last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.222' (ED25519) to the list of known hosts. 1970/01/01 00:00:37 fuzzer started 1970/01/01 00:00:37 dialing manager at 10.128.0.169:30028 [ 37.364005][ T6255] cgroup: Unknown subsys name 'net' [ 37.451526][ T6263] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS [ 37.644288][ T6255] cgroup: Unknown subsys name 'rlimit' 1970/01/01 00:00:37 starting 5 executor processes [ 38.541228][ T52] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 38.544248][ T52] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 38.546985][ T52] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 38.560333][ T6280] Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 [ 38.563441][ T6280] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 38.565957][ T6282] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 38.568087][ T6282] Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 [ 38.572325][ T6280] Bluetooth: hci2: unexpected cc 0x0c03 length: 249 > 1 [ 38.575332][ T6280] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 38.577575][ T6280] Bluetooth: hci2: unexpected cc 0x1003 length: 249 > 9 [ 38.580226][ T6280] Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 [ 38.582200][ T6280] Bluetooth: hci2: unexpected cc 0x1001 length: 249 > 9 [ 38.585055][ T6284] Bluetooth: hci2: unexpected cc 0x0c23 length: 249 > 4 [ 38.590207][ T5830] Bluetooth: hci2: unexpected cc 0x0c25 length: 249 > 3 [ 38.592190][ T5830] Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 [ 38.594201][ T6282] Bluetooth: hci2: unexpected cc 0x0c38 length: 249 > 2 [ 38.606253][ T6277] Bluetooth: hci1: unexpected cc 0x0c25 length: 249 > 3 [ 38.613838][ T6282] Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 [ 38.624567][ T6277] Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 [ 38.627778][ T6277] Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 [ 38.631239][ T6277] Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 [ 38.652879][ T6277] Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 [ 38.655440][ T6277] Bluetooth: hci3: unexpected cc 0x0c25 length: 249 > 3 [ 38.658169][ T6277] Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 [ 38.665125][ T6282] Bluetooth: hci4: unexpected cc 0x0c03 length: 249 > 1 [ 38.667839][ T6282] Bluetooth: hci4: unexpected cc 0x1003 length: 249 > 9 [ 38.670893][ T6282] Bluetooth: hci4: unexpected cc 0x1001 length: 249 > 9 [ 38.687463][ T6282] Bluetooth: hci4: unexpected cc 0x0c23 length: 249 > 4 [ 38.690524][ T6277] ================================================================== [ 38.690629][ T6282] Bluetooth: hci4: unexpected cc 0x0c25 length: 249 > 3 [ 38.692629][ T6277] BUG: KASAN: double-free in kfree_skbmem+0x15c/0x1ec [ 38.696107][ T6277] Free of addr ffff0000edc02b40 by task kworker/u9:2/6277 [ 38.697999][ T6277] [ 38.698584][ T6277] CPU: 1 PID: 6277 Comm: kworker/u9:2 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 [ 38.701492][ T6277] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 38.704032][ T6277] Workqueue: hci3 hci_rx_work [ 38.705345][ T6277] Call trace: [ 38.706167][ T6277] dump_backtrace+0x1b8/0x1e4 [ 38.707445][ T6277] show_stack+0x2c/0x3c [ 38.708544][ T6277] dump_stack_lvl+0xe4/0x150 1970/01/01 00:00:38 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 38.709750][ T6277] print_report+0x198/0x538 [ 38.710959][ T6277] kasan_report_invalid_free+0xc4/0x118 [ 38.712432][ T6277] poison_slab_object+0x140/0x180 [ 38.713756][ T6277] __kasan_slab_free+0x3c/0x70 [ 38.714987][ T6277] kmem_cache_free+0x178/0x4e4 [ 38.716248][ T6277] kfree_skbmem+0x15c/0x1ec [ 38.717414][ T6277] kfree_skb_reason+0x1c8/0x4a4 [ 38.718677][ T6277] hci_req_sync_complete+0xb0/0x248 [ 38.720044][ T6277] hci_event_packet+0xab8/0x105c [ 38.721399][ T6277] hci_rx_work+0x318/0xa78 [ 38.722567][ T6277] process_one_work+0x7b0/0x15e8 [ 38.723844][ T6277] worker_thread+0x938/0xef4 [ 38.725041][ T6277] kthread+0x288/0x310 [ 38.726074][ T6277] ret_from_fork+0x10/0x20 [ 38.727204][ T6277] [ 38.727825][ T6277] Allocated by task 6282: [ 38.728926][ T6277] kasan_save_track+0x40/0x78 [ 38.730120][ T6277] kasan_save_alloc_info+0x40/0x50 [ 38.731462][ T6277] __kasan_slab_alloc+0x74/0x8c [ 38.732731][ T6277] kmem_cache_alloc_noprof+0x1c0/0x350 [ 38.734142][ T6277] skb_clone+0x1c8/0x330 [ 38.735240][ T6277] hci_cmd_work+0x174/0x568 [ 38.736512][ T6277] process_one_work+0x7b0/0x15e8 [ 38.737764][ T6277] worker_thread+0x938/0xef4 [ 38.739025][ T6277] kthread+0x288/0x310 [ 38.740077][ T6277] ret_from_fork+0x10/0x20 [ 38.741229][ T6277] [ 38.741844][ T6277] The buggy address belongs to the object at ffff0000edc02b40 [ 38.741844][ T6277] which belongs to the cache skbuff_head_cache of size 240 [ 38.745700][ T6277] The buggy address is located 0 bytes inside of [ 38.745700][ T6277] 240-byte region [ffff0000edc02b40, ffff0000edc02c30) [ 38.749117][ T6277] [ 38.749744][ T6277] The buggy address belongs to the physical page: [ 38.751418][ T6277] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12dc02 [ 38.753788][ T6277] flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) [ 38.755593][ T6277] page_type: 0xffffefff(slab) [ 38.756765][ T6277] raw: 05ffc00000000000 ffff0000c1bcc780 dead000000000122 0000000000000000 [ 38.758989][ T6277] raw: 0000000000000000 00000000000c000c 00000001ffffefff 0000000000000000 [ 38.761281][ T6277] page dumped because: kasan: bad access detected [ 38.763017][ T6277] [ 38.763580][ T6277] Memory state around the buggy address: [ 38.765119][ T6277] ffff0000edc02a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.767244][ T6277] ffff0000edc02a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.769477][ T6277] >ffff0000edc02b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.771777][ T6277] ^ [ 38.773386][ T6277] ffff0000edc02b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.775531][ T6277] ffff0000edc02c00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.777702][ T6277] ================================================================== [ 38.789028][ T6277] Disabling lock debugging due to kernel taint [ 38.795912][ T6282] Bluetooth: hci4: unexpected cc 0x0c38 length: 249 > 2