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| author | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2024-03-01 12:58:11 -0500 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2024-03-06 17:26:25 -0500 |
| commit | f7b94bdc1ec107c92262716b073b3e816d4784fb (patch) | |
| tree | 7ae770f2430844d22ca97738d43e9707f86dc444 /fs/qnx4 | |
| parent | 0f0639b4d6f649338ce29c62da3ec0787fa08cd1 (diff) | |
| download | linux-stable-f7b94bdc1ec107c92262716b073b3e816d4784fb.tar.gz linux-stable-f7b94bdc1ec107c92262716b073b3e816d4784fb.tar.bz2 linux-stable-f7b94bdc1ec107c92262716b073b3e816d4784fb.zip | |
Bluetooth: af_bluetooth: Fix deadlock
Attemting to do sock_lock on .recvmsg may cause a deadlock as shown
bellow, so instead of using sock_sock this uses sk_receive_queue.lock
on bt_sock_ioctl to avoid the UAF:
INFO: task kworker/u9:1:121 blocked for more than 30 seconds.
Not tainted 6.7.6-lemon #183
Workqueue: hci0 hci_rx_work
Call Trace:
<TASK>
__schedule+0x37d/0xa00
schedule+0x32/0xe0
__lock_sock+0x68/0xa0
? __pfx_autoremove_wake_function+0x10/0x10
lock_sock_nested+0x43/0x50
l2cap_sock_recv_cb+0x21/0xa0
l2cap_recv_frame+0x55b/0x30a0
? psi_task_switch+0xeb/0x270
? finish_task_switch.isra.0+0x93/0x2a0
hci_rx_work+0x33a/0x3f0
process_one_work+0x13a/0x2f0
worker_thread+0x2f0/0x410
? __pfx_worker_thread+0x10/0x10
kthread+0xe0/0x110
? __pfx_kthread+0x10/0x10
ret_from_fork+0x2c/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
</TASK>
Fixes: 2e07e8348ea4 ("Bluetooth: af_bluetooth: Fix Use-After-Free in bt_sock_recvmsg")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'fs/qnx4')
0 files changed, 0 insertions, 0 deletions