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KASAN: slab-out-of-bounds Read in bitmap_ipmac_list

Status: fixed on 2020/02/18 14:31
Reported-by: syzbot+190d63957b22ef673ea5@syzkaller.appspotmail.com
Fix commit: 32c72165dbd0 netfilter: ipset: use bitmap infrastructure completely
First crash: 1896d, last: 1881d
Cause bisection: introduced by (bisect log) :
commit ed246cee09b9865145a2e1e34f63ec0e31dd83a5
Author: John Hurley <john.hurley@netronome.com>
Date: Sun Jul 7 14:01:55 2019 +0000

  net: core: move pop MPLS functionality from OvS to core helper

Crash: general protection fault in send_hsr_supervision_frame (log)
Repro: C syz .config
  
▶ ▼ Discussions (8)
Title Replies (including bot) Last reply
[PATCH 4.19 00/92] 4.19.100-stable review 98 (98) 2020/01/31 13:57
[PATCH 4.9 000/271] 4.9.212-stable review 283 (283) 2020/01/29 22:35
[PATCH 5.4 000/104] 5.4.16-stable review 113 (113) 2020/01/29 15:36
[PATCH 4.14 00/46] 4.14.169-stable review 51 (51) 2020/01/29 14:42
[PATCH 4.4 000/183] 4.4.212-stable review 190 (190) 2020/01/29 13:12
[PATCH 0/7] Netfilter fixes for net 9 (9) 2020/01/25 20:40
[PATCH 1/1] netfilter: ipset: use bitmap infrastructure completely 2 (2) 2020/01/20 16:42
KASAN: slab-out-of-bounds Read in bitmap_ipmac_list 0 (2) 2020/01/18 08:36

Sample crash report:
==================================================================
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_ipmac_list+0x635/0x1080 net/netfilter/ipset/ip_set_bitmap_gen.h:222
Read of size 8 at addr ffff88809e669b80 by task syz-executor798/11194

CPU: 0 PID: 11194 Comm: syz-executor798 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+0x197/0x210 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x134/0x1a0 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_ipmac_list+0x635/0x1080 net/netfilter/ipset/ip_set_bitmap_gen.h:222
 ip_set_dump_start+0x96c/0x1ca0 net/netfilter/ipset/ip_set_core.c:1632
 netlink_dump+0x558/0xfb0 net/netlink/af_netlink.c:2244
 __netlink_dump_start+0x66a/0x930 net/netlink/af_netlink.c:2352
 netlink_dump_start include/linux/netlink.h:233 [inline]
 ip_set_dump+0x15a/0x1d0 net/netfilter/ipset/ip_set_core.c:1690
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:659
 ____sys_sendmsg+0x753/0x880 net/socket.c:2330
 ___sys_sendmsg+0x100/0x170 net/socket.c:2384
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg net/socket.c:2424 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4402c9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff2edbf798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402c9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401b50
R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 11194:
 save_stack+0x23/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527
 __do_kmalloc mm/slab.c:3656 [inline]
 __kmalloc+0x163/0x770 mm/slab.c:3665
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:670 [inline]
 ip_set_alloc+0x38/0x5e net/netfilter/ipset/ip_set_core.c:255
 init_map_ipmac net/netfilter/ipset/ip_set_bitmap_ipmac.c:302 [inline]
 bitmap_ipmac_create+0x4e8/0xa00 net/netfilter/ipset/ip_set_bitmap_ipmac.c:365
 ip_set_create+0x6f1/0x1500 net/netfilter/ipset/ip_set_core.c:1111
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:659
 ____sys_sendmsg+0x753/0x880 net/socket.c:2330
 ___sys_sendmsg+0x100/0x170 net/socket.c:2384
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg net/socket.c:2424 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 10967:
 save_stack+0x23/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:335 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10a/0x2c0 mm/slab.c:3757
 tomoyo_check_open_permission+0x19e/0x3e0 security/tomoyo/file.c:786
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0xa9/0xd0 security/tomoyo/tomoyo.c:314
 security_file_open+0x71/0x300 security/security.c:1497
 do_dentry_open+0x37a/0x1380 fs/open.c:784
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3356 [inline]
 path_openat+0x118b/0x3180 fs/namei.c:3473
 do_filp_open+0x1a1/0x280 fs/namei.c:3503
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809e669b80
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff88809e669b80, ffff88809e669ba0)
The buggy address belongs to the page:
page:ffffea0002799a40 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e669fc1
raw: 00fffe0000000200 ffffea00028d5188 ffffea0002a41bc8 ffff8880aa4001c0
raw: ffff88809e669fc1 ffff88809e669000 0000000100000030 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809e669a80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809e669b00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88809e669b80: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
                   ^
 ffff88809e669c00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809e669c80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================

