KASAN: use-after-free Read in device_create

Status: upstream: reported C repro on 2026/08/02 20:17
Reported-by: syzbot+174ed16882d6d04ec20a@syzkaller.appspotmail.com
First crash: 18d, last: 2h46m
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 KASAN: use-after-free Read in device_create origin:downstream 19 syz, C 19 2h55m 13d 0/2 upstream: reported C repro on 2026/07/30 16:16
android-6-1 KASAN: use-after-free Read in device_create 19 7 2d20h 18d 0/2 premoderation: reported on 2026/07/25 07:17

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in kobject_get+0x113/0x120 lib/kobject.c:663
Read of size 1 at addr ffff88811ea6603c by task syz-executor269/307

CPU: 1 PID: 307 Comm: syz-executor269 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 kobject_get+0x113/0x120 lib/kobject.c:663
 get_device drivers/base/core.c:3361 [inline]
 device_add+0x331/0xc00 drivers/base/core.c:3191
 device_create_groups_vargs drivers/base/core.c:3960 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4002
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:636
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdir fs/namei.c:3836 [inline]
 __se_sys_mkdir fs/namei.c:3834 [inline]
 __x64_sys_mkdir+0x60/0x70 fs/namei.c:3834
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fbe9c391979
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
RSP: 002b:00007ffc7629d1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000200000000400 RCX: 00007fbe9c391979
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 73666769666e6f63 R08: 0000000000000009 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 6769666e6f632f2e
R13: 0000000000000002 R14: 00007ffc7629d1f0 R15: 00007ffc7629d1e0

Allocated by task 300:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 kmem_cache_alloc_trace+0x179/0x2e0 mm/slub.c:2979
 kmalloc include/linux/slab.h:555 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 device_create_groups_vargs drivers/base/core.c:3942 [inline]
 device_create+0x13a/0x300 drivers/base/core.c:4002
 android_device_create drivers/usb/gadget/configfs.c:1789 [inline]
 gadgets_make+0x816/0xa70 drivers/usb/gadget/configfs.c:1886
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdirat fs/namei.c:3831 [inline]
 __se_sys_mkdirat fs/namei.c:3829 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3829
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 300:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 device_create_release+0x15/0x20 drivers/base/core.c:3927
 device_release+0x96/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x18a/0x270 lib/kobject.c:761
 put_device drivers/base/core.c:3373 [inline]
 device_unregister drivers/base/core.c:3498 [inline]
 device_destroy+0xb4/0xf0 drivers/base/core.c:4068
 android_device_destroy drivers/usb/gadget/configfs.c:1821 [inline]
 gadgets_drop+0xa0/0xd0 drivers/usb/gadget/configfs.c:1902
 client_drop_item fs/configfs/dir.c:959 [inline]
 configfs_rmdir+0x871/0x960 fs/configfs/dir.c:1576
 vfs_rmdir+0x1ab/0x3c0 fs/namei.c:3860
 do_rmdir+0x232/0x630 fs/namei.c:3920
 __do_sys_rmdir fs/namei.c:3938 [inline]
 __se_sys_rmdir fs/namei.c:3936 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:3936
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff88811ea66000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 60 bytes inside of
 1024-byte region [ffff88811ea66000, ffff88811ea66400)
The buggy address belongs to the page:
page:ffffea00047a9800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ea60
head:ffffea00047a9800 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 294, ts 42803755178, free_ts 42802499849
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb_fclone include/linux/skbuff.h:1176 [inline]
 sk_stream_alloc_skb+0x216/0xb70 net/ipv4/tcp.c:887
 tcp_sendmsg_locked+0xc92/0x34e0 net/ipv4/tcp.c:1295
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1447
 inet_sendmsg+0xa5/0xc0 net/ipv4/af_inet.c:830
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 sock_write_iter+0x2a6/0x3a0 net/socket.c:1019
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x770/0xd70 fs/read_write.c:605
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_compound_page+0x73/0x90 mm/page_alloc.c:710
 destroy_compound_page include/linux/mm.h:970 [inline]
 __put_compound_page+0x77/0xb0 mm/swap.c:117
 __put_page+0xbd/0xe0 mm/swap.c:133
 put_page include/linux/mm.h:1268 [inline]
 page_to_skb+0x3d9/0x930 drivers/net/virtio_net.c:473
 receive_mergeable drivers/net/virtio_net.c:1049 [inline]
 receive_buf+0xc03/0x46a0 drivers/net/virtio_net.c:1159
 virtnet_receive drivers/net/virtio_net.c:1451 [inline]
 virtnet_poll+0x3c9/0xef0 drivers/net/virtio_net.c:1560
 napi_poll net/core/dev.c:6885 [inline]
 net_rx_action+0x48d/0xed0 net/core/dev.c:6955
 __do_softirq+0x255/0x563 kernel/softirq.c:309

