* KASAN: slab-out-of-bounds Read in bitmap_ip_add
@ 2020-01-19 2:07 syzbot
2020-01-27 4:01 ` syzbot
2020-03-22 18:02 ` syzbot
0 siblings, 2 replies; 6+ messages in thread
From: syzbot @ 2020-01-19 2:07 UTC (permalink / raw)
To: allison, coreteam, davem, fw, jeremy, kadlec, kstewart,
linux-kernel, netdev, netfilter-devel, pablo, syzkaller-bugs,
tglx
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
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add
2020-01-19 2:07 KASAN: slab-out-of-bounds Read in bitmap_ip_add syzbot
@ 2020-01-27 4:01 ` syzbot
2020-01-31 20:57 ` Linus Torvalds
2020-03-22 18:02 ` syzbot
1 sibling, 1 reply; 6+ messages in thread
From: syzbot @ 2020-01-27 4:01 UTC (permalink / raw)
To: akpm, allison, aryabinin, coreteam, davem, elver, fw, gregkh,
info, jeremy, kadlec, kstewart, linux-kernel, mark.rutland,
netdev, netfilter-devel, pablo, syzkaller-bugs, tglx, torvalds
syzbot has bisected this bug to:
commit 751ad98d5f881df91ba47e013b82422912381e8e
Author: Marco Elver <elver@google.com>
Date: Fri Jul 12 03:54:00 2019 +0000
asm-generic, x86: add bitops instrumentation for KASAN
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1287db66e00000
start commit: 244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=1187db66e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1687db66e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1104c495e00000
Reported-by: syzbot+f3e96783d74ee8ea9aa3@syzkaller.appspotmail.com
Fixes: 751ad98d5f88 ("asm-generic, x86: add bitops instrumentation for KASAN")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add
2020-01-27 4:01 ` syzbot
@ 2020-01-31 20:57 ` Linus Torvalds
2020-01-31 21:02 ` Cong Wang
0 siblings, 1 reply; 6+ messages in thread
From: Linus Torvalds @ 2020-01-31 20:57 UTC (permalink / raw)
To: Jozsef Kadlecsik
Cc: coreteam, David Miller, Marco Elver, Florian Westphal,
Greg Kroah-Hartman, Enrico Weigelt, metux IT consult, jeremy,
Kate Stewart, Linux Kernel Mailing List, Mark Rutland, Netdev,
netfilter-devel, Pablo Neira Ayuso, syzkaller-bugs,
Thomas Gleixner
On Sun, Jan 26, 2020 at 8:01 PM syzbot
<syzbot+f3e96783d74ee8ea9aa3@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
Ok, the bisection is obviously bogus - it just points to where the
KASAN support was added to _notice_ the problem.
But is somebody looking at the actual KASAN report itself?
https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
It does look like nfnetlink_rcv_msg() ends up looking at a bit:
bitmap_ip_do_add net/netfilter/ipset/ip_set_bitmap_ip.c:83 [inline]
bitmap_ip_add+0xef/0xe60 net/netfilter/ipset/ip_set_bitmap_gen.h:136
bitmap_ip_uadt+0x73e/0xa10 net/netfilter/ipset/ip_set_bitmap_ip.c:186
call_ad+0x1a0/0x5a0 net/netfilter/ipset/ip_set_core.c:1716
ip_set_ad.isra.0+0x572/0xb20 net/netfilter/ipset/ip_set_core.c:1804
ip_set_uadd+0x37/0x50 net/netfilter/ipset/ip_set_core.c:1829
nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
that is past the allocation:
ip_set_alloc+0x38/0x5e net/netfilter/ipset/ip_set_core.c:255
init_map_ip net/netfilter/ipset/ip_set_bitmap_ip.c:223 [inline]
bitmap_ip_create+0x6ec/0xc20 net/netfilter/ipset/ip_set_bitmap_ip.c:327
ip_set_create+0x6f1/0x1500 net/netfilter/ipset/ip_set_core.c:1111
nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
Maybe this has already been fixed, but I'm just trying to follow-up on
the syzbot report..
