ci2-android-5-15/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-15/syz-executor3604995777
<...>
Warning: Permanently added '10.128.1.60' (ED25519) to the list of known hosts.
execve("ci2-android-5-15/syz-executor3604995777", ["ci2-android-5-15/syz-executor3604995777"], 0x7ffcd9d04010 /* 10 vars */) = 0
brk(NULL) = 0x555566f42000
brk(0x555566f42d40) = 0x555566f42d40
arch_prctl(ARCH_SET_FS, 0x555566f423c0) = 0
set_tid_address(0x555566f42690) = 303
set_robust_list(0x555566f426a0, 24) = 0
rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 32, 0, 0x53053053) = -1 ENOSYS (Function not implemented)
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-android-5-15/syz-executor3604995777", 4096) = 45
getrandom("\x91\xfc\x3e\xa1\x35\xfc\xb4\x61", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555566f42d40
brk(0x555566f63d40) = 0x555566f63d40
brk(0x555566f64000) = 0x555566f64000
mprotect(0x7fbe6685e000, 20480, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
executing program
write(1, "executing program\n", 18) = 18
mkdir("./config", 0777) = 0
mount(NULL, "./config", "configfs", 0, NULL) = 0
mkdir("./config/usb_gadget/g2", 0777) = 0
rmdir("./config/usb_gadget/g2") = 0
mkdirat(AT_FDCWD, "./config/usb_gadget/g1", 0777) = 0
[ 24.380793][ T30] audit: type=1400 audit(1785427465.234:64): avc: denied { execmem } for pid=303 comm="syz-executor360" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 24.401396][ T30] audit: type=1400 audit(1785427465.254:65): avc: denied { mounton } for pid=303 comm="syz-executor360" path="/root/config" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[ 24.401625][ T303] ==================================================================
[ 24.427623][ T30] audit: type=1400 audit(1785427465.254:66): avc: denied { mount } for pid=303 comm="syz-executor360" name="/" dev="configfs" ino=47 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1
[ 24.432272][ T303] BUG: KASAN: use-after-free in kobject_get+0x113/0x120
[ 24.455075][ T30] audit: type=1400 audit(1785427465.254:67): avc: denied { search } for pid=303 comm="syz-executor360" name="/" dev="configfs" ino=47 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1
[ 24.461943][ T303] Read of size 1 at addr ffff88810b07083c by task syz-executor360/303
[ 24.461959][ T303]
[ 24.461975][ T303] CPU: 0 PID: 303 Comm: syz-executor360 Not tainted syzkaller #0
[ 24.484091][ T30] audit: type=1400 audit(1785427465.254:68): avc: denied { write } for pid=303 comm="syz-executor360" name="usb_gadget" dev="configfs" ino=48 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1
[ 24.492188][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 24.492212][ T303] Call Trace:
[ 24.492218][ T303]
[ 24.492223][ T303] __dump_stack+0x21/0x30
[ 24.492242][ T303] dump_stack_lvl+0x110/0x170
[ 24.492254][ T303] ? show_regs_print_info+0x20/0x20
[ 24.495369][ T30] audit: type=1400 audit(1785427465.254:69): avc: denied { add_name } for pid=303 comm="syz-executor360" name="g2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1
[ 24.502252][ T303] ? load_image+0x3f0/0x3f0
[ 24.502274][ T303] print_address_description+0x7f/0x2c0
[ 24.525306][ T30] audit: type=1400 audit(1785427465.254:70): avc: denied { create } for pid=303 comm="syz-executor360" name="g2" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1