Crashes (108):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/01/20 02:37 upstream 8f8972a3127f 0342f8c7 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2020/01/19 22:26 upstream 8f8972a3127f 0342f8c7 .config console log report syz C ci-upstream-kasan-gce
2020/01/19 13:48 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce-root
2020/01/19 06:37 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce
2020/01/19 05:49 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/01/19 05:11 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2020/01/19 04:06 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce-root
2020/01/18 18:53 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/01/18 17:50 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce-root
2020/01/18 15:10 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce
2020/01/18 14:59 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce-root
2020/01/18 12:03 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/01/18 07:23 upstream ab7541c3addd 3de7aabb .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/01/18 03:19 upstream ab7541c3addd 3de7aabb .config console log report syz C ci-upstream-kasan-gce
2020/01/19 12:12 upstream 244dc2689085 bc8bc756 .config console log report syz C ci-upstream-kasan-gce-386
2020/01/18 20:54 upstream 25e73aadf297 3de7aabb .config console log report syz C ci-upstream-kasan-gce-386
2020/01/18 12:06 upstream ab7541c3addd 3de7aabb .config console log report syz C ci-upstream-kasan-gce-386
2020/01/18 09:47 upstream ab7541c3addd 3de7aabb .config console log report syz C ci-upstream-kasan-gce-386
2020/01/19 11:11 net-old e02d9c4c68dc bc8bc756 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/01/19 02:40 net-old e02d9c4c68dc bc8bc756 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/01/18 21:40 net-old e02d9c4c68dc 3de7aabb .config console log report syz C ci-upstream-net-this-kasan-gce
2020/01/18 20:10 net-old e02d9c4c68dc 3de7aabb .config console log report syz C ci-upstream-net-this-kasan-gce
2020/01/18 13:21 net-next-old 56f200c78ce4 3de7aabb .config console log report syz C ci-upstream-net-kasan-gce
2020/01/18 08:51 net-next-old 56f200c78ce4 3de7aabb .config console log report syz C ci-upstream-net-kasan-gce
2020/01/18 07:18 net-next-old 56f200c78ce4 3de7aabb .config console log report syz C ci-upstream-net-kasan-gce
2020/01/30 18:34 linux-next 2747d5fdab78 5ed23f9a .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2020/01/28 15:01 linux-next 2747d5fdab78 56cd6c9b .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2020/01/27 05:20 linux-next 2747d5fdab78 dd56146d .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2020/01/25 21:19 linux-next 2747d5fdab78 2e95ab33 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2020/01/25 15:38 upstream d5d359b0ac3f 2e95ab33 .config console log report ci-upstream-kasan-gce-selinux-root
2020/01/24 18:11 upstream 4703d9119972 2e95ab33 .config console log report ci-upstream-kasan-gce
2020/01/23 23:15 upstream 4703d9119972 2e95ab33 .config console log report ci-upstream-kasan-gce
2020/01/22 23:37 upstream dbab40bdb42c 3334d684 .config console log report ci-upstream-kasan-gce-root
2020/01/22 22:02 upstream dbab40bdb42c 3334d684 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/21 05:47 upstream d96d875ef5dd 8eda0b95 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/21 00:01 upstream d96d875ef5dd d2557fb5 .config console log report ci-upstream-kasan-gce-selinux-root
2020/01/20 13:37 upstream def9d2780727 d2557fb5 .config console log report ci-upstream-kasan-gce-root
2020/01/20 09:39 upstream def9d2780727 0342f8c7 .config console log report ci-upstream-kasan-gce-selinux-root
2020/01/20 09:37 upstream def9d2780727 0342f8c7 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/19 00:24 upstream 244dc2689085 bc8bc756 .config console log report ci-upstream-kasan-gce-root
2020/01/18 02:19 upstream ab7541c3addd 3de7aabb .config console log report ci-upstream-kasan-gce
2020/01/24 19:57 upstream 6381b442836e 2e95ab33 .config console log report ci-upstream-kasan-gce-386
