net/bluetooth/iso.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
From: Yang Li <yang.li@amlogic.com>
When the phone stops audio sharing, it terminates the BIG first
and then sends BASS modify and remove operation codes to clear
the shared BIG. If a BIG sync lost event occurs at the same time,
the BIG connection may already be deleted. Releasing the socket
in this case can lead to a NULL connection pointer.
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>
---
Changes in v2:
- Add description about this problem
- Link to v1: https://lore.kernel.org/r/20251105-kernel_panic-v1-1-88637054c6b9@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>Dear Yang, Thank you for the patch. Am 06.11.25 um 03:40 schrieb Yang Li via B4 Relay: > From: Yang Li <yang.li@amlogic.com> > > When the phone stops audio sharing, it terminates the BIG first > and then sends BASS modify and remove operation codes to clear > the shared BIG. If a BIG sync lost event occurs at the same time, > the BIG connection may already be deleted. Releasing the socket > in this case can lead to a NULL connection pointer. > > 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> > --- > Changes in v2: > - Add description about this problem > - Link to v1: https://lore.kernel.org/r/20251105-kernel_panic-v1-1-88637054c6b9@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); Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de> Kind regards, Paul
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