[ 24.535117][ T303] ? kobject_get+0x113/0x120
[ 24.535138][ T303] kasan_report+0x10f/0x150
[ 24.538844][ T30] audit: type=1400 audit(1785427465.254:71): avc: denied { remove_name } for pid=303 comm="syz-executor360" name="g2" dev="configfs" ino=428 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1
[ 24.541574][ T303] ? kobject_get+0x113/0x120
[ 24.541592][ T303] __asan_report_load1_noabort+0x14/0x20
[ 24.546083][ T30] audit: type=1400 audit(1785427465.254:72): avc: denied { rmdir } for pid=303 comm="syz-executor360" name="g2" dev="configfs" ino=428 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1
[ 24.550545][ T303] kobject_get+0x113/0x120
[ 24.674603][ T303] device_add+0x2f0/0xe90
[ 24.678916][ T303] device_create+0x26c/0x300
[ 24.683486][ T303] ? root_device_unregister+0x80/0x80
[ 24.688846][ T303] create_function_device+0x60/0x70
[ 24.694023][ T303] f_midi_alloc_inst+0x1a8/0x380
[ 24.698937][ T303] usb_get_function_instance+0xe2/0x2f0
[ 24.704472][ T303] function_make+0x118/0x350
[ 24.709052][ T303] ? gadget_dev_desc_max_speed_store+0x240/0x240
[ 24.715369][ T303] ? wait_for_completion_killable_timeout+0x10/0x10
[ 24.721930][ T303] ? __kmalloc+0x13d/0x2c0
[ 24.726339][ T303] ? configfs_mkdir+0x444/0x9c0
[ 24.731162][ T303] configfs_mkdir+0x50a/0x9c0
[ 24.735814][ T303] vfs_mkdir+0x38b/0x590
[ 24.740037][ T303] do_mkdirat+0x174/0x4d0
[ 24.744339][ T303] __x64_sys_mkdirat+0x89/0xa0
[ 24.749075][ T303] x64_sys_call+0x37e/0x9a0
[ 24.753569][ T303] do_syscall_64+0x4c/0xa0
[ 24.757956][ T303] ? clear_bhb_loop+0x50/0xa0
[ 24.762618][ T303] ? clear_bhb_loop+0x50/0xa0
[ 24.767289][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 24.773162][ T303] RIP: 0033:0x7fbe667cdc79
[ 24.777555][ T303] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
[ 24.797149][ T303] RSP: 002b:00007ffd10a8fa78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 24.805560][ T303] RAX: ffffffffffffffda RBX: 0000200000000100 RCX: 00007fbe667cdc79
[ 24.813513][ T303] RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
[ 24.821480][ T303] RBP: 0032672f74656764 R08: 0000000000000000 R09: 0000000000000000
[ 24.829432][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd10a8fbb8
[ 24.837403][ T303] R13: 0000000000000002 R14: 00007fbe6685eca0 R15: 0000000000000002
[ 24.845372][ T303]
[ 24.848369][ T303]
[ 24.850669][ T303] Allocated by task 303:
[ 24.854881][ T303] __kasan_kmalloc+0xd4/0x100
[ 24.859536][ T303] kmem_cache_alloc_trace+0x119/0x270
[ 24.864902][ T303] device_create+0x13a/0x300
[ 24.869474][ T303] gadgets_make+0x816/0xa70
[ 24.873958][ T303] configfs_mkdir+0x50a/0x9c0
[ 24.878607][ T303] vfs_mkdir+0x38b/0x590
[ 24.882841][ T303] do_mkdirat+0x174/0x4d0
[ 24.887144][ T303] __x64_sys_mkdir+0x6e/0x80
[ 24.891706][ T303] x64_sys_call+0x124/0x9a0
[ 24.896182][ T303] do_syscall_64+0x4c/0xa0
[ 24.900576][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 24.906463][ T303]
[ 24.908772][ T303] Freed by task 303:
[ 24.912641][ T303] kasan_set_track+0x4a/0x70
[ 24.917220][ T303] kasan_set_free_info+0x23/0x40
[ 24.922141][ T303] ____kasan_slab_free+0x125/0x160
[ 24.927234][ T303] __kasan_slab_free+0x11/0x20
[ 24.931983][ T303] slab_free_freelist_hook+0xc2/0x190
[ 24.937370][ T303] kfree+0xc4/0x270
[ 24.941174][ T303] device_create_release+0x15/0x20
