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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 63858C32771 for ; Sun, 19 Jan 2020 02:07:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 31C7F2468C for ; Sun, 19 Jan 2020 02:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728709AbgASCHK (ORCPT ); Sat, 18 Jan 2020 21:07:10 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:47064 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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X-Received: by 2002:a92:5cda:: with SMTP id d87mr5409106ilg.100.1579399629333; Sat, 18 Jan 2020 18:07:09 -0800 (PST) Date: Sat, 18 Jan 2020 18:07:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dd68d0059c74a1db@google.com> Subject: KASAN: slab-out-of-bounds Read in bitmap_ip_add From: syzbot To: allison@lohutok.net, coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, jeremy@azazel.net, kadlec@netfilter.org, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; 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: 244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10edfa85e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3 dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=159e60f1e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+f3e96783d74ee8ea9aa3@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ip_do_add net/netfilter/ipset/ip_set_bitmap_ip.c:83 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ip_add+0xdf/0x870 net/netfilter/ipset/ip_set_bitmap_gen.h:136 Read of size 8 at addr ffff888094088c80 by task syz-executor.4/9490 CPU: 1 PID: 9490 Comm: syz-executor.4 Not tainted 5.5.0-rc6-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+0x1fb/0x318 lib/dump_stack.c:118 print_address_description+0x74/0x5c0 mm/kasan/report.c:374 __kasan_report+0x149/0x1c0 mm/kasan/report.c:506 kasan_report+0x26/0x50 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:182 [inline] check_memory_region+0x2b6/0x2f0 mm/kasan/generic.c:192 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] bitmap_ip_do_add net/netfilter/ipset/ip_set_bitmap_ip.c:83 [inline] bitmap_ip_add+0xdf/0x870 net/netfilter/ipset/ip_set_bitmap_gen.h:136 bitmap_ip_uadt+0x6bf/0xa60 net/netfilter/ipset/ip_set_bitmap_ip.c:186 call_ad+0x10a/0x5b0 net/netfilter/ipset/ip_set_core.c:1716 ip_set_ad+0x6a9/0x860 net/netfilter/ipset/ip_set_core.c:1804 ip_set_uadd+0x37/0x50 net/netfilter/ipset/ip_set_core.c:1829 nfnetlink_rcv_msg+0x9ae/0xcd0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1e0/0x1e50 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2c/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2330 ___sys_sendmsg net/socket.c:2384 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2424 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b159 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fddd7876c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fddd78776d4 RCX: 000000000045b159 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008dc R14: 00000000004ca08f R15: 000000000075bf2c Allocated by task 8928: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:513 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x254/0x340 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc+0x21/0x40 include/linux/slab.h:670 ip_set_alloc+0x32/0x60 net/netfilter/ipset/ip_set_core.c:255 init_map_ip net/netfilter/ipset/ip_set_bitmap_ip.c:223 [inline] bitmap_ip_create+0x48b/0xac0 net/netfilter/ipset/ip_set_bitmap_ip.c:327 ip_set_create+0x421/0xfd0 net/netfilter/ipset/ip_set_core.c:1111 nfnetlink_rcv_msg+0x9ae/0xcd0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1e0/0x1e50 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2c/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2330 ___sys_sendmsg net/socket.c:2384 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2424 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8538: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10d/0x220 mm/slab.c:3757 tomoyo_path_perm+0x6ae/0x850 security/tomoyo/file.c:842 tomoyo_inode_getattr+0x1c/0x20 security/tomoyo/tomoyo.c:129 security_inode_getattr+0xc0/0x140 security/security.c:1222 vfs_getattr+0x2a/0x6d0 fs/stat.c:115 vfs_statx fs/stat.c:191 [inline] vfs_stat include/linux/fs.h:3249 [inline] __do_sys_newstat fs/stat.c:341 [inline] __se_sys_newstat+0x95/0x150 fs/stat.c:337 __x64_sys_newstat+0x5b/0x70 fs/stat.c:337 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888094088c80 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff888094088c80, ffff888094088ca0) The buggy address belongs to the page: page:ffffea0002502200 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff888094088fc1 raw: 00fffe0000000200 ffffea00028f8048 ffffea00029d9b88 ffff8880aa8001c0 raw: ffff888094088fc1 ffff888094088000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888094088b80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888094088c00: 00 05 fc fc fc fc fc fc fb fb fb fb fc fc fc fc >ffff888094088c80: 04 fc fc fc fc fc fc fc 00 00 01 fc fc fc fc fc ^ ffff888094088d00: 00 00 03 fc fc fc fc fc fb fb fb fb fc fc fc fc ffff888094088d80: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ================================================================== --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches