program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./myconfig\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./myconfig\x00', 0x10)
ioctl$RTC_ALM_READ(0xffffffffffffffff, 0x80247008, &(0x7f0000000000))
mount(0x0, &(0x7f00000001c0)='./myconfig\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000240)='./myconfig/usb_gadget/g1\x00', 0x1ff)
mkdirat(0xffffffffffffff9c, &(0x7f00000003c0)='./myconfig/usb_gadget/g1/functions/uac2.usb0\x00', 0x1ff)
perf_event_open(&(0x7f0000000180)={0x0, 0x80, 0x48, 0x1, 0x7, 0x0, 0x0, 0x0, 0x4000, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xfffffffb, 0x0, @perf_config_ext={0x0, 0xc}, 0x0, 0x0, 0x4, 0x8, 0x3fe, 0x0, 0x4, 0x0, 0x42000}, 0x0, 0xa, 0xffffffffffffffff, 0x3)
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$nl_generic(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000180)={&(0x7f00000001c0)=ANY=[@ANYBLOB="30000000410007012bbd700000000000047c00000400c2800c00018006000600655800000c000280080011"], 0x30}, 0x1, 0x0, 0x0, 0x4048011}, 0xc000)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000400)='./myconfig/usb_gadget/g1/functions/uac2.usb0/p_srate\x00', 0x1, 0x0)
write(r1, &(0x7f0000000040)="57343130302c34383070302c38383230302c39363030382c313736343030000004003030303933", 0x27)
syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00')
[ 153.307084][ T5342] openvswitch: netlink: Actions may not be safe on all matching packets
[ 153.313649][ T5342] ==================================================================
[ 153.317917][ T5342] BUG: KASAN: invalid-free in f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.321479][ T5342] Free of addr ffff8880439da806 by task syz.0.0/5342
[ 153.324358][ T5342]
[ 153.325395][ T5342] CPU: 0 UID: 0 PID: 5342 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 153.325415][ T5342] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 153.325423][ T5342] Call Trace:
[ 153.325429][ T5342]
[ 153.325436][ T5342] dump_stack_lvl+0xe8/0x150
[ 153.325459][ T5342] print_address_description+0x55/0x1e0
[ 153.325475][ T5342] print_report+0x58/0x70
[ 153.325489][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.325502][ T5342] kasan_report_invalid_free+0xea/0x110
[ 153.325518][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.325530][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.325544][ T5342] __kasan_slab_pre_free+0x104/0x120
[ 153.325557][ T5342] kfree+0x173/0x640
[ 153.325568][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.325580][ T5342] f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.325594][ T5342] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10
[ 153.325609][ T5342] ? down_read+0x2be/0x330
[ 153.325624][ T5342] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10
[ 153.325636][ T5342] configfs_write_iter+0x337/0x430
[ 153.325653][ T5342] vfs_write+0x612/0xba0
[ 153.325669][ T5342] ? __pfx_vfs_write+0x10/0x10
[ 153.325685][ T5342] ? __fget_files+0x2a/0x420
[ 153.325698][ T5342] ksys_write+0x150/0x270
[ 153.325712][ T5342] ? __pfx_ksys_write+0x10/0x10
[ 153.325726][ T5342] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 153.325738][ T5342] do_syscall_64+0x174/0x580
[ 153.325750][ T5342] ? trace_irq_disable+0x3b/0x140
[ 153.325763][ T5342] ? clear_bhb_loop+0x40/0x90
[ 153.325775][ T5342] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 153.325786][ T5342] RIP: 0033:0x7f602e59e019
[ 153.325798][ T5342] 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
