* KASAN: slab-out-of-bounds Read in ip6_tnl_parse_tlv_enc_lim
@ 2018-09-17 21:23 syzbot
2019-11-18 11:35 ` syzbot
2019-12-10 22:08 ` syzbot
0 siblings, 2 replies; 6+ messages in thread
From: syzbot @ 2018-09-17 21:23 UTC (permalink / raw)
To: davem, kuznet, linux-kernel, netdev, syzkaller-bugs, yoshfuji
Hello,
syzbot found the following crash on:
HEAD commit: 3a5af36b6d0e Merge tag '4.19-rc3-smb3-cifs' of git://git.s..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15c727be400000
kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+68dce7caebd8543121de@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
==================================================================
BUG: KASAN: slab-out-of-bounds in ip6_tnl_parse_tlv_enc_lim+0x5df/0x660
net/ipv6/ip6_tunnel.c:417
Read of size 1 at addr ffff8801d21187c7 by task syz-executor281/5345
CPU: 1 PID: 5345 Comm: syz-executor281 Not tainted 4.19.0-rc3+ #238
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+0x1c4/0x2b4 lib/dump_stack.c:113
print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
__asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
ip6_tnl_parse_tlv_enc_lim+0x5df/0x660 net/ipv6/ip6_tunnel.c:417
ip6ip6_tnl_xmit net/ipv6/ip6_tunnel.c:1339 [inline]
ip6_tnl_start_xmit+0x3e2/0x2370 net/ipv6/ip6_tunnel.c:1403
__netdev_start_xmit include/linux/netdevice.h:4287 [inline]
netdev_start_xmit include/linux/netdevice.h:4296 [inline]
xmit_one net/core/dev.c:3216 [inline]
dev_hard_start_xmit+0x27f/0xc70 net/core/dev.c:3232
__dev_queue_xmit+0x2f3b/0x3980 net/core/dev.c:3802
dev_queue_xmit+0x17/0x20 net/core/dev.c:3835
__bpf_tx_skb net/core/filter.c:2012 [inline]
__bpf_redirect_common net/core/filter.c:2050 [inline]
__bpf_redirect+0x5cf/0xb20 net/core/filter.c:2057
____bpf_clone_redirect net/core/filter.c:2090 [inline]
bpf_clone_redirect+0x2f6/0x490 net/core/filter.c:2062
bpf_prog_759a992c578a3894+0x741/0x1000
Allocated by task 5345:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
__do_kmalloc_node mm/slab.c:3682 [inline]
__kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696
__kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137
pskb_expand_head+0x230/0x10f0 net/core/skbuff.c:1460
skb_ensure_writable+0x3dd/0x640 net/core/skbuff.c:5126
__bpf_try_make_writable net/core/filter.c:1633 [inline]
bpf_try_make_writable net/core/filter.c:1639 [inline]
bpf_try_make_head_writable net/core/filter.c:1647 [inline]
____bpf_clone_redirect net/core/filter.c:2084 [inline]
bpf_clone_redirect+0x14a/0x490 net/core/filter.c:2062
bpf_prog_759a992c578a3894+0x741/0x1000
Freed by task 3895:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3498 [inline]
kfree+0xcf/0x230 mm/slab.c:3813
load_elf_binary+0x25b4/0x5620 fs/binfmt_elf.c:1118
search_binary_handler+0x17d/0x570 fs/exec.c:1653
exec_binprm fs/exec.c:1695 [inline]
__do_execve_file.isra.33+0x162f/0x2540 fs/exec.c:1819
do_execveat_common fs/exec.c:1866 [inline]
do_execve fs/exec.c:1883 [inline]
__do_sys_execve fs/exec.c:1964 [inline]
__se_sys_execve fs/exec.c:1959 [inline]
__x64_sys_execve+0x8f/0xc0 fs/exec.c:1959
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8801d21185c0
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 7 bytes to the right of
512-byte region [ffff8801d21185c0, ffff8801d21187c0)
The buggy address belongs to the page:
page:ffffea0007484600 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0007484008 ffffea0007487e88 ffff8801da800940