Memory state around the buggy address:
 ffff88811ea65f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811ea65f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811ea66000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88811ea66080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811ea66100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 307 at lib/refcount.c:25 refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 307 Comm: syz-executor269 Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x104/0x1a0 lib/refcount.c:25
Code: 04 01 48 c7 c7 20 4c 40 85 e8 38 ee 3a 02 0f 0b eb df e8 8f a8 26 ff c6 05 4c 94 82 04 01 48 c7 c7 60 4b 40 85 e8 1c ee 3a 02 <0f> 0b eb c3 e8 73 a8 26 ff c6 05 31 94 82 04 01 48 c7 c7 c0 4b 40
RSP: 0018:ffffc90000b27950 EFLAGS: 00010246
RAX: d02332538f169b00 RBX: 0000000000000002 RCX: ffff8881075e13c0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000b27960 R08: ffff8881f7127453 R09: 1ffff1103ee24e8a
R10: dffffc0000000000 R11: ffffed103ee24e8b R12: 0000000000000000
R13: ffff88810b0c7068 R14: 0000000000000002 R15: 0000000000000000
FS:  000055557f3c93c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582adb6f410 CR3: 000000010aea4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get+0xfb/0x120 lib/kobject.c:667
 get_device drivers/base/core.c:3361 [inline]
 device_add+0x331/0xc00 drivers/base/core.c:3191
 device_create_groups_vargs drivers/base/core.c:3960 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4002
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:636
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdir fs/namei.c:3836 [inline]
 __se_sys_mkdir fs/namei.c:3834 [inline]
 __x64_sys_mkdir+0x60/0x70 fs/namei.c:3834
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fbe9c391979
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
RSP: 002b:00007ffc7629d1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000200000000400 RCX: 00007fbe9c391979
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 73666769666e6f63 R08: 0000000000000009 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 6769666e6f632f2e
R13: 0000000000000002 R14: 00007ffc7629d1f0 R15: 00007ffc7629d1e0
---[ end trace cdb9a6ab2b96035f ]---
------------[ cut here ]------------
refcount_t: saturated; leaking memory.
WARNING: CPU: 1 PID: 307 at lib/refcount.c:22 refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Modules linked in:
CPU: 1 PID: 307 Comm: syz-executor269 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x158/0x1a0 lib/refcount.c:22
Code: 04 01 48 c7 c7 e0 4a 40 85 e8 e4 ed 3a 02 0f 0b eb 8b e8 3b a8 26 ff c6 05 f7 93 82 04 01 48 c7 c7 e0 4a 40 85 e8 c8 ed 3a 02 <0f> 0b e9 6c ff ff ff e8 1c a8 26 ff c6 05 dc 93 82 04 01 48 c7 c7
RSP: 0018:ffffc90000b27818 EFLAGS: 00010246
RAX: d02332538f169b00 RBX: 0000000000000001 RCX: ffff8881075e13c0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000b27828 R08: ffff8881f7152fbf R09: 1ffff1103ee2a5f7
R10: dffffc0000000000 R11: ffffed103ee2a5f8 R12: 00000000c0000000
R13: ffff88810b0c7018 R14: 0000000000000001 R15: ffff88811ea66038
FS:  000055557f3c93c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582adb6f410 CR3: 000000010aea4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 kref_get include/linux/kref.h:45 [inline]
 kobject_get lib/kobject.c:667 [inline]
 kobject_add_internal+0xc44/0xde0 lib/kobject.c:248
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x3d8/0xc00 drivers/base/core.c:3206
 device_create_groups_vargs drivers/base/core.c:3960 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4002
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:636
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdir fs/namei.c:3836 [inline]
 __se_sys_mkdir fs/namei.c:3834 [inline]
 __x64_sys_mkdir+0x60/0x70 fs/namei.c:3834
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fbe9c391979
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
RSP: 002b:00007ffc7629d1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000200000000400 RCX: 00007fbe9c391979
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 73666769666e6f63 R08: 0000000000000009 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 6769666e6f632f2e
R13: 0000000000000002 R14: 00007ffc7629d1f0 R15: 00007ffc7629d1e0
---[ end trace cdb9a6ab2b960360 ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 307 at lib/refcount.c:28 refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 307 Comm: syz-executor269 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:refcount_warn_saturate+0x120/0x1a0 lib/refcount.c:28
Code: 04 01 48 c7 c7 60 4b 40 85 e8 1c ee 3a 02 0f 0b eb c3 e8 73 a8 26 ff c6 05 31 94 82 04 01 48 c7 c7 c0 4b 40 85 e8 00 ee 3a 02 <0f> 0b eb a7 e8 57 a8 26 ff c6 05 12 94 82 04 01 48 c7 c7 e0 4a 40
RSP: 0018:ffffc90000b277e0 EFLAGS: 00010246
RAX: d02332538f169b00 RBX: 0000000000000003 RCX: ffff8881075e13c0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000b277f0 R08: ffffc90000b27167 R09: fffff52000164e60
R10: dffffc0000000000 R11: fffff52000164e2d R12: 00000000c0000000
R13: ffff88811ea6603c R14: 0000000000000003 R15: ffff88811ea66038
FS:  000055557f3c93c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582adb6f410 CR3: 000000010aea4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 kref_put include/linux/kref.h:64 [inline]
 kobject_put+0x231/0x270 lib/kobject.c:761
 kobject_add_internal+0xb52/0xde0 lib/kobject.c:266
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 device_add+0x3d8/0xc00 drivers/base/core.c:3206
 device_create_groups_vargs drivers/base/core.c:3960 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4002
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:636
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdir fs/namei.c:3836 [inline]
 __se_sys_mkdir fs/namei.c:3834 [inline]
 __x64_sys_mkdir+0x60/0x70 fs/namei.c:3834
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fbe9c391979
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
RSP: 002b:00007ffc7629d1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000200000000400 RCX: 00007fbe9c391979
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000800
RBP: 73666769666e6f63 R08: 0000000000000009 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 6769666e6f632f2e
R13: 0000000000000002 R14: 00007ffc7629d1f0 R15: 00007ffc7629d1e0
---[ end trace cdb9a6ab2b960361 ]---
kobject_add_internal failed for f_midi (error: -2 parent: )