[ 153.325808][ T5342] RSP: 002b:00007f602f41ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 153.325821][ T5342] RAX: ffffffffffffffda RBX: 00007f602e825fa0 RCX: 00007f602e59e019
[ 153.325830][ T5342] RDX: 0000000000000027 RSI: 0000200000000040 RDI: 0000000000000004
[ 153.325836][ T5342] RBP: 00007f602e63500c R08: 0000000000000000 R09: 0000000000000000
[ 153.325844][ T5342] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 153.325850][ T5342] R13: 00007f602e826038 R14: 00007f602e825fa0 R15: 00007ffcfa457ed8
[ 153.325863][ T5342]
[ 153.325867][ T5342]
[ 153.452229][ T5342] Allocated by task 5342:
[ 153.454634][ T5342] kasan_save_track+0x3e/0x80
[ 153.457383][ T5342] __kasan_kmalloc+0x93/0xb0
[ 153.459780][ T5342] __kmalloc_node_track_caller_noprof+0x4c3/0x730
[ 153.462671][ T5342] kstrdup+0x42/0x100
[ 153.464618][ T5342] f_uac2_opts_p_srate_store+0x11f/0x2b0
[ 153.467619][ T5342] configfs_write_iter+0x337/0x430
[ 153.470322][ T5342] vfs_write+0x612/0xba0
[ 153.472337][ T5342] ksys_write+0x150/0x270
[ 153.474214][ T5342] do_syscall_64+0x174/0x580
[ 153.476016][ T5342] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 153.478270][ T5342]
[ 153.479473][ T5342] The buggy address belongs to the object at ffff8880439da800
[ 153.479473][ T5342] which belongs to the cache kmalloc-32 of size 32
[ 153.486192][ T5342] The buggy address is located 6 bytes inside of
[ 153.486192][ T5342] 31-byte region [ffff8880439da800, ffff8880439da81f)
[ 153.491625][ T5342]
[ 153.492713][ T5342] The buggy address belongs to the physical page:
[ 153.495451][ T5342] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880439da2c0 pfn:0x439da
[ 153.500050][ T5342] flags: 0x4fff00000000200(workingset|node=1|zone=1|lastcpupid=0x7ff)
[ 153.503361][ T5342] page_type: f5(slab)
[ 153.505204][ T5342] raw: 04fff00000000200 ffff88801b041780 ffff8880304004c8 ffffea00010ea290
[ 153.508754][ T5342] raw: ffff8880439da2c0 0000000800400030 00000000f5000000 0000000000000000
[ 153.512318][ T5342] page dumped because: kasan: bad access detected
[ 153.515352][ T5342] page_owner tracks the page as allocated
[ 153.518038][ T5342] page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5138, tgid 5138 (rm), ts 115025823049, free_ts 85463486569
[ 153.526187][ T5342] post_alloc_hook+0x1f9/0x250
[ 153.528644][ T5342] get_page_from_freelist+0x21fa/0x2270
[ 153.531351][ T5342] __alloc_frozen_pages_noprof+0x18d/0x380
[ 153.533806][ T5342] allocate_slab+0x79/0x5e0
[ 153.535816][ T5342] refill_objects+0x2d5/0x350
[ 153.537893][ T5342] __pcs_replace_empty_main+0x2bf/0x6b0
[ 153.540253][ T5342] __kmalloc_cache_noprof+0x3a7/0x660
[ 153.542625][ T5342] kmem_cache_free+0x156/0x650
[ 153.544813][ T5342] __put_anon_vma+0x12b/0x2d0
[ 153.547167][ T5342] unlink_anon_vmas+0x589/0x730
[ 153.550046][ T5342] free_pgtables+0x836/0xb70
[ 153.552962][ T5342] exit_mmap+0x4aa/0x9f0
[ 153.555193][ T5342] __mmput+0x118/0x420
[ 153.557358][ T5342] setup_new_exec+0x30d/0x360
[ 153.559875][ T5342] load_elf_binary+0xbcf/0x2950
[ 153.562367][ T5342] bprm_execve+0x9c7/0x1630
[ 153.564868][ T5342] page last free pid 4705 tgid 4705 stack trace:
[ 153.568681][ T5342] __free_frozen_pages+0xc1e/0xd10
[ 153.571728][ T5342] tlb_remove_table_rcu+0x85/0x100
[ 153.574134][ T5342] rcu_core+0x78b/0x10a0
[ 153.576013][ T5342] handle_softirqs+0x225/0x840
[ 153.578196][ T5342] __irq_exit_rcu+0xca/0x220
[ 153.580734][ T5342] irq_exit_rcu+0x9/0x30
