Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff] CPU: 0 UID: 0 PID: 19100 Comm: syz.1.3472 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline] RIP: 0010:__mutex_lock+0x14b/0x1300 kernel/locking/mutex.c:776 Code: 80 f4 27 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 e4 0f 00 00 83 3d f3 0e 77 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 49 1c 7f f6 4d 39 64 24 60 0f 85 10 0f 00 RSP: 0018:ffffc9000bf077c0 EFLAGS: 00010206 RAX: 000000000000005f RBX: 1ffff920017e0f10 RCX: ffffffff9a27f403 RDX: 0000000000000000 RSI: ffffffff8e16b69a RDI: 00000000000002f8 RBP: ffffc9000bf07980 R08: ffffc9000bf078e7 R09: 0000000000000000 R10: ffffc9000bf078c0 R11: fffff520017e0f1d R12: 0000000000000298 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fafe4aac6c0(0000) GS:ffff888125457000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009d122000 CR4: 00000000003526f0 Call Trace: l2cap_unregister_user+0x36/0x170 net/bluetooth/l2cap_core.c:1740 hidp_connection_del+0xb0/0x170 net/bluetooth/hidp/core.c:1421 do_hidp_sock_ioctl net/bluetooth/hidp/sock.c:97 [inline] hidp_sock_ioctl+0x3ab/0x650 net/bluetooth/hidp/sock.c:128 sock_do_ioctl+0x101/0x320 net/socket.c:1254 sock_ioctl+0x5c6/0x7f0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fafe3b9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fafe4aac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fafe3e16180 RCX: 00007fafe3b9c819 RDX: 0000200000000140 RSI: 00000000400448c9 RDI: 0000000000000008 RBP: 00007fafe3c32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fafe3e16218 R14: 00007fafe3e16180 R15: 00007ffdb0882a08 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline] RIP: 0010:__mutex_lock+0x14b/0x1300 kernel/locking/mutex.c:776 Code: 80 f4 27 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 e4 0f 00 00 83 3d f3 0e 77 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 49 1c 7f f6 4d 39 64 24 60 0f 85 10 0f 00 RSP: 0018:ffffc9000bf077c0 EFLAGS: 00010206 RAX: 000000000000005f RBX: 1ffff920017e0f10 RCX: ffffffff9a27f403 RDX: 0000000000000000 RSI: ffffffff8e16b69a RDI: 00000000000002f8 RBP: ffffc9000bf07980 R08: ffffc9000bf078e7 R09: 0000000000000000 R10: ffffc9000bf078c0 R11: fffff520017e0f1d R12: 0000000000000298 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fafe4aac6c0(0000) GS:ffff888125557000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002280 CR3: 000000009d122000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 48 c1 e8 03 shr $0x3,%rax 4: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 9: 84 c0 test %al,%al b: 0f 85 e4 0f 00 00 jne 0xff5 11: 83 3d f3 0e 77 0e 00 cmpl $0x0,0xe770ef3(%rip) # 0xe770f0b 18: 75 23 jne 0x3d 1a: 49 8d 7c 24 60 lea 0x60(%r12),%rdi 1f: 48 89 f8 mov %rdi,%rax 22: 48 c1 e8 03 shr $0x3,%rax * 26: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2b: 74 05 je 0x32 2d: e8 49 1c 7f f6 call 0xf67f1c7b 32: 4d 39 64 24 60 cmp %r12,0x60(%r12) 37: 0f .byte 0xf 38: 85 10 test %edx,(%rax) 3a: 0f .byte 0xf