BUG: sleeping function called from invalid context at net/core/sock.c:3253 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4055, name: kworker/u5:1 6 locks held by kworker/u5:1/4055: #0: ffff0000d5e5e138 ((wq_completion)hci0#2){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f897c00 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff0000dbb28078 (&hdev->lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0xb0/0x89c net/bluetooth/hci_event.c:4471 #3: ffff8000163b8da8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1502 [inline] #3: ffff8000163b8da8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x400/0x89c net/bluetooth/hci_event.c:4551 #4: ffff0000cf5dc820 (&conn->lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline] #4: ffff0000cf5dc820 (&conn->lock#2){+.+.}-{2:2}, at: sco_conn_ready net/bluetooth/sco.c:1119 [inline] #4: ffff0000cf5dc820 (&conn->lock#2){+.+.}-{2:2}, at: sco_connect_cfm+0x25c/0x8c0 net/bluetooth/sco.c:1204 #5: ffff0000d6723120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1694 [inline] #5: ffff0000d6723120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1132 [inline] #5: ffff0000d6723120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x3cc/0x8c0 net/bluetooth/sco.c:1204 Preemption disabled at: [] spin_lock include/linux/spinlock.h:363 [inline] [] sco_conn_ready net/bluetooth/sco.c:1119 [inline] [] sco_connect_cfm+0x25c/0x8c0 net/bluetooth/sco.c:1204 CPU: 1 PID: 4055 Comm: kworker/u5:1 Not tainted 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: hci0 hci_rx_work Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 ___might_sleep+0x358/0x4d4 kernel/sched/core.c:9639 __might_sleep+0x98/0x124 kernel/sched/core.c:9593 lock_sock_nested+0xec/0x1d4 net/core/sock.c:3253 lock_sock include/net/sock.h:1694 [inline] sco_conn_ready net/bluetooth/sco.c:1132 [inline] sco_connect_cfm+0x3cc/0x8c0 net/bluetooth/sco.c:1204 hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline] hci_sync_conn_complete_evt+0x468/0x89c net/bluetooth/hci_event.c:4551 hci_event_packet+0xa24/0x11bc net/bluetooth/hci_event.c:6481 hci_rx_work+0x1cc/0x880 net/bluetooth/hci_core.c:5160 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0xf0/0x651c kernel/locking/lockdep.c:4882 Read of size 8 at addr ffff0000d67230a0 by task kworker/u5:1/4055 CPU: 1 PID: 4055 Comm: kworker/u5:1 Tainted: G W 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: hci0 hci_rx_work Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 __lock_acquire+0xf0/0x651c kernel/locking/lockdep.c:4882 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x114/0x1b4 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] lock_sock_nested+0xf4/0x1d4 net/core/sock.c:3254 lock_sock include/net/sock.h:1694 [inline] sco_conn_ready net/bluetooth/sco.c:1132 [inline] sco_connect_cfm+0x3cc/0x8c0 net/bluetooth/sco.c:1204 hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline] hci_sync_conn_complete_evt+0x468/0x89c net/bluetooth/hci_event.c:4551 hci_event_packet+0xa24/0x11bc net/bluetooth/hci_event.c:6481 hci_rx_work+0x1cc/0x880 net/bluetooth/hci_core.c:5160 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Allocated by task 5009: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb0/0xf0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x298/0x44c mm/slub.c:4407 kmalloc include/linux/slab.h:609 [inline] sk_prot_alloc+0xc4/0x1f0 net/core/sock.c:1864 sk_alloc+0x40/0x388 net/core/sock.c:1917 sco_sock_alloc net/bluetooth/sco.c:491 [inline] sco_sock_create+0xb8/0x2d4 net/bluetooth/sco.c:526 bt_sock_create+0x14c/0x24c net/bluetooth/af_bluetooth.c:130 __sock_create+0x4b0/0x8b4 net/socket.c:1486 sock_create net/socket.c:1542 [inline] __sys_socket+0xf0/0x18c net/socket.c:1584 __do_sys_socket net/socket.c:1593 [inline] __se_sys_socket net/socket.c:1591 [inline] __arm64_sys_socket+0x7c/0x94 net/socket.c:1591 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Freed by task 5008: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1e8 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x170/0x40c mm/slub.c:4559 sk_prot_free net/core/sock.c:1900 [inline] __sk_destruct+0x41c/0x604 net/core/sock.c:1986 sk_destruct net/core/sock.c:2001 [inline] __sk_free+0x320/0x430 net/core/sock.c:2012 sk_free+0x68/0xdc net/core/sock.c:2023 sock_put include/net/sock.h:1939 [inline] sco_sock_kill+0x104/0x1c8 net/bluetooth/sco.c:412 sco_sock_release+0x1f8/0x2c4 net/bluetooth/sco.c:1101 __sock_release net/socket.c:649 [inline] sock_close+0xb4/0x1f8 net/socket.c:1336 __fput+0x1c0/0x7f8 fs/file_table.c:311 ____fput+0x20/0x30 fs/file_table.c:339 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the object at ffff0000d6723000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 160 bytes inside of 2048-byte region [ffff0000d6723000, ffff0000d6723800) The buggy address belongs to the page: page:000000008d9684c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116720 head:000000008d9684c2 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002900 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d6722f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d6723000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d6723080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d6723100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d6723180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Unable to handle kernel paging request at virtual address dfff800000000000 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4055 Comm: kworker/u5:1 Tainted: G B W 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: hci0 hci_rx_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : apparmor_sk_clone_security+0xf4/0x3e0 security/apparmor/lsm.c:818 lr : apparmor_sk_clone_security+0xd4/0x3e0 security/apparmor/lsm.c:816 sp : ffff80001f897780 x29: ffff80001f897780 x28: 1ffff00003f12f04 x27: dfff800000000000 x26: 1fffe00019ebb909 x25: ffff0000d67273aa x24: 1fffe0001d50cfe0 x23: dfff800000000000 x22: dfff800000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000ea867f00 x18: 0000000000000204 x17: ffff8000104ca460 x16: ffff8000082d55bc x15: ffff80000f67ad3c x14: ffff80000f67b164 x13: ffff80000802cae0 x12: 0000000000ff0100 x11: 0000000000000001 x10: 0000000000000000 x9 : ffff80000a423cc0 x8 : 0000000000000000 x7 : ffffffffffffffff x6 : ffff80001048f6c0 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80000a423c34 x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000 Call trace: apparmor_sk_clone_security+0xf4/0x3e0 security/apparmor/lsm.c:818 security_sk_clone+0x58/0x9c security/security.c:2318 sco_sock_init net/bluetooth/sco.c:474 [inline] sco_conn_ready net/bluetooth/sco.c:1142 [inline] sco_connect_cfm+0x578/0x8c0 net/bluetooth/sco.c:1204 hci_connect_cfm include/net/bluetooth/hci_core.h:1505 [inline] hci_sync_conn_complete_evt+0x468/0x89c net/bluetooth/hci_event.c:4551 hci_event_packet+0xa24/0x11bc net/bluetooth/hci_event.c:6481 hci_rx_work+0x1cc/0x880 net/bluetooth/hci_core.c:5160 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Code: 710006df 540010cb 9781530a d343fe88 (38776908) ---[ end trace cb3c7419a5ef6627 ]--- ---------------- Code disassembly (best guess): 0: 710006df cmp w22, #0x1 4: 540010cb b.lt 0x21c // b.tstop 8: 9781530a bl 0xfffffffffe054c30 c: d343fe88 lsr x8, x20, #3 * 10: 38776908 ldrb w8, [x8, x23] <-- trapping instruction