KASAN: slab-use-after-free Read in hci_cmd_work
Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
==================================================================
BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0 net/bluetooth/hci_core.c:4174
Read of size 2 at addr ffff888032860df8 by task kworker/u9:2/5921
CPU: 0 UID: 0 PID: 5921 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: hci0 hci_cmd_work
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
hci_cmd_work+0x5d0/0x7b0 net/bluetooth/hci_core.c:4174
process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
process_scheduled_works kernel/workqueue.c:3344 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Allocated by task 5148:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:339 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:365
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
kmem_cache_alloc_node_noprof+0x43c/0x710 mm/slub.c:5310
__alloc_skb+0x112/0x2d0 net/core/skbuff.c:664
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x3d/0x3b0 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x1a7/0xc70 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:263 [inline]
__hci_cmd_sync_status net/bluetooth/hci_sync.c:287 [inline]
hci_read_num_supported_iac_sync+0x2c/0x120 net/bluetooth/hci_sync.c:3792
hci_init_stage_sync net/bluetooth/hci_sync.c:3623 [inline]
hci_init2_sync net/bluetooth/hci_sync.c:4047 [inline]
hci_init_sync net/bluetooth/hci_sync.c:4881 [inline]
hci_dev_init_sync net/bluetooth/hci_sync.c:5066 [inline]
hci_dev_open_sync+0x243b/0x2dc0 net/bluetooth/hci_sync.c:5144
hci_dev_do_open net/bluetooth/hci_core.c:430 [inline]
hci_power_on+0x1b4/0x720 net/bluetooth/hci_core.c:959
process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
process_scheduled_works kernel/workqueue.c:3344 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Freed by task 5941:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6663 [inline]
kmem_cache_free+0x197/0x640 mm/slub.c:6774
kfree_skb_reason include/linux/skbuff.h:1322 [inline]
kfree_skb include/linux/skbuff.h:1331 [inline]
vhci_read+0x49a/0x5b0 drivers/bluetooth/hci_vhci.c:593
vfs_read+0x200/0xa30 fs/read_write.c:570
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888032860dc0
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 56 bytes inside of
freed 240-byte region [ffff888032860dc0, ffff888032860eb0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32860
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801e6a6a00 0000000000000000 dead000000000001
raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5197, tgid 5197 (udevd), ts 30354371909, free_ts 29959051150
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3920
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5215
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab+0x86/0x3b0 mm/slub.c:3248
new_slab mm/slub.c:3302 [inline]
___slab_alloc+0xf56/0x1990 mm/slub.c:4651
__slab_alloc+0x65/0x100 mm/slub.c:4774
__slab_alloc_node mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:5246 [inline]
kmem_cache_alloc_node_noprof+0x4ce/0x710 mm/slub.c:5310
__alloc_skb+0x112/0x2d0 net/core/skbuff.c:664
netlink_sendmsg+0x5c6/0xb30 net/netlink/af_netlink.c:1869
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:746
____sys_sendmsg+0x505/0x870 net/socket.c:2634
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2688
__sys_sendmsg net/socket.c:2720 [inline]
__do_sys_sendmsg net/socket.c:2725 [inline]
__se_sys_sendmsg net/socket.c:2723 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2723
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5205 tgid 5205 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2948
discard_slab mm/slub.c:3346 [inline]
__put_partials+0x146/0x170 mm/slub.c:3886
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3961
__slab_free+0x288/0x2a0 mm/slub.c:5947
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
kmem_cache_alloc_noprof+0x37d/0x700 mm/slub.c:5265
lsm_file_alloc security/security.c:169 [inline]
security_file_alloc+0x34/0x330 security/security.c:2380
init_file+0x93/0x2f0 fs/file_table.c:159
alloc_empty_file+0x6e/0x1d0 fs/file_table.c:241
path_openat+0xff/0x3860 fs/namei.c:4159
do_filp_open+0x1fa/0x410 fs/namei.c:4200
do_sys_openat2+0x121/0x1c0 fs/open.c:1434
do_sys_open fs/open.c:1449 [inline]
__do_sys_openat fs/open.c:1465 [inline]
__se_sys_openat fs/open.c:1460 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1460
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
Memory state around the buggy address:
ffff888032860c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888032860d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
>ffff888032860d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff888032860e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888032860e80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
==================================================================
Warning: Permanently added '10.128.1.147' (ED25519) to the list of known hosts.
2025/11/17 03:07:31 parsed 1 programs
[ 77.845999][ T5831] cgroup: Unknown subsys name 'net'
[ 77.938843][ T5831] cgroup: Unknown subsys name 'cpuset'
[ 77.947653][ T5831] cgroup: Unknown subsys name 'rlimit'
[ 79.377546][ T5831] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 82.308620][ T5843] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 84.423233][ T50] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 84.431403][ T50] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 84.476198][ T50] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 84.484694][ T50] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 84.754146][ T5898] chnl_net:caif_netlink_parms(): no params data found
[ 84.855713][ T5898] bridge0: port 1(bridge_slave_0) entered blocking state
[ 84.863012][ T5898] bridge0: port 1(bridge_slave_0) entered disabled state
[ 84.871344][ T5898] bridge_slave_0: entered allmulticast mode
[ 84.878780][ T5898] bridge_slave_0: entered promiscuous mode
[ 84.888636][ T5898] bridge0: port 2(bridge_slave_1) entered blocking state
[ 84.896205][ T5898] bridge0: port 2(bridge_slave_1) entered disabled state
[ 84.903983][ T5898] bridge_slave_1: entered allmulticast mode
[ 84.912029][ T5898] bridge_slave_1: entered promiscuous mode
[ 84.963255][ T5898] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 84.974859][ T5898] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 85.026123][ T5898] team0: Port device team_slave_0 added
[ 85.033963][ T5898] team0: Port device team_slave_1 added
[ 85.084776][ T5898] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 85.092402][ T5898] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 85.119193][ T5898] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 85.132255][ T5898] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 85.139329][ T5898] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 85.165758][ T5898] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 85.208570][ T5898] hsr_slave_0: entered promiscuous mode
[ 85.215391][ T5898] hsr_slave_1: entered promiscuous mode
[ 85.400066][ T5898] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 85.412998][ T5898] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 85.424424][ T5898] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 85.436123][ T5898] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 85.521968][ T5898] 8021q: adding VLAN 0 to HW filter on device bond0
[ 85.547192][ T5898] 8021q: adding VLAN 0 to HW filter on device team0
[ 85.560606][ T50] bridge0: port 1(bridge_slave_0) entered blocking state
[ 85.568229][ T50] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 85.584462][ T12] bridge0: port 2(bridge_slave_1) entered blocking state
[ 85.591858][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 85.750952][ T5898] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 85.803096][ T5898] veth0_vlan: entered promiscuous mode
[ 85.815451][ T5898] veth1_vlan: entered promiscuous mode
[ 85.844263][ T5898] veth0_macvtap: entered promiscuous mode
[ 85.854481][ T5898] veth1_macvtap: entered promiscuous mode
[ 85.880415][ T5898] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 85.896377][ T5898] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 85.912451][ T1139] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.922160][ T1139] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.932318][ T1139] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.942680][ T1139] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 86.077658][ T1139] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 86.080701][ T5921] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 86.099770][ T5921] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 86.108926][ T5921] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 86.117572][ T5921] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 86.126744][ T5921] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 86.160174][ T1139] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 86.253604][ T1139] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 86.360977][ T1139] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 86.917178][ T43] cfg80211: failed to load regulatory.db
2025/11/17 03:07:42 executed programs: 0
[ 87.171119][ T5921] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 87.180319][ T5921] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 87.190394][ T5921] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 87.199300][ T5921] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 87.207527][ T5921] ==================================================================
[ 87.216055][ T5921] BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0
[ 87.223744][ T5921] Read of size 2 at addr ffff888032860df8 by task kworker/u9:2/5921
[ 87.231970][ T5921]
[ 87.234307][ T5921] CPU: 0 UID: 0 PID: 5921 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full)
[ 87.234320][ T5921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 87.234328][ T5921] Workqueue: hci0 hci_cmd_work
[ 87.234351][ T5921] Call Trace:
[ 87.234358][ T5921]
[ 87.234364][ T5921] dump_stack_lvl+0x189/0x250
[ 87.234380][ T5921] ? __virt_addr_valid+0x1c8/0x5c0
[ 87.234391][ T5921] ? rcu_is_watching+0x15/0xb0
[ 87.234400][ T5921] ? __pfx_dump_stack_lvl+0x10/0x10
[ 87.234413][ T5921] ? rcu_is_watching+0x15/0xb0
[ 87.234421][ T5921] ? lock_release+0x4b/0x3d0
[ 87.234433][ T5921] ? _raw_spin_lock_irqsave+0xb3/0xf0
[ 87.234444][ T5921] ? __virt_addr_valid+0x1c8/0x5c0
[ 87.234454][ T5921] ? __virt_addr_valid+0x4a5/0x5c0
[ 87.234463][ T5921] print_report+0xca/0x240
[ 87.234476][ T5921] ? hci_cmd_work+0x5d0/0x7b0
[ 87.234486][ T5921] kasan_report+0x118/0x150
[ 87.234499][ T5921] ? hci_cmd_work+0x5d0/0x7b0
[ 87.234512][ T5921] hci_cmd_work+0x5d0/0x7b0
[ 87.234526][ T5921] ? process_one_work+0x868/0x15e0
[ 87.234538][ T5921] process_one_work+0x93a/0x15e0
[ 87.234549][ T5921] ? __lock_acquire+0xab9/0xd20
[ 87.234564][ T5921] ? __pfx_process_one_work+0x10/0x10
[ 87.234577][ T5921] ? assign_work+0x3a1/0x410
[ 87.234589][ T5921] worker_thread+0x9b0/0xee0
[ 87.234622][ T5921] kthread+0x711/0x8a0
[ 87.234632][ T5921] ? __pfx_worker_thread+0x10/0x10
[ 87.234644][ T5921] ? __pfx_kthread+0x10/0x10
[ 87.234652][ T5921] ? _raw_spin_unlock_irq+0x23/0x50
[ 87.234661][ T5921] ? lockdep_hardirqs_on+0x9c/0x150
[ 87.234671][ T5921] ? __pfx_kthread+0x10/0x10
[ 87.234680][ T5921] ret_from_fork+0x599/0xb30
[ 87.234693][ T5921] ? __pfx_ret_from_fork+0x10/0x10
[ 87.234706][ T5921] ? __switch_to_asm+0x39/0x70
[ 87.234714][ T5921] ? __switch_to_asm+0x33/0x70
[ 87.234723][ T5921] ? __pfx_kthread+0x10/0x10
[ 87.234731][ T5921] ret_from_fork_asm+0x1a/0x30
[ 87.234744][ T5921]
[ 87.234748][ T5921]
[ 87.429187][ T5921] Allocated by task 5148:
[ 87.433741][ T5921] kasan_save_track+0x3e/0x80
[ 87.438522][ T5921] __kasan_slab_alloc+0x6c/0x80
[ 87.443867][ T5921] kmem_cache_alloc_node_noprof+0x43c/0x710
[ 87.449919][ T5921] __alloc_skb+0x112/0x2d0
[ 87.454409][ T5921] hci_cmd_sync_alloc+0x3d/0x3b0
[ 87.459444][ T5921] __hci_cmd_sync_sk+0x1a7/0xc70
[ 87.464989][ T5921] hci_read_num_supported_iac_sync+0x2c/0x120
[ 87.471150][ T5921] hci_dev_open_sync+0x243b/0x2dc0
[ 87.476604][ T5921] hci_power_on+0x1b4/0x720
[ 87.481380][ T5921] process_one_work+0x93a/0x15e0
[ 87.486566][ T5921] worker_thread+0x9b0/0xee0
[ 87.491332][ T5921] kthread+0x711/0x8a0
[ 87.495500][ T5921] ret_from_fork+0x599/0xb30
[ 87.500089][ T5921] ret_from_fork_asm+0x1a/0x30
[ 87.504927][ T5921]
[ 87.507254][ T5921] Freed by task 5941:
[ 87.511388][ T5921] kasan_save_track+0x3e/0x80
[ 87.516316][ T5921] kasan_save_free_info+0x46/0x50
[ 87.521674][ T5921] __kasan_slab_free+0x5c/0x80
[ 87.526604][ T5921] kmem_cache_free+0x197/0x640
[ 87.531691][ T5921] vhci_read+0x49a/0x5b0
[ 87.536187][ T5921] vfs_read+0x200/0xa30
[ 87.540354][ T5921] ksys_read+0x145/0x250
[ 87.544728][ T5921] do_syscall_64+0xfa/0xfa0
[ 87.549245][ T5921] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.555143][ T5921]
[ 87.557653][ T5921] The buggy address belongs to the object at ffff888032860dc0
[ 87.557653][ T5921] which belongs to the cache skbuff_head_cache of size 240
[ 87.572568][ T5921] The buggy address is located 56 bytes inside of
[ 87.572568][ T5921] freed 240-byte region [ffff888032860dc0, ffff888032860eb0)
[ 87.586448][ T5921]
[ 87.588848][ T5921] The buggy address belongs to the physical page:
[ 87.596071][ T5921] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32860
[ 87.605028][ T5921] anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
[ 87.613117][ T5921] page_type: f5(slab)
[ 87.617281][ T5921] raw: 00fff00000000000 ffff88801e6a6a00 0000000000000000 dead000000000001
[ 87.626049][ T5921] raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000
[ 87.634875][ T5921] page dumped because: kasan: bad access detected
[ 87.641461][ T5921] page_owner tracks the page as allocated
[ 87.647339][ T5921] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5197, tgid 5197 (udevd), ts 30354371909, free_ts 29959051150
[ 87.666277][ T5921] post_alloc_hook+0x240/0x2a0
[ 87.671040][ T5921] get_page_from_freelist+0x2365/0x2440
[ 87.676572][ T5921] __alloc_frozen_pages_noprof+0x181/0x370
[ 87.682364][ T5921] alloc_pages_mpol+0x232/0x4a0
[ 87.687206][ T5921] allocate_slab+0x86/0x3b0
[ 87.691786][ T5921] ___slab_alloc+0xf56/0x1990
[ 87.696546][ T5921] __slab_alloc+0x65/0x100
[ 87.701042][ T5921] kmem_cache_alloc_node_noprof+0x4ce/0x710
[ 87.707215][ T5921] __alloc_skb+0x112/0x2d0
[ 87.711667][ T5921] netlink_sendmsg+0x5c6/0xb30
[ 87.716588][ T5921] __sock_sendmsg+0x21c/0x270
[ 87.721512][ T5921] ____sys_sendmsg+0x505/0x870
[ 87.726348][ T5921] ___sys_sendmsg+0x21f/0x2a0
[ 87.731098][ T5921] __x64_sys_sendmsg+0x19b/0x260
[ 87.736024][ T5921] do_syscall_64+0xfa/0xfa0
[ 87.740601][ T5921] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.746683][ T5921] page last free pid 5205 tgid 5205 stack trace:
[ 87.753693][ T5921] __free_frozen_pages+0xbc8/0xd30
[ 87.759142][ T5921] __put_partials+0x146/0x170
[ 87.763983][ T5921] put_cpu_partial+0x1f2/0x2e0
[ 87.768907][ T5921] __slab_free+0x288/0x2a0
[ 87.773427][ T5921] qlist_free_all+0x97/0x100
[ 87.778201][ T5921] kasan_quarantine_reduce+0x148/0x160
[ 87.783840][ T5921] __kasan_slab_alloc+0x22/0x80
[ 87.788872][ T5921] kmem_cache_alloc_noprof+0x37d/0x700
[ 87.794576][ T5921] security_file_alloc+0x34/0x330
[ 87.799679][ T5921] init_file+0x93/0x2f0
[ 87.804126][ T5921] alloc_empty_file+0x6e/0x1d0
[ 87.808962][ T5921] path_openat+0xff/0x3860
[ 87.813450][ T5921] do_filp_open+0x1fa/0x410
[ 87.818109][ T5921] do_sys_openat2+0x121/0x1c0
[ 87.822858][ T5921] __x64_sys_openat+0x138/0x170
[ 87.827924][ T5921] do_syscall_64+0xfa/0xfa0
[ 87.832616][ T5921]
[ 87.834924][ T5921] Memory state around the buggy address:
[ 87.840537][ T5921] ffff888032860c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.848757][ T5921] ffff888032860d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
[ 87.856922][ T5921] >ffff888032860d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[ 87.865061][ T5921] ^
[ 87.873146][ T5921] ffff888032860e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 87.881459][ T5921] ffff888032860e80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
[ 87.889851][ T5921] ==================================================================
[ 87.903494][ T5921] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 87.910997][ T5921] CPU: 0 UID: 0 PID: 5921 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full)
[ 87.920481][ T5921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 87.930891][ T5921] Workqueue: hci0 hci_cmd_work
[ 87.935901][ T5921] Call Trace:
[ 87.939166][ T5921]
[ 87.942188][ T5921] dump_stack_lvl+0x99/0x250
[ 87.946770][ T5921] ? __asan_memcpy+0x40/0x70
[ 87.951347][ T5921] ? __pfx_dump_stack_lvl+0x10/0x10
[ 87.956641][ T5921] ? __pfx__printk+0x10/0x10
[ 87.961518][ T5921] vpanic+0x237/0x6d0
[ 87.965584][ T5921] ? __pfx_vpanic+0x10/0x10
[ 87.970094][ T5921] ? preempt_schedule+0xae/0xc0
[ 87.975038][ T5921] ? __pfx_preempt_schedule+0x10/0x10
[ 87.980413][ T5921] panic+0xb9/0xc0
[ 87.984119][ T5921] ? __pfx_panic+0x10/0x10
[ 87.988520][ T5921] ? _raw_spin_unlock_irqrestore+0xfd/0x110
[ 87.994664][ T5921] ? is_module_address+0x17/0xf0
[ 87.999705][ T5921] ? hci_cmd_work+0x5d0/0x7b0
[ 88.004542][ T5921] check_panic_on_warn+0x89/0xb0
[ 88.009467][ T5921] ? hci_cmd_work+0x5d0/0x7b0
[ 88.014390][ T5921] end_report+0x6f/0x160
[ 88.019242][ T5921] kasan_report+0x129/0x150
[ 88.023998][ T5921] ? hci_cmd_work+0x5d0/0x7b0
[ 88.028871][ T5921] hci_cmd_work+0x5d0/0x7b0
[ 88.033388][ T5921] ? process_one_work+0x868/0x15e0
[ 88.038746][ T5921] process_one_work+0x93a/0x15e0
[ 88.043683][ T5921] ? __lock_acquire+0xab9/0xd20
[ 88.048554][ T5921] ? __pfx_process_one_work+0x10/0x10
[ 88.054038][ T5921] ? assign_work+0x3a1/0x410
[ 88.058724][ T5921] worker_thread+0x9b0/0xee0
[ 88.063444][ T5921] kthread+0x711/0x8a0
[ 88.067628][ T5921] ? __pfx_worker_thread+0x10/0x10
[ 88.072912][ T5921] ? __pfx_kthread+0x10/0x10
[ 88.077487][ T5921] ? _raw_spin_unlock_irq+0x23/0x50
[ 88.082788][ T5921] ? lockdep_hardirqs_on+0x9c/0x150
[ 88.088024][ T5921] ? __pfx_kthread+0x10/0x10
[ 88.092630][ T5921] ret_from_fork+0x599/0xb30
[ 88.097313][ T5921] ? __pfx_ret_from_fork+0x10/0x10
[ 88.102592][ T5921] ? __switch_to_asm+0x39/0x70
[ 88.107439][ T5921] ? __switch_to_asm+0x33/0x70
[ 88.112189][ T5921] ? __pfx_kthread+0x10/0x10
[ 88.116937][ T5921] ret_from_fork_asm+0x1a/0x30
[ 88.121781][ T5921]
[ 88.125442][ T5921] Kernel Offset: disabled
[ 88.129842][ T5921] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1788329321=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=)
HEAD detached at 9832ed61a
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=9832ed61ae41048a549b0194edc9dcade0851e76 -X github.com/google/syzkaller/prog.gitRevisionDate=20251020-171305" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=9832ed61ae41048a549b0194edc9dcade0851e76 -X github.com/google/syzkaller/prog.gitRevisionDate=20251020-171305" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=9832ed61ae41048a549b0194edc9dcade0851e76 -X github.com/google/syzkaller/prog.gitRevisionDate=20251020-171305" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"9832ed61ae41048a549b0194edc9dcade0851e76\"
/usr/bin/ld: /tmp/cczocY8X.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null