last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.140' (ED25519) to the list of known hosts. 1970/01/01 00:00:31 fuzzer started 1970/01/01 00:00:31 dialing manager at 10.128.0.169:30028 [ 32.073277][ T6255] cgroup: Unknown subsys name 'net' [ 32.145874][ T6265] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS [ 32.327829][ T6255] cgroup: Unknown subsys name 'rlimit' 1970/01/01 00:00:32 starting 5 executor processes [ 33.269154][ T6284] Bluetooth: hci2: unexpected cc 0x0c03 length: 249 > 1 [ 33.272053][ T6284] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 33.274620][ T6284] Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 [ 33.278762][ T6286] Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 [ 33.281054][ T6286] Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 [ 33.283691][ T6286] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 33.287772][ T6286] Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 [ 33.289616][ T6286] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 33.292154][ T6286] Bluetooth: hci2: unexpected cc 0x1003 length: 249 > 9 [ 33.292279][ T6291] Bluetooth: hci4: unexpected cc 0x0c03 length: 249 > 1 [ 33.296266][ T6290] Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 [ 33.297773][ T6291] Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 [ 33.298922][ T6283] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 33.300815][ T6291] Bluetooth: hci1: unexpected cc 0x0c25 length: 249 > 3 [ 33.302483][ T6290] Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 [ 33.304237][ T6291] Bluetooth: hci2: unexpected cc 0x1001 length: 249 > 9 [ 33.306003][ T6283] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 33.308024][ T6291] Bluetooth: hci4: unexpected cc 0x1003 length: 249 > 9 [ 33.310472][ T6290] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 33.312117][ T6291] Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 [ 33.314663][ T6290] Bluetooth: hci4: unexpected cc 0x1001 length: 249 > 9 [ 33.320656][ T6291] Bluetooth: hci2: unexpected cc 0x0c23 length: 249 > 4 [ 33.321178][ T6290] ================================================================== [ 33.324621][ T6290] BUG: KASAN: double-free in kfree_skbmem+0x15c/0x1ec [ 33.326492][ T6290] Free of addr ffff0000eb9e2500 by task kworker/u9:7/6290 [ 33.328460][ T6290] [ 33.329101][ T6290] CPU: 0 PID: 6290 Comm: kworker/u9:7 Tainted: G W 6.10.0-rc3-syzkaller-gac2193b4b460 #0 [ 33.332183][ T6290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 33.334901][ T6290] Workqueue: hci0 hci_rx_work [ 33.336190][ T6290] Call trace: [ 33.337040][ T6290] dump_backtrace+0x1b8/0x1e4 [ 33.338270][ T6290] show_stack+0x2c/0x3c [ 33.339360][ T6290] dump_stack_lvl+0xe4/0x150 [ 33.340619][ T6290] print_report+0x198/0x538 [ 33.341773][ T6290] kasan_report_invalid_free+0xc4/0x118 [ 33.343201][ T6290] poison_slab_object+0x140/0x180 [ 33.344543][ T6290] __kasan_slab_free+0x3c/0x70 [ 33.345801][ T6290] kmem_cache_free+0x170/0x4d0 [ 33.347078][ T6290] kfree_skbmem+0x15c/0x1ec [ 33.348231][ T6290] kfree_skb_reason+0x1c0/0x490 [ 33.349533][ T6290] hci_req_sync_complete+0xb0/0x248 [ 33.350933][ T6290] hci_event_packet+0xab8/0x105c [ 33.352211][ T6290] hci_rx_work+0x318/0xa78 [ 33.353369][ T6291] Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 [ 33.353382][ T6290] process_one_work+0x79c/0x15b8 [ 33.353405][ T6290] worker_thread+0x938/0xef4 [ 33.356311][ T6281] Bluetooth: hci2: unexpected cc 0x0c25 length: 249 > 3 [ 33.356548][ T6290] kthread+0x288/0x310 [ 33.357972][ T6281] Bluetooth: hci4: unexpected cc 0x0c23 length: 249 > 4 [ 33.359567][ T6290] ret_from_fork+0x10/0x20 [ 33.360848][ T6281] Bluetooth: hci2: unexpected cc 0x0c38 length: 249 > 2 [ 33.362373][ T6290] [ 33.362381][ T6290] Allocated by task 6291: [ 33.363870][ T6281] Bluetooth: hci3: unexpected cc 0x0c25 length: 249 > 3 [ 33.365379][ T6290] kasan_save_track+0x40/0x78 [ 33.366895][ T6291] Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 [ 33.367224][ T6290] kasan_save_alloc_info+0x40/0x50 [ 33.369113][ T6291] Bluetooth: hci4: unexpected cc 0x0c25 length: 249 > 3 [ 33.370196][ T6290] __kasan_slab_alloc+0x74/0x8c [ 33.372990][ T6291] Bluetooth: hci4: unexpected cc 0x0c38 length: 249 > 2 [ 33.373364][ T6290] kmem_cache_alloc_noprof+0x1c0/0x350 [ 33.379781][ T6290] skb_clone+0x1c8/0x330 [ 33.380872][ T6290] hci_cmd_work+0x174/0x568 [ 33.382120][ T6290] process_one_work+0x79c/0x15b8 [ 33.383413][ T6290] worker_thread+0x938/0xef4 [ 33.384717][ T6290] kthread+0x288/0x310 [ 33.385813][ T6290] ret_from_fork+0x10/0x20 [ 33.387029][ T6290] [ 33.387655][ T6290] Freed by task 6277: [ 33.388728][ T6290] kasan_save_track+0x40/0x78 [ 33.389979][ T6290] kasan_save_free_info+0x54/0x6c [ 33.391306][ T6290] poison_slab_object+0x128/0x180 [ 33.392704][ T6290] __kasan_slab_free+0x3c/0x70 [ 33.393980][ T6290] kmem_cache_free+0x170/0x4d0 [ 33.395275][ T6290] kfree_skbmem+0x15c/0x1ec [ 33.396498][ T6290] kfree_skb_reason+0x1c0/0x490 [ 33.397818][ T6290] __hci_req_sync+0x4e8/0x798 [ 33.399064][ T6290] hci_req_sync+0xa0/0xcc [ 33.400279][ T6290] hci_dev_cmd+0x304/0x8c0 [ 33.401510][ T6290] hci_sock_ioctl+0x4b8/0x7e4 [ 33.402733][ T6290] sock_do_ioctl+0x134/0x2d0 [ 33.403920][ T6290] sock_ioctl+0x4ec/0x838 [ 33.405098][ T6290] __arm64_sys_ioctl+0x14c/0x1c8 [ 33.406422][ T6290] invoke_syscall+0x98/0x2b8 [ 33.407687][ T6290] el0_svc_common+0x130/0x23c [ 33.408932][ T6290] do_el0_svc+0x48/0x58 [ 33.410024][ T6290] el0_svc+0x54/0x168 [ 33.411127][ T6290] el0t_64_sync_handler+0x84/0xfc [ 33.412473][ T6290] el0t_64_sync+0x190/0x194 [ 33.413696][ T6290] [ 33.414280][ T6290] The buggy address belongs to the object at ffff0000eb9e2500 [ 33.414280][ T6290] which belongs to the cache skbuff_head_cache of size 240 [ 33.418147][ T6290] The buggy address is located 0 bytes inside of [ 33.418147][ T6290] 240-byte region [ffff0000eb9e2500, ffff0000eb9e25f0) [ 33.421633][ T6290] [ 33.422202][ T6290] The buggy address belongs to the physical page: [ 33.423936][ T6290] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b9e2 [ 33.426272][ T6290] flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) [ 33.428168][ T6290] page_type: 0xffffefff(slab) [ 33.429435][ T6290] raw: 05ffc00000000000 ffff0000c188edc0 dead000000000122 0000000000000000 [ 33.431809][ T6290] raw: 0000000000000000 00000000000c000c 00000001ffffefff 0000000000000000 [ 33.434118][ T6290] page dumped because: kasan: bad access detected [ 33.435930][ T6290] [ 33.436567][ T6290] Memory state around the buggy address: [ 33.438095][ T6290] ffff0000eb9e2400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.440263][ T6290] ffff0000eb9e2480: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 33.442455][ T6290] >ffff0000eb9e2500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.444661][ T6290] ^ [ 33.445812][ T6290] ffff0000eb9e2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.447956][ T6290] ffff0000eb9e2600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.450175][ T6290] ================================================================== [ 33.452627][ T6290] Disabling lock debugging due to kernel taint 1970/01/01 00:00:33 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF