From: syzbot <syzbot+b96275fd6ad891076ced@syzkaller.appspotmail.com>
To: coreteam@netfilter.org, davem@davemloft.net,
florent.fourcot@wifirst.fr, fw@strlen.de, jeremy@azazel.net,
johannes.berg@intel.com, kadlec@netfilter.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, pablo@netfilter.org,
syzkaller-bugs@googlegroups.com
Subject: KASAN: slab-out-of-bounds Read in bitmap_port_destroy
Date: Thu, 23 Jan 2020 15:17:09 -0800 [thread overview]
Message-ID: <000000000000204b4d059cd6d766@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 131701c6 Merge tag 'leds-5.5-rc8' of git://git.kernel.org/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11897a11e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153
dashboard link: https://syzkaller.appspot.com/bug?extid=b96275fd6ad891076ced
compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fba721e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1339726ee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+b96275fd6ad891076ced@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_port_ext_cleanup net/netfilter/ipset/ip_set_bitmap_gen.h:51 [inline]
BUG: KASAN: slab-out-of-bounds in bitmap_port_destroy+0x1d2/0x3c0 net/netfilter/ipset/ip_set_bitmap_gen.h:64
Read of size 8 at addr ffff88809e7c2080 by task syz-executor377/8828
CPU: 1 PID: 8828 Comm: syz-executor377 Not tainted 5.5.0-rc7-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_port_ext_cleanup net/netfilter/ipset/ip_set_bitmap_gen.h:51 [inline]
bitmap_port_destroy+0x1d2/0x3c0 net/netfilter/ipset/ip_set_bitmap_gen.h:64
ip_set_create+0xae0/0xfd0 net/netfilter/ipset/ip_set_core.c:1165
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: 0033:0x441399
Code: e8 fc ab 02 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc59587e48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441399
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 0000000000011f0f R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021c0
R13: 0000000000402250 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 8828:
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_port net/netfilter/ipset/ip_set_bitmap_port.c:234 [inline]
bitmap_port_create+0x32c/0x790 net/netfilter/ipset/ip_set_bitmap_port.c:276
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 8498:
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
single_release+0x91/0xa0 fs/seq_file.c:609
__fput+0x2e4/0x740 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:313
task_work_run+0x176/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195
syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff88809e7c2080
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff88809e7c2080, ffff88809e7c20a0)
The buggy address belongs to the page:
page:ffffea000279f080 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff88809e7c2fc1
raw: 00fffe0000000200 ffffea00028b5b08 ffffea0002a03b48 ffff8880aa8001c0
raw: ffff88809e7c2fc1 ffff88809e7c2000 000000010000003d 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809e7c1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88809e7c2000: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc
>ffff88809e7c2080: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
^
ffff88809e7c2100: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
ffff88809e7c2180: 00 00 01 fc fc fc fc fc 00 03 fc 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
next reply other threads:[~2020-01-23 23:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 23:17 syzbot [this message]
2020-01-24 4:55 ` KASAN: slab-out-of-bounds Read in bitmap_port_destroy syzbot
2020-03-14 13:10 ` syzbot
[not found] <20200124085521.12504-1-hdanton@sina.com>
2020-01-24 9:11 ` Dan Carpenter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000204b4d059cd6d766@google.com \
--to=syzbot+b96275fd6ad891076ced@syzkaller.appspotmail.com \
--cc=coreteam@netfilter.org \
--cc=davem@davemloft.net \
--cc=florent.fourcot@wifirst.fr \
--cc=fw@strlen.de \
--cc=jeremy@azazel.net \
--cc=johannes.berg@intel.com \
--cc=kadlec@netfilter.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pablo@netfilter.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.