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 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 2FBFDC04FF3 for ; Mon, 24 May 2021 09:12:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 140B260FE7 for ; Mon, 24 May 2021 09:12:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232504AbhEXJN6 (ORCPT ); Mon, 24 May 2021 05:13:58 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:46929 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232313AbhEXJNx (ORCPT 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1.0 X-Received: by 2002:a92:b07:: with SMTP id b7mr13108882ilf.268.1621847545850; Mon, 24 May 2021 02:12:25 -0700 (PDT) Date: Mon, 24 May 2021 02:12:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d9b3aa05c30fce61@google.com> Subject: [syzbot] KASAN: use-after-free Read in dump_schedule (2) From: syzbot To: davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, leandro.maciel.dorileo@intel.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, vedang.patel@intel.com, xiyou.wangcong@gmail.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: f5120f59 dpaa2-eth: don't print error from dpaa2_mac_conne.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1582989dd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=7b1a53f9a0b5a801 dashboard link: https://syzkaller.appspot.com/bug?extid=a6e609c672ce997c14a8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11924417d00000 The issue was bisected to: commit 7b9eba7ba0c1b24df42b70b62d154b284befbccf Author: Leandro Dorileo Date: Mon Apr 8 17:12:17 2019 +0000 net/sched: taprio: fix picos_per_byte miscalculation bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1261f09dd00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1161f09dd00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1661f09dd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a6e609c672ce997c14a8@syzkaller.appspotmail.com Fixes: 7b9eba7ba0c1 ("net/sched: taprio: fix picos_per_byte miscalculation") ================================================================== BUG: KASAN: use-after-free in dump_schedule+0x758/0x7d0 net/sched/sch_taprio.c:1837 Read of size 8 at addr ffff888043cca140 by task syz-executor.5/9214 CPU: 1 PID: 9214 Comm: syz-executor.5 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436 dump_schedule+0x758/0x7d0 net/sched/sch_taprio.c:1837 taprio_dump+0x591/0xd80 net/sched/sch_taprio.c:1906 tc_fill_qdisc+0x60e/0x12a0 net/sched/sch_api.c:917 qdisc_notify.isra.0+0x2b1/0x310 net/sched/sch_api.c:984 tc_modify_qdisc+0xf54/0x1a50 net/sched/sch_api.c:1636 rtnetlink_rcv_msg+0x44e/0xb70 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fba2214b188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcc845827f R14: 00007fba2214b300 R15: 0000000000022000 Allocated by task 9193: 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:428 [inline] ____kasan_kmalloc mm/kasan/common.c:507 [inline] ____kasan_kmalloc mm/kasan/common.c:466 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:516 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:686 [inline] taprio_change+0x5fb/0x4030 net/sched/sch_taprio.c:1477 qdisc_change net/sched/sch_api.c:1332 [inline] tc_modify_qdisc+0xd50/0x1a50 net/sched/sch_api.c:1634 rtnetlink_rcv_msg+0x44e/0xb70 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 9201: 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:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1581 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1606 slab_free mm/slub.c:3166 [inline] kfree+0xe5/0x7f0 mm/slub.c:4225 rcu_do_batch kernel/rcu/tree.c:2558 [inline] rcu_core+0x7ab/0x13b0 kernel/rcu/tree.c:2793 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 Last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 __call_rcu kernel/rcu/tree.c:3038 [inline] call_rcu+0xb1/0x750 kernel/rcu/tree.c:3113 taprio_change+0x2e82/0x4030 net/sched/sch_taprio.c:1595 qdisc_change net/sched/sch_api.c:1332 [inline] tc_modify_qdisc+0xd50/0x1a50 net/sched/sch_api.c:1634 rtnetlink_rcv_msg+0x44e/0xb70 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Second to last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 __call_rcu kernel/rcu/tree.c:3038 [inline] call_rcu+0xb1/0x750 kernel/rcu/tree.c:3113 taprio_change+0x2e82/0x4030 net/sched/sch_taprio.c:1595 qdisc_change net/sched/sch_api.c:1332 [inline] tc_modify_qdisc+0xd50/0x1a50 net/sched/sch_api.c:1634 rtnetlink_rcv_msg+0x44e/0xb70 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888043cca100 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 64 bytes inside of 96-byte region [ffff888043cca100, ffff888043cca160) The buggy address belongs to the page: page:ffffea00010f3280 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43cca flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000886b00 0000001600000016 ffff888011041780 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 8489, ts 1045116260415, free_ts 0 prep_new_page mm/page_alloc.c:2358 [inline] get_page_from_freelist+0x1033/0x2b60 mm/page_alloc.c:3994 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1644 [inline] allocate_slab+0x2c5/0x4c0 mm/slub.c:1784 new_slab mm/slub.c:1847 [inline] new_slab_objects mm/slub.c:2593 [inline] ___slab_alloc+0x44c/0x7a0 mm/slub.c:2756 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2796 slab_alloc_node mm/slub.c:2878 [inline] slab_alloc mm/slub.c:2920 [inline] __kmalloc+0x315/0x330 mm/slub.c:4063 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:686 [inline] tomoyo_commit_ok+0x1e/0x90 security/tomoyo/memory.c:76 tomoyo_update_domain+0x5de/0x850 security/tomoyo/domain.c:139 tomoyo_update_path_number_acl security/tomoyo/file.c:691 [inline] tomoyo_write_file+0x68b/0x7f0 security/tomoyo/file.c:1034 tomoyo_write_domain2+0x116/0x1d0 security/tomoyo/common.c:1152 tomoyo_add_entry security/tomoyo/common.c:2042 [inline] tomoyo_supervisor+0xbc9/0xf00 security/tomoyo/common.c:2103 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x419/0x590 security/tomoyo/file.c:734 security_file_ioctl+0x50/0xb0 security/security.c:1539 __do_sys_ioctl fs/ioctl.c:1063 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:1055 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 page_owner free stack trace missing Memory state around the buggy address: ffff888043cca000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888043cca080: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff888043cca100: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888043cca180: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888043cca200: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ================================================================== --- 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