list_add double add: new=ffff88806a37e818, prev=ffff88806a37e818, next=ffff88807a6b9070. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:35! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 16361 Comm: syz.6.2731 Not tainted 6.12.0-syzkaller-09567-g7eef7e306d3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__list_add_valid_or_report+0xd6/0x100 lib/list_debug.c:35 Code: 89 f1 48 c7 c7 00 d8 d1 8b 48 89 de e8 83 e3 d3 fc 90 0f 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 80 d8 d1 8b e8 6b e3 d3 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 cc 9b 57 fd 48 8b 34 24 e9 6c ff ff RSP: 0018:ffffc9000e44f4b0 EFLAGS: 00010086 RAX: 0000000000000058 RBX: ffff88807a6b9070 RCX: ffffc900230c9000 RDX: 0000000000000000 RSI: ffffffff816eb726 RDI: 0000000000000005 RBP: ffff88806a37e818 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000004 R11: ffffffff96232c78 R12: 0000000000000000 R13: ffff88806a37e818 R14: ffff88806a37e818 R15: ffff88807a6b9078 FS: 00007fcf007746c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ff20000 CR3: 000000004dcf8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add_tail include/linux/list.h:183 [inline] usb_hcd_link_urb_to_ep+0x21d/0x390 drivers/usb/core/hcd.c:1158 dummy_urb_enqueue+0x291/0x8e0 drivers/usb/gadget/udc/dummy_hcd.c:1287 usb_hcd_submit_urb+0x2d1/0x2090 drivers/usb/core/hcd.c:1533 usb_submit_urb+0x87c/0x1730 drivers/usb/core/urb.c:581 cm109_submit_buzz_toggle+0xd8/0x180 drivers/input/misc/cm109.c:351 cm109_toggle_buzzer_async+0x90/0xa0 drivers/input/misc/cm109.c:484 cm109_input_ev+0x171/0x1b0 drivers/input/misc/cm109.c:615 input_event_dispose drivers/input/input.c:321 [inline] input_handle_event+0x14e/0x14d0 drivers/input/input.c:369 input_inject_event+0x1bb/0x370 drivers/input/input.c:428 kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256 input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2623 kd_mksound+0x89/0x130 drivers/tty/vt/keyboard.c:280 handle_ascii drivers/tty/vt/vt.c:2251 [inline] do_con_trol drivers/tty/vt/vt.c:2568 [inline] do_con_write+0x2e6f/0x7bb0 drivers/tty/vt/vt.c:3092 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0x419/0x1140 drivers/tty/n_tty.c:2389 iterate_tty_write drivers/tty/tty_io.c:1015 [inline] file_tty_write.constprop.0+0x506/0x9a0 drivers/tty/tty_io.c:1090 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fceff97e819 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcf00774038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fceffb36080 RCX: 00007fceff97e819 RDX: 0000000000001006 RSI: 0000000020001040 RDI: 0000000000000008 RBP: 00007fceff9f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fceffb36080 R15: 00007ffe1ab40c38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid_or_report+0xd6/0x100 lib/list_debug.c:35 Code: 89 f1 48 c7 c7 00 d8 d1 8b 48 89 de e8 83 e3 d3 fc 90 0f 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 80 d8 d1 8b e8 6b e3 d3 fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 cc 9b 57 fd 48 8b 34 24 e9 6c ff ff RSP: 0018:ffffc9000e44f4b0 EFLAGS: 00010086 RAX: 0000000000000058 RBX: ffff88807a6b9070 RCX: ffffc900230c9000 RDX: 0000000000000000 RSI: ffffffff816eb726 RDI: 0000000000000005 RBP: ffff88806a37e818 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000004 R11: ffffffff96232c78 R12: 0000000000000000 R13: ffff88806a37e818 R14: ffff88806a37e818 R15: ffff88807a6b9078 FS: 00007fcf007746c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ff20000 CR3: 000000004dcf8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400