Extracting prog: 1m37.914750421s
Minimizing prog: 1m18.034305198s
Simplifying prog options: 1m52.481889953s
Extracting C: 36.85555573s
Simplifying C: 0s


1 programs, 3 VMs, timeouts [15s 6m0s]
extracting reproducer from 1 programs
single: executing 1 programs separately with timeout 15s
testing program (duration=15s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
detailed listing:
executing program 0:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
bind$can_raw(r0, &(0x7f0000000040), 0x10)

program crashed: KASAN: slab-use-after-free Read in __hci_req_sync
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=22.5s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw
detailed listing:
executing program 0:
socket$can_raw(0x1d, 0x3, 0x1)

program did not crash
testing program (duration=22.5s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bind$can_raw
detailed listing:
executing program 0:
bind$can_raw(0xffffffffffffffff, &(0x7f0000000040), 0x10)

program did not crash
testing program (duration=22.5s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
detailed listing:
executing program 0:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
bind$can_raw(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=22.5s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
program did not crash
simplifying guilty program options
testing program (duration=22.5s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
detailed listing:
executing program 0:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
bind$can_raw(r0, &(0x7f0000000040), 0x10)

program did not crash
testing program (duration=22.5s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
detailed listing:
executing program 0:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
bind$can_raw(r0, &(0x7f0000000040), 0x10)

program did not crash
testing program (duration=22.5s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_raw-bind$can_raw
detailed listing:
executing program 0:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
bind$can_raw(r0, &(0x7f0000000040), 0x10)

program did not crash
reproducing took 5m25.286515422s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in refcount_read include/linux/refcount.h:136 [inline]
BUG: KASAN: slab-use-after-free in skb_unref include/linux/skbuff.h:1222 [inline]
BUG: KASAN: slab-use-after-free in __kfree_skb_reason net/core/skbuff.c:1195 [inline]
BUG: KASAN: slab-use-after-free in kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222
Read of size 4 at addr ffff888020cdeea4 by task syz-executor/5296

CPU: 0 PID: 5296 Comm: syz-executor Not tainted 6.10.0-rc6-syzkaller-00051-g1dfe225e9af5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 refcount_read include/linux/refcount.h:136 [inline]
 skb_unref include/linux/skbuff.h:1222 [inline]
 __kfree_skb_reason net/core/skbuff.c:1195 [inline]
 kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222
 kfree_skb include/linux/skbuff.h:1257 [inline]
 __hci_req_sync+0x61d/0x980 net/bluetooth/hci_request.c:184
 hci_req_sync+0x97/0xd0 net/bluetooth/hci_request.c:206
 hci_dev_cmd+0x634/0x960 net/bluetooth/hci_core.c:787
 hci_sock_ioctl+0x4f3/0x880 net/bluetooth/hci_sock.c:1150
 sock_do_ioctl+0x116/0x280 net/socket.c:1222
 sock_ioctl+0x22e/0x6c0 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c27975adb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffc01cb4450 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3c27975adb
RDX: 00007ffc01cb44c8 RSI: 00000000400448dd RDI: 0000000000000003
RBP: 000055558f1d34a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000002 R14: 0000000000000009 R15: 0000000000000009
 </TASK>

Allocated by task 65:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4009
 skb_clone+0x190/0x3f0 net/core/skbuff.c:2052
 hci_send_cmd_sync net/bluetooth/hci_core.c:4123 [inline]
 hci_cmd_work+0x66a/0x710 net/bluetooth/hci_core.c:4143
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5300:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2196 [inline]
 slab_free mm/slub.c:4438 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4513
 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131
 __kfree_skb net/core/skbuff.c:1188 [inline]
 kfree_skb_reason+0x138/0x210 net/core/skbuff.c:1223
 kfree_skb include/linux/skbuff.h:1257 [inline]
 hci_req_sync_complete+0x16c/0x270 net/bluetooth/hci_request.c:109
 hci_event_packet+0x963/0x1170 net/bluetooth/hci_event.c:7479
 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff888020cdedc0
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 228 bytes inside of
 freed 240-byte region [ffff888020cdedc0, ffff888020cdeeb0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20cde
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888018ed8780 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080190019 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888018ed8780 dead000000000122 0000000000000000
head: 0000000000000000 0000000080190019 00000001ffffefff 0000000000000000
head: 00fff00000000001 ffffea0000833781 ffffffffffffffff 0000000000000000
head: ffff888000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5243, tgid 5243 (kworker/u33:2), ts 57040075623, free_ts 56147367857
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x1353/0x2e50 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4683
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x56/0x110 mm/slub.c:2265
 allocate_slab mm/slub.c:2428 [inline]
 new_slab+0x84/0x260 mm/slub.c:2481
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3990 [inline]
 kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4009
 skb_clone+0x190/0x3f0 net/core/skbuff.c:2052
 hci_event_packet+0x14f/0x1170 net/bluetooth/hci_event.c:7435
 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page last free pid 5229 tgid 5229 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2588
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 __do_kmalloc_node mm/slub.c:4122 [inline]
 __kmalloc_noprof+0x19d/0x410 mm/slub.c:4136
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 new_dir fs/proc/proc_sysctl.c:953 [inline]
 get_subdir fs/proc/proc_sysctl.c:997 [inline]
 sysctl_mkdir_p fs/proc/proc_sysctl.c:1292 [inline]
 __register_sysctl_table+0xdde/0x1790 fs/proc/proc_sysctl.c:1373
 __addrconf_sysctl_register+0x1a3/0x360 net/ipv6/addrconf.c:7215
 addrconf_sysctl_register net/ipv6/addrconf.c:7263 [inline]
 addrconf_sysctl_register+0x15f/0x1f0 net/ipv6/addrconf.c:7252
 ipv6_add_dev+0x9d7/0x1400 net/ipv6/addrconf.c:456
 addrconf_notify+0x546/0x19e0 net/ipv6/addrconf.c:3652
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 register_netdevice+0x15fb/0x1cb0 net/core/dev.c:10408
 register_vlan_dev+0x372/0x940 net/8021q/vlan.c:179
 vlan_newlink+0x413/0x6b0 net/8021q/vlan_netlink.c:193
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink+0x1197/0x1960 net/core/rtnetlink.c:3730

