program: r0 = syz_init_net_socket$nfc_llcp(0x27, 0x2, 0x1) ioctl$sock_kcm_SIOCKCMCLONE(0xffffffffffffffff, 0x89e2, &(0x7f0000000080)={r0}) bind$alg(r1, &(0x7f00000000c0)={0x26, 'skcipher\x00', 0x0, 0x0, 'ecb-cipher_null\x00'}, 0x58) syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22) syz_emit_vhci(&(0x7f0000000040)=ANY=[@ANYBLOB="0200300c000800"], 0x11) ioctl$FS_IOC_SET_ENCRYPTION_POLICY(0xffffffffffffffff, 0x40086602, 0x0) syz_emit_vhci(&(0x7f0000000080)=ANY=[@ANYBLOB="0405"], 0x7) syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_role_change={{0x12, 0x8}}}, 0xb) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x0) r2 = openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0) r3 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10) r4 = syz_open_dev$vim2m(&(0x7f0000000100), 0x0, 0x2) ioctl$vim2m_VIDIOC_REQBUFS(r4, 0xc0145608, &(0x7f00000000c0)={0x1, 0x2, 0x1}) ioctl$vim2m_VIDIOC_EXPBUF(r4, 0xc0405610, &(0x7f0000000040)={0x2, 0x0, 0x0, 0x0, 0xffffffffffffffff}) ioctl$DMA_BUF_IOCTL_SYNC(r5, 0x40086200, &(0x7f0000000480)=0x2) r6 = syz_genetlink_get_family_id$nfc(&(0x7f0000000100), r3) ioctl$IOCTL_GET_NCIDEV_IDX(r2, 0x0, &(0x7f00000000c0)=0x0) sendmsg$NFC_CMD_DEV_UP(r3, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000d80)=ANY=[@ANYBLOB="1c000000", @ANYRES16=r6, @ANYBLOB="010426bd7000f8dbdf250200000008000100", @ANYRES32=r7], 0x1c}}, 0x4008054) r8 = socket(0x15, 0x2, 0x8) write(r8, &(0x7f00000002c0)="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", 0xfc) bind$nfc_llcp(r8, &(0x7f0000000000)={0x27, r7, 0x0, 0x0, 0xfc, 0x0, "0f03c8c7e8da000000000000ffffff017f000000cce67e1d7500e565aa9a9d32c7627ffe7a54cdbd77b3000000000000000000060000000000000000deff00", 0x18}, 0x60) setsockopt$nfc_llcp_NFC_LLCP_MIUX(r0, 0x118, 0x1, 0x0, 0x0) socket$inet6_udp(0xa, 0x2, 0x0) [ 93.561120][ T5297] Bluetooth: hci0: command tx timeout [ 93.564700][ T9] cfg80211: failed to load regulatory.db [ 95.575519][ T5297] Bluetooth: hci0: command tx timeout [ 95.815670][ T4664] ================================================================== [ 95.819270][ T4664] BUG: KASAN: slab-use-after-free in hci_conn_drop+0x34/0x2a0 [ 95.822784][ T4664] Write of size 4 at addr ffff8880126a4010 by task kworker/u5:1/4664 [ 95.826437][ T4664] [ 95.827585][ T4664] CPU: 0 UID: 0 PID: 4664 Comm: kworker/u5:1 Not tainted syzkaller #0 PREEMPT(full) [ 95.827627][ T4664] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 95.827636][ T4664] Workqueue: hci0 hci_cmd_sync_work [ 95.827657][ T4664] Call Trace: [ 95.827690][ T4664] [ 95.827738][ T4664] dump_stack_lvl+0xe8/0x150 [ 95.827755][ T4664] print_report+0xba/0x230 [ 95.827766][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 95.827795][ T4664] kasan_report+0x117/0x150 [ 95.827806][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 95.827816][ T4664] kasan_check_range+0x264/0x2c0 [ 95.827826][ T4664] hci_conn_drop+0x34/0x2a0 [ 95.827834][ T4664] ? __pfx_le_read_features_complete+0x10/0x10 [ 95.827848][ T4664] hci_cmd_sync_work+0x262/0x400 [ 95.827861][ T4664] ? process_scheduled_works+0xa25/0x1830 [ 95.827874][ T4664] process_scheduled_works+0xb02/0x1830 [ 95.827892][ T4664] ? __pfx_process_scheduled_works+0x10/0x10 [ 95.827905][ T4664] ? assign_work+0x3d5/0x5e0 [ 95.827917][ T4664] worker_thread+0xa50/0xfc0 [ 95.827935][ T4664] kthread+0x388/0x470 [ 95.827944][ T4664] ? __pfx_worker_thread+0x10/0x10 [ 95.827956][ T4664] ? __pfx_kthread+0x10/0x10 [ 95.827964][ T4664] ret_from_fork+0x51e/0xb90 [ 95.827978][ T4664] ? __pfx_ret_from_fork+0x10/0x10 [ 95.827989][ T4664] ? __switch_to+0xc7d/0x1450 [ 95.828001][ T4664] ? __pfx_kthread+0x10/0x10 [ 95.828011][ T4664] ret_from_fork_asm+0x1a/0x30 [ 95.828031][ T4664] [ 95.828035][ T4664] [ 95.891350][ T4664] Allocated by task 4664: [ 95.893251][ T4664] kasan_save_track+0x3e/0x80 [ 95.895385][ T4664] __kasan_kmalloc+0x93/0xb0 [ 95.897485][ T4664] __kmalloc_cache_noprof+0x31c/0x660 [ 95.899863][ T4664] __hci_conn_add+0x3c4/0x1e00 [ 95.902009][ T4664] le_conn_complete_evt+0x706/0x1430 [ 95.904299][ T4664] hci_le_enh_conn_complete_evt+0x189/0x490 [ 95.906821][ T4664] hci_event_packet+0x7af/0x12c0 [ 95.909058][ T4664] hci_rx_work+0x3ee/0x1030 [ 95.911104][ T4664] process_scheduled_works+0xb02/0x1830 [ 95.913557][ T4664] worker_thread+0xa50/0xfc0 [ 95.915778][ T4664] kthread+0x388/0x470 [ 95.917616][ T4664] ret_from_fork+0x51e/0xb90 [ 95.919658][ T4664] ret_from_fork_asm+0x1a/0x30 [ 95.921866][ T4664] [ 95.923003][ T4664] Freed by task 5297: [ 95.924787][ T4664] kasan_save_track+0x3e/0x80 [ 95.926857][ T4664] kasan_save_free_info+0x46/0x50 [ 95.929150][ T4664] __kasan_slab_free+0x5c/0x80 [ 95.931426][ T4664] kfree+0x1c1/0x630 [ 95.933126][ T4664] device_release+0x9e/0x1d0 [ 95.935147][ T4664] kobject_put+0x228/0x560 [ 95.937215][ T4664] hci_conn_del+0xc36/0x1230 [ 95.939333][ T4664] hci_disconn_complete_evt+0x64e/0x950 [ 95.941943][ T4664] hci_event_packet+0x805/0x12c0 [ 95.944139][ T4664] hci_rx_work+0x3ee/0x1030 [ 95.946131][ T4664] process_scheduled_works+0xb02/0x1830 [ 95.948465][ T4664] worker_thread+0xa50/0xfc0 [ 95.950515][ T4664] kthread+0x388/0x470 [ 95.952396][ T4664] ret_from_fork+0x51e/0xb90 [ 95.954439][ T4664] ret_from_fork_asm+0x1a/0x30 [ 95.956600][ T4664] [ 95.957632][ T4664] The buggy address belongs to the object at ffff8880126a4000 [ 95.957632][ T4664] which belongs to the cache kmalloc-8k of size 8192 [ 95.963639][ T4664] The buggy address is located 16 bytes inside of [ 95.963639][ T4664] freed 8192-byte region [ffff8880126a4000, ffff8880126a6000) [ 95.969484][ T4664] [ 95.970581][ T4664] The buggy address belongs to the physical page: [ 95.973344][ T4664] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126a0 [ 95.977288][ T4664] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 95.981005][ T4664] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) [ 95.984386][ T4664] page_type: f5(slab) [ 95.986158][ T4664] raw: 00fff00000000040 ffff88801a842280 dead000000000100 dead000000000122 [ 95.989823][ T4664] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 95.993598][ T4664] head: 00fff00000000040 ffff88801a842280 dead000000000100 dead000000000122 [ 95.997350][ T4664] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 96.001107][ T4664] head: 00fff00000000003 ffffea000049a801 00000000ffffffff 00000000ffffffff [ 96.004935][ T4664] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 [ 96.008590][ T4664] page dumped because: kasan: bad access detected [ 96.011261][ T4664] page_owner tracks the page as allocated [ 96.013697][ T4664] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4690, tgid 4690 (init), ts 30236917606, free_ts 29499935522 [ 96.021975][ T4664] post_alloc_hook+0x231/0x280 [ 96.023903][ T4664] get_page_from_freelist+0x24dc/0x2580 [ 96.026107][ T4664] __alloc_frozen_pages_noprof+0x18d/0x380 [ 96.028445][ T4664] allocate_slab+0x77/0x660 [ 96.030341][ T4664] refill_objects+0x331/0x3c0 [ 96.032292][ T4664] __pcs_replace_empty_main+0x2b9/0x620 [ 96.034663][ T4664] __kmalloc_cache_noprof+0x392/0x660 [ 96.037083][ T4664] tomoyo_init_log+0x112e/0x1fb0 [ 96.039301][ T4664] tomoyo_supervisor+0x353/0x1570 [ 96.041504][ T4664] tomoyo_env_perm+0x151/0x1f0 [ 96.043502][ T4664] tomoyo_find_next_domain+0x15cb/0x1aa0 [ 96.045922][ T4664] tomoyo_bprm_check_security+0x11b/0x180 [ 96.048347][ T4664] security_bprm_check+0x85/0x240 [ 96.050612][ T4664] bprm_execve+0x896/0x1460 [ 96.052694][ T4664] do_execveat_common+0x50d/0x690 [ 96.054903][ T4664] __x64_sys_execve+0x97/0xc0 [ 96.057024][ T4664] page last free pid 1 tgid 1 stack trace: [ 96.059613][ T4664] __free_frozen_pages+0xc2b/0xdb0 [ 96.061912][ T4664] free_reserved_page+0xce/0x120 [ 96.064136][ T4664] free_reserved_area+0x90/0x190 [ 96.066369][ T4664] free_kernel_image_pages+0xa2/0x100 [ 96.068761][ T4664] kernel_init+0x31/0x1d0 [ 96.070689][ T4664] ret_from_fork+0x51e/0xb90 [ 96.072736][ T4664] ret_from_fork_asm+0x1a/0x30 [ 96.074750][ T4664] [ 96.075789][ T4664] Memory state around the buggy address: [ 96.078192][ T4664] ffff8880126a3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.081601][ T4664] ffff8880126a3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.085162][ T4664] >ffff8880126a4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.088720][ T4664] ^ [ 96.090815][ T4664] ffff8880126a4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.094369][ T4664] ffff8880126a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.097867][ T4664] ================================================================== [ 96.103986][ T4664] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 96.107035][ T4664] CPU: 0 UID: 0 PID: 4664 Comm: kworker/u5:1 Not tainted syzkaller #0 PREEMPT(full) [ 96.110925][ T4664] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 96.115308][ T4664] Workqueue: hci0 hci_cmd_sync_work [ 96.117688][ T4664] Call Trace: [ 96.119219][ T4664] [ 96.120574][ T4664] vpanic+0x56c/0xa60 [ 96.122444][ T4664] ? __pfx_vpanic+0x10/0x10 [ 96.124400][ T4664] panic+0xc5/0xd0 [ 96.126092][ T4664] ? __pfx_panic+0x10/0x10 [ 96.127985][ T4664] ? preempt_schedule_thunk+0x16/0x30 [ 96.130298][ T4664] ? preempt_schedule_thunk+0x16/0x30 [ 96.132546][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 96.134650][ T4664] check_panic_on_warn+0x89/0xb0 [ 96.136883][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 96.138997][ T4664] end_report+0x73/0x180 [ 96.140772][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 96.142752][ T4664] kasan_report+0x128/0x150 [ 96.144615][ T4664] ? hci_conn_drop+0x34/0x2a0 [ 96.146681][ T4664] kasan_check_range+0x264/0x2c0 [ 96.148873][ T4664] hci_conn_drop+0x34/0x2a0 [ 96.150977][ T4664] ? __pfx_le_read_features_complete+0x10/0x10 [ 96.156365][ T4664] hci_cmd_sync_work+0x262/0x400 [ 96.159139][ T4664] ? process_scheduled_works+0xa25/0x1830 [ 96.161751][ T4664] process_scheduled_works+0xb02/0x1830 [ 96.164567][ T4664] ? __pfx_process_scheduled_works+0x10/0x10 [ 96.167058][ T4664] ? assign_work+0x3d5/0x5e0 [ 96.169146][ T4664] worker_thread+0xa50/0xfc0 [ 96.171220][ T4664] kthread+0x388/0x470 [ 96.172885][ T4664] ? __pfx_worker_thread+0x10/0x10 [ 96.175160][ T4664] ? __pfx_kthread+0x10/0x10 [ 96.177301][ T4664] ret_from_fork+0x51e/0xb90 [ 96.179360][ T4664] ? __pfx_ret_from_fork+0x10/0x10 [ 96.181651][ T4664] ? __switch_to+0xc7d/0x1450 [ 96.183682][ T4664] ? __pfx_kthread+0x10/0x10 [ 96.185719][ T4664] ret_from_fork_asm+0x1a/0x30 [ 96.187758][ T4664] [ 96.189465][ T4664] Kernel Offset: disabled [ 96.191241][ T4664] Rebooting in 86400 seconds..