general protection fault in dummy_queue

Status: upstream: reported on 2026/07/28 13:42
Subsystems: usb
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+ccaeedf06fe422068ae0@syzkaller.appspotmail.com
First crash: 6d22h, last: 1h23m
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
f88d16d0 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ general protection fault in dummy_queue 2026/07/26 02:20 2026/07/26 02:20 2026/07/26 02:28 492bab15

			
		
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [usb?] general protection fault in dummy_queue 0 (1) 2026/07/28 13:42
Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 general protection fault in dummy_queue 2 8 6h32m 6d10h 0/2 upstream: reported on 2026/07/25 01:05
android-5-10 general protection fault in dummy_queue 2 5 2d10h 6d22h 0/2 premoderation: reported on 2026/07/24 13:21
android-6-1 general protection fault in dummy_queue 2 2 4d07h 6d17h 0/2 premoderation: reported on 2026/07/24 18:37
android-6-12 general protection fault in dummy_queue 2 7 22h21m 3d21h 0/1 premoderation: reported on 2026/07/27 14:26
android-5-15 general protection fault in dummy_queue 2 7 3h47m 6d02h 0/2 premoderation: reported on 2026/07/25 09:31
linux-6.1 BUG: unable to handle kernel paging request in dummy_queue 8 2 5d22h 6d13h 0/3 upstream: reported on 2026/07/24 22:29

Sample crash report:
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 1 UID: 0 PID: 1313 Comm: aoe_tx0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:dummy_queue+0x1ae/0x900 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 eb 44 7d fa 4d 8b 24 24 49 83 c4 60 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 f0 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc90005ef76e0 EFLAGS: 00010216
RAX: 000000000000000c RBX: ffff88807b911410 RCX: dffffc0000000000
RDX: ffff8880294abe00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff88807b911400 R08: ffffffff90579937 R09: 1ffffffff20af326
R10: dffffc0000000000 R11: ffffffff87b76550 R12: 0000000000000060
R13: 1ffff1100f722280 R14: ffff888029c040e0 R15: ffff888029c04c00
FS:  0000000000000000(0000) GS:ffff88812504d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2d197556c8 CR3: 000000007d5a5000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 usb_ep_queue+0xf1/0x3c0 drivers/usb/gadget/udc/core.c:305
 eth_start_xmit+0x9a7/0x1080 drivers/usb/gadget/function/u_ether.c:579
 __netdev_start_xmit include/linux/netdevice.h:5400 [inline]
 netdev_start_xmit include/linux/netdevice.h:5409 [inline]
 xmit_one net/core/dev.c:3889 [inline]
 dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3905
 sch_direct_xmit+0x257/0x4c0 net/sched/sch_generic.c:372
 __dev_xmit_skb net/core/dev.c:4214 [inline]
 __dev_queue_xmit+0x177f/0x3820 net/core/dev.c:4836
 dev_queue_xmit include/linux/netdevice.h:3446 [inline]
 tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1ed/0x420 drivers/block/aoe/aoecmd.c:1241
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_queue+0x1ae/0x900 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 eb 44 7d fa 4d 8b 24 24 49 83 c4 60 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 f0 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc90005ef76e0 EFLAGS: 00010216
RAX: 000000000000000c RBX: ffff88807b911410 RCX: dffffc0000000000
RDX: ffff8880294abe00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff88807b911400 R08: ffffffff90579937 R09: 1ffffffff20af326
R10: dffffc0000000000 R11: ffffffff87b76550 R12: 0000000000000060
R13: 1ffff1100f722280 R14: ffff888029c040e0 R15: ffff888029c04c00
FS:  0000000000000000(0000) GS:ffff88812504d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2d197556c8 CR3: 000000007d5a5000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	fc                   	cld
   1:	ff                   	lcall  (bad)
   2:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
   8:	08 4c 89 e7          	or     %cl,-0x19(%rcx,%rcx,4)
   c:	e8 eb 44 7d fa       	call   0xfa7d44fc
  11:	4d 8b 24 24          	mov    (%r12),%r12
  15:	49 83 c4 60          	add    $0x60,%r12
  19:	4c 89 e0             	mov    %r12,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 f0 05 00 00    	jne    0x626
  36:	45 8b 24 24          	mov    (%r12),%r12d
  3a:	44 89 e6             	mov    %r12d,%esi
  3d:	83 e6 02             	and    $0x2,%esi

Crashes (146):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/31 00:50 upstream 3708dd948844 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/07/29 14:05 upstream fc02acf6ac0c cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/29 00:23 upstream 3b5f4b83c4ab 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/07/28 20:03 upstream 62cc90241548 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/07/28 16:33 upstream 62cc90241548 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/28 09:31 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/27 17:55 upstream f5098b6bae76 4cb2b096 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/07/27 13:24 upstream f5098b6bae76 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in dummy_queue
2026/07/27 12:49 upstream f5098b6bae76 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/27 09:27 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/27 06:19 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/27 04:12 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/27 00:38 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/26 18:20 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/26 15:58 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/26 13:24 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/26 11:53 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/07/25 23:33 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in dummy_queue
2026/07/25 19:51 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in dummy_queue
2026/07/25 12:37 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in dummy_queue
2026/07/31 10:32 upstream 8ba098e6b6ff db462e94 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/31 00:33 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/30 22:35 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/30 18:06 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/30 15:56 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/30 05:42 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 23:18 upstream fc02acf6ac0c 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 20:32 upstream fc02acf6ac0c 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 19:27 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 16:54 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 15:50 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 12:29 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 11:27 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 08:48 upstream fc02acf6ac0c 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 07:21 upstream 3b5f4b83c4ab 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 05:27 upstream 3b5f4b83c4ab 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/29 03:04 upstream 3b5f4b83c4ab 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/28 15:05 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/28 05:07 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/27 10:29 upstream f5098b6bae76 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/26 14:41 upstream 3dab139d4795 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/31 05:42 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/28 07:32 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/27 15:20 upstream f5098b6bae76 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/27 02:08 upstream 4235cb24ec1e 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/26 19:30 upstream 3dab139d4795 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/26 10:14 upstream 3dab139d4795 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/25 04:31 linux-next cc2b5f627e8c 05b26a28 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in dummy_queue
2026/07/24 13:31 linux-next cc2b5f627e8c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in dummy_queue
2026/07/29 13:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 cb1587ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/29 01:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/28 21:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/28 16:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/28 12:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/27 22:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 4cb2b096 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/26 20:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
* Struck through repros no longer work on HEAD.