KASAN: slab-use-after-free Read in hci_cmd_work
Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
==================================================================
BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0 net/bluetooth/hci_core.c:4174
Read of size 2 at addr ffff88801eaec038 by task kworker/u9:0/51
CPU: 0 UID: 0 PID: 51 Comm: kworker/u9:0 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 5151:
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_bd_addr_sync net/bluetooth/hci_sync.c:3641 [inline]
hci_init_stage_sync net/bluetooth/hci_sync.c:3623 [inline]
hci_init1_sync net/bluetooth/hci_sync.c:3755 [inline]
hci_init_sync net/bluetooth/hci_sync.c:4874 [inline]
hci_dev_init_sync net/bluetooth/hci_sync.c:5066 [inline]
hci_dev_open_sync+0x1756/0x2dc0 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 5913:
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 ffff88801eaec000
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 56 bytes inside of
freed 240-byte region [ffff88801eaec000, ffff88801eaec0f0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1eaec
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881412dca00 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 3865083644, free_ts 3853822077
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
__kmem_cache_alloc_bulk+0x1d9/0x550 mm/slub.c:7424
kmem_cache_alloc_bulk_noprof+0x3c6/0x730 mm/slub.c:7490
napi_skb_cache_get+0x3a5/0x6b0 net/core/skbuff.c:290
__alloc_skb+0x11e/0x2d0 net/core/skbuff.c:662
napi_alloc_skb+0x84/0x7d0 net/core/skbuff.c:816
napi_get_frags+0x69/0x140 net/core/gro.c:681
napi_get_frags_check net/core/dev.c:7478 [inline]
netif_napi_add_weight_locked+0x545/0x940 net/core/dev.c:7518
netif_napi_add_weight include/linux/netdevice.h:2806 [inline]
netif_napi_add include/linux/netdevice.h:2823 [inline]
gro_cells_init+0x211/0x290 net/core/gro_cells.c:94
xfrm_input_init+0x34/0x250 net/xfrm/xfrm_input.c:833
xfrm_init+0x32/0x50 net/xfrm/xfrm_policy.c:4406
page last free pid 1 tgid 1 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
__kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline]
__kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:579 [inline]
alloc_vmap_area+0xdca/0x1500 mm/vmalloc.c:2124
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3219
__vmalloc_node_range_noprof+0x371/0x16a0 mm/vmalloc.c:4009
vmalloc_huge_node_noprof+0xd4/0x130 mm/vmalloc.c:4166
vmalloc_huge include/linux/vmalloc.h:189 [inline]
alloc_large_system_hash+0x18c/0x420 mm/mm_init.c:2454
ip_rt_init+0xb3/0x3a0 net/ipv4/route.c:3728
ip_init+0x9/0x20 net/ipv4/ip_output.c:1685
inet_init+0x31b/0x430 net/ipv4/af_inet.c:1987
do_one_initcall+0x1fb/0x870 init/main.c:1378
do_initcall_level+0x104/0x190 init/main.c:1440
do_initcalls+0x59/0xa0 init/main.c:1456
kernel_init_freeable+0x334/0x4b0 init/main.c:1688
kernel_init+0x1d/0x1d0 init/main.c:1578
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
Memory state around the buggy address:
ffff88801eaebf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
ffff88801eaebf80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
>ffff88801eaec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801eaec080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff88801eaec100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
==================================================================
Warning: Permanently added '10.128.0.184' (ED25519) to the list of known hosts.
2025/11/17 11:53:07 parsed 1 programs
[ 77.664952][ T5833] cgroup: Unknown subsys name 'net'
[ 77.854581][ T5833] cgroup: Unknown subsys name 'cpuset'
[ 77.863056][ T5833] cgroup: Unknown subsys name 'rlimit'
[ 79.378724][ T5833] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 82.227142][ T3547] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 82.235538][ T3547] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 82.260238][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 82.269136][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 82.306697][ T5847] 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.
