Hello, syzbot found the following issue on: HEAD commit: 68d4209158f4 sub: cdns3: Use predefined PCI vendor ID cons.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=139b97c7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb61872d4d8c5df9 dashboard link: https://syzkaller.appspot.com/bug?extid=a11c46f37ee083a73deb compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1571e797980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11166200580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c69290425359/disk-68d42091.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/caf4f26a3e85/vmlinux-68d42091.xz kernel image: https://storage.googleapis.com/syzbot-assets/3acdec4b62e6/bzImage-68d42091.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a11c46f37ee083a73deb@xxxxxxxxxxxxxxxxxxxxxxxxx list_del corruption. next->prev should be ffff888112424250, but was 0000000000000000. (next=ffff888112acc250) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:65! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 42 Comm: kworker/0:2 Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:__list_del_entry_valid_or_report+0x141/0x1c0 lib/list_debug.c:65 Code: e1 fe 90 0f 0b 48 89 c2 48 c7 c7 a0 9e 46 87 e8 05 b1 e1 fe 90 0f 0b 48 89 d1 48 c7 c7 20 9f 46 87 48 89 c2 e8 f0 b0 e1 fe 90 <0f> 0b 48 89 34 24 e8 d4 2e 57 ff 48 8b 34 24 e9 d5 fe ff ff 48 89 RSP: 0018:ffffc900004d76f0 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffffffff89df37a0 RCX: ffffffff813560b9 RDX: 0000000000000000 RSI: ffffffff8135f4f6 RDI: 0000000000000005 RBP: ffff888112424250 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888112424000 R14: ffffffff89e0d908 R15: ffff888121f0c000 FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055853d6842e0 CR3: 0000000111614000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] em28xx_close_extension+0x10e/0x2b0 drivers/media/usb/em28xx/em28xx-core.c:1137 em28xx_usb_disconnect+0x19d/0x610 drivers/media/usb/em28xx/em28xx-cards.c:4197 usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:568 [inline] device_remove+0x122/0x170 drivers/base/dd.c:560 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22f/0x420 drivers/base/bus.c:574 device_del+0x396/0x9f0 drivers/base/core.c:3871 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2304 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5903 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x141/0x1c0 lib/list_debug.c:65 Code: e1 fe 90 0f 0b 48 89 c2 48 c7 c7 a0 9e 46 87 e8 05 b1 e1 fe 90 0f 0b 48 89 d1 48 c7 c7 20 9f 46 87 48 89 c2 e8 f0 b0 e1 fe 90 <0f> 0b 48 89 34 24 e8 d4 2e 57 ff 48 8b 34 24 e9 d5 fe ff ff 48 89 RSP: 0018:ffffc900004d76f0 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffffffff89df37a0 RCX: ffffffff813560b9 RDX: 0000000000000000 RSI: ffffffff8135f4f6 RDI: 0000000000000005 RBP: ffff888112424250 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888112424000 R14: ffffffff89e0d908 R15: ffff888121f0c000 FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055853d6842e0 CR3: 0000000111614000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