[ 153.583144][ T5342] sysvec_apic_timer_interrupt+0xa6/0xc0
[ 153.585968][ T5342] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 153.588821][ T5342]
[ 153.589872][ T5342] Memory state around the buggy address:
[ 153.592318][ T5342] ffff8880439da700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[ 153.596424][ T5342] ffff8880439da780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[ 153.601624][ T5342] >ffff8880439da800: 00 00 00 07 fc fc fc fc 00 00 00 00 fc fc fc fc
[ 153.605184][ T5342] ^
[ 153.606847][ T5342] ffff8880439da880: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc
[ 153.610563][ T5342] ffff8880439da900: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
[ 153.614475][ T5342] ==================================================================
[ 153.621857][ T5342] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 153.625287][ T5342] CPU: 0 UID: 0 PID: 5342 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 153.629013][ T5342] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 153.634900][ T5342] Call Trace:
[ 153.636591][ T5342]
[ 153.638058][ T5342] vpanic+0x56c/0xa60
[ 153.639975][ T5342] ? __pfx_vpanic+0x10/0x10
[ 153.641861][ T5342] ? __pfx___schedule+0x10/0x10
[ 153.643980][ T5342] panic+0xc5/0xd0
[ 153.645624][ T5342] ? __pfx_panic+0x10/0x10
[ 153.648053][ T5342] ? preempt_schedule_common+0x82/0xd0
[ 153.651228][ T5342] check_panic_on_warn+0x89/0xb0
[ 153.653868][ T5342] end_report+0x73/0x170
[ 153.655791][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.658300][ T5342] kasan_report_invalid_free+0xfa/0x110
[ 153.660913][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.663884][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.667168][ T5342] __kasan_slab_pre_free+0x104/0x120
[ 153.670030][ T5342] kfree+0x173/0x640
[ 153.672212][ T5342] ? f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.675158][ T5342] f_uac2_opts_p_srate_store+0x225/0x2b0
[ 153.677972][ T5342] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10
[ 153.681121][ T5342] ? down_read+0x2be/0x330
[ 153.683493][ T5342] ? __pfx_f_uac2_opts_p_srate_store+0x10/0x10
[ 153.686552][ T5342] configfs_write_iter+0x337/0x430
[ 153.688746][ T5342] vfs_write+0x612/0xba0
[ 153.690499][ T5342] ? __pfx_vfs_write+0x10/0x10
[ 153.692787][ T5342] ? __fget_files+0x2a/0x420
[ 153.695245][ T5342] ksys_write+0x150/0x270
[ 153.697389][ T5342] ? __pfx_ksys_write+0x10/0x10
[ 153.699436][ T5342] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 153.701826][ T5342] do_syscall_64+0x174/0x580
[ 153.704333][ T5342] ? trace_irq_disable+0x3b/0x140
[ 153.706987][ T5342] ? clear_bhb_loop+0x40/0x90
[ 153.709675][ T5342] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 153.713077][ T5342] RIP: 0033:0x7f602e59e019
[ 153.715416][ T5342] 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
[ 153.725328][ T5342] RSP: 002b:00007f602f41ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 153.729927][ T5342] RAX: ffffffffffffffda RBX: 00007f602e825fa0 RCX: 00007f602e59e019
[ 153.733757][ T5342] RDX: 0000000000000027 RSI: 0000200000000040 RDI: 0000000000000004
[ 153.737652][ T5342] RBP: 00007f602e63500c R08: 0000000000000000 R09: 0000000000000000
[ 153.741447][ T5342] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 153.744958][ T5342] R13: 00007f602e826038 R14: 00007f602e825fa0 R15: 00007ffcfa457ed8
[ 153.748554][ T5342]
[ 153.750509][ T5342] Kernel Offset: disabled
[ 153.752525][ T5342] Rebooting in 86400 seconds..