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Message-ID: <000000000000dd68d0059c74a1db@google.com>
Date: Sat, 18 Jan 2020 18:07:09 -0800
From: syzbot <syzbot+f3e96783d74ee8ea9aa3@...kaller.appspotmail.com>
To: allison@...utok.net, coreteam@...filter.org, davem@...emloft.net,
fw@...len.de, jeremy@...zel.net, kadlec@...filter.org,
kstewart@...uxfoundation.org, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
pablo@...filter.org, syzkaller-bugs@...glegroups.com,
tglx@...utronix.de
Subject: KASAN: slab-out-of-bounds Read in bitmap_ip_add
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@...kaller.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@...glegroups.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
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