program: mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./myconfig\x00', 0x1ff) mount(0x0, &(0x7f00000001c0)='./myconfig\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000240)='./myconfig/usb_gadget/g1\x00', 0x1ff) mkdirat(0xffffffffffffff9c, &(0x7f00000003c0)='./myconfig/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff) r0 = socket$nl_generic(0x10, 0x3, 0x10) r1 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000080), 0xffffffffffffffff) ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f00000000c0)={'wlan0\x00', 0x0}) sendmsg$NL80211_CMD_SET_INTERFACE(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000340)={&(0x7f0000000180)={0x24, r1, 0x5, 0x0, 0x0, {{}, {@val={0x8, 0x3, r2}, @void}}, [@NL80211_ATTR_IFTYPE={0x8, 0x5, 0x9}]}, 0x24}}, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f00000003c0)={0xffffffffffffffff}) r4 = socket$nl_generic(0x10, 0x3, 0x10) r5 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000f80), 0xffffffffffffffff) ioctl$sock_SIOCGIFINDEX_80211(r3, 0x8933, &(0x7f0000000300)={'wlan0\x00', 0x0}) sendmsg$NL80211_CMD_NEW_STATION(r4, &(0x7f0000001080)={0x0, 0x0, &(0x7f0000001040)={&(0x7f0000000400)={0x40, r5, 0xb97534d5fe9704cf, 0x0, 0x0, {{}, {@val={0x8, 0x3, r6}, @void}}, [@NL80211_ATTR_STA_SUPPORTED_RATES={0x4}, @NL80211_ATTR_MAC={0xa}, @NL80211_ATTR_STA_AID={0x6, 0x10, 0x580}, @NL80211_ATTR_STA_LISTEN_INTERVAL={0x6}, @NL80211_ATTR_STA_FLAGS={0x4}]}, 0x40}, 0x1, 0x0, 0x0, 0x40000c0}, 0x0) r7 = openat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1/functions/uac2.usb0/p_srate\x00', 0x1, 0x0) write(r7, &(0x7f0000000000)="46c4e042302c35", 0x7) syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') [ 109.464150][ T5288] Bluetooth: hci0: command tx timeout [ 109.714802][ T5328] ================================================================== [ 109.718879][ T5328] BUG: KASAN: invalid-free in f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.723452][ T5328] Free of addr ffff88804455a706 by task syz.0.0/5328 [ 109.727143][ T5328] [ 109.728399][ T5328] CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 109.728423][ T5328] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 109.728432][ T5328] Call Trace: [ 109.728440][ T5328] [ 109.728448][ T5328] dump_stack_lvl+0xe8/0x150 [ 109.728475][ T5328] print_address_description+0x55/0x1e0 [ 109.728496][ T5328] print_report+0x58/0x70 [ 109.728515][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.728528][ T5328] kasan_report_invalid_free+0xea/0x110 [ 109.728548][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.728563][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.728577][ T5328] __kasan_slab_pre_free+0x104/0x120 [ 109.728593][ T5328] kfree+0x173/0x640 [ 109.728605][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.728621][ T5328] f_uac2_opts_p_srate_store+0x225/0x2b0 [ 109.728637][ T5328] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10 [ 109.728654][ T5328] ? down_read+0x2be/0x330 [ 109.728670][ T5328] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10 [ 109.728685][ T5328] configfs_write_iter+0x337/0x430 [ 109.728701][ T5328] vfs_write+0x612/0xba0 [ 109.728723][ T5328] ? __pfx_vfs_write+0x10/0x10 [ 109.728744][ T5328] ? __fget_files+0x2a/0x420 [ 109.728759][ T5328] ksys_write+0x150/0x270 [ 109.728774][ T5328] ? __pfx_ksys_write+0x10/0x10 [ 109.728793][ T5328] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 109.728816][ T5328] do_syscall_64+0x174/0x580 [ 109.728832][ T5328] ? trace_irq_disable+0x3b/0x140 [ 109.728852][ T5328] ? clear_bhb_loop+0x40/0x90 [ 109.728868][ T5328] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 109.728882][ T5328] RIP: 0033:0x7f9e17d9e019 [ 109.728896][ T5328] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 [ 109.728906][ T5328] RSP: 002b:00007f9e18cf7fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 109.728922][ T5328] RAX: ffffffffffffffda RBX: 00007f9e18025fa0 RCX: 00007f9e17d9e019 [ 109.728931][ T5328] RDX: 0000000000000007 RSI: 0000200000000000 RDI: 0000000000000007 [ 109.728939][ T5328] RBP: 00007f9e17e3500c R08: 0000000000000000 R09: 0000000000000000 [ 109.728946][ T5328] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 109.728954][ T5328] R13: 00007f9e18026038 R14: 00007f9e18025fa0 R15: 00007ffca639d008 [ 109.728966][ T5328] [ 109.728971][ T5328] [ 109.854937][ T5328] Allocated by task 5328: [ 109.857333][ T5328] kasan_save_track+0x3e/0x80 [ 109.859707][ T5328] __kasan_kmalloc+0x93/0xb0 [ 109.862243][ T5328] __kmalloc_node_track_caller_noprof+0x4c3/0x730 [ 109.866186][ T5328] kstrdup+0x42/0x100 [ 109.868526][ T5328] f_uac2_opts_p_srate_store+0x11f/0x2b0 [ 109.871408][ T5328] configfs_write_iter+0x337/0x430 [ 109.874241][ T5328] vfs_write+0x612/0xba0 [ 109.876700][ T5328] ksys_write+0x150/0x270 [ 109.879277][ T5328] do_syscall_64+0x174/0x580 [ 109.881844][ T5328] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 109.885176][ T5328] [ 109.886752][ T5328] The buggy address belongs to the object at ffff88804455a700 [ 109.886752][ T5328] which belongs to the cache kmalloc-8 of size 8 [ 109.894205][ T5328] The buggy address is located 6 bytes inside of [ 109.894205][ T5328] 8-byte region [ffff88804455a700, ffff88804455a708) [ 109.903815][ T5328] [ 109.905087][ T5328] The buggy address belongs to the physical page: [ 109.908205][ T5328] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804455adc0 pfn:0x4455a [ 109.913516][ T5328] flags: 0x4fff00000000200(workingset|node=1|zone=1|lastcpupid=0x7ff) [ 109.917708][ T5328] page_type: f5(slab) [ 109.919899][ T5328] raw: 04fff00000000200 ffff88801b041500 ffff888030400348 ffffea0000f80d10 [ 109.924483][ T5328] raw: ffff88804455adc0 000000080080006e 00000000f5000000 0000000000000000 [ 109.929492][ T5328] page dumped because: kasan: bad access detected [ 109.933355][ T5328] page_owner tracks the page as allocated [ 109.936324][ T5328] page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5287, tgid 5287 (syz-executor), ts 105229689940, free_ts 105223752805 [ 109.947860][ T5328] post_alloc_hook+0x1f9/0x250 [ 109.950561][ T5328] get_page_from_freelist+0x21fa/0x2270 [ 109.954123][ T5328] __alloc_frozen_pages_noprof+0x18d/0x380 [ 109.957272][ T5328] allocate_slab+0x79/0x5e0 [ 109.959772][ T5328] refill_objects+0x2d5/0x350 [ 109.962404][ T5328] __pcs_replace_empty_main+0x2bf/0x6b0 [ 109.965946][ T5328] __kmalloc_node_track_caller_noprof+0x557/0x730 [ 109.969458][ T5328] kvasprintf+0xeb/0x1a0 [ 109.971583][ T5328] kobject_set_name_vargs+0x61/0x110 [ 109.974118][ T5328] kobject_init_and_add+0xee/0x1a0 [ 109.977335][ T5328] netdev_queue_update_kobjects+0x249/0x6b0 [ 109.980432][ T5328] netdev_register_kobject+0x258/0x310 [ 109.982896][ T5328] register_netdevice+0x1433/0x1eb0 [ 109.985792][ T5328] macvlan_common_newlink+0x126b/0x19f0 [ 109.989269][ T5328] macvtap_newlink+0x13c/0x1b0 [ 109.991941][ T5328] rtnl_newlink_create+0x310/0xb00 [ 109.994203][ T5328] page last free pid 1888 tgid 1888 stack trace: [ 109.996942][ T5328] __free_frozen_pages+0xc1e/0xd10 [ 109.999557][ T5328] rcu_core+0x78b/0x10a0 [ 110.002263][ T5328] handle_softirqs+0x225/0x840 [ 110.005077][ T5328] __irq_exit_rcu+0xca/0x220 [ 110.007240][ T5328] irq_exit_rcu+0x9/0x30 [ 110.009117][ T5328] sysvec_apic_timer_interrupt+0xa6/0xc0 [ 110.011475][ T5328] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 110.014067][ T5328] [ 110.015333][ T5328] Memory state around the buggy address: [ 110.018267][ T5328] ffff88804455a600: 05 fc fc fc 05 fc fc fc fc fc fc fc fc fc fc fc [ 110.022165][ T5328] ffff88804455a680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 110.025993][ T5328] >ffff88804455a700: 00 fc fc fc 00 fc fc fc 00 fc fc fc 00 fc fc fc [ 110.030511][ T5328] ^ [ 110.032511][ T5328] ffff88804455a780: 00 fc fc fc 00 fc fc fc 00 fc fc fc 00 fc fc fc [ 110.036125][ T5328] ffff88804455a800: 00 fc fc fc 00 fc fc fc 00 fc fc fc 00 fc fc fc [ 110.039677][ T5328] ================================================================== [ 110.094207][ T5328] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 110.097150][ T5328] CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 110.100946][ T5328] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 110.105462][ T5328] Call Trace: [ 110.107158][ T5328] [ 110.108603][ T5328] vpanic+0x56c/0xa60 [ 110.110496][ T5328] ? __pfx_vpanic+0x10/0x10 [ 110.112307][ T5328] ? __pfx___schedule+0x10/0x10 [ 110.115063][ T5328] panic+0xc5/0xd0 [ 110.117020][ T5328] ? __pfx_panic+0x10/0x10 [ 110.119213][ T5328] ? preempt_schedule_common+0x82/0xd0 [ 110.121242][ T5328] check_panic_on_warn+0x89/0xb0 [ 110.123191][ T5328] end_report+0x73/0x170 [ 110.125045][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 110.127527][ T5328] kasan_report_invalid_free+0xfa/0x110 [ 110.129829][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 110.132432][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 110.135121][ T5328] __kasan_slab_pre_free+0x104/0x120 [ 110.137425][ T5328] kfree+0x173/0x640 [ 110.139569][ T5328] ? f_uac2_opts_p_srate_store+0x225/0x2b0 [ 110.142580][ T5328] f_uac2_opts_p_srate_store+0x225/0x2b0 [ 110.145478][ T5328] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10 [ 110.147779][ T5328] ? down_read+0x2be/0x330 [ 110.149720][ T5328] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10 [ 110.152759][ T5328] configfs_write_iter+0x337/0x430 [ 110.155694][ T5328] vfs_write+0x612/0xba0 [ 110.158141][ T5328] ? __pfx_vfs_write+0x10/0x10 [ 110.160272][ T5328] ? __fget_files+0x2a/0x420 [ 110.162297][ T5328] ksys_write+0x150/0x270 [ 110.164390][ T5328] ? __pfx_ksys_write+0x10/0x10 [ 110.166894][ T5328] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 110.170361][ T5328] do_syscall_64+0x174/0x580 [ 110.172866][ T5328] ? trace_irq_disable+0x3b/0x140 [ 110.175299][ T5328] ? clear_bhb_loop+0x40/0x90 [ 110.177316][ T5328] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 110.179809][ T5328] RIP: 0033:0x7f9e17d9e019 [ 110.181853][ T5328] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 [ 110.190218][ T5328] RSP: 002b:00007f9e18cf7fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 110.193667][ T5328] RAX: ffffffffffffffda RBX: 00007f9e18025fa0 RCX: 00007f9e17d9e019 [ 110.197179][ T5328] RDX: 0000000000000007 RSI: 0000200000000000 RDI: 0000000000000007 [ 110.200576][ T5328] RBP: 00007f9e17e3500c R08: 0000000000000000 R09: 0000000000000000 [ 110.204086][ T5328] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 110.208128][ T5328] R13: 00007f9e18026038 R14: 00007f9e18025fa0 R15: 00007ffca639d008 [ 110.213090][ T5328] [ 110.215255][ T5328] Kernel Offset: disabled [ 110.217040][ T5328] Rebooting in 86400 seconds..