Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177]
CPU: 1 UID: 0 PID: 5604 Comm: syz-executor.2 Not tainted 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 4f 47 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff88804dc779f8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90000a16000
RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174
RBP: ffff88800b95ad00 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88804bfdd01c R14: ffff88801565ecb0 R15: ffff88801c0d0878
FS: 00007fb1992ef700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c4d6c58 CR3: 000000001669b000 CR4: 0000000000350ef0
Call Trace:
create_new_namespaces+0x585/0x750
copy_namespaces+0x45c/0x580
copy_process+0x26e4/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb19bd9ab19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb1992ef188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fb19beae020 RCX: 00007fb19bd9ab19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007fb19bdf4f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5c10167f R14: 00007fb1992ef300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 4f 47 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff88804dc779f8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90000a16000
RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174
RBP: ffff88800b95ad00 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88804bfdd01c R14: ffff88801565ecb0 R15: ffff88801c0d0878
FS: 00007fb1992ef700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c4d6c58 CR3: 000000001669b000 CR4: 0000000000350ef0
Zero length message leads to an empty skb
Bluetooth: hci2: unexpected subevent 0x01 length: 30 > 18
Bluetooth: hci2: unexpected subevent 0x01 length: 30 > 18
debugfs: '0' already exists in 'hci2'
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0'
CPU: 0 UID: 0 PID: 306 Comm: kworker/u11:6 Tainted: G D 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci2 hci_rx_work
Call Trace:
dump_stack_lvl+0xfa/0x120
sysfs_warn_dup+0x80/0xa0
sysfs_create_dir_ns+0x23b/0x2a0
kobject_add_internal+0x24c/0x9a0
kobject_add+0x157/0x240
device_add+0x32d/0x1830
hci_conn_add_sysfs+0x117/0x1c0
le_conn_complete_evt+0x124b/0x1f60
hci_le_conn_complete_evt+0x22a/0x2c0
hci_le_meta_evt+0x34b/0x530
hci_event_packet+0x66c/0x10e0
hci_rx_work+0x96c/0x1270
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x67a/0x7a0
ret_from_fork_asm+0x1a/0x30
kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
Bluetooth: hci2: unexpected subevent 0x01 length: 30 > 18
debugfs: '0' already exists in 'hci2'
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0'
CPU: 0 UID: 0 PID: 298 Comm: kworker/u11:5 Tainted: G D 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci2 hci_rx_work
Call Trace:
dump_stack_lvl+0xfa/0x120
sysfs_warn_dup+0x80/0xa0
sysfs_create_dir_ns+0x23b/0x2a0
kobject_add_internal+0x24c/0x9a0
kobject_add+0x157/0x240
device_add+0x32d/0x1830
hci_conn_add_sysfs+0x117/0x1c0
le_conn_complete_evt+0x124b/0x1f60
hci_le_conn_complete_evt+0x22a/0x2c0
hci_le_meta_evt+0x34b/0x530
hci_event_packet+0x66c/0x10e0
hci_rx_work+0x96c/0x1270
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x67a/0x7a0
ret_from_fork_asm+0x1a/0x30
kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
----------------
Code disassembly (best guess):
0: 02 00 add (%rax),%al
2: 00 4c 8b 65 add %cl,0x65(%rbx,%rcx,4)
6: 28 4d 85 sub %cl,-0x7b(%rbp)
9: e4 74 in $0x74,%al
b: 43 e8 4f 47 30 00 rex.XB callq 0x304760
11: 49 8d bc 24 78 01 00 lea 0x178(%r12),%rdi
18: 00
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 f7 02 00 00 jne 0x32b
34: 49 8b 9c 24 78 01 00 mov 0x178(%r12),%rbx
3b: 00
3c: bf .byte 0xbf
3d: 08 00 or %al,(%rax)