Crashes (44):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/08 18:51 android13-5.10-lts 447db0046f21 5d63f80b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 13:57 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 20:06 android13-5.10-lts 50b3a256e550 e611ffe1 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/12 16:03 android13-5.10-lts 8e2d2cc88387 f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/12 12:31 android13-5.10-lts 8e2d2cc88387 f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/10 10:43 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/09 06:08 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/08 03:29 android13-5.10-lts 447db0046f21 e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 14:14 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 10:59 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 09:15 android13-5.10-lts 9fe41ae8657d c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 06:04 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 03:33 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 01:50 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 01:46 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/07 00:55 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/06 17:32 android13-5.10-lts 0f73d4924a74 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/06 02:11 android13-5.10-lts 0f73d4924a74 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/06 01:25 android13-5.10-lts 0f73d4924a74 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/05 03:07 android13-5.10-lts 0f73d4924a74 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/04 02:36 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/04 02:21 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/03 20:44 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/03 16:17 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/03 13:37 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/03 13:37 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 15:10 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 13:00 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 02:29 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 02:29 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 02:29 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 01:46 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/02 01:45 android13-5.10-lts 50b3a256e550 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/01 00:46 android13-5.10-lts 50b3a256e550 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/01 00:45 android13-5.10-lts 50b3a256e550 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/01 00:45 android13-5.10-lts 50b3a256e550 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/07/30 03:16 android13-5.10-lts 50b3a256e550 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/07/26 18:14 android13-5.10-lts 50b3a256e550 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/07/26 16:42 android13-5.10-lts 50b3a256e550 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/07/26 14:53 android13-5.10-lts 50b3a256e550 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/07/25 01:58 android13-5.10-lts 50b3a256e550 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Read in device_create
2026/08/11 23:02 android13-5.10-lts dce28bf8c73c 71790083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in device_create
2026/08/06 20:14 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in device_create
2026/07/25 06:59 android13-5.10-lts 50b3a256e550 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in device_create
* Struck through repros no longer work on HEAD.