general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 PID: 5434 Comm: dhcpcd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:dummy_queue+0x1a7/0x8c0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 82 cd 25 fb 4d 8b 24 24 49 83 c4 50 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 ea 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc900037b7688 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff888030b1fa10 RCX: dffffc0000000000
RDX: ffff88802a5a1e00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff888030b1fa00 R08: ffff88805d1586e3 R09: 1ffff1100ba2b0dc
R10: dffffc0000000000 R11: ffffed100ba2b0dd R12: 0000000000000050
R13: 1ffff11006163f40 R14: ffff888141f542c0 R15: ffff888141f54c00
FS:  00007f291bebf740(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70fc6660e0 CR3: 000000002ffdf000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 usb_ep_queue+0xea/0x350 drivers/usb/gadget/udc/core.c:303
 rx_submit+0x34c/0x780 drivers/usb/gadget/function/u_ether.c:208
 rx_fill+0x15b/0x2e0 drivers/usb/gadget/function/u_ether.c:385
 eth_start drivers/usb/gadget/function/u_ether.c:609 [inline]
 eth_open+0xac/0x2b0 drivers/usb/gadget/function/u_ether.c:623
 __dev_open+0x2cb/0x430 net/core/dev.c:1519
 __dev_change_flags+0x1e8/0x6a0 net/core/dev.c:8723
 dev_change_flags+0x7c/0x1a0 net/core/dev.c:8795
 devinet_ioctl+0x949/0x1d70 net/ipv4/devinet.c:1177
 inet_ioctl+0x42b/0x560 net/ipv4/af_inet.c:1000
 sock_do_ioctl+0xfc/0x310 net/socket.c:1220
 sock_ioctl+0x5be/0x7e0 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f291bfbf378
Code: 00 00 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 07 89 d0 c3 0f 1f 40 00 48 8b 15 49 3a 0d
RSP: 002b:00007ffc53fe2888 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007f291bfbf378
RDX: 00007ffc53ff2a80 RSI: 0000000000008914 RDI: 0000000000000012
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc54002c20
R13: 00007f291bebf6c8 R14: 0000000000000028 R15: 0000000000008914
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_queue+0x1a7/0x8c0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 82 cd 25 fb 4d 8b 24 24 49 83 c4 50 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 ea 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc900037b7688 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff888030b1fa10 RCX: dffffc0000000000
RDX: ffff88802a5a1e00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff888030b1fa00 R08: ffff88805d1586e3 R09: 1ffff1100ba2b0dc
R10: dffffc0000000000 R11: ffffed100ba2b0dd R12: 0000000000000050
R13: 1ffff11006163f40 R14: ffff888141f542c0 R15: ffff888141f54c00
FS:  00007f291bebf740(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557ee86a78 CR3: 000000002ffdf000 CR4: 00000000003506e0
----------------
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 82 cd 25 fb       	call   0xfb25cd93
  11:	4d 8b 24 24          	mov    (%r12),%r12
  15:	49 83 c4 50          	add    $0x50,%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 ea 05 00 00    	jne    0x620
  36:	45 8b 24 24          	mov    (%r12),%r12d
  3a:	44 89 e6             	mov    %r12d,%esi
  3d:	83 e6 02             	and    $0x2,%esi