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=-0.4 required=3.0 tests=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 92E12C5B578 for ; Mon, 8 Jul 2019 07:17:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AB0020665 for ; Mon, 8 Jul 2019 07:17:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729390AbfGHHRI (ORCPT ); Mon, 8 Jul 2019 03:17:08 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:55332 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725905AbfGHHRI 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2002:a5d:8747:: with SMTP id k7mr16963614iol.20.1562570227370; Mon, 08 Jul 2019 00:17:07 -0700 (PDT) Date: Mon, 08 Jul 2019 00:17:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000056d70a058d263bbc@google.com> Subject: general protection fault in send_hsr_supervision_frame From: syzbot To: arvid.brodin@alten.se, davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 537de0c8 ipv4: Fix NULL pointer dereference in ipv4_neigh_.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=16d2af63a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=90f5d2d9c1e7421c dashboard link: https://syzkaller.appspot.com/bug?extid=097ef84cdc95843fbaa8 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a9361da00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10a4c753a00000 The bug was bisected to: commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 Author: Cong Wang Date: Thu Jul 4 00:21:13 2019 +0000 hsr: implement dellink to clean up resources bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10b86c77a00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=12b86c77a00000 console output: https://syzkaller.appspot.com/x/log.txt?x=14b86c77a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+097ef84cdc95843fbaa8@syzkaller.appspotmail.com Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources") kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10432 Comm: syz-executor357 Not tainted 5.2.0-rc6+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:send_hsr_supervision_frame+0x38/0xf20 net/hsr/hsr_device.c:255 Code: 89 fd 41 54 53 48 83 ec 50 89 75 bc e8 81 d2 5c fa 49 8d 45 10 48 89 c2 48 89 45 d0 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff8880ae809c50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871403d7 RDX: 0000000000000002 RSI: ffffffff8713f08f RDI: 0000000000000000 RBP: ffff8880ae809cc8 R08: ffff88809e014600 R09: ffffed1015d06c70 R10: ffffed1015d06c6f R11: ffff8880ae83637b R12: ffff888097eff000 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f85a5cd2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006de0a0 CR3: 00000000a1151000 CR4: 00000000001406f0 Call Trace: hsr_announce+0x12f/0x3b0 net/hsr/hsr_device.c:339 call_timer_fn+0x193/0x720 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698 __do_softirq+0x25c/0x94c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:lock_is_held_type+0x272/0x320 kernel/locking/lockdep.c:4343 Code: ff df c7 83 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 88 00 00 00 48 83 3d 86 a0 5b 07 00 74 31 48 8b 7d c0 57 9d <0f> 1f 44 00 00 48 83 c4 20 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d RSP: 0018:ffff8880a13f71e8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1164e7e RBX: ffff88809e014600 RCX: ffff88809e014e80 RDX: dffffc0000000000 RSI: ffffffff88ba3700 RDI: 0000000000000286 RBP: ffff8880a13f7230 R08: ffff88809e014600 R09: ffffed1015d06c70 R10: ffffed1015d06c6f R11: ffff8880ae83637b R12: 0000000000000001 R13: ffff88809e014ef8 R14: ffffffff88ba3700 R15: 0000000000000003 lock_is_held include/linux/lockdep.h:356 [inline] rcu_read_lock_held kernel/rcu/update.c:270 [inline] rcu_read_lock_held+0xa3/0xd0 kernel/rcu/update.c:262 xa_head include/linux/xarray.h:1128 [inline] xas_start+0x1ce/0x560 lib/xarray.c:187 xas_load+0x21/0x150 lib/xarray.c:232 find_get_entry+0x144/0x770 mm/filemap.c:1506 pagecache_get_page+0x4c/0x850 mm/filemap.c:1608 find_get_page_flags include/linux/pagemap.h:266 [inline] ext4_mb_load_buddy_gfp+0x595/0x13e0 fs/ext4/mballoc.c:1190 ext4_mb_load_buddy fs/ext4/mballoc.c:1241 [inline] ext4_mb_regular_allocator+0x7e0/0x1260 fs/ext4/mballoc.c:2190 ext4_mb_new_blocks+0x1881/0x3c10 fs/ext4/mballoc.c:4539 ext4_ext_map_blocks+0x2b83/0x5250 fs/ext4/extents.c:4414 ext4_map_blocks+0x8c5/0x18e0 fs/ext4/inode.c:640 ext4_alloc_file_blocks+0x287/0xac0 fs/ext4/extents.c:4603 ext4_fallocate+0x8ba/0x2060 fs/ext4/extents.c:4888 vfs_fallocate+0x4aa/0xa50 fs/open.c:309 ioctl_preallocate+0x197/0x210 fs/ioctl.c:490 file_ioctl fs/ioctl.c:506 [inline] do_vfs_ioctl+0x1170/0x1380 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x448e19 Code: e8 dc e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 7b 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f85a5cd1d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006e5a08 RCX: 0000000000448e19 RDX: 0000000020000080 RSI: 0000000040305828 RDI: 0000000000000003 RBP: 00000000006e5a00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e5a0c R13: f4a25a5f72695f65 R14: 6761000000000000 R15: 00046c7465677568 Modules linked in: ---[ end trace 1a213132b72d6860 ]--- RIP: 0010:send_hsr_supervision_frame+0x38/0xf20 net/hsr/hsr_device.c:255 Code: 89 fd 41 54 53 48 83 ec 50 89 75 bc e8 81 d2 5c fa 49 8d 45 10 48 89 c2 48 89 45 d0 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff8880ae809c50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871403d7 RDX: 0000000000000002 RSI: ffffffff8713f08f RDI: 0000000000000000 RBP: ffff8880ae809cc8 R08: ffff88809e014600 R09: ffffed1015d06c70 R10: ffffed1015d06c6f R11: ffff8880ae83637b R12: ffff888097eff000 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f85a5cd2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006de0a0 CR3: 00000000a1151000 CR4: 00000000001406f0 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches