general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 1 PID: 4802 Comm: dhcpcd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dummy_queue+0x1a3/0x8c0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 66 85 53 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:ffffc9000bf5f238 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff88802867b110 RCX: dffffc0000000000
RDX: ffff888073a29e00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff88802867b100 R08: ffffffff90b10307 R09: 1ffffffff2162060
R10: dffffc0000000000 R11: fffffbfff2162061 R12: 0000000000000050
R13: 1ffff110050cf620 R14: ffff8881453200e0 R15: ffff888145320c00
FS:  00007f5975fe4740(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe7835d74 CR3: 000000002818e000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_ep_queue+0xde/0x3d0 drivers/usb/gadget/udc/core.c:305
 eth_start_xmit+0x8b2/0xe70 drivers/usb/gadget/function/u_ether.c:590
 __netdev_start_xmit include/linux/netdevice.h:4894 [inline]
 netdev_start_xmit include/linux/netdevice.h:4908 [inline]
 xmit_one net/core/dev.c:3695 [inline]
 dev_hard_start_xmit+0x292/0x8b0 net/core/dev.c:3711
 sch_direct_xmit+0x24d/0x4a0 net/sched/sch_generic.c:345
 __dev_xmit_skb net/core/dev.c:3932 [inline]
 __dev_queue_xmit+0x180d/0x3810 net/core/dev.c:4337
 packet_snd net/packet/af_packet.c:3133 [inline]
 packet_sendmsg+0x3b95/0x4de0 net/packet/af_packet.c:3164
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x2d5/0x3e0 net/socket.c:1144
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x638/0xb10 fs/read_write.c:861
 vfs_writev fs/read_write.c:934 [inline]
 do_writev+0x27b/0x480 fs/read_write.c:977
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f597606e407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fffe7827040 EFLAGS: 00000202 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f5975fe4740 RCX: 00007f597606e407
RDX: 0000000000000002 RSI: 00007fffe78270a0 RDI: 0000000000000003
RBP: 0000000000000188 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffe78270e0
R13: 0000560a3d1a20a0 R14: 00007fffe7827130 R15: 00007fffe7837300
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_queue+0x1a3/0x8c0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 66 85 53 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:ffffc9000bf5f238 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff88802867b110 RCX: dffffc0000000000
RDX: ffff888073a29e00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffff88802867b100 R08: ffffffff90b10307 R09: 1ffffffff2162060
R10: dffffc0000000000 R11: fffffbfff2162061 R12: 0000000000000050
R13: 1ffff110050cf620 R14: ffff8881453200e0 R15: ffff888145320c00
FS:  00007f5975fe4740(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe7835d74 CR3: 000000002818e000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 66 85 53 fb       	call   0xfb538577
  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