general protection fault, probably for non-canonical address 0xdffffc0000000026: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137] CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.6.0-rc6-syzkaller-00355-gfe3cfe869d5e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events l2cap_info_timeout RIP: 0010:__lock_acquire+0x109/0x5de0 kernel/locking/lockdep.c:5004 Code: 45 85 c9 0f 84 cc 0e 00 00 44 8b 05 c1 2e 42 0b 45 85 c0 0f 84 be 0d 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 d1 48 c1 e9 03 <80> 3c 11 00 0f 85 e8 40 00 00 49 81 3a a0 59 60 90 0f 84 96 0d 00 RSP: 0018:ffffc900000e78e8 EFLAGS: 00010012 RAX: ffff888016260000 RBX: 1ffff9200001cf4d RCX: 0000000000000026 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000130 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000130 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6d3b75198 CR3: 0000000033562000 CR4: 0000000000350ef0 Call Trace: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 lock_sock_nested+0x3a/0xf0 net/core/sock.c:3505 lock_sock include/net/sock.h:1720 [inline] l2cap_sock_ready_cb+0x41/0x160 net/bluetooth/l2cap_sock.c:1630 l2cap_chan_ready net/bluetooth/l2cap_core.c:1365 [inline] l2cap_conn_start+0x15c/0xa40 net/bluetooth/l2cap_core.c:1640 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x109/0x5de0 kernel/locking/lockdep.c:5004 Code: 45 85 c9 0f 84 cc 0e 00 00 44 8b 05 c1 2e 42 0b 45 85 c0 0f 84 be 0d 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 d1 48 c1 e9 03 <80> 3c 11 00 0f 85 e8 40 00 00 49 81 3a a0 59 60 90 0f 84 96 0d 00 RSP: 0018:ffffc900000e78e8 EFLAGS: 00010012 RAX: ffff888016260000 RBX: 1ffff9200001cf4d RCX: 0000000000000026 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000130 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000130 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6d3b75198 CR3: 0000000033562000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 45 85 c9 test %r9d,%r9d 3: 0f 84 cc 0e 00 00 je 0xed5 9: 44 8b 05 c1 2e 42 0b mov 0xb422ec1(%rip),%r8d # 0xb422ed1 10: 45 85 c0 test %r8d,%r8d 13: 0f 84 be 0d 00 00 je 0xdd7 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 4c 89 d1 mov %r10,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) <-- trapping instruction 2e: 0f 85 e8 40 00 00 jne 0x411c 34: 49 81 3a a0 59 60 90 cmpq $0xffffffff906059a0,(%r10) 3b: 0f .byte 0xf 3c: 84 .byte 0x84 3d: 96 xchg %eax,%esi 3e: 0d .byte 0xd