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AFNElJ8n6Z7Ieagyv6Gt9B0J4zmBmss75IeK4qc4CFUYZ61Tlf50haX/PCgutHm5Nha4tXgbX99/gZA=@vger.kernel.org X-Gm-Message-State: AOJu0Yz7jMj+Ql1QCSctHcJsELE7EZjONeKQfHLrGvwRO/p4O6mdAWly ieZjiRGmCMa9bCmkaiFGS+sQX7BFTSGCs0z6qiZdKrFdE7LLyYmhvXgKHOM+Ir4nk97HGTQxFeX YL7ulv38KZdwLuCSDFcYtWK0sFehZt+E8QufliwGvmTTpdf9dDCqcLwOyKA8= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:5296:b0:491:bee4:d722 with SMTP id 5614622812f47-495eaf639a5mr851332b6e.23.1782767367604; Mon, 29 Jun 2026 14:09:27 -0700 (PDT) Date: Mon, 29 Jun 2026 14:09:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a42df07.854d4ab9.360e1d.000d.GAE@google.com> Subject: [syzbot] [usb?] KASAN: slab-use-after-free Read in uea_upload_pre_firmware From: syzbot To: 3chas3@gmail.com, castet.matthieu@free.fr, gregkh@linuxfoundation.org, linux-atm-general@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, stf_xl@wp.pl, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3d5670d672ae Add linux-next specific files for 20260626 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10b76dfe580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2bb8183b2d472f18 dashboard link: https://syzkaller.appspot.com/bug?extid=3d45d763d18796f97412 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fa0e1c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13519391580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a96151aa0055/disk-3d5670d6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cdb70a1a6c6c/vmlinux-3d5670d6.xz kernel image: https://storage.googleapis.com/syzbot-assets/3ffb9df12cc1/bzImage-3d5670d6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3d45d763d18796f97412@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline] BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x8d/0x640 drivers/usb/atm/ueagle-atm.c:598 Read of size 8 at addr ffff88802b0710b8 by task kworker/0:2/1664 CPU: 0 UID: 0 PID: 1664 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events request_firmware_work_func 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 __intf_to_usbdev include/linux/usb.h:752 [inline] uea_upload_pre_firmware+0x8d/0x640 drivers/usb/atm/ueagle-atm.c:598 request_firmware_work_func+0xf7/0x2d0 drivers/base/firmware_loader/main.c:1164 process_one_work+0x93a/0x12b0 kernel/workqueue.c:3326 process_scheduled_works kernel/workqueue.c:3409 [inline] worker_thread+0xb05/0x10d0 kernel/workqueue.c:3490 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 Allocated by task 5937: 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+0x3d2/0x6b0 mm/slub.c:5515 _kmalloc_noprof include/linux/slab.h:969 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] usb_set_configuration+0x3cc/0x2180 drivers/usb/core/message.c:2096 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+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:3772 usb_new_device+0x98d/0x1610 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+0x28cf/0x4cf0 drivers/usb/core/hub.c:5953 --- 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