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 385B0C433E0 for ; Tue, 16 Feb 2021 00:07:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C65C64DEC for ; Tue, 16 Feb 2021 00:07:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229853AbhBPAHA (ORCPT ); Mon, 15 Feb 2021 19:07:00 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:44086 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229682AbhBPAG5 (ORCPT ); Mon, 15 Feb 2021 19:06:57 -0500 Received: by mail-io1-f69.google.com with SMTP id g16so1358274ioc.11 for ; Mon, 15 Feb 2021 16:06:42 -0800 (PST) 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=ke6XkolkYkZjHLp9yoDdAFVNnSEG85ro5TExHI5SQv8=; b=NWGHuHX7mmvytJ7LMX57dhCM7Uq2LouSKgigkqrrW/8sKk/1oDzoebkzrHkcD1jHKv CIKYcMImWwzwOI4GyyanwkJ2x6w9h2a8C1FlOGmP15WKY5O32up4/Qr6+XA6EsMaeAA6 eWeqExkTspPxMJh+mfeavUoWylsuWBjZdMQqxCMKSktiNC5juXOLJ0cW8U7viivK9VQ8 9APE3QwK8AyE4LFWbnH9B6s1PllXcTTzPirlxQ0NdeF1XHruDNG2Um9Qk0EWfNo/B4hA +VufDK//z05NBz6Dx7No/+Xc/eF0980ylGwwx+H9nNpe2nDp1tYCxFrCM7tX5q0RiJmN IaKw== X-Gm-Message-State: AOAM530PKpItenC+N8i5Xfl/E7QDPbTwzFcnfXfQjRnDNWOBgbJTKvpD hhw+gVuHofRqq/eR4xVJthMBflTLOsW4CUHDM5d2DQg/Cbbs X-Google-Smtp-Source: ABdhPJzP9wSJZ5wha+EWJQs5Xqx1xr3SoFtwtyoBJDmkTxBpbYbGATZXxiLhI1UMc2fA5veZBs5TKZzVJvLxWjfZy2CACMh1OTu6 MIME-Version: 1.0 X-Received: by 2002:a6b:d007:: with SMTP id x7mr14864571ioa.88.1613433976643; Mon, 15 Feb 2021 16:06:16 -0800 (PST) Date: Mon, 15 Feb 2021 16:06:16 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000be4d705bb68dfa7@google.com> Subject: KASAN: invalid-access Write in enqueue_timer From: syzbot To: broonie@kernel.org, catalin.marinas@arm.com, keescook@chromium.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, mbenes@suse.cz, syzkaller-bugs@googlegroups.com, will@kernel.org 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: f40ddce8 Linux 5.11 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1395db28d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=494a8e2d9bf09818 dashboard link: https://syzkaller.appspot.com/bug?extid=95c862be69e37145543f userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+95c862be69e37145543f@syzkaller.appspotmail.com ================================================================== BUG: KASAN: invalid-access in hlist_add_head include/linux/list.h:883 [inline] BUG: KASAN: invalid-access in enqueue_timer+0x18/0xc0 kernel/time/timer.c:581 Write at addr f4ff0000275dcda0 by task kworker/u4:6/2919 Pointer tag: [f4], memory tag: [fe] CPU: 1 PID: 2919 Comm: kworker/u4:6 Not tainted 5.11.0-syzkaller #0 Hardware name: linux,dummy-virt (DT) Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker Call trace: dump_backtrace+0x0/0x1b0 arch/arm64/kernel/stacktrace.c:117 show_stack+0x18/0x70 arch/arm64/kernel/stacktrace.c:196 __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xd0/0x12c lib/dump_stack.c:120 print_address_description+0x70/0x29c mm/kasan/report.c:230 __kasan_report mm/kasan/report.c:396 [inline] kasan_report+0x134/0x380 mm/kasan/report.c:413 report_tag_fault arch/arm64/mm/fault.c:311 [inline] do_tag_recovery arch/arm64/mm/fault.c:325 [inline] __do_kernel_fault+0x178/0x1bc arch/arm64/mm/fault.c:369 do_bad_area arch/arm64/mm/fault.c:462 [inline] do_tag_check_fault+0x74/0x90 arch/arm64/mm/fault.c:717 do_mem_abort+0x44/0xbc arch/arm64/mm/fault.c:793 el1_abort+0x40/0x6c arch/arm64/kernel/entry-common.c:118 el1_sync_handler+0xac/0xd0 arch/arm64/kernel/entry-common.c:209 el1_sync+0x70/0x100 arch/arm64/kernel/entry.S:656 hlist_add_head include/linux/list.h:883 [inline] enqueue_timer+0x18/0xc0 kernel/time/timer.c:581 mod_timer+0x14/0x20 kernel/time/timer.c:1106 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline] wg_timers_any_authenticated_packet_traversal+0x68/0x90 drivers/net/wireguard/timers.c:215 wg_packet_send_handshake_initiation+0xa8/0xe0 drivers/net/wireguard/send.c:36 wg_packet_handshake_send_worker+0x1c/0x34 drivers/net/wireguard/send.c:51 process_one_work+0x1d8/0x360 kernel/workqueue.c:2275 worker_thread+0x70/0x434 kernel/workqueue.c:2421 kthread+0x174/0x180 kernel/kthread.c:292 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958 Allocated by task 6247: stack_trace_save+0x50/0x80 kernel/stacktrace.c:121 kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc+0xe8/0x160 mm/kasan/common.c:429 __kasan_kmalloc+0x14/0x20 mm/kasan/common.c:443 kasan_kmalloc include/linux/kasan.h:219 [inline] __kmalloc_node+0x1d0/0x3ac mm/slub.c:4033 kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x40/0xe0 mm/util.c:587 kvmalloc include/linux/mm.h:781 [inline] kvzalloc include/linux/mm.h:789 [inline] alloc_netdev_mqs+0x5c/0x3bc net/core/dev.c:10546 rtnl_create_link+0xc8/0x2b0 net/core/rtnetlink.c:3171 __rtnl_newlink+0x5bc/0x800 net/core/rtnetlink.c:3433 rtnl_newlink+0x70/0xa0 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x118/0x334 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x5c/0x130 net/netlink/af_netlink.c:2494 rtnetlink_rcv+0x18/0x2c net/core/rtnetlink.c:5571 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x25c/0x320 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x1d4/0x3e4 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x54/0x60 net/socket.c:672 __sys_sendto+0x118/0x14c net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __arm64_sys_sendto+0x2c/0x40 net/socket.c:1983 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall arch/arm64/kernel/syscall.c:49 [inline] el0_svc_common.constprop.0+0x74/0x190 arch/arm64/kernel/syscall.c:159 do_el0_svc+0x74/0x90 arch/arm64/kernel/syscall.c:198 el0_svc+0x14/0x20 arch/arm64/kernel/entry-common.c:365 el0_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:381 el0_sync+0x190/0x1c0 arch/arm64/kernel/entry.S:699 Freed by task 24: stack_trace_save+0x50/0x80 kernel/stacktrace.c:121 kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track+0x28/0x40 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/hw_tags.c:174 ____kasan_slab_free.constprop.0+0x184/0x1c0 mm/kasan/common.c:362 __kasan_slab_free+0x10/0x20 mm/kasan/common.c:369 kasan_slab_free include/linux/kasan.h:192 [inline] slab_free_hook mm/slub.c:1547 [inline] slab_free_freelist_hook+0x98/0x18c mm/slub.c:1580 slab_free mm/slub.c:3143 [inline] kfree+0x324/0x4a0 mm/slub.c:4139 kvfree+0x3c/0x50 mm/util.c:616 netdev_freemem+0x18/0x2c net/core/dev.c:10500 netdev_release+0x30/0x44 net/core/net-sysfs.c:1828 device_release+0x34/0x90 drivers/base/core.c:1980 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x74/0x120 lib/kobject.c:753 netdev_run_todo+0x2d0/0x37c net/core/dev.c:10356 rtnl_unlock+0x10/0x20 net/core/rtnetlink.c:112 default_device_exit_batch+0x168/0x1a0 net/core/dev.c:11220 ops_exit_list+0x64/0x80 net/core/net_namespace.c:190 cleanup_net+0x23c/0x410 net/core/net_namespace.c:604 process_one_work+0x1d8/0x360 kernel/workqueue.c:2275 worker_thread+0x70/0x434 kernel/workqueue.c:2421 kthread+0x174/0x180 kernel/kthread.c:292 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958 The buggy address belongs to the object at ffff0000275dc000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3488 bytes inside of 4096-byte region [ffff0000275dc000, ffff0000275dd000) The buggy address belongs to the page: page:0000000040a3fc39 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf4ff0000275dc000 pfn:0x675d8 head:0000000040a3fc39 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x1ffffc000010200(slab|head) raw: 01ffffc000010200 fffffc00009cb208 fffffc00009ce808 f5ff000004801900 raw: f4ff0000275dc000 0000000000040001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000275dcb00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff0000275dcc00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff0000275dcd00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff0000275dce00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff0000275dcf00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ================================================================== --- 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.