[ 84.048149][ T5884] chnl_net:caif_netlink_parms(): no params data found
[ 84.124118][ T5884] bridge0: port 1(bridge_slave_0) entered blocking state
[ 84.132159][ T5884] bridge0: port 1(bridge_slave_0) entered disabled state
[ 84.139476][ T5884] bridge_slave_0: entered allmulticast mode
[ 84.147081][ T5884] bridge_slave_0: entered promiscuous mode
[ 84.159145][ T5884] bridge0: port 2(bridge_slave_1) entered blocking state
[ 84.166875][ T5884] bridge0: port 2(bridge_slave_1) entered disabled state
[ 84.176543][ T5884] bridge_slave_1: entered allmulticast mode
[ 84.183706][ T5884] bridge_slave_1: entered promiscuous mode
[ 84.215165][ T5884] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 84.226687][ T5884] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 84.256685][ T5884] team0: Port device team_slave_0 added
[ 84.265653][ T5884] team0: Port device team_slave_1 added
[ 84.290761][ T5884] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 84.298363][ T5884] 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.
[ 84.325451][ T5884] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 84.338138][ T5884] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 84.345427][ T5884] 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.
[ 84.371479][ T5884] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 84.415211][ T5884] hsr_slave_0: entered promiscuous mode
[ 84.422032][ T5884] hsr_slave_1: entered promiscuous mode
[ 84.556291][ T5884] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 84.568058][ T5884] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 84.577901][ T5884] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 84.588275][ T5884] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 84.662511][ T5884] 8021q: adding VLAN 0 to HW filter on device bond0
[ 84.686177][ T5884] 8021q: adding VLAN 0 to HW filter on device team0
[ 84.699160][ T492] bridge0: port 1(bridge_slave_0) entered blocking state
[ 84.706457][ T492] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 84.723172][ T13] bridge0: port 2(bridge_slave_1) entered blocking state
[ 84.730405][ T13] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 84.888039][ T5884] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 84.934413][ T5884] veth0_vlan: entered promiscuous mode
[ 84.947013][ T5884] veth1_vlan: entered promiscuous mode
[ 84.978070][ T5884] veth0_macvtap: entered promiscuous mode
[ 84.988215][ T5884] veth1_macvtap: entered promiscuous mode
[ 85.009557][ T5884] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 85.023668][ T5884] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 85.039382][ T492] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.049927][ T492] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.060721][ T492] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.072159][ T492] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 85.221882][ T13] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 85.290410][ T13] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 85.372334][ T13] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 85.420345][ T51] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 85.434062][ T51] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 85.442809][ T51] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 85.450658][ T51] ==================================================================
