general protection fault in dummy_set_selfpowered

Status: upstream: reported C repro on 2026/07/24 18:49
Reported-by: syzbot+dffe5ed79f58d9c490d3@syzkaller.appspotmail.com
First crash: 4d21h, last: 9h40m
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in dummy_set_selfpowered usb prio:low 10 syz, C error 302 34m 20h37m 0/29 upstream: reported C repro on 2026/07/28 13:53
android-6-12 general protection fault in dummy_set_selfpowered 2 syz, C 24 5h45m 4d19h 0/1 premoderation: reported C repro on 2026/07/24 15:05
android-5-15 general protection fault in dummy_set_selfpowered origin:upstream 2 syz, C 23 7h03m 4d10h 0/2 upstream: reported C repro on 2026/07/25 00:06
linux-5.15 general protection fault in dummy_set_selfpowered 2 6 2h36m 4d12h 0/3 upstream: reported on 2026/07/24 22:03
android-6-1 general protection fault in dummy_set_selfpowered 2 syz, C 13 17h46m 2d20h 0/2 upstream: reported C repro on 2026/07/26 13:33
linux-6.6 general protection fault in dummy_set_selfpowered 2 11 4h41m 4d09h 0/2 upstream: reported on 2026/07/25 01:11
linux-6.1 BUG: unable to handle kernel paging request in dummy_set_selfpowered 8 9 52m 4d12h 0/3 upstream: reported on 2026/07/24 22:26

Sample crash report:
dummy_hcd dummy_hcd.0: remove, state 4
usb usb1: USB disconnect, device number 1
dummy_hcd dummy_hcd.0: stopped
dummy_hcd dummy_hcd.0: USB bus 1 deregistered
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: 398 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:dummy_set_selfpowered+0xbc/0x150 drivers/usb/gadget/udc/dummy_hcd.c:882
Code: 94 c0 4d 8d b4 c6 f0 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0e 64 92 fe 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 f5 63 92 fe 41 be 78 11 00 00 4d
RSP: 0018:ffffc90000f079f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88811124cf00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90000f07a10 R08: ffff888100059d6f R09: 1ffff1102000b3ad
R10: dffffc0000000000 R11: ffffed102000b3ae R12: dffffc0000000000
R13: ffff8881118b4478 R14: ffff88810b81d180 R15: 0000000000000000
FS:  000055556cc0b500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001300 CR3: 0000000111841000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 usb_gadget_set_selfpowered+0x6c/0x180 drivers/usb/gadget/udc/core.c:536
 composite_dev_prepare+0x2e7/0x310 drivers/usb/gadget/composite.c:2273
 configfs_composite_bind+0xb4/0x13a0 drivers/usb/gadget/configfs.c:1336
 udc_bind_to_driver+0x24e/0x6d0 drivers/usb/gadget/udc/core.c:1573
 usb_gadget_probe_driver+0x1fc/0x380 drivers/usb/gadget/udc/core.c:1639
 gadget_dev_desc_UDC_store+0x217/0x330 drivers/usb/gadget/configfs.c:321
 flush_write_buffer fs/configfs/file.c:251 [inline]
 configfs_write_file+0x320/0x3d0 fs/configfs/file.c:283
 vfs_write+0x344/0xd70 fs/read_write.c:603
 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: 0033:0x7f74157f3e99
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:00007ffe24721168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7415a7bfa0 RCX: 00007f74157f3e99
RDX: 000000000000000b RSI: 0000200000001400 RDI: 0000000000000004
RBP: 00007f7415889eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7415a7bfac R14: 00007f7415a7bfa0 R15: 00007f7415a7bfa0
Modules linked in:
---[ end trace 24b50ac300f28f6d ]---
RIP: 0010:dummy_set_selfpowered+0xbc/0x150 drivers/usb/gadget/udc/dummy_hcd.c:882
Code: 94 c0 4d 8d b4 c6 f0 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0e 64 92 fe 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 f5 63 92 fe 41 be 78 11 00 00 4d
RSP: 0018:ffffc90000f079f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88811124cf00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90000f07a10 R08: ffff888100059d6f R09: 1ffff1102000b3ad
R10: dffffc0000000000 R11: ffffed102000b3ae R12: dffffc0000000000
R13: ffff8881118b4478 R14: ffff88810b81d180 R15: 0000000000000000
FS:  000055556cc0b500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b621ad1620 CR3: 0000000111841000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	4d 8d b4 c6 f0 04 00 	lea    0x4f0(%r14,%rax,8),%r14
   7:	00
   8:	4c 89 f0             	mov    %r14,%rax
   b:	48 c1 e8 03          	shr    $0x3,%rax
   f:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  14:	74 08                	je     0x1e
  16:	4c 89 f7             	mov    %r14,%rdi
  19:	e8 0e 64 92 fe       	call   0xfe92642c
  1e:	4d 8b 3e             	mov    (%r14),%r15
  21:	4c 89 f8             	mov    %r15,%rax
  24:	48 c1 e8 03          	shr    $0x3,%rax
* 28:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ff             	mov    %r15,%rdi
  32:	e8 f5 63 92 fe       	call   0xfe92642c
  37:	41 be 78 11 00 00    	mov    $0x1178,%r14d
  3d:	4d                   	rex.WRB

Crashes (31):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/29 00:50 android13-5.10-lts 50b3a256e550 edc8a875 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/28 11:06 android13-5.10-lts 50b3a256e550 45ae1df4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/27 03:30 android13-5.10-lts 50b3a256e550 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/26 04:29 android13-5.10-lts 50b3a256e550 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/25 22:09 android13-5.10-lts 50b3a256e550 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/25 19:09 android13-5.10-lts 50b3a256e550 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 22:47 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 21:10 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 19:37 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 18:42 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/28 19:51 android13-5.10-lts 50b3a256e550 edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/27 18:41 android13-5.10-lts 50b3a256e550 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/27 04:47 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_set_selfpowered
2026/07/27 04:30 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_set_selfpowered
2026/07/26 09:29 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_set_selfpowered
2026/07/26 03:45 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_set_selfpowered
2026/07/26 01:25 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_set_selfpowered
2026/07/25 19:04 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_set_selfpowered
2026/07/25 15:48 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_set_selfpowered
2026/07/25 12:30 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_set_selfpowered
2026/07/25 12:24 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_set_selfpowered
2026/07/25 10:12 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_set_selfpowered
2026/07/25 07:36 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_set_selfpowered
2026/07/24 22:59 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 20:41 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 16:38 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 13:21 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 13:20 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 13:20 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 13:20 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
2026/07/24 13:18 android13-5.10-lts 50b3a256e550 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dummy_set_selfpowered
* Struck through repros no longer work on HEAD.