Bluetooth: hci1: sending frame failed (-49) ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:902 [inline] BUG: KASAN: use-after-free in enqueue_timer+0xad/0x4c0 kernel/time/timer.c:588 Write of size 8 at addr ffff8881162c48e0 by task kworker/u5:3/23785 CPU: 0 PID: 23785 Comm: kworker/u5:3 Not tainted 5.15.147-syzkaller-00327-g1c3a1f32bcbd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: hci0 hci_cmd_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:314 hlist_add_head include/linux/list.h:902 [inline] enqueue_timer+0xad/0x4c0 kernel/time/timer.c:588 internal_add_timer kernel/time/timer.c:617 [inline] __mod_timer+0x8d3/0xcf0 kernel/time/timer.c:1068 add_timer+0x68/0x80 kernel/time/timer.c:1150 __queue_delayed_work+0x16d/0x1f0 kernel/workqueue.c:1697 queue_delayed_work_on+0x10f/0x180 kernel/workqueue.c:1722 queue_delayed_work include/linux/workqueue.h:525 [inline] schedule_delayed_work include/linux/workqueue.h:629 [inline] hci_cmd_work+0x22d/0x270 net/bluetooth/hci_core.c:5198 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 23782: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13a/0x270 mm/slub.c:4427 kmalloc include/linux/slab.h:608 [inline] kzalloc include/linux/slab.h:733 [inline] hci_alloc_dev_priv+0x27/0x1bd0 net/bluetooth/hci_core.c:3774 hci_alloc_dev include/net/bluetooth/hci_core.h:1263 [inline] hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:633 [inline] hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:709 [inline] hci_uart_tty_ioctl+0x3c8/0xa10 drivers/bluetooth/hci_ldisc.c:763 tty_ioctl+0x93b/0xc90 drivers/tty/tty_io.c:2816 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x320 kernel/workqueue.c:1373 __queue_work+0x92a/0xcd0 kernel/workqueue.c:1539 queue_work_on+0x105/0x170 kernel/workqueue.c:1566 queue_work include/linux/workqueue.h:510 [inline] hci_cmd_timeout+0x199/0x200 net/bluetooth/hci_core.c:2787 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x320 kernel/workqueue.c:1373 __queue_work+0x92a/0xcd0 kernel/workqueue.c:1539 delayed_work_timer_fn+0x61/0x80 kernel/workqueue.c:1664 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1427 expire_timers kernel/time/timer.c:1467 [inline] __run_timers+0x756/0xa10 kernel/time/timer.c:1743 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1756 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 The buggy address belongs to the object at ffff8881162c4000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2272 bytes inside of 8192-byte region [ffff8881162c4000, ffff8881162c6000) The buggy address belongs to the page: page:ffffea000458b000 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881162c4000 pfn:0x1162c0 head:ffffea000458b000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004404800 0000000300000003 ffff888100043500 raw: ffff8881162c4000 0000000080020001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 22794, ts 1465204670634, free_ts 1464798052684 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc_trace+0x142/0x210 mm/slub.c:3265 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] fat_fill_super+0x116/0x4f40 fs/fat/inode.c:1624 vfat_fill_super+0x31/0x40 fs/fat/namei_vfat.c:1051 mount_bdev+0x282/0x3b0 fs/super.c:1387 vfat_mount+0x34/0x40 fs/fat/namei_vfat.c:1058 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 do_new_mount+0x28b/0xad0 fs/namespace.c:2994 path_mount+0x671/0x1070 fs/namespace.c:3324 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page+0xe8/0x750 mm/page_alloc.c:3615 free_the_page mm/page_alloc.c:804 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5852 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3388 do_slab_free mm/slub.c:3507 [inline] ___cache_free+0x109/0x120 mm/slub.c:3526 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 getname_flags+0xba/0x520 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 Memory state around the buggy address: ffff8881162c4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881162c4800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881162c4880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881162c4900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881162c4980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================