[ 24.946268][ T303] device_release+0x96/0x1c0
[ 24.950840][ T303] kobject_put+0x18a/0x270
[ 24.955272][ T303] device_destroy+0xb4/0xf0
[ 24.959760][ T303] gadgets_drop+0xa0/0xd0
[ 24.964075][ T303] configfs_rmdir+0x871/0x960
[ 24.968736][ T303] vfs_rmdir+0x1ae/0x450
[ 24.972956][ T303] do_rmdir+0x261/0x6b0
[ 24.977089][ T303] __x64_sys_rmdir+0x49/0x50
[ 24.981675][ T303] x64_sys_call+0x25f/0x9a0
[ 24.986161][ T303] do_syscall_64+0x4c/0xa0
[ 24.990559][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 24.996434][ T303]
[ 24.998738][ T303] The buggy address belongs to the object at ffff88810b070800
[ 24.998738][ T303] which belongs to the cache kmalloc-1k of size 1024
[ 25.012771][ T303] The buggy address is located 60 bytes inside of
[ 25.012771][ T303] 1024-byte region [ffff88810b070800, ffff88810b070c00)
[ 25.026051][ T303] The buggy address belongs to the page:
[ 25.031674][ T303] page:ffffea00042c1c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b070
[ 25.041896][ T303] head:ffffea00042c1c00 order:3 compound_mapcount:0 compound_pincount:0
[ 25.050200][ T303] flags: 0x4000000000010200(slab|head|zone=1)
[ 25.056257][ T303] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
[ 25.064820][ T303] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 25.073379][ T303] page dumped because: kasan: bad access detected
[ 25.079768][ T303] page_owner tracks the page as allocated
[ 25.085465][ T303] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 2031452132, free_ts 0
[ 25.101765][ T303] post_alloc_hook+0x192/0x1b0
[ 25.106536][ T303] prep_new_page+0x1c/0x110
[ 25.111035][ T303] get_page_from_freelist+0x2c3a/0x2cd0
[ 25.116574][ T303] __alloc_pages+0x1a2/0x460
[ 25.121153][ T303] new_slab+0xa0/0x4d0
[ 25.125220][ T303] ___slab_alloc+0x3ac/0x840
[ 25.129815][ T303] __slab_alloc+0x49/0x90
[ 25.134133][ T303] __kmalloc+0x16a/0x2c0
[ 25.138364][ T303] blk_mq_realloc_hw_ctxs+0x40d/0x1660
[ 25.143808][ T303] blk_mq_init_allocated_queue+0x3ea/0x1770
[ 25.149687][ T303] blk_mq_init_queue+0x6c/0xd0
[ 25.154446][ T303] scsi_alloc_sdev+0x66c/0x9c0
[ 25.159284][ T303] scsi_probe_and_add_lun+0x180/0x35d0
[ 25.164734][ T303] __scsi_scan_target+0x1d2/0xb70
[ 25.169748][ T303] scsi_scan_host_selected+0x34e/0x600
[ 25.175186][ T303] scsi_scan_host+0x39e/0x670
[ 25.179842][ T303] page_owner free stack trace missing
[ 25.185188][ T303]
[ 25.187491][ T303] Memory state around the buggy address:
[ 25.193097][ T303] ffff88810b070700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 25.201227][ T303] ffff88810b070780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 25.209266][ T303] >ffff88810b070800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.217306][ T303] ^
[ 25.223177][ T303] ffff88810b070880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.231218][ T303] ffff88810b070900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.239254][ T303] ==================================================================
[ 25.247374][ T303] Disabling lock debugging due to kernel taint
[ 25.253732][ T303] ------------[ cut here ]------------
[ 25.257277][ T30] audit: type=1400 audit(1785427466.114:73): avc: denied { read } for pid=83 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1
[ 25.259172][ T303] refcount_t: addition on 0; use-after-free.
