From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 282C022F754 for ; Tue, 3 Jun 2025 11:09:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748948970; cv=none; b=OcC+A06AEYbp+Xkn91PLYiOgUr40sF+hsecnqOU436nMzJdIiQwNBqq0YumRtxaxA0tuoZfyntHmYXpSfke9LOQeozvWwx8IlOsqcEmUsSgg3IEOsoocELQo5tnDh9gtcuLeNsrCA8H+p0RC0Ocrl+5S38gTL+7pHzfwx4VjC2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748948970; c=relaxed/simple; bh=7AJk0uaMxjhbGSEw1O8hovlbaal+cQYmGtNQ5JanFdI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=XKJv5c0IgAMVFk5RupXcFvzRexlimzVuqgZPgym1Ory2CVM8ZRe62uz+XcVyzOYiPTJhoH4DuLAvzoyQghzDDs7Ypsu77U1Q40rby0NR4/R5mC2sL5cwlL0uiVARUndhNDVYm54OaFosQnKNME/l+0qddQJbmy2kdfIMRE8sBAg= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-3ddbc8be478so581385ab.0 for ; Tue, 03 Jun 2025 04:09:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748948967; x=1749553767; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8J7/1M2viPHa1zyUPQ9DGdd2Fw+RRfPsqvU0OMau/Us=; b=mREyXexTWDyCT8Yrf79EdjkbgmvMGFrqE1qdeDsct0CyuLmOkNe6r0c9Uc1jSaMjNN 0KTchlg/isOIJiT+9U/ATNkNhe5Hzm5OcK87UscHiIQwl7ETSGjPqxn269fireZr2qSO JJjD1DY5jU2xIKlit+8K6WFOwUOmPkkWy6vt2NYshY/r1VfOi8cDJmeEeJLahoaLupH0 /HKI3CY+QpQDoN9jTnS8Z2fr+kGeo9VtdeVXZFtFBzE+fcZ0nbDulDrVo+ghXy7K0uID VH8Qgt0NxaQ+uZqjT6JI07xfokqIuAaEqQAeeg8Yl2Nn6ZEKXJitoQP6rMZWxG8qsfFj aInQ== X-Forwarded-Encrypted: i=1; AJvYcCWuqyTzd1eI+hcH7ACBiorn2Sr/7r0VGy0Qan0BHiLFBr/eIZKOpbRexbvdUqNHZzSevKmqKjQDPhw=@vger.kernel.org X-Gm-Message-State: AOJu0Yw1lnyH48c/bqsInonYgBdXWbE1RZEVy+gXC8fVV9RbDJ4/Co3q 23MT8WBi9jCf6OGe3ukktZfYqrK3ySBPkrMuMlUkKemGvW2stdnufp0/n5k1p4LFaZUeSRiL396 aOiSF6J444YnoGhlLbIdA+CrX+0TNRtn3ZTSfHWotNW4DKVOtb3KOZyk0BuI= X-Google-Smtp-Source: AGHT+IEmMad6/B7CXdhY1eKM8Ogg3XYyd8oS+a0ExqT8gARwd0Zv12FC3vRGW2Q0JrDe2Tcozch7eWhqH0A4udEWIzOJO4osr8NZ Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:681:b0:3dc:9d32:6373 with SMTP id e9e14a558f8ab-3ddb7808fc6mr14842615ab.2.1748948966912; Tue, 03 Jun 2025 04:09:26 -0700 (PDT) Date: Tue, 03 Jun 2025 04:09:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <683ed7e6.a00a0220.d8eae.006b.GAE@google.com> Subject: [syzbot] [usb?] KASAN: slab-use-after-free Read in raw_event_queue_add From: syzbot To: andreyknvl@gmail.com, 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: 90b83efa6701 Merge tag 'bpf-next-6.16' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15f34ed4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e08eccd6d0881a82 dashboard link: https://syzkaller.appspot.com/bug?extid=1e3edf922962b5ea40a4 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-90b83efa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f11f969da590/vmlinux-90b83efa.xz kernel image: https://storage.googleapis.com/syzbot-assets/a3cff7a358cf/bzImage-90b83efa.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1e3edf922962b5ea40a4@syzkaller.appspotmail.com usb usb7-port1: attempt power cycle ================================================================== BUG: KASAN: slab-use-after-free in raw_event_queue_add+0x1e0/0x220 drivers/usb/gadget/legacy/raw_gadget.c:81 Read of size 4 at addr ffff888064f0a978 by task kworker/0:3/5979 CPU: 0 UID: 0 PID: 5979 Comm: kworker/0:3 Not tainted 6.15.0-syzkaller-07774-g90b83efa6701 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xcd/0x680 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 raw_event_queue_add+0x1e0/0x220 drivers/usb/gadget/legacy/raw_gadget.c:81 raw_queue_event drivers/usb/gadget/legacy/raw_gadget.c:239 [inline] gadget_disconnect+0x5a/0x130 drivers/usb/gadget/legacy/raw_gadget.c:387 set_link_state+0x8e8/0xf70 drivers/usb/gadget/udc/dummy_hcd.c:471 dummy_hub_control+0x1620/0x1f00 drivers/usb/gadget/udc/dummy_hcd.c:2147 rh_call_control drivers/usb/core/hcd.c:656 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:821 [inline] usb_hcd_submit_urb+0xc3c/0x1c60 drivers/usb/core/hcd.c:1529 usb_submit_urb+0x87c/0x1730 drivers/usb/core/urb.c:581 usb_start_wait_urb+0x104/0x4b0 drivers/usb/core/message.c:59 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154 usb_clear_port_feature drivers/usb/core/hub.c:454 [inline] usb_hub_set_port_power+0x128/0x190 drivers/usb/core/hub.c:892 hub_port_connect drivers/usb/core/hub.c:5571 [inline] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] port_event drivers/usb/core/hub.c:5831 [inline] hub_event+0x3a68/0x4fa0 drivers/usb/core/hub.c:5913 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 12010: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] dev_new drivers/usb/gadget/legacy/raw_gadget.c:192 [inline] raw_open+0x8b/0x500 drivers/usb/gadget/legacy/raw_gadget.c:434 misc_open+0x35a/0x420 drivers/char/misc.c:179 chrdev_open+0x234/0x6a0 fs/char_dev.c:414 do_dentry_open+0x741/0x1c10 fs/open.c:964 vfs_open+0x82/0x3f0 fs/open.c:1094 do_open fs/namei.c:3887 [inline] path_openat+0x1de4/0x2cb0 fs/namei.c:4046 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 12010: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2380 [inline] slab_free mm/slub.c:4642 [inline] kfree+0x2b4/0x4d0 mm/slub.c:4841 kref_put include/linux/kref.h:65 [inline] raw_release+0x168/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x3ff/0xb70 fs/file_table.c:465 task_work_run+0x150/0x240 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xae2/0x2c70 kernel/exit.c:959 do_group_exit+0xd3/0x2a0 kernel/exit.c:1108 get_signal+0x2673/0x26d0 kernel/signal.c:3034 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888064f0a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2424 bytes inside of freed 4096-byte region [ffff888064f0a000, ffff888064f0b000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64f08 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b443040 ffffea000149da00 dead000000000002 raw: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801b443040 ffffea000149da00 dead000000000002 head: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea000193c201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5951, tgid 5951 (udevd), ts 82327432149, free_ts 82174938248 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1710 prep_new_page mm/page_alloc.c:1718 [inline] get_page_from_freelist+0x135c/0x3950 mm/page_alloc.c:3680 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4970 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2450 [inline] allocate_slab mm/slub.c:2618 [inline] new_slab+0x23b/0x330 mm/slub.c:2672 ___slab_alloc+0xd9c/0x1940 mm/slub.c:3858 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948 __slab_alloc_node mm/slub.c:4023 [inline] slab_alloc_node mm/slub.c:4184 [inline] __do_kmalloc_node mm/slub.c:4326 [inline] __kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339 kmalloc_noprof include/linux/slab.h:909 [inline] tomoyo_realpath_from_path+0xc2/0x6e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x274/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2377 vfs_getattr fs/stat.c:259 [inline] vfs_statx_path fs/stat.c:299 [inline] vfs_statx+0x121/0x3e0 fs/stat.c:356 vfs_fstatat+0x7b/0xf0 fs/stat.c:375 __do_sys_newfstatat+0x97/0x120 fs/stat.c:542 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5939 tgid 5939 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1254 [inline] __free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2717 discard_slab mm/slub.c:2716 [inline] __put_partials+0x16d/0x1c0 mm/slub.c:3185 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4203 alloc_empty_file+0x55/0x1e0 fs/file_table.c:234 alloc_file fs/file_table.c:351 [inline] alloc_file_pseudo+0x13a/0x230 fs/file_table.c:380 sock_alloc_file+0x50/0x210 net/socket.c:470 sock_map_fd net/socket.c:500 [inline] __sys_socket+0x1c0/0x260 net/socket.c:1692 __do_sys_socket net/socket.c:1697 [inline] __se_sys_socket net/socket.c:1695 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1695 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888064f0a800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888064f0a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888064f0a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888064f0a980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888064f0aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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