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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 44DBFC636CB for ; Sun, 18 Jul 2021 17:15:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2146C611BF for ; Sun, 18 Jul 2021 17:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229953AbhGRRST (ORCPT ); Sun, 18 Jul 2021 13:18:19 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:49800 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229503AbhGRRSS (ORCPT ); Sun, 18 Jul 2021 13:18:18 -0400 Received: by mail-io1-f72.google.com with SMTP id h7-20020a6bb7070000b0290525efa1b760so10576869iof.16 for ; Sun, 18 Jul 2021 10:15:19 -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=0ylX+Fe4kBK9AMfx44Fug+G4y6kYYOntkMQmyvCQt2g=; b=eCCWzb0G1r8sXy4wMShMmt20NQH4SDhj276EiCu9ODEdauBg9Fl41pDxtPjLk/iR/t biWjM9cP4UZ1oQvfehGl+f3W03bLIg4ndSln0s9SnBBlUdVabk3QWkHMZS1qHnGeLZ0I A/ec2+yC9dR++lhzvJjnf/XexEop5JJXhzwQmSl6VMs97cvG/S4aGPuMRRq8ZNQL4fRd Ohz8rusrM2gqrUkatjG+1QhOXoN1hkGeXNji9qpqbzde4Do3U5GKANce054PyFcRXazG tqj/9nKVK1iQJ7ifLlLMWWz7JkEqlr6Cf0FQZp8teTtHqGbuQ3BYZ6/ZWtbyLce/1oim 1Zbg== X-Gm-Message-State: AOAM533or+YHym9QBUwamYv/RL8fBU4Y+M/PfoV9ae6OCyN3OAteTqZT /XAkENzobbM8S+yjIezzbfr/AiY5cSpk5Fv1S7bDr40uypJH X-Google-Smtp-Source: ABdhPJzO3QFIE/clYv4wLziyOWDV43j1iALxW88gigAyDWYgVAtoFx9yxKP3k0KJwDJw2c8XDs7PqVQzS4OF1Mv02/6bkKTyLbtP MIME-Version: 1.0 X-Received: by 2002:a05:6602:2d10:: with SMTP id c16mr15605791iow.40.1626628519616; Sun, 18 Jul 2021 10:15:19 -0700 (PDT) Date: Sun, 18 Jul 2021 10:15:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000017e9a105c768f7a0@google.com> Subject: [syzbot] KASAN: use-after-free Read in tipc_recvmsg From: syzbot To: davem@davemloft.net, devicetree@vger.kernel.org, frowand.list@gmail.com, gregkh@linuxfoundation.org, jmaloy@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, rafael@kernel.org, robh+dt@kernel.org, robh@kernel.org, syzkaller-bugs@googlegroups.com, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: ab0441b4a920 Merge branch 'vmxnet3-version-6' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1744ac6a300000 kernel config: https://syzkaller.appspot.com/x/.config?x=da140227e4f25b17 dashboard link: https://syzkaller.appspot.com/bug?extid=e6741b97d5552f97c24d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13973a74300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17ffc902300000 The issue was bisected to: commit 67a3156453859ceb40dc4448b7a6a99ea0ad27c7 Author: Rob Herring Date: Thu May 27 19:45:47 2021 +0000 of: Merge of_address_to_resource() and of_pci_address_to_resource() implementations bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=129b0438300000 final oops: https://syzkaller.appspot.com/x/report.txt?x=119b0438300000 console output: https://syzkaller.appspot.com/x/log.txt?x=169b0438300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e6741b97d5552f97c24d@syzkaller.appspotmail.com Fixes: 67a315645385 ("of: Merge of_address_to_resource() and of_pci_address_to_resource() implementations") ================================================================== BUG: KASAN: use-after-free in tipc_recvmsg+0xf77/0xf90 net/tipc/socket.c:1979 Read of size 4 at addr ffff8880328cf1c0 by task kworker/u4:0/8 CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: tipc_rcv tipc_conn_recv_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:436 tipc_recvmsg+0xf77/0xf90 net/tipc/socket.c:1979 sock_recvmsg_nosec net/socket.c:943 [inline] sock_recvmsg net/socket.c:961 [inline] sock_recvmsg+0xca/0x110 net/socket.c:957 tipc_conn_rcv_from_sock+0x162/0x2f0 net/tipc/topsrv.c:398 tipc_conn_recv_work+0xeb/0x190 net/tipc/topsrv.c:421 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 8446: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x84/0xa0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2981 [inline] kmem_cache_alloc_node+0x266/0x3e0 mm/slub.c:3017 __alloc_skb+0x20b/0x340 net/core/skbuff.c:414 alloc_skb_fclone include/linux/skbuff.h:1162 [inline] tipc_buf_acquire+0x25/0xe0 net/tipc/msg.c:72 tipc_msg_build+0xf7/0x10a0 net/tipc/msg.c:386 __tipc_sendstream+0x6d0/0x1150 net/tipc/socket.c:1610 tipc_sendstream+0x4c/0x70 net/tipc/socket.c:1541 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 sock_write_iter+0x289/0x3c0 net/socket.c:1056 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write+0x426/0x650 fs/read_write.c:518 vfs_write+0x75a/0xa40 fs/read_write.c:605 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 8: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:229 [inline] slab_free_hook mm/slub.c:1650 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1675 slab_free mm/slub.c:3235 [inline] kmem_cache_free+0x8e/0x5a0 mm/slub.c:3251 kfree_skbmem+0x166/0x1b0 net/core/skbuff.c:709 __kfree_skb net/core/skbuff.c:745 [inline] kfree_skb net/core/skbuff.c:762 [inline] kfree_skb+0x140/0x3f0 net/core/skbuff.c:756 tipc_recvmsg+0x70d/0xf90 net/tipc/socket.c:1977 sock_recvmsg_nosec net/socket.c:943 [inline] sock_recvmsg net/socket.c:961 [inline] sock_recvmsg+0xca/0x110 net/socket.c:957 tipc_conn_rcv_from_sock+0x162/0x2f0 net/tipc/topsrv.c:398 tipc_conn_recv_work+0xeb/0x190 net/tipc/topsrv.c:421 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff8880328cf180 which belongs to the cache skbuff_fclone_cache of size 472 The buggy address is located 64 bytes inside of 472-byte region [ffff8880328cf180, ffff8880328cf358) The buggy address belongs to the page: page:ffffea0000ca3380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x328ce head:ffffea0000ca3380 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000811500 0000000300000003 ffff8881400ee280 raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8424, ts 65082628156, free_ts 64879784131 prep_new_page mm/page_alloc.c:2433 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4166 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5374 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 alloc_slab_page mm/slub.c:1713 [inline] allocate_slab+0x32b/0x4c0 mm/slub.c:1853 new_slab mm/slub.c:1916 [inline] new_slab_objects mm/slub.c:2662 [inline] ___slab_alloc+0x4ba/0x820 mm/slub.c:2825 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2865 slab_alloc_node mm/slub.c:2947 [inline] kmem_cache_alloc_node+0x12c/0x3e0 mm/slub.c:3017 __alloc_skb+0x20b/0x340 net/core/skbuff.c:414 alloc_skb_fclone include/linux/skbuff.h:1162 [inline] sk_stream_alloc_skb+0x109/0xc30 net/ipv4/tcp.c:887 tcp_sendmsg_locked+0xc78/0x2f10 net/ipv4/tcp.c:1309 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1461 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 sock_write_iter+0x289/0x3c0 net/socket.c:1056 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write+0x426/0x650 fs/read_write.c:518 vfs_write+0x75a/0xa40 fs/read_write.c:605 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1343 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1394 free_unref_page_prepare mm/page_alloc.c:3329 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3408 unfreeze_partials+0x17c/0x1d0 mm/slub.c:2443 put_cpu_partial+0x13d/0x230 mm/slub.c:2479 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2981 [inline] slab_alloc mm/slub.c:2989 [inline] kmem_cache_alloc+0x216/0x3a0 mm/slub.c:2994 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags fs/namei.c:2747 [inline] user_path_at_empty+0xa1/0x100 fs/namei.c:2747 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x142/0x390 fs/stat.c:203 vfs_fstatat fs/stat.c:225 [inline] vfs_lstat include/linux/fs.h:3386 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:380 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff8880328cf080: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ffff8880328cf100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880328cf180: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880328cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880328cf280: 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches