Hello, syzbot found the following issue on: HEAD commit: 4d6d4c7f541d Merge tag 'linux-kselftest-fixes-6.4-rc3' of .. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15a9a641280000 kernel config: https://syzkaller.appspot.com/x/.config?x=ac0db1213414a978 dashboard link: https://syzkaller.appspot.com/bug?extid=27b0b464864741b18b99 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12bc26ee280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17684629280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ebfde1c1eecf/disk-4d6d4c7f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4938c9109cd4/vmlinux-4d6d4c7f.xz kernel image: https://storage.googleapis.com/syzbot-assets/8c31ee617052/bzImage-4d6d4c7f.xz The issue was bisected to: commit ebad8e731c1c06adf04621d6fd327b860c0861b5 Author: Duoming Zhou <duoming@xxxxxxxxxx> Date: Mon Jan 23 02:04:38 2023 +0000 media: usb: siano: Fix use after free bugs caused by do_submit_urb bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16584629280000 final oops: https://syzkaller.appspot.com/x/report.txt?x=15584629280000 console output: https://syzkaller.appspot.com/x/log.txt?x=11584629280000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+27b0b464864741b18b99@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: ebad8e731c1c ("media: usb: siano: Fix use after free bugs caused by do_submit_urb") usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: syz usb 1-1: Manufacturer: syz usb 1-1: SerialNumber: syz usb 1-1: config 0 descriptor?? smsusb:smsusb_probe: board id=7, interface number 0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 897 at kernel/workqueue.c:3182 __flush_work+0x946/0xb60 kernel/workqueue.c:3182 Modules linked in: CPU: 0 PID: 897 Comm: kworker/0:2 Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Workqueue: usb_hub_wq hub_event RIP: 0010:__flush_work+0x946/0xb60 kernel/workqueue.c:3182 Code: 00 48 c7 c6 9b f7 53 81 48 c7 c7 40 90 79 8c e8 d0 ec 11 00 e9 6f fc ff ff e8 06 4b 30 00 0f 0b e9 63 fc ff ff e8 fa 4a 30 00 <0f> 0b 45 31 ed e9 54 fc ff ff e8 5b 12 83 00 e9 3e fb ff ff e8 e1 RSP: 0018:ffffc90005026c08 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88801f5e20e8 RCX: 0000000000000000 RDX: ffff88801f431dc0 RSI: ffffffff8153f7d6 RDI: 0000000000000001 RBP: ffffc90005026da0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff81d6e1f2 R12: ffff88801f5e20e8 R13: 0000000000000001 R14: 0000000000000001 R15: ffff88801f5e2100 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560d76a382c8 CR3: 0000000026f34000 CR4: 0000000000350ef0 Call Trace: <TASK> --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, 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 change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
