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Pauli Virtanen 947ec0d002 Bluetooth: fix use-after-free in accessing skb after sending it 
hci_send_cmd_sync first sends skb and then tries to clone it.  However,
the driver may have already freed the skb at that point.

Fix by cloning the sent_cmd cloned just above, instead of the original.

Log:
================================================================
BUG: KASAN: slab-use-after-free in __copy_skb_header+0x1a/0x240
...
Call Trace: ..
 __skb_clone+0x59/0x2c0
 hci_cmd_work+0x3b3/0x3d0 [bluetooth]
 process_one_work+0x459/0x900
...
Allocated by task 129: ...
 __alloc_skb+0x1ae/0x220
 __hci_cmd_sync_sk+0x44c/0x7a0 [bluetooth]
 __hci_cmd_sync_status+0x24/0xb0 [bluetooth]
 set_cig_params_sync+0x778/0x7d0 [bluetooth]
...
Freed by task 0: ...
 kmem_cache_free+0x157/0x3c0
 __usb_hcd_giveback_urb+0x11e/0x1e0
 usb_giveback_urb_bh+0x1ad/0x2a0
 tasklet_action_common.isra.0+0x259/0x4a0
 __do_softirq+0x15b/0x5a7
================================================================

Fixes: 2615fd9a7c ("Bluetooth: hci_sync: Fix overwriting request callback")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
History 2024-03-06 17:26:58 -05:00
arch bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
block block: sed-opal: handle empty atoms when parsing response 2024-02-16 15:52:45 -07:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto crypto: lskcipher - Copy IV in lskcipher glue code always 2024-02-24 08:37:24 +08:00
Documentation mptcp: add token for get-addr in yaml 2024-03-04 13:07:45 +00:00
drivers Bluetooth: btusb: Fix memory leak 2024-03-06 17:26:23 -05:00
fs bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
include Bluetooth: hci_sync: Fix overwriting request callback 2024-03-06 17:26:20 -05:00
init bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
io_uring io_uring/net: fix multishot accept overflow handling 2024-02-14 18:30:19 -07:00
ipc shm: Slim down dependencies 2023-12-20 19:26:31 -05:00
kernel net: adopt skb_network_offset() and similar helpers 2024-03-04 08:47:06 +00:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm net: introduce page_frag_cache_drain() 2024-03-05 11:38:14 +01:00
net Bluetooth: fix use-after-free in accessing skb after sending it 2024-03-06 17:26:58 -05:00
rust rust: phy: use VTABLE_DEFAULT_ERROR 2024-01-27 14:28:00 +00:00
samples bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
scripts bpf-next-for-netdev 2024-03-02 20:50:59 -08:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
sound ALSA: usb-audio: More relaxed check of MIDI jack names 2024-02-15 16:56:05 +01:00
tools tools: ynl: add --dbg-small-recv for easier kernel testing 2024-03-06 12:07:44 +00:00
usr Kbuild updates for v6.8 2024-01-18 17:57:07 -08:00
virt Generic: 2024-01-17 13:03:37 -08:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.mailmap Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: supplement of zswap maintainers update 2024-01-25 23:52:21 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
Makefile Linux 6.8-rc6 2024-02-25 15:46:06 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.