Oops: stack segment: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 1210 Comm: kworker/0:2 Not tainted 6.15.0-syzkaller-11061-g7f9039c524a3 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:__queue_work+0x9e/0xfe0 kernel/workqueue.c:2256 Code: 8b 1d de 93 11 11 31 ff 89 de e8 fd 95 35 00 85 db 0f 85 fc 0c 00 00 e8 b0 91 35 00 49 8d 97 c0 01 00 00 48 89 d5 48 c1 ed 03 <42> 0f b6 44 25 00 84 c0 48 89 54 24 08 0f 85 44 0d 00 00 8b 1a 89 RSP: 0018:ffffc90000007708 EFLAGS: 00010002 RAX: ffffffff818ac930 RBX: 0000000000000000 RCX: ffff888026f5da00 RDX: 00000000000001c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000038 R08: ffff888034a23bf7 R09: 1ffff1100694477e R10: dffffc0000000000 R11: ffffed100694477f R12: dffffc0000000000 R13: ffff888034a23bf0 R14: 0000000000000008 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125c5e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a01da8cc8 CR3: 000000003240c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queue_work_on+0x181/0x270 kernel/workqueue.c:2392 __usb_hcd_giveback_urb+0x41a/0x690 drivers/usb/core/hcd.c:1650 dummy_timer+0x862/0x4550 drivers/usb/gadget/udc/dummy_hcd.c:1994 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0xa3/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:console_flush_all+0x7f7/0xc40 kernel/printk/printk.c:3227 Code: 48 21 c3 0f 85 e9 01 00 00 e8 e5 22 1f 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 d6 22 1f 00 eb 06 e8 cf 22 1f 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 8a ac 82 00 48 8b 1b 48 8b 44 24 RSP: 0018:ffffc90003e6f0a0 EFLAGS: 00000293 RAX: 1ffffffff1d36baf RBX: ffffffff8e9b5d78 RCX: ffff888026f5da00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003e6f1f0 R08: ffffffff8fa0e0f7 R09: 1ffffffff1f41c1e R10: dffffc0000000000 R11: fffffbfff1f41c1f R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e9b5d20 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4917 dev_printk_emit+0xe0/0x130 drivers/base/core.c:4928 _dev_info+0x10a/0x160 drivers/base/core.c:4986 usb_disconnect+0xdd/0x910 drivers/usb/core/hub.c:2298 hub_port_connect drivers/usb/core/hub.c:5371 [inline] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] port_event drivers/usb/core/hub.c:5831 [inline] hub_event+0x1cdb/0x4a00 drivers/usb/core/hub.c:5913 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__queue_work+0x9e/0xfe0 kernel/workqueue.c:2256 Code: 8b 1d de 93 11 11 31 ff 89 de e8 fd 95 35 00 85 db 0f 85 fc 0c 00 00 e8 b0 91 35 00 49 8d 97 c0 01 00 00 48 89 d5 48 c1 ed 03 <42> 0f b6 44 25 00 84 c0 48 89 54 24 08 0f 85 44 0d 00 00 8b 1a 89 RSP: 0018:ffffc90000007708 EFLAGS: 00010002 RAX: ffffffff818ac930 RBX: 0000000000000000 RCX: ffff888026f5da00 RDX: 00000000000001c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000038 R08: ffff888034a23bf7 R09: 1ffff1100694477e R10: dffffc0000000000 R11: ffffed100694477f R12: dffffc0000000000 R13: ffff888034a23bf0 R14: 0000000000000008 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125c5e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a01da8cc8 CR3: 000000003240c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 1d de 93 11 11 mov 0x111193de(%rip),%ebx # 0x111193e4 6: 31 ff xor %edi,%edi 8: 89 de mov %ebx,%esi a: e8 fd 95 35 00 call 0x35960c f: 85 db test %ebx,%ebx 11: 0f 85 fc 0c 00 00 jne 0xd13 17: e8 b0 91 35 00 call 0x3591cc 1c: 49 8d 97 c0 01 00 00 lea 0x1c0(%r15),%rdx 23: 48 89 d5 mov %rdx,%rbp 26: 48 c1 ed 03 shr $0x3,%rbp * 2a: 42 0f b6 44 25 00 movzbl 0x0(%rbp,%r12,1),%eax <-- trapping instruction 30: 84 c0 test %al,%al 32: 48 89 54 24 08 mov %rdx,0x8(%rsp) 37: 0f 85 44 0d 00 00 jne 0xd81 3d: 8b 1a mov (%rdx),%ebx 3f: 89 .byte 0x89