From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 74D1C26B755 for ; Sun, 2 Aug 2026 00:00:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785628837; cv=none; b=oZL5FhO9lXFwfbNKyZcm/r+8JMJcpvgFfdhyjcie3qEx1K9VVre42Ezi9CABPuWZUve1n5hYbwMYfLZ42ARdJwB4T6Xq4X2p0Qz7zGfLffr8cNqeb+r0GPkBgU9S27olfRnR4AE/0jYbx87EagBFHyOX6VshZsneLZ7C5VRCllw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785628837; c=relaxed/simple; bh=ks6gcrOCzGEbLjwPSycMfAiXtoSvCn2EHdGjsoJ6CwE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=H2XlbFhl5fQ4oX0wO0JifZ1C30sh0uNvXvMoFvE448+3QpweTXr4tUk2iE+A6GvWGSZyixXmlYqZ+g9+T+BuGvqRNgVZeLmCezNgwymEFpq0ZlF2MVtcd3dWNt6Yc1czcgLrqoZQqgXJNSiC1s2j/1d14j9zlmEXeEjVztDy4DA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f207.google.com with SMTP id 5614622812f47-4a41f46d629so3256081b6e.3 for ; Sat, 01 Aug 2026 17:00:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785628834; x=1786233634; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Mt3Mk6075yffTYdkx+TP1YX32OctoNGwduY8tDf1C1s=; b=DcTx/4Z2Mh3cHTTrP/0caLye456JTxsr3D175yq4oWnOszSRAXdbHgYUYGoWERGhD7 6NtHVZoxEcbcjK8KSNQto4C8NKzT9Z8xjKTBMaELTgGal1LVEKfpJJujKOShSerre4ny JTdpXAaxeKQZ2qGlCqK0RVtUcqWDW1/QHYXr8VPrOnlbuXhqbC3YRuNxwGFGPbZ6J//S BA2BzXBLuuQsKpuu+Wj0Rfh1CUVBJMiErkBErcKw7obBBOiSbv4jzsMXJrlhNgPI7/gk IEPV12uJENrL55StJhNo/+QSW0ptiZrfWtFa+iYBu024HbjAnGAvbDwSINcquoqfkvHO hYSg== X-Forwarded-Encrypted: i=1; AHgh+RpaBUOcCkFqXAZkif0vAjaQF7CWeyF3wIiG7YtoEBtuqCuDHxbsaQskRkA3Ok874/bp4uhfjqwtCoc=@vger.kernel.org X-Gm-Message-State: AOJu0Yzuft6/wAHb1sfx+HHLdt3THRuPbceNS/VG/hrmZBlpMDEy8y5w KjxbHlS1pMHexX3XNedssWGXQoIMw5bBrXn4yU75BFq5cofUmcudPmxiWsVDH2fVT3YEQXO3DsD hOGCorfzFjlgqOFJKLUjMj9MNMpKZXrNhohQAD9l11W5UZJ5FjtjS522nffU= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:f8f:b0:4a4:c623:4c0b with SMTP id 5614622812f47-4af5e0cdd9fmr9061859b6e.4.1785628834280; Sat, 01 Aug 2026 17:00:34 -0700 (PDT) Date: Sat, 01 Aug 2026 17:00:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6e88a2.13bfb6d0.1ecdd5.0262.GAE@google.com> Subject: [syzbot] [usb?] general protection fault in emi26_probe From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: fc02acf6ac0c Merge tag 'platform-drivers-x86-v7.2-4' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=139b59b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4e38b15c29e6a1d9 dashboard link: https://syzkaller.appspot.com/bug?extid=baf3cbba7dd980984f0d compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/957761aebfb4/disk-fc02acf6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fb6aa2e6120f/vmlinux-fc02acf6.xz kernel image: https://storage.googleapis.com/syzbot-assets/f6ccc88e735d/bzImage-fc02acf6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+baf3cbba7dd980984f0d@syzkaller.appspotmail.com emi26 - firmware loader 9-1:1.0: emi26_probe start Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 5776 Comm: kworker/1:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:ihex_binrec_size include/linux/ihex.h:26 [inline] RIP: 0010:__ihex_next_binrec include/linux/ihex.h:35 [inline] RIP: 0010:ihex_validate_fw include/linux/ihex.h:54 [inline] RIP: 0010:request_ihex_firmware include/linux/ihex.h:74 [inline] RIP: 0010:emi26_load_firmware drivers/usb/misc/emi26.c:86 [inline] RIP: 0010:emi26_probe+0x283/0x1690 drivers/usb/misc/emi26.c:232 Code: ff 89 de e8 ef 8c 98 00 85 db 0f 84 d9 01 00 00 e8 42 89 98 00 48 bb 00 00 00 00 00 fc ff df 49 8d 7e 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7e 05 48 89 f8 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc900041eed60 EFLAGS: 00010257 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000 RDX: ffffc9001de82000 RSI: 000000000001a590 RDI: 0000000000000004 RBP: ffffc900041eee90 R08: ffffffff90579237 R09: 1ffffffff20af246 R10: dffffc0000000000 R11: fffffbfff20af247 R12: fffffffffffffffa R13: 1fffffffffffffff R14: 0000000000000000 R15: 1fffffffffffffff FS: 0000000000000000(0000) GS:ffff88812504e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3f2e7f CR3: 000000006020d000 CR4: 0000000000350ef0 Call Trace: usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3772 usb_new_device+0x99d/0x1620 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ihex_binrec_size include/linux/ihex.h:26 [inline] RIP: 0010:__ihex_next_binrec include/linux/ihex.h:35 [inline] RIP: 0010:ihex_validate_fw include/linux/ihex.h:54 [inline] RIP: 0010:request_ihex_firmware include/linux/ihex.h:74 [inline] RIP: 0010:emi26_load_firmware drivers/usb/misc/emi26.c:86 [inline] RIP: 0010:emi26_probe+0x283/0x1690 drivers/usb/misc/emi26.c:232 Code: ff 89 de e8 ef 8c 98 00 85 db 0f 84 d9 01 00 00 e8 42 89 98 00 48 bb 00 00 00 00 00 fc ff df 49 8d 7e 04 48 89 f8 48 c1 e8 03 <0f> b6 04 18 84 c0 75 47 49 8d 7e 05 48 89 f8 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc900041eed60 EFLAGS: 00010257 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000 RDX: ffffc9001de82000 RSI: 000000000001a590 RDI: 0000000000000004 RBP: ffffc900041eee90 R08: ffffffff90579237 R09: 1ffffffff20af246 R10: dffffc0000000000 R11: fffffbfff20af247 R12: fffffffffffffffa R13: 1fffffffffffffff R14: 0000000000000000 R15: 1fffffffffffffff FS: 0000000000000000(0000) GS:ffff88812504e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a5f5ed2f8 CR3: 0000000062c1e000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: ff 89 de e8 ef 8c decl -0x73101722(%rcx) 6: 98 cwtl 7: 00 85 db 0f 84 d9 add %al,-0x267bf025(%rbp) d: 01 00 add %eax,(%rax) f: 00 e8 add %ch,%al 11: 42 89 98 00 48 bb 00 rex.X mov %ebx,0xbb4800(%rax) 18: 00 00 add %al,(%rax) 1a: 00 00 add %al,(%rax) 1c: fc cld 1d: ff lcall (bad) 1e: df 49 8d fisttps -0x73(%rcx) 21: 7e 04 jle 0x27 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 75 47 jne 0x79 32: 49 8d 7e 05 lea 0x5(%r14),%rdi 36: 48 89 f8 mov %rdi,%rax 39: 48 c1 e8 03 shr $0x3,%rax 3d: 0f .byte 0xf 3e: b6 04 mov $0x4,%dh --- 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 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