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BUG: KASAN: slab-use-after-free in hci_cmd_timeout+0x216/0x260 net/bluetooth/hci_core.c:1522
Read of size 2 at addr ffff88801d37a7b8 by task kworker/u9:0/53

CPU: 0 PID: 53 Comm: kworker/u9:0 Not tainted 6.10.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: hci0 hci_cmd_timeout
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
 hci_cmd_timeout+0x216/0x260 net/bluetooth/hci_core.c:1522
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 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
 </TASK>

Allocated by task 53:
 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:4000 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4007
 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+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 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 6047:
 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:2195 [inline]
 slab_free mm/slub.c:4436 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4511
 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+0x61d/0x980 net/bluetooth/hci_request.c:184
 hci_req_sync+0x97/0xd0 net/bluetooth/hci_request.c:206
 hci_inquiry+0x3ea/0x950 net/bluetooth/hci_core.c:427
 hci_sock_ioctl+0x2bb/0x880 net/bluetooth/hci_sock.c:1153
 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

The buggy address belongs to the object at ffff88801d37a780
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 56 bytes inside of
 freed 240-byte region [ffff88801d37a780, ffff88801d37a870)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d37a
memcg:ffff8880611fac81
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000000 ffff888019aa2780 0000000000000000 dead000000000001
raw: 0000000000000000 00000000000c000c 00000001ffffefff ffff8880611fac81
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 4931, tgid 4931 (sshd), ts 59617620813, free_ts 56579912779
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660
 __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:2264
 allocate_slab mm/slub.c:2427 [inline]
 new_slab+0x84/0x260 mm/slub.c:2480
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756
 __slab_alloc_node mm/slub.c:3809 [inline]
 slab_alloc_node mm/slub.c:3988 [inline]
 kmem_cache_alloc_node_noprof+0xed/0x310 mm/slub.c:4043
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:656
 alloc_skb include/linux/skbuff.h:1308 [inline]
 __tcp_send_ack.part.0+0x64/0x720 net/ipv4/tcp_output.c:4247
 __tcp_send_ack net/ipv4/tcp_output.c:4279 [inline]
 tcp_send_ack+0x82/0xa0 net/ipv4/tcp_output.c:4279
 __tcp_cleanup_rbuf+0x278/0x4b0 net/ipv4/tcp.c:1496
 tcp_recvmsg_locked+0x123e/0x2700 net/ipv4/tcp.c:2557
 tcp_recvmsg+0x12e/0x680 net/ipv4/tcp.c:2587
 inet_recvmsg+0x12b/0x6a0 net/ipv4/af_inet.c:885
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg+0x1b2/0x250 net/socket.c:1068
page last free pid 4912 tgid 4912 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2565
 __put_partials+0x14c/0x170 mm/slub.c:2994
 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:4000 [inline]
 kmalloc_trace_noprof+0x11e/0x300 mm/slub.c:4147
 kmalloc_noprof include/linux/slab.h:660 [inline]
 tomoyo_print_header security/tomoyo/audit.c:156 [inline]
 tomoyo_init_log+0x195/0x2180 security/tomoyo/audit.c:255
 tomoyo_supervisor+0x30c/0xea0 security/tomoyo/common.c:2089
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x270/0x3b0 security/tomoyo/file.c:573
 tomoyo_path_perm+0x35e/0x450 security/tomoyo/file.c:838
 security_inode_getattr+0xf4/0x160 security/security.c:2269
 vfs_getattr fs/stat.c:173 [inline]
 vfs_fstat+0x53/0xd0 fs/stat.c:198
 vfs_fstatat+0x134/0x150 fs/stat.c:300
 __do_sys_newfstatat+0xa6/0x130 fs/stat.c:468
 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

Memory state around the buggy address:
 ffff88801d37a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801d37a700: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
>ffff88801d37a780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88801d37a800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
 ffff88801d37a880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
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