From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (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 73E814582C7 for ; Fri, 28 Aug 2026 15:14:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787930069; cv=none; b=YueqPmBRsQHsSvpft508Ez6GWg9FMp1aLzb8Jmsu0Xf7Y1OpFvi+HHvpbv+zpoVNlpTphlU0VBvPTuQ4a/9qDarci1bkJzXVVLRySC25XJSUw1z6si7ROzVwVAajx4bPdgdDnFsiNmWDktsRK8/EWsfgFTlqFytcniqzueTMU2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787930069; c=relaxed/simple; bh=bxkizeat5GUcIP4sFJ+GCIBzsET33wm+HcTeHEwKYLY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=dA/eiRS4g4tDIofp0QYzdJJeu5oupQ/VjBiLM8izQddBngo7yTm6cXa2Q5TToFtwkWJNhsT7ne1S2sKkwvKsr6qtNIKlAQB7shzr6XRiA4cu8R0FdHO851hynCGqiDtbu4vk37x/PWHqGVEPBy/fkI6CFqHFtL3cFDmC4GfoaCA= 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=209.85.167.205 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-f205.google.com with SMTP id 5614622812f47-4b3b05aa29dso26109b6e.0 for ; Fri, 28 Aug 2026 08:14:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787930066; x=1788534866; 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=F35JUbY5RodIRW30ZhUW7omH8qQRFCxSw/t423wJwO0=; b=RiWZhxR2Nd2yNy7JXfewPgzdCUK0z7jn3tq8hf/OGUrFoCP/XG5EZkXyiG0vQzukWa oMEW/gqi62m7aCpffpCv4moDPZ6ETkI3MyQKHfenslgGJeLkJjuYRlkcxAQ7VsuZZdR1 D49UMJa/xoRVwNk2C0Z4HOPyP9G0P4ysMJodk4U28kEBdEmityBXHGqk770dhoAZhHJo I6veK2kpHvpd+UuCaKGXb9ilCbhRLCTScs+WemaQTBsyyldoTs3KMxC/Bri71/WJsVdX WmM5YjgW259/fZcDI+kDhQOVezdXb6o+LsK+MSIJPRb2PUrSWDn/jdk0+sx7NqPNLAQ8 Ntxw== X-Forwarded-Encrypted: i=1; AHgh+RoSNdX54arRfcC+Hlo9aInWEdAxsvhfuXMDaVegS5Vg/inRRzo3b2bgnEHEkT57msTaFtawiDmTo3s=@vger.kernel.org X-Gm-Message-State: AFuF++n/GhpYeESCnInQmbuvb5DiYvy7zhLyljuOH0pRWsNPCmswQUKe x9PCdnldqyLxOEeff0sXPZb+229yuu3bLYy2iZsMysJyNeOZVsT1m6AbvoUFsMbAZytr6CvD3cE R9Tmb25zmufdEWulhYxwxzFkaphJ+FE1Zkvimz42za9i5P/J1St0xWpPYp40= 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:c173:b0:492:c9a4:2104 with SMTP id 5614622812f47-4b37c999474mr12651871b6e.10.1787930066527; Fri, 28 Aug 2026 08:14:26 -0700 (PDT) Date: Fri, 28 Aug 2026 08:14:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a91a5d2.4d659fcc.734b4.0021.GAE@google.com> Subject: [syzbot] [input?] [usb?] KASAN: slab-use-after-free Read in k90_backlight_work From: syzbot To: linux-input@vger.kernel.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: 73e3f0710014 Merge tag 'nfs-for-7.3-1' of git://git.linux-.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17a76579580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9efed59cf70d6280 dashboard link: https://syzkaller.appspot.com/bug?extid=abcedffc9201f2bb66c2 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/ef9dc2fd7978/disk-73e3f071.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1de9c5b90e55/vmlinux-73e3f071.xz kernel image: https://storage.googleapis.com/syzbot-assets/79167e663675/bzImage-73e3f071.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+abcedffc9201f2bb66c2@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in k90_backlight_work+0x174/0x1c0 drivers/hid/hid-corsair.c:209 Read of size 1 at addr ffff888026a23b00 by task kworker/1:3/5600 CPU: 1 UID: 0 PID: 5600 Comm: kworker/1:3 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events k90_backlight_work Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 k90_backlight_work+0x174/0x1c0 drivers/hid/hid-corsair.c:209 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 kthread+0x38b/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 Allocated by task 11427: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x3d5/0x680 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] k90_init_backlight drivers/hid/hid-corsair.c:430 [inline] corsair_probe+0x627/0xbc0 drivers/hid/hid-corsair.c:589 __hid_device_probe drivers/hid/hid-core.c:2839 [inline] hid_device_probe+0x46a/0x870 drivers/hid/hid-core.c:2878 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+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 hid_add_device+0x272/0x3e0 drivers/hid/hid-core.c:3065 usbhid_probe+0x9dc/0xde0 drivers/hid/usbhid/hid-core.c:1452 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399 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+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 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:293 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+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 usb_new_device+0x99a/0x1680 drivers/usb/core/hub.c:2708 hub_port_connect drivers/usb/core/hub.c:5580 [inline] hub_port_connect_change drivers/usb/core/hub.c:5720 [inline] port_event drivers/usb/core/hub.c:5884 [inline] hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5966 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 kthread+0x38b/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 Freed by task 11427: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6499 [inline] kfree+0x1c5/0x6d0 mm/slub.c:6792 hid_device_remove+0xc8/0x1d0 drivers/hid/hid-core.c:2897 --- 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