[ 85.458775][ T51] BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0
[ 85.466227][ T51] Read of size 2 at addr ffff88801eaec038 by task kworker/u9:0/51
[ 85.474019][ T51]
[ 85.476356][ T51] CPU: 0 UID: 0 PID: 51 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full)
[ 85.476369][ T51] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 85.476375][ T51] Workqueue: hci0 hci_cmd_work
[ 85.476400][ T51] Call Trace:
[ 85.476407][ T51]
[ 85.476412][ T51] dump_stack_lvl+0x189/0x250
[ 85.476427][ T51] ? __virt_addr_valid+0x1c8/0x5c0
[ 85.476437][ T51] ? rcu_is_watching+0x15/0xb0
[ 85.476446][ T51] ? __pfx_dump_stack_lvl+0x10/0x10
[ 85.476458][ T51] ? rcu_is_watching+0x15/0xb0
[ 85.476466][ T51] ? lock_release+0x4b/0x3d0
[ 85.476479][ T51] ? _raw_spin_lock_irqsave+0xb3/0xf0
[ 85.476491][ T51] ? __virt_addr_valid+0x1c8/0x5c0
[ 85.476500][ T51] ? __virt_addr_valid+0x4a5/0x5c0
[ 85.476509][ T51] print_report+0xca/0x240
[ 85.476521][ T51] ? hci_cmd_work+0x5d0/0x7b0
[ 85.476533][ T51] kasan_report+0x118/0x150
[ 85.476546][ T51] ? hci_cmd_work+0x5d0/0x7b0
[ 85.476561][ T51] hci_cmd_work+0x5d0/0x7b0
[ 85.476574][ T51] ? process_one_work+0x868/0x15e0
[ 85.476586][ T51] process_one_work+0x93a/0x15e0
[ 85.476597][ T51] ? __lock_acquire+0xab9/0xd20
[ 85.476613][ T51] ? __pfx_process_one_work+0x10/0x10
[ 85.476625][ T51] ? assign_work+0x3a1/0x410
[ 85.476637][ T51] worker_thread+0x9b0/0xee0
[ 85.476654][ T51] kthread+0x711/0x8a0
[ 85.476663][ T51] ? __pfx_worker_thread+0x10/0x10
[ 85.476675][ T51] ? __pfx_kthread+0x10/0x10
[ 85.476683][ T51] ? _raw_spin_unlock_irq+0x23/0x50
[ 85.476693][ T51] ? lockdep_hardirqs_on+0x9c/0x150
[ 85.476706][ T51] ? __pfx_kthread+0x10/0x10
[ 85.476714][ T51] ret_from_fork+0x599/0xb30
[ 85.476726][ T51] ? __pfx_ret_from_fork+0x10/0x10
[ 85.476739][ T51] ? __switch_to_asm+0x39/0x70
[ 85.476747][ T51] ? __switch_to_asm+0x33/0x70
[ 85.476756][ T51] ? __pfx_kthread+0x10/0x10
[ 85.476764][ T51] ret_from_fork_asm+0x1a/0x30
[ 85.476776][ T51]
[ 85.476780][ T51]
[ 85.666237][ T51] Allocated by task 5151:
[ 85.670632][ T51] kasan_save_track+0x3e/0x80
[ 85.675288][ T51] __kasan_slab_alloc+0x6c/0x80
[ 85.680113][ T51] kmem_cache_alloc_node_noprof+0x43c/0x710
[ 85.685981][ T51] __alloc_skb+0x112/0x2d0
[ 85.690372][ T51] hci_cmd_sync_alloc+0x3d/0x3b0
[ 85.695288][ T51] __hci_cmd_sync_sk+0x1a7/0xc70
[ 85.700238][ T51] hci_dev_open_sync+0x1756/0x2dc0
[ 85.705339][ T51] hci_power_on+0x1b4/0x720
[ 85.709830][ T51] process_one_work+0x93a/0x15e0
[ 85.714892][ T51] worker_thread+0x9b0/0xee0
[ 85.719474][ T51] kthread+0x711/0x8a0
[ 85.723608][ T51] ret_from_fork+0x599/0xb30
[ 85.728278][ T51] ret_from_fork_asm+0x1a/0x30
[ 85.733024][ T51]
[ 85.735343][ T51] Freed by task 5913:
[ 85.739379][ T51] kasan_save_track+0x3e/0x80
[ 85.744096][ T51] kasan_save_free_info+0x46/0x50
[ 85.749106][ T51] __kasan_slab_free+0x5c/0x80
[ 85.753852][ T51] kmem_cache_free+0x197/0x640
[ 85.758598][ T51] vhci_read+0x49a/0x5b0
[ 85.762878][ T51] vfs_read+0x200/0xa30
[ 85.767016][ T51] ksys_read+0x145/0x250
[ 85.771530][ T51] do_syscall_64+0xfa/0xfa0
[ 85.776105][ T51] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 85.781976][ T51]
[ 85.784275][ T51] The buggy address belongs to the object at ffff88801eaec000
[ 85.784275][ T51] which belongs to the cache skbuff_head_cache of size 240
[ 85.798958][ T51] The buggy address is located 56 bytes inside of
[ 85.798958][ T51] freed 240-byte region [ffff88801eaec000, ffff88801eaec0f0)
[ 85.812874][ T51]
[ 85.815193][ T51] The buggy address belongs to the physical page:
[ 85.821604][ T51] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1eaec
[ 85.830472][ T51] anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
[ 85.838024][ T51] page_type: f5(slab)
[ 85.841996][ T51] raw: 00fff00000000000 ffff8881412dca00 0000000000000000 dead000000000001
[ 85.850678][ T51] raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000
[ 85.859282][ T51] page dumped because: kasan: bad access detected
[ 85.865768][ T51] page_owner tracks the page as allocated
[ 85.871458][ T51] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 3865083644, free_ts 3853822077
[ 85.889941][ T51] post_alloc_hook+0x240/0x2a0
[ 85.894698][ T51] get_page_from_freelist+0x2365/0x2440
[ 85.900315][ T51] __alloc_frozen_pages_noprof+0x181/0x370
[ 85.906196][ T51] alloc_pages_mpol+0x232/0x4a0
[ 85.911039][ T51] allocate_slab+0x86/0x3b0
[ 85.915529][ T51] ___slab_alloc+0xf56/0x1990
[ 85.920187][ T51] __kmem_cache_alloc_bulk+0x1d9/0x550
[ 85.925825][ T51] kmem_cache_alloc_bulk_noprof+0x3c6/0x730
[ 85.931801][ T51] napi_skb_cache_get+0x3a5/0x6b0
[ 85.937008][ T51] __alloc_skb+0x11e/0x2d0
[ 85.941420][ T51] napi_alloc_skb+0x84/0x7d0
[ 85.946007][ T51] napi_get_frags+0x69/0x140
[ 85.950587][ T51] netif_napi_add_weight_locked+0x545/0x940
[ 85.956464][ T51] gro_cells_init+0x211/0x290
[ 85.961131][ T51] xfrm_input_init+0x34/0x250
[ 85.965794][ T51] xfrm_init+0x32/0x50
[ 85.969862][ T51] page last free pid 1 tgid 1 stack trace:
[ 85.975728][ T51] __free_frozen_pages+0xbc8/0xd30
[ 85.980822][ T51] __kasan_populate_vmalloc+0x1b2/0x1d0
[ 85.986355][ T51] alloc_vmap_area+0xdca/0x1500
[ 85.991202][ T51] __get_vm_area_node+0x1f8/0x300
[ 85.996326][ T51] __vmalloc_node_range_noprof+0x371/0x16a0
[ 86.002212][ T51] vmalloc_huge_node_noprof+0xd4/0x130
[ 86.007744][ T51] alloc_large_system_hash+0x18c/0x420
[ 86.013268][ T51] ip_rt_init+0xb3/0x3a0
[ 86.017494][ T51] ip_init+0x9/0x20
[ 86.021276][ T51] inet_init+0x31b/0x430
[ 86.025497][ T51] do_one_initcall+0x1fb/0x870
[ 86.030428][ T51] do_initcall_level+0x104/0x190
[ 86.035360][ T51] do_initcalls+0x59/0xa0
[ 86.039681][ T51] kernel_init_freeable+0x334/0x4b0
[ 86.044951][ T51] kernel_init+0x1d/0x1d0
[ 86.049261][ T51] ret_from_fork+0x599/0xb30
[ 86.053919][ T51]
[ 86.056232][ T51] Memory state around the buggy address:
[ 86.061833][ T51] ffff88801eaebf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
[ 86.069975][ T51] ffff88801eaebf80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
[ 86.078196][ T51] >ffff88801eaec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 86.086234][ T51] ^
[ 86.092207][ T51] ffff88801eaec080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
[ 86.100257][ T51] ffff88801eaec100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
[ 86.108325][ T51] ==================================================================
[ 86.118449][ T51] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 86.125685][ T51] CPU: 0 UID: 0 PID: 51 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full)
[ 86.135011][ T51] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 86.145138][ T51] Workqueue: hci0 hci_cmd_work
[ 86.149894][ T51] Call Trace:
[ 86.153165][ T51]
[ 86.156090][ T51] dump_stack_lvl+0x99/0x250
[ 86.160748][ T51] ? __asan_memcpy+0x40/0x70
[ 86.165317][ T51] ? __pfx_dump_stack_lvl+0x10/0x10
[ 86.170500][ T51] ? __pfx__printk+0x10/0x10
[ 86.175090][ T51] vpanic+0x237/0x6d0
[ 86.179049][ T51] ? __pfx_vpanic+0x10/0x10
[ 86.183523][ T51] ? preempt_schedule+0xae/0xc0
[ 86.188350][ T51] ? __pfx_preempt_schedule+0x10/0x10
[ 86.193698][ T51] panic+0xb9/0xc0
[ 86.197394][ T51] ? __pfx_panic+0x10/0x10
[ 86.201785][ T51] ? _raw_spin_unlock_irqrestore+0xfd/0x110
[ 86.207746][ T51] ? is_module_address+0x17/0xf0
[ 86.212745][ T51] ? hci_cmd_work+0x5d0/0x7b0
[ 86.217422][ T51] check_panic_on_warn+0x89/0xb0
[ 86.222355][ T51] ? hci_cmd_work+0x5d0/0x7b0
[ 86.227036][ T51] end_report+0x6f/0x160
[ 86.231269][ T51] kasan_report+0x129/0x150
[ 86.235764][ T51] ? hci_cmd_work+0x5d0/0x7b0
[ 86.240430][ T51] hci_cmd_work+0x5d0/0x7b0
[ 86.244921][ T51] ? process_one_work+0x868/0x15e0
[ 86.250023][ T51] process_one_work+0x93a/0x15e0
[ 86.254943][ T51] ? __lock_acquire+0xab9/0xd20
[ 86.259783][ T51] ? __pfx_process_one_work+0x10/0x10
[ 86.265142][ T51] ? assign_work+0x3a1/0x410
[ 86.269715][ T51] worker_thread+0x9b0/0xee0
[ 86.274297][ T51] kthread+0x711/0x8a0
[ 86.278353][ T51] ? __pfx_worker_thread+0x10/0x10
[ 86.283449][ T51] ? __pfx_kthread+0x10/0x10
[ 86.288031][ T51] ? _raw_spin_unlock_irq+0x23/0x50
[ 86.293212][ T51] ? lockdep_hardirqs_on+0x9c/0x150
[ 86.298391][ T51] ? __pfx_kthread+0x10/0x10
[ 86.302964][ T51] ret_from_fork+0x599/0xb30
[ 86.307547][ T51] ? __pfx_ret_from_fork+0x10/0x10
[ 86.312649][ T51] ? __switch_to_asm+0x39/0x70
[ 86.317396][ T51] ? __switch_to_asm+0x33/0x70
[ 86.322314][ T51] ? __pfx_kthread+0x10/0x10
[ 86.326888][ T51] ret_from_fork_asm+0x1a/0x30
[ 86.331644][ T51]
[ 86.335016][ T51] Kernel Offset: disabled
[ 86.339337][ T51] 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-build1832356204=/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 19568248c
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=19568248c8bdb031004760d49df5045a85aa517b -X github.com/google/syzkaller/prog.gitRevisionDate=20251015-123818" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=19568248c8bdb031004760d49df5045a85aa517b -X github.com/google/syzkaller/prog.gitRevisionDate=20251015-123818" ./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=19568248c8bdb031004760d49df5045a85aa517b -X github.com/google/syzkaller/prog.gitRevisionDate=20251015-123818" -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=\"19568248c8bdb031004760d49df5045a85aa517b\"
/usr/bin/ld: /tmp/ccoUeD7P.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