From: Yang Li via B4 Relay <devnull+yang.li.amlogic.com@kernel.org>
To: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org,
Yang Li <yang.li@amlogic.com>
Subject: [PATCH] Bluetooth: iso: Fix UAF on iso_sock_disconn
Date: Wed, 05 Nov 2025 17:02:06 +0800 [thread overview]
Message-ID: <20251105-kernel_panic-v1-1-88637054c6b9@amlogic.com> (raw)
From: Yang Li <yang.li@amlogic.com>
kernel panic: Unable to handle kernel read from unreadable
memory at virtual address 00000000000003d8
Call trace:
iso_sock_disconn+0x110/0x1c8
__iso_sock_close+0x50/0x164
iso_sock_release+0x48/0xf0
__sock_release+0x40/0xb4
sock_close+0x18/0x28
__fput+0xd8/0x28c
__fput_sync+0x50/0x5c
__arm64_sys_close+0x38/0x7c
invoke_syscall+0x48/0x118
el0_svc_common.constprop.0+0x40/0xe0
do_el0_svc_compat+0x1c/0x34
el0_svc_compat+0x30/0x88
el0t_32_sync_handler+0x90/0x140
el0t_32_sync+0x198/0x19c
Signed-off-by: Yang Li <yang.li@amlogic.com>
---
net/bluetooth/iso.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index 74ec7d125c88..89c7700ceb81 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -838,14 +838,14 @@ static void __iso_sock_close(struct sock *sk)
case BT_CONNECT:
case BT_CONNECTED:
case BT_CONFIG:
- if (iso_pi(sk)->conn->hcon)
+ if (iso_pi(sk)->conn && iso_pi(sk)->conn->hcon)
iso_sock_disconn(sk);
else
iso_chan_del(sk, ECONNRESET);
break;
case BT_CONNECT2:
- if (iso_pi(sk)->conn->hcon &&
+ if (iso_pi(sk)->conn && iso_pi(sk)->conn->hcon &&
(test_bit(HCI_CONN_PA_SYNC, &iso_pi(sk)->conn->hcon->flags) ||
test_bit(HCI_CONN_PA_SYNC_FAILED, &iso_pi(sk)->conn->hcon->flags)))
iso_sock_disconn(sk);
---
base-commit: 2747d929617743ecba08eeeb310283b4be681383
change-id: 20251105-kernel_panic-73adc703480d
Best regards,
--
Yang Li <yang.li@amlogic.com>
next reply other threads:[~2025-11-05 9:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-05 9:02 Yang Li via B4 Relay [this message]
2025-11-05 9:45 ` Paul Menzel
2025-11-06 2:21 ` Yang Li
2025-11-07 18:52 ` Luiz Augusto von Dentz
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