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=-0.7 required=3.0 tests=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 BECECC433E0 for ; Sat, 4 Jul 2020 01:05:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7FB222075D for ; Sat, 4 Jul 2020 01:05:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726669AbgGDBFW (ORCPT ); Fri, 3 Jul 2020 21:05:22 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:39204 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726455AbgGDBFT (ORCPT ); Fri, 3 Jul 2020 21:05:19 -0400 Received: by mail-il1-f197.google.com with SMTP id f66so17448229ilh.6 for ; 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charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 9e50b94b Add linux-next specific files for 20200703 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17667097100000 kernel config: https://syzkaller.appspot.com/x/.config?x=f99cc0faa1476ed6 dashboard link: https://syzkaller.appspot.com/bug?extid=98af0465c818c8b093e9 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16def937100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1324dc83100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+98af0465c818c8b093e9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: out-of-bounds in csd_lock_record+0xcb/0xe0 kernel/smp.c:118 Read of size 8 at addr ffffc90001677830 by task syz-executor014/30713 CPU: 0 PID: 30713 Comm: syz-executor014 Not tainted 5.8.0-rc3-next-20200703-syzkaller #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+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 csd_lock_record+0xcb/0xe0 kernel/smp.c:118 flush_smp_call_function_queue+0x285/0x730 kernel/smp.c:391 __sysvec_call_function_single+0x98/0x490 arch/x86/kernel/smp.c:248 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_call_function_single+0xe0/0x120 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:604 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:151 [inline] RIP: 0010:qlist_free_all+0xfc/0x140 mm/kasan/quarantine.c:167 Code: 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 4c 8b 70 18 e9 40 ff ff ff e8 c3 27 c6 ff 48 83 3d eb 55 01 08 00 74 36 4c 89 ff 57 9d <0f> 1f 44 00 00 4d 85 e4 75 9e 49 c7 45 08 00 00 00 00 49 c7 45 00 RSP: 0018:ffffc90005537ad8 EFLAGS: 00000282 RAX: 0000000000000c29 RBX: ffff888090e0da80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a2fa9780 R13: ffffc90005537b10 R14: ffff8880aa00fc00 R15: 0000000000000282 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:260 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:475 slab_post_alloc_hook mm/slab.h:535 [inline] slab_alloc mm/slab.c:3316 [inline] kmem_cache_alloc+0x148/0x550 mm/slab.c:3486 __d_alloc+0x2a/0x920 fs/dcache.c:1709 d_alloc_pseudo+0x19/0x70 fs/dcache.c:1838 alloc_file_pseudo+0xc6/0x250 fs/file_table.c:226 anon_inode_getfile fs/anon_inodes.c:91 [inline] anon_inode_getfile+0xc8/0x1f0 fs/anon_inodes.c:74 anon_inode_getfd+0x4c/0xa0 fs/anon_inodes.c:136 bpf_map_new_fd kernel/bpf/syscall.c:686 [inline] bpf_map_new_fd kernel/bpf/syscall.c:678 [inline] map_create kernel/bpf/syscall.c:872 [inline] __do_sys_bpf+0xe6d/0x4b10 kernel/bpf/syscall.c:4094 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x447e79 Code: Bad RIP value. RSP: 002b:00007f0e1d49fdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00000000006e39e8 RCX: 0000000000447e79 RDX: 000000000000003c RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00000000006e39e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e39ec R13: 00007fff7cf05b0f R14: 00007f0e1d4a09c0 R15: 0000000000000000 Memory state around the buggy address: ffffc90001677700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90001677780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90001677800: f1 f1 f1 f1 00 00 00 00 f3 f3 f3 f3 00 00 00 00 ^ ffffc90001677880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90001677900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug is generated by a bot. It may contain errors. 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