================================================================== BUG: KASAN: slab-use-after-free in mgmt_remove_adv_monitor_sync+0xe2/0xf0 net/bluetooth/mgmt.c:5543 Read of size 8 at addr ffff888059a1c598 by task kworker/u33:1/5291 CPU: 0 UID: 0 PID: 5291 Comm: kworker/u33:1 Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: hci0 hci_cmd_sync_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 mgmt_remove_adv_monitor_sync+0xe2/0xf0 net/bluetooth/mgmt.c:5543 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:332 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 7499: 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:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] mgmt_pending_new+0x5b/0x290 net/bluetooth/mgmt_util.c:269 mgmt_pending_add+0x36/0x160 net/bluetooth/mgmt_util.c:296 remove_adv_monitor+0x124/0x1b0 net/bluetooth/mgmt.c:5568 hci_mgmt_cmd net/bluetooth/hci_sock.c:1712 [inline] hci_sock_sendmsg+0x1528/0x25e0 net/bluetooth/hci_sock.c:1832 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] sock_write_iter+0x4fe/0x5b0 net/socket.c:1147 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x207/0x250 fs/read_write.c:731 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 Freed by task 62: 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:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x14f/0x4b0 mm/slub.c:4761 cmd_status_rsp net/bluetooth/mgmt.c:1459 [inline] cmd_complete_rsp+0x16d/0x1e0 net/bluetooth/mgmt.c:1478 mgmt_pending_foreach+0xdf/0x140 net/bluetooth/mgmt_util.c:259 __mgmt_power_off+0x12a/0x2c0 net/bluetooth/mgmt.c:9550 hci_dev_close_sync+0xcbb/0x11a0 net/bluetooth/hci_sync.c:5208 hci_dev_do_close+0x2e/0x90 net/bluetooth/hci_core.c:482 hci_rfkill_set_block+0x225/0x360 net/bluetooth/hci_core.c:910 rfkill_set_block+0x203/0x560 net/rfkill/core.c:346 rfkill_epo+0x8e/0x1d0 net/rfkill/core.c:466 __rfkill_handle_global_op net/rfkill/input.c:60 [inline] rfkill_op_handler+0x262/0x280 net/rfkill/input.c:108 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 ffff888059a1c580 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 24 bytes inside of freed 96-byte region [ffff888059a1c580, ffff888059a1c5e0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888059a1c400 pfn:0x59a1c flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801b042280 ffffea0000ab6c90 ffffea00017173d0 raw: ffff888059a1c400 0000000000200017 00000001f5000000 0000000000000000 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 68, tgid 68 (kworker/u32:3), ts 74766692795, free_ts 73415696400 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xd7d/0x17a0 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x2ec/0x510 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] cfg80211_inform_single_bss_data+0x543/0x1df0 net/wireless/scan.c:2306 cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3189 cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3284 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1101 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1580 [inline] ieee80211_ibss_rx_queued_mgmt+0x189c/0x2f50 net/mac80211/ibss.c:1607 ieee80211_iface_process_skb net/mac80211/iface.c:1613 [inline] ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1667 cfg80211_wiphy_work+0x3de/0x560 net/wireless/core.c:440 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 page last free pid 7241 tgid 7241 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_folios+0xa7b/0x14f0 mm/page_alloc.c:2704 folios_put_refs+0x587/0x7b0 mm/swap.c:962 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x586/0x1170 mm/shmem.c:1040 shmem_truncate_range mm/shmem.c:1152 [inline] shmem_evict_inode+0x3a3/0xba0 mm/shmem.c:1280 evict+0x409/0x960 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput fs/inode.c:1972 [inline] iput+0x52a/0x890 fs/inode.c:1958 dentry_unlink_inode+0x29c/0x480 fs/dcache.c:422 __dentry_kill+0x1d0/0x600 fs/dcache.c:625 dput.part.0+0x4b1/0x9b0 fs/dcache.c:867 dput+0x1f/0x30 fs/dcache.c:857 __fput+0x515/0xb60 fs/file_table.c:458 task_work_run+0x14e/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xad8/0x2d70 kernel/exit.c:938 __do_sys_exit kernel/exit.c:1054 [inline] __se_sys_exit kernel/exit.c:1052 [inline] __x64_sys_exit+0x42/0x50 kernel/exit.c:1052 x64_sys_call+0xe97/0x1720 arch/x86/include/generated/asm/syscalls_64.h:61 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff888059a1c480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888059a1c500: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888059a1c580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888059a1c600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888059a1c680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================