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BUG: KASAN: slab-use-after-free in skb_dst_drop include/net/dst.h:274 [inline]
BUG: KASAN: slab-use-after-free in skb_release_head_state+0x40/0x28c net/core/skbuff.c:1185
Read of size 8 at addr ffff0000ed18d198 by task syz-executor.1/6270

CPU: 0 PID: 6270 Comm: syz-executor.1 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 skb_dst_drop include/net/dst.h:274 [inline]
 skb_release_head_state+0x40/0x28c net/core/skbuff.c:1185
 skb_release_all net/core/skbuff.c:1200 [inline]
 __kfree_skb net/core/skbuff.c:1216 [inline]
 kfree_skb_reason+0x190/0x4a8 net/core/skbuff.c:1252
 kfree_skb include/linux/skbuff.h:1262 [inline]
 __hci_req_sync+0x4fc/0x7ac net/bluetooth/hci_request.c:184
 hci_req_sync+0xa0/0xcc net/bluetooth/hci_request.c:206
 hci_dev_cmd+0x330/0x90c net/bluetooth/hci_core.c:790
 hci_sock_ioctl+0x4b8/0x82c net/bluetooth/hci_sock.c:1153
 sock_do_ioctl+0x134/0x2d0 net/socket.c:1222
 sock_ioctl+0x4ec/0x838 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl fs/ioctl.c:890 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:890
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Allocated by task 6276:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3798 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmem_cache_alloc+0x1dc/0x3c0 mm/slub.c:3852
 skb_clone+0x1c8/0x330 net/core/skbuff.c:2063
 hci_send_cmd_sync net/bluetooth/hci_core.c:4220 [inline]
 hci_cmd_work+0x174/0x568 net/bluetooth/hci_core.c:4240
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Freed by task 6278:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:579
 poison_slab_object+0x124/0x18c mm/kasan/common.c:240
 __kasan_slab_free+0x3c/0x70 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2106 [inline]
 slab_free mm/slub.c:4280 [inline]
 kmem_cache_free+0x168/0x3f0 mm/slub.c:4344
 kfree_skbmem+0x15c/0x1ec
 __kfree_skb net/core/skbuff.c:1217 [inline]
 kfree_skb_reason+0x1cc/0x4a8 net/core/skbuff.c:1252
 kfree_skb include/linux/skbuff.h:1262 [inline]
 hci_req_sync_complete+0xcc/0x258 net/bluetooth/hci_request.c:109
 hci_event_packet+0xbd0/0x1098 net/bluetooth/hci_event.c:7607
 hci_rx_work+0x318/0xa78 net/bluetooth/hci_core.c:4171
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

The buggy address belongs to the object at ffff0000ed18d140
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 88 bytes inside of
 freed 240-byte region [ffff0000ed18d140, ffff0000ed18d230)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d18d
flags: 0x5ffc00000000800(slab|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000800 ffff0000c1bbd780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ed18d080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
 ffff0000ed18d100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff0000ed18d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff0000ed18d200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
 ffff0000ed18d280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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