55:00 +02:00
vdso
video	video: of_display_timing.h: include errno.h	2022-07-12 16:42:17 +02:00
xen