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: 13d, last: 10h13m
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
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 (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 general protection fault in dummy_queue 2 1 19h10m 19h09m 0/3 upstream: reported on 2026/08/06 16:53
linux-6.6 general protection fault in dummy_queue 2 10 3d07h 13d 0/2 upstream: reported on 2026/07/25 01:05
android-5-10 general protection fault in dummy_queue 2 11 4d00h 13d 0/2 premoderation: reported on 2026/07/24 13:21
android-6-1 general protection fault in dummy_queue 2 2 11d 13d 0/2 premoderation: reported on 2026/07/24 18:37
linux-6.1 BUG: unable to handle kernel paging request in dummy_queue 8 3 11h16m 13d 0/3 upstream: reported on 2026/07/24 22:29
android-6-12 general protection fault in dummy_queue 2 10 1h33m 10d 0/1 premoderation: reported on 2026/07/27 14:26
android-5-15 general protection fault in dummy_queue 2 7 7d03h 13d 0/2 premoderation: reported on 2026/07/25 09:31

Sample crash report:
ieee802154 phy0 wpan0: 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: 0 UID: 0 PID: 1303 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+0x1ba/0xb00 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: 00 49 83 bc 24 c8 05 00 00 00 0f 84 a6 07 00 00 e8 fb b4 3b fa 49 8d 7f 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4f 07 00 00 45 8b 7f 60 31 ff
RSP: 0018:ffffc90005b27868 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88803678ab10 RCX: ffffffff87ce9f6f
RDX: 000000000000000c RSI: ffffffff87ce9fe5 RDI: 0000000000000060
RBP: ffff8880216c8248 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 000000000000757b R12: ffff8880216c8c00
R13: ffff88803678ab00 R14: ffff8880216c8240 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123ded000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3f7ff7 CR3: 0000000021fb4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 usb_ep_queue+0xfa/0x3c0 drivers/usb/gadget/udc/core.c:305
 eth_start_xmit+0x684/0x1390 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+0x121/0x760 net/core/dev.c:3905
 sch_direct_xmit+0x1b2/0xc70 net/sched/sch_generic.c:372
 __dev_xmit_skb net/core/dev.c:4214 [inline]
 __dev_queue_xmit+0x27ac/0x4970 net/core/dev.c:4836
 dev_queue_xmit include/linux/netdevice.h:3446 [inline]
 tx+0xc4/0x130 drivers/block/aoe/aoenet.c:62
 kthread+0x1d8/0x3c0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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+0x1ba/0xb00 drivers/usb/gadget/udc/dummy_hcd.c:737
Code: 00 49 83 bc 24 c8 05 00 00 00 0f 84 a6 07 00 00 e8 fb b4 3b fa 49 8d 7f 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4f 07 00 00 45 8b 7f 60 31 ff
RSP: 0018:ffffc90005b27868 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88803678ab10 RCX: ffffffff87ce9f6f
RDX: 000000000000000c RSI: ffffffff87ce9fe5 RDI: 0000000000000060
RBP: ffff8880216c8248 R08: 0000000000000005 R09: 0000000000000005
R10: 0000000000000003 R11: 000000000000757b R12: ffff8880216c8c00
R13: ffff88803678ab00 R14: ffff8880216c8240 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123ded000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3f7ff7 CR3: 0000000021fb4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	00 49 83             	add    %cl,-0x7d(%rcx)
   3:	bc 24 c8 05 00       	mov    $0x5c824,%esp
   8:	00 00                	add    %al,(%rax)
   a:	0f 84 a6 07 00 00    	je     0x7b6
  10:	e8 fb b4 3b fa       	call   0xfa3bb510
  15:	49 8d 7f 60          	lea    0x60(%r15),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 08                	je     0x3a
  32:	3c 03                	cmp    $0x3,%al
  34:	0f 8e 4f 07 00 00    	jle    0x789
  3a:	45 8b 7f 60          	mov    0x60(%r15),%r15d
  3e:	31 ff                	xor    %edi,%edi

Crashes (211):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/06 22:06 upstream 0d8395707651 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/08/06 18:01 upstream 0d8395707651 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/08/06 02:13 upstream 0d8395707651 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/08/03 06:23 upstream bd1dde877520 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/08/02 23:59 upstream bd1dde877520 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in dummy_queue
2026/08/02 14:58 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
2026/08/02 13:56 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in dummy_queue
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
2026/07/28 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 13:24 upstream f5098b6bae76 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in dummy_queue
2026/07/25 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
2026/08/07 01:49 upstream fcaeecb8b0cd c38879ea .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/06 13:12 upstream 0d8395707651 cc56899a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/05 08:48 upstream 562bfb501c54 52aa2820 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/04 23:58 upstream 562bfb501c54 52aa2820 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/04 11:01 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/03 20:26 upstream 075b74841bd0 bdd50915 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/03 09:32 upstream 075b74841bd0 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/03 05:05 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/02 22:15 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/02 20:18 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/02 17:23 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/02 08:50 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/02 04:16 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/01 16:45 upstream 02dc699f83d0 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/08/01 06:06 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/31 22:58 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in dummy_queue
2026/07/31 19:01 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 17:50 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 12:25 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 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
2026/08/01 09:25 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in dummy_queue
2026/07/31 21:21 upstream 8ba098e6b6ff db462e94 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 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
2026/08/03 03:18 linux-next cc2b5f627e8c e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in dummy_queue
2026/08/01 04:58 linux-next cc2b5f627e8c 7664cf44 .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
2026/08/05 13:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7235a3e71949 b3eac40e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/05 06:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7235a3e71949 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/05 04:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7235a3e71949 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/04 12:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7235a3e71949 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/01 14:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e2d5e23967d0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/01 11:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e2d5e23967d0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/07/31 14:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 365f9c7a6b81 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in dummy_queue
2026/08/01 09:37 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte BUG: unable to handle kernel NULL pointer dereference in dummy_queue
* Struck through repros no longer work on HEAD.