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linux/net/bluetooth
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Luiz Augusto von Dentz b22346eec4 Bluetooth: L2CAP: Fix uaf in l2cap_connect 
commit 333b4fd11e upstream.

[Syzbot reported]
BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54

CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: hci2 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline]
 l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline]
 l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline]
 l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825
 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514
 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline]
 hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
...

Freed by task 5245:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2256 [inline]
 slab_free mm/slub.c:4477 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4598
 l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline]
 kref_put include/linux/kref.h:65 [inline]
 l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline]
 l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802
 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241
 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
 hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265
 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583
 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917
 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Reported-by: syzbot+c12e2f941af1feb5632c@syzkaller.appspotmail.com
Tested-by: syzbot+c12e2f941af1feb5632c@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=c12e2f941af1feb5632c
Fixes: 7b064edae3 ("Bluetooth: Fix authentication if acl data comes before remote feature evt")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[Xiangyu: Modified to bp this commit to fix CVE-2024-49950]
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-11-17 15:07:22 +01:00
..
bnep Bluetooth: bnep: fix wild-memory-access in proto_unregister 2024-11-01 01:56:01 +01:00
cmtp Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
hidp Bluetooth: Fix race condition in hidp_session_thread 2023-04-20 12:35:06 +02:00
rfcomm Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change 2024-10-17 15:22:19 +02:00
6lowpan.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
a2mp.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
a2mp.h Bluetooth: Replace zero-length array with flexible-array member 2020-02-28 08:30:02 +01:00
af_bluetooth.c Revert "Bluetooth: af_bluetooth: Fix deadlock" 2024-11-17 15:07:19 +01:00
amp.c Bluetooth: amp: Use the correct print format 2021-06-26 07:12:41 +02:00
amp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
aosp.c Bluetooth: Fix null pointer deref on unexpected status event 2022-08-08 17:04:37 -07:00
aosp.h Bluetooth: aosp: Support AOSP Bluetooth Quality Report 2021-11-02 19:37:52 +01:00
ecdh_helper.c crypto: ecdh - move curve_id of ECDH from the key to algorithm name 2021-03-13 00:04:03 +11:00
ecdh_helper.h Fix misc new gcc warnings 2021-04-27 17:05:53 -07:00
eir.c Bluetooth: Fix eir name length 2024-03-26 18:20:42 -04:00
eir.h Bluetooth: Add initial implementation of BIS connections 2022-07-22 17:13:56 -07:00
hci_codec.c Bluetooth: Fix support for Read Local Supported Codecs V2 2022-12-02 13:09:31 -08:00
hci_codec.h Bluetooth: Add support for Read Local Supported Codecs V2 2021-09-07 14:09:18 -07:00
hci_conn.c Revert "Bluetooth: hci_conn: Consolidate code for aborting connections" 2024-11-17 15:07:19 +01:00
hci_core.c Bluetooth: L2CAP: Fix uaf in l2cap_connect 2024-11-17 15:07:22 +01:00
hci_debugfs.c Bluetooth: Fix TOCTOU in HCI debugfs implementation 2024-04-10 16:28:24 +02:00
hci_debugfs.h Bluetooth: hci_core: Move all debugfs handling to hci_debugfs.c 2021-09-22 16:17:13 +02:00
hci_event.c Bluetooth: L2CAP: Fix uaf in l2cap_connect 2024-11-17 15:07:22 +01:00
hci_request.c Bluetooth: Fix memory leak in hci_req_sync_complete() 2024-04-17 11:18:22 +02:00
hci_request.h Bluetooth: Delete unused hci_req_prepare_suspend() declaration 2023-10-10 22:00:40 +02:00
hci_sock.c Bluetooth: hci_sock: Fix not validating setsockopt user input 2024-10-17 15:21:33 +02:00
hci_sync.c Revert "Bluetooth: hci_conn: Consolidate code for aborting connections" 2024-11-17 15:07:19 +01:00
hci_sysfs.c Bluetooth: Fix double free in hci_conn_cleanup 2023-11-28 17:06:56 +00:00
iso.c Bluetooth: ISO: Fix UAF on iso_sock_timeout 2024-11-01 01:56:05 +01:00
Kconfig Bluetooth: Add initial implementation of CIS connections 2022-07-22 17:13:22 -07:00
l2cap_core.c Bluetooth: L2CAP: Fix uaf in l2cap_connect 2024-11-17 15:07:22 +01:00
l2cap_sock.c Bluetooth: L2CAP: Fix deadlock 2024-07-25 09:49:20 +02:00
leds.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
leds.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
lib.c Bluetooth: Fix EALREADY and ELOOP cases in bt_status() 2022-12-31 13:32:28 +01:00
Makefile Bluetooth: Add BTPROTO_ISO socket type 2022-07-22 17:13:39 -07:00
mgmt.c Revert "Bluetooth: hci_conn: Consolidate code for aborting connections" 2024-11-17 15:07:19 +01:00
mgmt_config.c Bluetooth: mgmt: Use the correct print format 2021-06-26 07:12:42 +02:00
mgmt_config.h Bluetooth: mgmt: Add commands for runtime configuration 2020-06-18 13:11:03 +03:00
mgmt_util.c Bluetooth: Implement support for Mesh 2022-09-06 13:18:24 -07:00
mgmt_util.h Bluetooth: Fix a buffer overflow in mgmt_mesh_add() 2023-02-01 08:34:21 +01:00
msft.c Bluetooth: msft: fix slab-use-after-free in msft_do_close() 2024-05-17 11:56:11 +02:00
msft.h Bluetooth: msft: fix slab-use-after-free in msft_do_close() 2024-05-17 11:56:11 +02:00
sco.c Bluetooth: SCO: Fix UAF on sco_sock_timeout 2024-11-01 01:56:05 +01:00
selftest.c crypto: ecdh - move curve_id of ECDH from the key to algorithm name 2021-03-13 00:04:03 +11:00
selftest.h Bluetooth: Add support for self testing framework 2014-12-30 08:53:55 +02:00
smp.c Revert "Bluetooth: MGMT/SMP: Fix address type when using SMP over BREDR/LE" 2024-09-12 11:10:17 +02:00
smp.h Bluetooth: use inclusive language in SMP 2021-06-26 07:12:37 +02:00