memory leak in try_get_usb_function

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
9087164f	patching		🏃	memory leak in try_get_usb_function_instance	2026/07/30 14:12	2026/07/30 14:12		c87b8ba9
3e90f771	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	memory leak in try_get_usb_function_instance	2026/07/27 00:34	2026/07/27 00:34	2026/07/27 00:42	492bab15

Title	Replies (including bot)	Last reply
[PATCH] usb: gadget: midi2: remove default configfs groups on teardown	1 (1)	2026/07/30 13:58
[syzbot] [usb?] memory leak in try_get_usb_function_instance	0 (3)	2026/07/30 12:59

Title

Replies (including bot)

Last reply

[PATCH] usb: gadget: midi2: remove default configfs groups on teardown

1 (1)

2026/07/30 13:58

[syzbot] [usb?] memory leak in try_get_usb_function_instance

0 (3)

2026/07/30 12:59

Created	Duration	User	Patch	Repo	Result
2026/07/30 12:59	31m	joshua.crofts1@gmail.com	patch	upstream	OK log
2026/07/30 12:42	14m	joshua.crofts1@gmail.com	patch	upstream	error

Created

Duration

User

Patch

Repo

Result

2026/07/30 12:59

31m

joshua.crofts1@gmail.com

patch

upstream

OK log

2026/07/30 12:42

14m

joshua.crofts1@gmail.com

patch

upstream

error

2026/07/26 12:12:48 executed programs: 5 BUG: memory leak unreferenced object 0xffff888112a69c00 (size 512): comm "syz.0.19", pid 5954, jiffies 4294946869 hex dump (first 32 bytes): 08 9c a6 12 81 88 ff ff 65 70 2e 30 00 00 00 00 ........ep.0.... 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 ................ backtrace (crc 56e62c00): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] f_midi2_ep_opts_create drivers/usb/gadget/function/f_midi2.c:2504 [inline] f_midi2_alloc_inst+0xa0/0x250 drivers/usb/gadget/function/f_midi2.c:2666 try_get_usb_function_instance+0xb8/0x100 drivers/usb/gadget/functions.c:28 usb_get_function_instance+0x16/0x70 drivers/usb/gadget/functions.c:44 function_make+0xf5/0x240 drivers/usb/gadget/configfs.c:626 configfs_mkdir+0x2e9/0x6f0 fs/configfs/dir.c:1360 vfs_mkdir+0x16c/0x3a0 fs/namei.c:5276 filename_mkdirat+0x27c/0x300 fs/namei.c:5309 __do_sys_mkdirat fs/namei.c:5330 [inline] __se_sys_mkdirat fs/namei.c:5327 [inline] __x64_sys_mkdirat+0x39/0x60 fs/namei.c:5327 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881105a3f00 (size 256): comm "syz.0.19", pid 5954, jiffies 4294946869 hex dump (first 32 bytes): 08 3f 5a 10 81 88 ff ff 62 6c 6f 63 6b 2e 30 00 .?Z.....block.0. 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 ................ backtrace (crc f7f284e3): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] f_midi2_block_opts_create+0x82/0x120 drivers/usb/gadget/function/f_midi2.c:2342 f_midi2_alloc_inst+0xe9/0x250 drivers/usb/gadget/function/f_midi2.c:2673 try_get_usb_function_instance+0xb8/0x100 drivers/usb/gadget/functions.c:28 usb_get_function_instance+0x16/0x70 drivers/usb/gadget/functions.c:44 function_make+0xf5/0x240 drivers/usb/gadget/configfs.c:626 configfs_mkdir+0x2e9/0x6f0 fs/configfs/dir.c:1360 vfs_mkdir+0x16c/0x3a0 fs/namei.c:5276 filename_mkdirat+0x27c/0x300 fs/namei.c:5309 __do_sys_mkdirat fs/namei.c:5330 [inline] __se_sys_mkdirat fs/namei.c:5327 [inline] __x64_sys_mkdirat+0x39/0x60 fs/namei.c:5327 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/07/26 12:13	upstream	3dab139d4795	492bab15	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-gce-leak	memory leak in try_get_usb_function_instance

Crashes (1):

Assets (help?)