Memory state around the buggy address:
 ffff888020cded80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888020cdee00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888020cdee80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888020cdef00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888020cdef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in refcount_read include/linux/refcount.h:136 [inline]
BUG: KASAN: slab-use-after-free in skb_unref include/linux/skbuff.h:1222 [inline]
BUG: KASAN: slab-use-after-free in __kfree_skb_reason net/core/skbuff.c:1195 [inline]
BUG: KASAN: slab-use-after-free in kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222
Read of size 4 at addr ffff888020cdeea4 by task syz-executor/5296

CPU: 0 PID: 5296 Comm: syz-executor Not tainted 6.10.0-rc6-syzkaller-00051-g1dfe225e9af5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 refcount_read include/linux/refcount.h:136 [inline]
 skb_unref include/linux/skbuff.h:1222 [inline]
 __kfree_skb_reason net/core/skbuff.c:1195 [inline]
 kfree_skb_reason+0x36/0x210 net/core/skbuff.c:1222
 kfree_skb include/linux/skbuff.h:1257 [inline]
 __hci_req_sync+0x61d/0x980 net/bluetooth/hci_request.c:184
 hci_req_sync+0x97/0xd0 net/bluetooth/hci_request.c:206
 hci_dev_cmd+0x634/0x960 net/bluetooth/hci_core.c:787
 hci_sock_ioctl+0x4f3/0x880 net/bluetooth/hci_sock.c:1150
 sock_do_ioctl+0x116/0x280 net/socket.c:1222
 sock_ioctl+0x22e/0x6c0 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c27975adb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffc01cb4450 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3c27975adb
RDX: 00007ffc01cb44c8 RSI: 00000000400448dd RDI: 0000000000000003
RBP: 000055558f1d34a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000002 R14: 0000000000000009 R15: 0000000000000009
 </TASK>

Allocated by task 65:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4009
 skb_clone+0x190/0x3f0 net/core/skbuff.c:2052
 hci_send_cmd_sync net/bluetooth/hci_core.c:4123 [inline]
 hci_cmd_work+0x66a/0x710 net/bluetooth/hci_core.c:4143
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5300:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2196 [inline]
 slab_free mm/slub.c:4438 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4513
 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131
 __kfree_skb net/core/skbuff.c:1188 [inline]
 kfree_skb_reason+0x138/0x210 net/core/skbuff.c:1223
 kfree_skb include/linux/skbuff.h:1257 [inline]
 hci_req_sync_complete+0x16c/0x270 net/bluetooth/hci_request.c:109
 hci_event_packet+0x963/0x1170 net/bluetooth/hci_event.c:7479
 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff888020cdedc0
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 228 bytes inside of
 freed 240-byte region [ffff888020cdedc0, ffff888020cdeeb0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20cde
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888018ed8780 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080190019 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888018ed8780 dead000000000122 0000000000000000
head: 0000000000000000 0000000080190019 00000001ffffefff 0000000000000000
head: 00fff00000000001 ffffea0000833781 ffffffffffffffff 0000000000000000
head: ffff888000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5243, tgid 5243 (kworker/u33:2), ts 57040075623, free_ts 56147367857
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x1353/0x2e50 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4683
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x56/0x110 mm/slub.c:2265
 allocate_slab mm/slub.c:2428 [inline]
 new_slab+0x84/0x260 mm/slub.c:2481
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3990 [inline]
 kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4009
 skb_clone+0x190/0x3f0 net/core/skbuff.c:2052
 hci_event_packet+0x14f/0x1170 net/bluetooth/hci_event.c:7435
 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page last free pid 5229 tgid 5229 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2588
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 __do_kmalloc_node mm/slub.c:4122 [inline]
 __kmalloc_noprof+0x19d/0x410 mm/slub.c:4136
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 new_dir fs/proc/proc_sysctl.c:953 [inline]
 get_subdir fs/proc/proc_sysctl.c:997 [inline]
 sysctl_mkdir_p fs/proc/proc_sysctl.c:1292 [inline]
 __register_sysctl_table+0xdde/0x1790 fs/proc/proc_sysctl.c:1373
 __addrconf_sysctl_register+0x1a3/0x360 net/ipv6/addrconf.c:7215
 addrconf_sysctl_register net/ipv6/addrconf.c:7263 [inline]
 addrconf_sysctl_register+0x15f/0x1f0 net/ipv6/addrconf.c:7252
 ipv6_add_dev+0x9d7/0x1400 net/ipv6/addrconf.c:456
 addrconf_notify+0x546/0x19e0 net/ipv6/addrconf.c:3652
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 register_netdevice+0x15fb/0x1cb0 net/core/dev.c:10408
 register_vlan_dev+0x372/0x940 net/8021q/vlan.c:179
 vlan_newlink+0x413/0x6b0 net/8021q/vlan_netlink.c:193
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink+0x1197/0x1960 net/core/rtnetlink.c:3730

Memory state around the buggy address:
 ffff888020cded80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888020cdee00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888020cdee80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888020cdef00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888020cdef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================