2020/01/24 12:32 upstream 4703d9119972 2e95ab33 .config console log report ci-upstream-kasan-gce-386
2020/01/23 17:09 upstream 131701c697e8 3334d684 .config console log report ci-upstream-kasan-gce-386
2020/01/23 14:16 upstream 131701c697e8 3334d684 .config console log report ci-upstream-kasan-gce-386
2020/01/21 09:04 upstream d96d875ef5dd 8eda0b95 .config console log report ci-upstream-kasan-gce-386
2020/01/20 14:38 upstream def9d2780727 d2557fb5 .config console log report ci-upstream-kasan-gce-386
2020/01/19 18:10 upstream 8f8972a3127f 0342f8c7 .config console log report ci-upstream-kasan-gce-386
2020/01/19 16:24 upstream 8f8972a3127f 0342f8c7 .config console log report ci-upstream-kasan-gce-386
2020/01/25 08:53 net-old 623c8d5c74c6 2e95ab33 .config console log report ci-upstream-net-this-kasan-gce
2020/01/24 16:14 net-old 623c8d5c74c6 2e95ab33 .config console log report ci-upstream-net-this-kasan-gce
2020/01/22 16:33 net-old d0f418516022 8eda0b95 .config console log report ci-upstream-net-this-kasan-gce
2020/01/22 13:26 net-old d0f418516022 8eda0b95 .config console log report ci-upstream-net-this-kasan-gce
2020/01/22 08:59 net-old d0f418516022 8eda0b95 .config console log report ci-upstream-net-this-kasan-gce
2020/01/21 23:01 net-old d0f418516022 8eda0b95 .config console log report ci-upstream-net-this-kasan-gce
2020/01/21 14:58 net-old 80892772c4ed 8eda0b95 .config console log report ci-upstream-net-this-kasan-gce
2020/01/20 08:40 net-old 7008ee121089 0342f8c7 .config console log report ci-upstream-net-this-kasan-gce
2020/01/20 07:42 net-old 7008ee121089 0342f8c7 .config console log report ci-upstream-net-this-kasan-gce
2020/01/19 16:27 net-old 09d4f10a5e78 0342f8c7 .config console log report ci-upstream-net-this-kasan-gce
2020/01/26 15:40 net-next-old 3333e50b64fe f4e7270e .config console log report ci-upstream-net-kasan-gce
2020/01/26 13:28 net-next-old 3333e50b64fe f4e7270e .config console log report ci-upstream-net-kasan-gce
2020/01/25 05:44 net-next-old 08a45c59f16e 2e95ab33 .config console log report ci-upstream-net-kasan-gce
2020/01/25 03:14 net-next-old 23f4eacdd24a 2e95ab33 .config console log report ci-upstream-net-kasan-gce
2020/01/24 11:31 net-next-old 9bbc8be29d66 2e95ab33 .config console log report ci-upstream-net-kasan-gce
2020/01/24 08:55 net-next-old 9bbc8be29d66 2e95ab33 .config console log report ci-upstream-net-kasan-gce
2020/01/24 08:47 net-next-old 9bbc8be29d66 2e95ab33 .config console log report ci-upstream-net-kasan-gce
2020/01/23 12:38 net-next-old c5d19a6ecfce 3334d684 .config console log report ci-upstream-net-kasan-gce
2020/01/23 10:35 net-next-old c5d19a6ecfce 3334d684 .config console log report ci-upstream-net-kasan-gce
2020/01/23 08:01 net-next-old c5d19a6ecfce 3334d684 .config console log report ci-upstream-net-kasan-gce
2020/01/22 18:40 net-next-old 4f2c17e0f332 8eda0b95 .config console log report ci-upstream-net-kasan-gce
2020/01/22 06:47 net-next-old 4f2c17e0f332 8eda0b95 .config console log report ci-upstream-net-kasan-gce
2020/01/22 06:11 net-next-old 4f2c17e0f332 8eda0b95 .config console log report ci-upstream-net-kasan-gce
2020/01/22 04:34 net-next-old 4f2c17e0f332 8eda0b95 .config console log report ci-upstream-net-kasan-gce
2020/01/21 16:17 net-next-old 17e10a15a796 8eda0b95 .config console log report ci-upstream-net-kasan-gce
2020/01/20 06:53 net-next-old 7f013edebaa4 0342f8c7 .config console log report ci-upstream-net-kasan-gce
2020/01/20 04:52 net-next-old 7f013edebaa4 0342f8c7 .config console log report ci-upstream-net-kasan-gce
2020/01/18 15:24 net-next-old 56f200c78ce4 3de7aabb .config console log report ci-upstream-net-kasan-gce
2020/01/18 14:33 net-next-old 56f200c78ce4 3de7aabb .config console log report ci-upstream-net-kasan-gce
2020/01/18 08:07 net-next-old 56f200c78ce4 3de7aabb .config console log report ci-upstream-net-kasan-gce
2020/02/02 12:56 linux-next 2747d5fdab78 2274ad39 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/02/02 10:55 linux-next 2747d5fdab78 2274ad39 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.