[ 25.259273][ T303] WARNING: CPU: 0 PID: 303 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0
[ 25.296420][ T303] Modules linked in:
[ 25.300327][ T303] CPU: 0 PID: 303 Comm: syz-executor360 Tainted: G B syzkaller #0
[ 25.309503][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 25.319579][ T303] RIP: 0010:refcount_warn_saturate+0x104/0x1a0
[ 25.325743][ T303] Code: 04 01 48 c7 c7 80 47 63 85 e8 c8 47 5a 02 0f 0b eb df e8 5f 80 19 ff c6 05 1b ea 95 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 <0f> 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63
[ 25.345365][ T303] RSP: 0018:ffffc900009979f8 EFLAGS: 00010246
[ 25.351470][ T303] RAX: ec8ae682d7094700 RBX: 0000000000000002 RCX: ffff88811b8862c0
[ 25.359434][ T303] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 25.367416][ T303] RBP: ffffc90000997a08 R08: 0000000000000003 R09: 0000000000000004
[ 25.375393][ T303] R10: dffffc0000000000 R11: fffff52000132ef0 R12: 1ffff1102160b30e
[ 25.383362][ T303] R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000000
[ 25.391336][ T303] FS: 0000555566f423c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 25.400262][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 25.406858][ T303] CR2: 00007f90f3de76e8 CR3: 00000001244c9000 CR4: 00000000003506b0
[ 25.414925][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 25.422910][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 25.430872][ T303] Call Trace:
[ 25.434183][ T303]
[ 25.437118][ T303] kobject_get+0xfb/0x120
[ 25.441466][ T303] device_add+0x2f0/0xe90
[ 25.445919][ T303] device_create+0x26c/0x300
[ 25.450497][ T303] ? root_device_unregister+0x80/0x80
[ 25.456054][ T303] create_function_device+0x60/0x70
[ 25.461289][ T303] f_midi_alloc_inst+0x1a8/0x380
[ 25.466211][ T303] usb_get_function_instance+0xe2/0x2f0
[ 25.471775][ T303] function_make+0x118/0x350
[ 25.476357][ T303] ? gadget_dev_desc_max_speed_store+0x240/0x240
[ 25.482690][ T303] ? wait_for_completion_killable_timeout+0x10/0x10
[ 25.489286][ T303] ? __kmalloc+0x13d/0x2c0
[ 25.493730][ T303] ? configfs_mkdir+0x444/0x9c0
[ 25.498578][ T303] configfs_mkdir+0x50a/0x9c0
[ 25.503262][ T303] vfs_mkdir+0x38b/0x590
[ 25.507498][ T303] do_mkdirat+0x174/0x4d0
[ 25.511831][ T303] __x64_sys_mkdirat+0x89/0xa0
[ 25.516599][ T303] x64_sys_call+0x37e/0x9a0
[ 25.521078][ T303] do_syscall_64+0x4c/0xa0
[ 25.525517][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.530185][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.534875][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 25.540761][ T303] RIP: 0033:0x7fbe667cdc79
[ 25.545188][ T303] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
[ 25.564828][ T303] RSP: 002b:00007ffd10a8fa78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 25.573250][ T303] RAX: ffffffffffffffda RBX: 0000200000000100 RCX: 00007fbe667cdc79
[ 25.581251][ T303] RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
[ 25.589210][ T303] RBP: 0032672f74656764 R08: 0000000000000000 R09: 0000000000000000
[ 25.597200][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd10a8fbb8
[ 25.605175][ T303] R13: 0000000000000002 R14: 00007fbe6685eca0 R15: 0000000000000002
[ 25.613159][ T303]
[ 25.616187][ T303] ---[ end trace e491d44357f168b1 ]---
[ 25.621661][ T303] ------------[ cut here ]------------
[ 25.627115][ T303] refcount_t: saturated; leaking memory.
[ 25.632846][ T303] WARNING: CPU: 0 PID: 303 at lib/refcount.c:22 refcount_warn_saturate+0x158/0x1a0
[ 25.642410][ T303] Modules linked in:
[ 25.646290][ T303] CPU: 0 PID: 303 Comm: syz-executor360 Tainted: G B W syzkaller #0
[ 25.655424][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 25.665492][ T303] RIP: 0010:refcount_warn_saturate+0x158/0x1a0
[ 25.671657][ T303] Code: 04 01 48 c7 c7 60 46 63 85 e8 74 47 5a 02 0f 0b eb 8b e8 0b 80 19 ff c6 05 c6 e9 95 04 01 48 c7 c7 60 46 63 85 e8 58 47 5a 02 <0f> 0b e9 6c ff ff ff e8 ec 7f 19 ff c6 05 ab e9 95 04 01 48 c7 c7
[ 25.691271][ T303] RSP: 0018:ffffc900009978b8 EFLAGS: 00010246
[ 25.697318][ T303] RAX: ec8ae682d7094700 RBX: 0000000000000001 RCX: ffff88811b8862c0
[ 25.705312][ T303] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 25.713309][ T303] RBP: ffffc900009978c8 R08: ffffc90000997327 R09: 1ffff92000132e64
[ 25.721297][ T303] R10: dffffc0000000000 R11: fffff52000132e65 R12: 00000000c0000000
[ 25.729260][ T303] R13: ffff88810b059818 R14: 0000000000000001 R15: ffff88810b070838
[ 25.737246][ T303] FS: 0000555566f423c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 25.746205][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 25.752813][ T303] CR2: 00007f90f3de76e8 CR3: 00000001244c9000 CR4: 00000000003506b0
[ 25.760782][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 25.769154][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 25.777161][ T303] Call Trace:
[ 25.780435][ T303]
[ 25.783368][ T303] kobject_add_internal+0xc44/0xde0
[ 25.788562][ T303] ? kobject_set_name_vargs+0x4c/0x110
[ 25.794041][ T303] kobject_add+0x165/0x230
[ 25.798458][ T303] ? kobject_init+0x1d0/0x1d0
[ 25.803153][ T303] ? get_device_parent+0x12e/0x410
[ 25.808263][ T303] device_add+0x398/0xe90
[ 25.812618][ T303] device_create+0x26c/0x300
[ 25.817233][ T303] ? root_device_unregister+0x80/0x80
[ 25.822873][ T303] create_function_device+0x60/0x70
[ 25.828197][ T303] f_midi_alloc_inst+0x1a8/0x380
[ 25.833171][ T303] usb_get_function_instance+0xe2/0x2f0
[ 25.838728][ T303] function_make+0x118/0x350
[ 25.843352][ T303] ? gadget_dev_desc_max_speed_store+0x240/0x240
[ 25.849675][ T303] ? wait_for_completion_killable_timeout+0x10/0x10
[ 25.856302][ T303] ? __kmalloc+0x13d/0x2c0
[ 25.860715][ T303] ? configfs_mkdir+0x444/0x9c0
[ 25.865592][ T303] configfs_mkdir+0x50a/0x9c0
[ 25.870260][ T303] vfs_mkdir+0x38b/0x590
[ 25.874526][ T303] do_mkdirat+0x174/0x4d0
[ 25.878845][ T303] __x64_sys_mkdirat+0x89/0xa0
[ 25.883617][ T303] x64_sys_call+0x37e/0x9a0
[ 25.888116][ T303] do_syscall_64+0x4c/0xa0
[ 25.892561][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.897250][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.901929][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 25.907809][ T303] RIP: 0033:0x7fbe667cdc79
[ 25.912227][ T303] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
[ 25.932005][ T303] RSP: 002b:00007ffd10a8fa78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 25.940416][ T303] RAX: ffffffffffffffda RBX: 0000200000000100 RCX: 00007fbe667cdc79
[ 25.948420][ T303] RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
[ 25.956443][ T303] RBP: 0032672f74656764 R08: 0000000000000000 R09: 0000000000000000
[ 25.964445][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd10a8fbb8
[ 25.972428][ T303] R13: 0000000000000002 R14: 00007fbe6685eca0 R15: 0000000000000002
[ 25.980385][ T303]
[ 25.983401][ T303] ---[ end trace e491d44357f168b2 ]---
[ 25.988877][ T303] ------------[ cut here ]------------
[ 25.994365][ T303] refcount_t: underflow; use-after-free.
