From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 50CDE2FF17F for ; Thu, 4 Dec 2025 18:31:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.65 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764873091; cv=none; b=ajdejyg/66XZJEZf3CMpRxIJKcYXiuJmk5CTLD8a0hLwpuY10dIDeRAwdFDJ4rEfqdd3Me3NUxve277k/lv25GfwHH2zfOjNOaeUzvcGoi13Ef2LNTLRa4qv5PfUz8JSsZwX6hzuHjGNJm1n64e2mtr7cuWemSwtDidVeLMnNUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764873091; c=relaxed/simple; bh=jSHYapf3boxLITW0PS+iwi8+51LITAPdiG/mnMQ6Fx0=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; 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t=1764873079; bh=79jqsZYqZKZdxq2JPfOFLqwH7SdzTat2Gic7niqwR1g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type: From; b=YJAqOqeGihXA2zib6boBhF8JDxyNYGxOIXpaAOKRPXwgl8ui/aNURI4xmiPfghU+j pqQbgr1w+6THzPJcqSKG1pFwjkwyZZop1CK42rEYfH35M5Jm50zi/8Vqu6Cqm3lfEc xYd0DPuWdDJ3y7H97/eXjmjDP6dTNi2SvEsIxoeAhHpNKSBscHJkUa481F5xwIgc6m ASLR4tniY5uPaN4TblzJHPU7g3sG2scdMyqwwGDqtpyfUnXtS5b+mGKJs0aMlYWnxo x9veezqjRSxPLyWa+jnSPqF58sf+PHWY7sE5lhKYv5CzNc1mVBvp6/h1Gih92HFpW7 tfF5+FDdkvKTA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4dMjks3pkBz6tsb; Thu, 4 Dec 2025 19:31:17 +0100 (CET) From: Charalampos Mitrodimas To: syzbot Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [usb?] WARNING in usb_start_wait_urb In-Reply-To: <692c9de5.050a0220.2ffa18.0016.GAE@google.com> References: <692c9de5.050a0220.2ffa18.0016.GAE@google.com> Date: Thu, 04 Dec 2025 18:31:18 +0000 Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain syzbot writes: > Hello, > > syzbot found the following issue on: > > HEAD commit: 7d31f578f323 Add linux-next specific files for 20251128 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=119c8192580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ec890b8333fce099 > dashboard link: https://syzkaller.appspot.com/bug?extid=e6a50a2e7cbb4f775d04 > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17bdbcb4580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1413b0c2580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/9bcc6eb60940/disk-7d31f578.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/895bc1bfae48/vmlinux-7d31f578.xz > kernel image: https://storage.googleapis.com/syzbot-assets/48f15e4679f3/bzImage-7d31f578.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+e6a50a2e7cbb4f775d04@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > usb 1-1: BOGUS control dir, pipe 80000280 doesn't match bRequestType c0 > WARNING: drivers/usb/core/urb.c:414 at 0x0, CPU#0: syz.0.17/6025 > Modules linked in: > CPU: 0 UID: 0 PID: 6025 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 > RIP: 0010:usb_submit_urb+0x111c/0x18d0 drivers/usb/core/urb.c:412 > Code: b8 00 00 00 00 00 fc ff df 0f b6 44 05 00 84 c0 0f 85 a7 05 00 00 45 0f b6 45 00 48 8b 3c 24 48 8b 74 24 20 4c 89 fa 44 89 f1 <67> 48 0f b9 3a 49 bf 00 00 00 00 00 fc ff df e9 b7 f2 ff ff 89 e9 > RSP: 0018:ffffc90003487820 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: ffff8880726bb700 RCX: 0000000080000280 > RDX: ffff888071228200 RSI: ffffffff8c3575e0 RDI: ffffffff8fcf8fd0 > RBP: 1ffff1100e666078 R08: 00000000000000c0 R09: 0000000000000000 > R10: ffffc90003487920 R11: fffff52000690f30 R12: ffff888076835100 > R13: ffff8880733303c0 R14: 0000000080000280 R15: ffff888071228200 > FS: 00007fe073fd66c0(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000200000001480 CR3: 000000007ecd2000 CR4: 00000000003526f0 > Call Trace: > > usb_start_wait_urb+0x115/0x4f0 drivers/usb/core/message.c:59 > usb_internal_control_msg drivers/usb/core/message.c:103 [inline] > usb_control_msg+0x232/0x3e0 drivers/usb/core/message.c:154 > dib0700_ctrl_rd drivers/media/usb/dvb-usb/dib0700_core.c:95 [inline] > dib0700_i2c_xfer_legacy drivers/media/usb/dvb-usb/dib0700_core.c:315 [inline] > dib0700_i2c_xfer+0xba7/0xf70 drivers/media/usb/dvb-usb/dib0700_core.c:361 > __i2c_transfer+0x871/0x2110 drivers/i2c/i2c-core-base.c:-1 > i2c_transfer+0x25b/0x3a0 drivers/i2c/i2c-core-base.c:2317 > i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306 > i2cdev_ioctl+0x64b/0x820 drivers/i2c/i2c-dev.c:467 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:597 [inline] > __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7fe07318f749 > 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:00007fe073fd6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007fe0733e5fa0 RCX: 00007fe07318f749 > RDX: 0000200000000200 RSI: 0000000000000707 RDI: 0000000000000004 > RBP: 00007fe073213f91 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fe0733e6038 R14: 00007fe0733e5fa0 R15: 00007ffe02ef2178 > > ---------------- > Code disassembly (best guess): > 0: b8 00 00 00 00 mov $0x0,%eax > 5: 00 fc add %bh,%ah > 7: ff (bad) > 8: df 0f fisttps (%rdi) > a: b6 44 mov $0x44,%dh > c: 05 00 84 c0 0f add $0xfc08400,%eax > 11: 85 a7 05 00 00 45 test %esp,0x45000005(%rdi) > 17: 0f b6 45 00 movzbl 0x0(%rbp),%eax > 1b: 48 8b 3c 24 mov (%rsp),%rdi > 1f: 48 8b 74 24 20 mov 0x20(%rsp),%rsi > 24: 4c 89 fa mov %r15,%rdx > 27: 44 89 f1 mov %r14d,%ecx > * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction > 2f: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 > 36: fc ff df > 39: e9 b7 f2 ff ff jmp 0xfffff2f5 > 3e: 89 e9 mov %ebp,%ecx > > > --- > 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@googlegroups.com. > > 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 #syz test: https://github.com/charmitro/linux.git f231ce51303079e1efe987fd83e04efa3b047988