general protection fault in dummy_udc

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
android-5-15	general protection fault in dummy_udc_stop	2	3	2d16h	10d	0/2	premoderation: reported on 2026/07/30 11:35
android-6-12	general protection fault in dummy_udc_stop	2	2	8d03h	14d	0/1	premoderation: reported on 2026/07/26 08:20
android-6-1	general protection fault in dummy_udc_stop	2	1	7d11h	7d11h	0/2	premoderation: reported on 2026/08/02 20:29
upstream	general protection fault in dummy_udc_stop usb prio:low	8	8	2d04h	8d08h	0/29	upstream: reported on 2026/08/02 00:01

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 7814 Comm: syz.9.2060 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:dummy_udc_stop+0x7e/0x330 drivers/usb/gadget/udc/dummy_hcd.c:1021 Code: 4d 8d bc c7 f0 04 00 00 4c 89 f8 48 c1 e8 03 80 3c 18 00 49 89 de 74 08 4c 89 ff e8 cc 5e 92 fe 49 8b 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 b3 5e 92 fe 48 8b 1b 48 89 df e8 RSP: 0018:ffffc90001007970 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: ffff88810cdf2780 RSI: 0000000000000003 RDI: 0000000000000005 RBP: ffffc900010079c8 R08: ffffc90001007967 R09: 1ffff92000200f2c R10: dffffc0000000000 R11: fffff52000200f2d R12: ffff88810b854c90 R13: ffffffff85583248 R14: dffffc0000000000 R15: ffff88810b855180 FS: 00007fd58b4756c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c248025 CR3: 00000001146a6000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: usb_gadget_udc_stop_locked drivers/usb/gadget/udc/core.c:1197 [inline] usb_gadget_remove_driver+0x20a/0x330 drivers/usb/gadget/udc/core.c:1501 usb_del_gadget+0x180/0x2a0 drivers/usb/gadget/udc/core.c:1533 usb_del_gadget_udc+0x15/0x30 drivers/usb/gadget/udc/core.c:1554 dummy_udc_remove+0x58/0x60 drivers/usb/gadget/udc/dummy_hcd.c:1110 platform_drv_remove+0x69/0x90 drivers/base/platform.c:787 __device_release_driver drivers/base/dd.c:-1 [inline] device_release_driver_internal+0x531/0x7c0 drivers/base/dd.c:1221 device_driver_detach+0x3b/0x40 drivers/base/dd.c:1257 unbind_store+0x2e5/0x300 drivers/base/bus.c:193 drv_attr_store+0x79/0xa0 drivers/base/bus.c:77 sysfs_kf_write+0x129/0x150 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x2bd/0x400 fs/kernfs/file.c:296 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 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fd58ca1be99 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 RSP: 002b:00007fd58b475028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd58cca3fa0 RCX: 00007fd58ca1be99 RDX: 000000000000000b RSI: 0000200000000400 RDI: 0000000000000003 RBP: 00007fd58cab1eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd58cca4038 R14: 00007fd58cca3fa0 R15: 00007fff3f75ed28 Modules linked in: ---[ end trace a0a076374b1be7fd ]--- RIP: 0010:dummy_udc_stop+0x7e/0x330 drivers/usb/gadget/udc/dummy_hcd.c:1021 Code: 4d 8d bc c7 f0 04 00 00 4c 89 f8 48 c1 e8 03 80 3c 18 00 49 89 de 74 08 4c 89 ff e8 cc 5e 92 fe 49 8b 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 b3 5e 92 fe 48 8b 1b 48 89 df e8 RSP: 0018:ffffc90001007970 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: ffff88810cdf2780 RSI: 0000000000000003 RDI: 0000000000000005 RBP: ffffc900010079c8 R08: ffffc90001007967 R09: 1ffff92000200f2c R10: dffffc0000000000 R11: fffff52000200f2d R12: ffff88810b854c90 R13: ffffffff85583248 R14: dffffc0000000000 R15: ffff88810b855180 FS: 00007fd58b4756c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc3dbc84000 CR3: 00000001146a6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4d 8d bc c7 f0 04 00 lea 0x4f0(%r15,%rax,8),%r15 7: 00 8: 4c 89 f8 mov %r15,%rax b: 48 c1 e8 03 shr $0x3,%rax f: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 13: 49 89 de mov %rbx,%r14 16: 74 08 je 0x20 18: 4c 89 ff mov %r15,%rdi 1b: e8 cc 5e 92 fe call 0xfe925eec 20: 49 8b 1f mov (%r15),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 b3 5e 92 fe call 0xfe925eec 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 89 df mov %rbx,%rdi 3f: e8 .byte 0xe8

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/07/25 11:22	android13-5.10-lts	50b3a256e550	492bab15	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-android-5-10	general protection fault in dummy_udc_stop

Crashes (1):

Assets (help?)