Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa ================================================================== BUG: KASAN: slab-use-after-free in hci_disconnect+0x207/0x220 net/bluetooth/hci_conn.c:190 Read of size 8 at addr ffff88802d4b4038 by task kworker/u9:1/4478 CPU: 0 PID: 4478 Comm: kworker/u9:1 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: hci2 hci_tx_work Call Trace: __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_disconnect+0x207/0x220 net/bluetooth/hci_conn.c:190 hci_link_tx_to net/bluetooth/hci_core.c:3470 [inline] __check_timeout net/bluetooth/hci_core.c:3611 [inline] __check_timeout+0x3fe/0x730 net/bluetooth/hci_core.c:3591 hci_sched_le net/bluetooth/hci_core.c:3728 [inline] hci_tx_work+0x6e2/0x1540 net/bluetooth/hci_core.c:3806 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 Allocated by task 5121: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] hci_conn_add+0x135/0x1a50 net/bluetooth/hci_conn.c:935 hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1044 le_conn_complete_evt+0x790/0x1d80 net/bluetooth/hci_event.c:5635 hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5787 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7106 hci_event_func net/bluetooth/hci_event.c:7414 [inline] hci_event_packet+0x664/0x1170 net/bluetooth/hci_event.c:7469 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074 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 5121: 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] kfree+0x12a/0x3b0 mm/slub.c:4557 device_release+0xa1/0x240 drivers/base/core.c:2580 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1fa/0x5b0 lib/kobject.c:737 put_device drivers/base/core.c:3828 [inline] device_unregister+0x2f/0xc0 drivers/base/core.c:3951 hci_conn_del_sysfs+0xb4/0x180 net/bluetooth/hci_sysfs.c:86 hci_conn_cleanup net/bluetooth/hci_conn.c:176 [inline] hci_conn_del+0x54e/0xdb0 net/bluetooth/hci_conn.c:1154 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5450 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2909 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:310 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 The buggy address belongs to the object at ffff88802d4b4000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 56 bytes inside of freed 8192-byte region [ffff88802d4b4000, ffff88802d4b6000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802d4b0000 pfn:0x2d4b0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000240 ffff888015442280 ffffea0000b0ae10 ffffea0001b6b010 raw: ffff88802d4b0000 0000000000020001 00000001ffffefff 0000000000000000 head: 00fff00000000240 ffff888015442280 ffffea0000b0ae10 ffffea0001b6b010 head: ffff88802d4b0000 0000000000020001 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0000b52c01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4757, tgid 4757 (dhcpcd-run-hook), ts 55443864057, free_ts 55443139255 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:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [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] kmalloc_trace_noprof+0x2c5/0x310 mm/slub.c:4147 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0xcb6/0x2180 security/tomoyo/audit.c:264 tomoyo_supervisor+0x30c/0xea0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x193/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0xef9/0x2020 security/tomoyo/domain.c:878 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:102 [inline] tomoyo_bprm_check_security+0x12e/0x1d0 security/tomoyo/tomoyo.c:92 security_bprm_check+0x65/0xb0 security/security.c:1191 search_binary_handler fs/exec.c:1785 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve fs/exec.c:1891 [inline] bprm_execve+0x642/0x19b0 fs/exec.c:1867 do_execveat_common.isra.0+0x5cb/0x750 fs/exec.c:1998 page last free pid 4757 tgid 4757 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/0x310 mm/slub.c:4147 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0xcb6/0x2180 security/tomoyo/audit.c:264 tomoyo_supervisor+0x30c/0xea0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x193/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0xef9/0x2020 security/tomoyo/domain.c:878 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:102 [inline] tomoyo_bprm_check_security+0x12e/0x1d0 security/tomoyo/tomoyo.c:92 security_bprm_check+0x65/0xb0 security/security.c:1191 search_binary_handler fs/exec.c:1785 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve fs/exec.c:1891 [inline] bprm_execve+0x642/0x19b0 fs/exec.c:1867 do_execveat_common.isra.0+0x5cb/0x750 fs/exec.c:1998 do_execve fs/exec.c:2072 [inline] __do_sys_execve fs/exec.c:2148 [inline] __se_sys_execve fs/exec.c:2143 [inline] __x64_sys_execve+0x8c/0xb0 fs/exec.c:2143 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff88802d4b3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802d4b3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802d4b4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802d4b4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802d4b4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================