From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0FB66C3A5A6 for ; Mon, 23 Sep 2019 14:31:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E332821783 for ; Mon, 23 Sep 2019 14:31:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439909AbfIWObK (ORCPT ); Mon, 23 Sep 2019 10:31:10 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:41261 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2439850AbfIWObJ (ORCPT ); Mon, 23 Sep 2019 10:31:09 -0400 Received: by mail-io1-f69.google.com with SMTP id q18so1403879ios.8 for ; Mon, 23 Sep 2019 07:31:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=IjRWi0jZFV58CzEU6Vz96oJ3ckiiGtQva6OmGGp82do=; b=WrKAiteRfS/b5gQwge3b4/B5p/ab0yNGfus2fyj6D5kLjJbDjvtKihdqm7QRD19AUV WCHkL6bWl1dixS/wZZgitP1ihoOK9tAvqPOBFa17a8VwO1TiXWeu4YxtDuzbgoir5b55 vycUHhlUSfrP6Mm0OW6Z4U9CEdoMW3PZGAuuPRTVOVzlyfaM4WwSJGlwr5ygVxD4YhCt 2x90ls+BQv406XisFmdygRZyVj1y8mq60khux+sMQ1n2pLjqhNVoJG9DbVFgyHVUcVrZ UGND2jXCmTX3NjrzjJlmpbgTc7o7vqhGPPKzKMdMrDrgoBbbmhnz2IpKffbwLzFQG/6l EmtA== X-Gm-Message-State: APjAAAURMu2bUWdtE44HwjbeM5LJus/If9wOu/CGhBubTQskApF2l/lr WNHjwMryaa8PPqZMa1SxglJw+Fvn4ZAlBkfv517AZH1RLVFJ X-Google-Smtp-Source: APXvYqyN5oPKaKaKyB9gLvZTbrJM10JGjoZQ7SBJTkcl1Lp0zhZp1sKCMx4gbu74vwXRFFbxm4WmIBHgzuizw49MC+Cr7hIkXc8s MIME-Version: 1.0 X-Received: by 2002:a02:5ec4:: with SMTP id h187mr36416109jab.101.1569249069062; Mon, 23 Sep 2019 07:31:09 -0700 (PDT) Date: Mon, 23 Sep 2019 07:31:09 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000005365ff0593394532@google.com> Subject: KASAN: use-after-free Read in xpad_play_effect From: syzbot To: aicommander@gmail.com, andreyknvl@google.com, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, ramzeto@gmail.com, rfontana@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tom@steelseries.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: e0bd8d79 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=14aeeab1600000 kernel config: https://syzkaller.appspot.com/x/.config?x=8847e5384a16f66a dashboard link: https://syzkaller.appspot.com/bug?extid=bea56e0be9fb9106bcf3 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+bea56e0be9fb9106bcf3@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3377/0x3eb0 kernel/locking/lockdep.c:3828 Read of size 8 at addr ffff8881ceebdc10 by task syz-executor.4/7298 CPU: 0 PID: 7298 Comm: syz-executor.4 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:618 __lock_acquire+0x3377/0x3eb0 kernel/locking/lockdep.c:3828 lock_acquire+0x127/0x320 kernel/locking/lockdep.c:4487 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x32/0x50 kernel/locking/spinlock.c:159 xpad_play_effect+0xfe/0xc50 drivers/input/joystick/xpad.c:1225 ml_play_effects+0x817/0x1270 drivers/input/ff-memless.c:398 ml_ff_playback+0x285/0x3d0 drivers/input/ff-memless.c:460 input_ff_event+0x13a/0x2e0 drivers/input/ff-core.c:286 input_handle_event+0x64e/0x1330 drivers/input/input.c:374 input_inject_event+0x30a/0x323 drivers/input/input.c:462 evdev_write+0x2c9/0x410 drivers/input/evdev.c:561 __vfs_write+0x76/0x100 fs/read_write.c:494 vfs_write+0x262/0x5c0 fs/read_write.c:558 ksys_write+0x1e8/0x250 fs/read_write.c:611 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a09 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f53d068cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a09 RDX: 0000000000000364 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53d068d6d4 R13: 00000000004c9bfc R14: 00000000004e1480 R15: 00000000ffffffff Allocated by task 6364: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:493 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:466 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc_node mm/slub.c:2770 [inline] __kmalloc_node_track_caller+0xfc/0x3d0 mm/slub.c:4365 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:141 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:209 alloc_skb include/linux/skbuff.h:1049 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1174 [inline] netlink_sendmsg+0x8cd/0xcc0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0xec/0x1b0 net/socket.c:2356 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6364: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:455 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 skb_free_head+0x8b/0xa0 net/core/skbuff.c:591 skb_release_data+0x41f/0x7c0 net/core/skbuff.c:611 skb_release_all+0x46/0x60 net/core/skbuff.c:665 __kfree_skb net/core/skbuff.c:679 [inline] consume_skb net/core/skbuff.c:838 [inline] consume_skb+0xd9/0x320 net/core/skbuff.c:832 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x4d7/0x690 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x802/0xcc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0xec/0x1b0 net/socket.c:2356 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881ceebdb00 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of 1024-byte region [ffff8881ceebdb00, ffff8881ceebdf00) The buggy address belongs to the page: page:ffffea00073baf00 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 0000000000000000 0000000100000001 ffff8881da002280 raw: 0000000000000000 00000000000e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ceebdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ceebdb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881ceebdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881ceebdc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ceebdd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.