[ 26.000035][ T303] WARNING: CPU: 0 PID: 303 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0
[ 26.009362][ T303] Modules linked in:
[ 26.013269][ T303] CPU: 0 PID: 303 Comm: syz-executor360 Tainted: G B W syzkaller #0
[ 26.022377][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 26.032460][ T303] RIP: 0010:refcount_warn_saturate+0x120/0x1a0
[ 26.038593][ T303] Code: 04 01 48 c7 c7 c0 46 63 85 e8 ac 47 5a 02 0f 0b eb c3 e8 43 80 19 ff c6 05 00 ea 95 04 01 48 c7 c7 20 47 63 85 e8 90 47 5a 02 <0f> 0b eb a7 e8 27 80 19 ff c6 05 e1 e9 95 04 01 48 c7 c7 60 46 63
[ 26.058229][ T303] RSP: 0018:ffffc90000997880 EFLAGS: 00010246
[ 26.064301][ T303] RAX: ec8ae682d7094700 RBX: 0000000000000003 RCX: ffff88811b8862c0
[ 26.072294][ T303] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 26.080261][ T303] RBP: ffffc90000997890 R08: ffff8881f7032f3f R09: 1ffff1103ee065e7
[ 26.088260][ T303] R10: dffffc0000000000 R11: ffffed103ee065e8 R12: 00000000c0000000
[ 26.096260][ T303] R13: ffff88810b07083c R14: 0000000000000003 R15: ffff88810b070838
[ 26.104259][ T303] FS: 0000555566f423c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 26.113237][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 26.119820][ T303] CR2: 00007f90f3de76e8 CR3: 00000001244c9000 CR4: 00000000003506b0
[ 26.127811][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 26.135817][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 26.143799][ T303] Call Trace:
[ 26.147116][ T303]
[ 26.150197][ T303] kobject_put+0x231/0x270
[ 26.154652][ T303] kobject_add_internal+0xb52/0xde0
[ 26.159855][ T303] kobject_add+0x165/0x230
[ 26.164314][ T303] ? kobject_init+0x1d0/0x1d0
[ 26.169083][ T303] ? get_device_parent+0x12e/0x410
[ 26.174227][ T303] device_add+0x398/0xe90
[ 26.178556][ T303] device_create+0x26c/0x300
[ 26.183159][ T303] ? root_device_unregister+0x80/0x80
[ 26.188559][ T303] create_function_device+0x60/0x70
[ 26.193773][ T303] f_midi_alloc_inst+0x1a8/0x380
[ 26.198706][ T303] usb_get_function_instance+0xe2/0x2f0
[ 26.204257][ T303] function_make+0x118/0x350
[ 26.208853][ T303] ? gadget_dev_desc_max_speed_store+0x240/0x240
[ 26.215185][ T303] ? wait_for_completion_killable_timeout+0x10/0x10
[ 26.221794][ T303] ? __kmalloc+0x13d/0x2c0
[ 26.226197][ T303] ? configfs_mkdir+0x444/0x9c0
[ 26.231021][ T303] configfs_mkdir+0x50a/0x9c0
[ 26.235705][ T303] vfs_mkdir+0x38b/0x590
[ 26.239935][ T303] do_mkdirat+0x174/0x4d0
[ 26.244268][ T303] __x64_sys_mkdirat+0x89/0xa0
[ 26.249059][ T303] x64_sys_call+0x37e/0x9a0
[ 26.253590][ T303] do_syscall_64+0x4c/0xa0
[ 26.258003][ T303] ? clear_bhb_loop+0x50/0xa0
[ 26.262682][ T303] ? clear_bhb_loop+0x50/0xa0
[ 26.267347][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 26.273280][ T303] RIP: 0033:0x7fbe667cdc79
[ 26.277682][ T303] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
[ 26.297322][ T303] RSP: 002b:00007ffd10a8fa78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 26.305747][ T303] RAX: ffffffffffffffda RBX: 0000200000000100 RCX: 00007fbe667cdc79
[ 26.313742][ T303] RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
[ 26.321741][ T303] RBP: 0032672f74656764 R08: 0000000000000000 R09: 0000000000000000
[ 26.329691][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd10a8fbb8
mkdirat(AT_FDCWD, "./config/usb_gadget/g1/functions/midi.usb0", 0777) = -1 ENODEV (No such device)
exit_group(0) = ?
+++ exited with 0 +++
[ 26.337676][ T303