Hello, syzbot found the following issue on: HEAD commit: d615b5416f8a Merge tag 'f2fs-fix-5.18' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=157d7830f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b6ba81e30e2008b1 dashboard link: https://syzkaller.appspot.com/bug?extid=10d79fa6d4fbfacaed2e compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+10d79fa6d4fbfacaed2e@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 5.18.0-rc4-syzkaller-00006-gd615b5416f8a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: events __usb_queue_reset_device RIP: 0010:usb_gadget_udc_reset+0x23/0xb0 drivers/usb/gadget/udc/core.c:1088 Code: 00 00 00 0f 1f 40 00 41 54 49 89 fc 53 48 89 f3 e8 02 88 b0 fb 48 8d 7b 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 70 4c 89 e7 ff 53 40 49 8d bc 24 80 00 00 00 48 b8 RSP: 0018:ffffc9000072f4e0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff85c7dcee RDI: 0000000000000040 RBP: ffff888044e50bfc R08: 0000000000000000 R09: ffff888044e50003 R10: ffffffff85c8e5e7 R11: 0000000000000001 R12: ffff888044e50c00 R13: ffff888044e50c00 R14: 0000000000000019 R15: ffff88806c056408 FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d9e2810f8 CR3: 000000006e13f000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> set_link_state+0xc83/0xf70 drivers/usb/gadget/udc/dummy_hcd.c:465 dummy_hub_control+0x1192/0x1f80 drivers/usb/gadget/udc/dummy_hcd.c:2315 rh_call_control drivers/usb/core/hcd.c:683 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline] usb_hcd_submit_urb+0xc83/0x2250 drivers/usb/core/hcd.c:1551 usb_submit_urb+0x86d/0x18a0 drivers/usb/core/urb.c:594 usb_start_wait_urb+0x101/0x4c0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 set_port_feature drivers/usb/core/hub.c:439 [inline] hub_port_reset+0x26d/0x1ce0 drivers/usb/core/hub.c:2968 hub_port_init+0x18a/0x2ed0 drivers/usb/core/hub.c:4714 usb_reset_and_verify_device+0x3a0/0xe10 drivers/usb/core/hub.c:5946 usb_reset_device+0x4bd/0x9a0 drivers/usb/core/hub.c:6122 __usb_queue_reset_device+0x68/0x90 drivers/usb/core/message.c:1904 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usb_gadget_udc_reset+0x23/0xb0 drivers/usb/gadget/udc/core.c:1088 Code: 00 00 00 0f 1f 40 00 41 54 49 89 fc 53 48 89 f3 e8 02 88 b0 fb 48 8d 7b 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 70 4c 89 e7 ff 53 40 49 8d bc 24 80 00 00 00 48 b8 RSP: 0018:ffffc9000072f4e0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff85c7dcee RDI: 0000000000000040 RBP: ffff888044e50bfc R08: 0000000000000000 R09: ffff888044e50003 R10: ffffffff85c8e5e7 R11: 0000000000000001 R12: ffff888044e50c00 R13: ffff888044e50c00 R14: 0000000000000019 R15: ffff88806c056408 FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d9e2810f8 CR3: 000000006e13f000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 0f 1f 40 00 nopl 0x0(%rax) 6: 41 54 push %r12 8: 49 89 fc mov %rdi,%r12 b: 53 push %rbx c: 48 89 f3 mov %rsi,%rbx f: e8 02 88 b0 fb callq 0xfbb08816 14: 48 8d 7b 40 lea 0x40(%rbx),%rdi 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 89 fa mov %rdi,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 75 70 jne 0x9f 2f: 4c 89 e7 mov %r12,%rdi 32: ff 53 40 callq *0x40(%rbx) 35: 49 8d bc 24 80 00 00 lea 0x80(%r12),%rdi 3c: 00 3d: 48 rex.W 3e: b8 .byte 0xb8 --- This report is generated by a bot. 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