Bluetooth: Fix null pointer dereference in amp_read_loc_assoc_final_data
BugLink: https://bugs.launchpad.net/bugs/1920235
[ Upstream commit
e8bd76ede155fd54d8c41d045dda43cd3174d506 ]
kernel panic trace looks like:
#5 [
ffffb9e08698fc80] do_page_fault at
ffffffffb666e0d7
#6 [
ffffb9e08698fcb0] page_fault at
ffffffffb70010fe
[exception RIP: amp_read_loc_assoc_final_data+63]
RIP:
ffffffffc06ab54f RSP:
ffffb9e08698fd68 RFLAGS:
00010246
RAX:
0000000000000000 RBX:
ffff8c8845a5a000 RCX:
0000000000000004
RDX:
0000000000000000 RSI:
ffff8c8b9153d000 RDI:
ffff8c8845a5a000
RBP:
ffffb9e08698fe40 R8:
00000000000330e0 R9:
ffffffffc0675c94
R10:
ffffb9e08698fe58 R11:
0000000000000001 R12:
ffff8c8b9cbf6200
R13:
0000000000000000 R14:
0000000000000000 R15:
ffff8c8b2026da0b
ORIG_RAX:
ffffffffffffffff CS: 0010 SS: 0018
#7 [
ffffb9e08698fda8] hci_event_packet at
ffffffffc0676904 [bluetooth]
#8 [
ffffb9e08698fe50] hci_rx_work at
ffffffffc06629ac [bluetooth]
#9 [
ffffb9e08698fe98] process_one_work at
ffffffffb66f95e7
hcon->amp_mgr seems NULL triggered kernel panic in following line inside
function amp_read_loc_assoc_final_data
set_bit(READ_LOC_AMP_ASSOC_FINAL, &mgr->state);
Fixed by checking NULL for mgr.
Signed-off-by: Gopal Tiwari <gtiwari@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>