Linus
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add
2020-01-31 20:57 ` Linus Torvalds
@ 2020-01-31 21:02 ` Cong Wang
2020-01-31 21:06 ` Linus Torvalds
0 siblings, 1 reply; 6+ messages in thread
From: Cong Wang @ 2020-01-31 21:02 UTC (permalink / raw)
To: Linus Torvalds
Cc: Jozsef Kadlecsik, coreteam, David Miller, Marco Elver,
Florian Westphal, Greg Kroah-Hartman, Enrico Weigelt,
metux IT consult, jeremy, Kate Stewart,
Linux Kernel Mailing List, Mark Rutland, Netdev, NetFilter,
Pablo Neira Ayuso, syzkaller-bugs, Thomas Gleixner
On Fri, Jan 31, 2020 at 12:58 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Sun, Jan 26, 2020 at 8:01 PM syzbot
> <syzbot+f3e96783d74ee8ea9aa3@syzkaller.appspotmail.com> wrote:
> >
> > syzbot has bisected this bug to:
>
> Ok, the bisection is obviously bogus - it just points to where the
> KASAN support was added to _notice_ the problem.
>
> But is somebody looking at the actual KASAN report itself?
It is supposed to be fixed by:
commit 32c72165dbd0e246e69d16a3ad348a4851afd415
Author: Kadlecsik József <kadlec@blackhole.kfki.hu>
Date: Sun Jan 19 22:06:49 2020 +0100
netfilter: ipset: use bitmap infrastructure completely
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add
2020-01-31 21:02 ` Cong Wang
@ 2020-01-31 21:06 ` Linus Torvalds
0 siblings, 0 replies; 6+ messages in thread
From: Linus Torvalds @ 2020-01-31 21:06 UTC (permalink / raw)
To: Cong Wang
Cc: Jozsef Kadlecsik, coreteam, David Miller, Marco Elver,
Florian Westphal, Greg Kroah-Hartman, Enrico Weigelt,
metux IT consult, jeremy, Kate Stewart,
Linux Kernel Mailing List, Mark Rutland, Netdev, NetFilter,
Pablo Neira Ayuso, syzkaller-bugs, Thomas Gleixner
On Fri, Jan 31, 2020 at 1:02 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
>
> It is supposed to be fixed by commit 32c72165dbd0
Ahh, thanks, I missed that. I actually looked at the current code and
saw the bitmap_zalloc() and it all looked fine, and assumed there was
some other bug in the elements calculation.
I didn't realize that it looked fine because it had already been fixed.
Thanks,
Linus
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add
2020-01-19 2:07 KASAN: slab-out-of-bounds Read in bitmap_ip_add syzbot
2020-01-27 4:01 ` syzbot
@ 2020-03-22 18:02 ` syzbot
1 sibling, 0 replies; 6+ messages in thread
From: syzbot @ 2020-03-22 18:02 UTC (permalink / raw)
To: akpm, allison, aryabinin, coreteam, davem, elver, fw, gregkh,
info, jeremy, kadlec, kadlec, kstewart, linux-kernel,
mark.rutland, netdev, netfilter-devel, pablo, syzkaller-bugs,
tglx, torvalds
syzbot suspects this bug was fixed by commit:
commit 32c72165dbd0e246e69d16a3ad348a4851afd415
Author: Kadlecsik József <kadlec@blackhole.kfki.hu>
Date: Sun Jan 19 21:06:49 2020 +0000
netfilter: ipset: use bitmap infrastructure completely
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13c6cb73e00000
start commit: 244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1104c495e00000
If the result looks correct, please mark the bug fixed by replying with:
#syz fix: netfilter: ipset: use bitmap infrastructure completely
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-03-22 18:02 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-01-19 2:07 KASAN: slab-out-of-bounds Read in bitmap_ip_add syzbot
2020-01-27 4:01 ` syzbot
2020-01-31 20:57 ` Linus Torvalds
2020-01-31 21:02 ` Cong Wang
2020-01-31 21:06 ` Linus Torvalds
2020-03-22 18:02 ` syzbot
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