raw: 0000000000000000 ffff8801d21180c0 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801d2118680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8801d2118700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff8801d2118780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
^
ffff8801d2118800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
ffff8801d2118880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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#bug-status-tracking 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 ip6_tnl_parse_tlv_enc_lim
2018-09-17 21:23 KASAN: slab-out-of-bounds Read in ip6_tnl_parse_tlv_enc_lim syzbot
@ 2019-11-18 11:35 ` syzbot
2019-12-10 22:08 ` syzbot
1 sibling, 0 replies; 6+ messages in thread
From: syzbot @ 2019-11-18 11:35 UTC (permalink / raw)
To: akpm, ast, boqun.feng, byungchul.park, daniel, davem,
kernel-team, kirill, kuznet, linux-kernel, linux-mm, mingo,
netdev, npiggin, peterz, syzkaller-bugs, tglx, torvalds, walken,
willy, yoshfuji
syzbot has bisected this bug to:
commit a10b5c564741cd3b6708f085a1fa892b63c2063d
Author: Byungchul Park <byungchul.park@lge.com>
Date: Mon Aug 14 07:00:51 2017 +0000
locking/lockdep: Add a comment about crossrelease_hist_end() in
lockdep_sys_exit()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1026190ce00000
start commit: 3a5af36b Merge tag '4.19-rc3-smb3-cifs' of git://git.samba..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=1226190ce00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1426190ce00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
Reported-by: syzbot+68dce7caebd8543121de@syzkaller.appspotmail.com
Fixes: a10b5c564741 ("locking/lockdep: Add a comment about
crossrelease_hist_end() in lockdep_sys_exit()")
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 ip6_tnl_parse_tlv_enc_lim
@ 2019-11-18 11:35 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2019-11-18 11:35 UTC (permalink / raw)
To: akpm, ast, boqun.feng, byungchul.park, daniel, davem,
kernel-team, kirill, kuznet, linux-kernel, linux-mm, mingo,
netdev, npiggin, peterz, syzkaller-bugs, tglx, torvalds, walken,
willy, yoshfuji
syzbot has bisected this bug to:
commit a10b5c564741cd3b6708f085a1fa892b63c2063d
Author: Byungchul Park <byungchul.park@lge.com>
Date: Mon Aug 14 07:00:51 2017 +0000
locking/lockdep: Add a comment about crossrelease_hist_end() in
lockdep_sys_exit()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1026190ce00000
start commit: 3a5af36b Merge tag '4.19-rc3-smb3-cifs' of git://git.samba..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=1226190ce00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1426190ce00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
Reported-by: syzbot+68dce7caebd8543121de@syzkaller.appspotmail.com
Fixes: a10b5c564741 ("locking/lockdep: Add a comment about
crossrelease_hist_end() in lockdep_sys_exit()")
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 ip6_tnl_parse_tlv_enc_lim
2018-09-17 21:23 KASAN: slab-out-of-bounds Read in ip6_tnl_parse_tlv_enc_lim syzbot
@ 2019-12-10 22:08 ` syzbot
2019-12-10 22:08 ` syzbot
1 sibling, 0 replies; 6+ messages in thread
From: syzbot @ 2019-12-10 22:08 UTC (permalink / raw)
To: akpm, ast, boqun.feng, byungchul.park, daniel, davem, dledford,
jgg, jgg, kernel-team, kirill, kuznet, leon, leonro,
linux-kernel, linux-mm, linux-rdma, mingo, netdev, npiggin,
parav, peterz, syzkaller-bugs, tglx, torvalds, walken, willy,
yoshfuji
syzbot suspects this bug was fixed by commit:
commit 30471d4b20335d9bd9ae9b2382a1e1e97d18d86d
Author: Leon Romanovsky <leonro@mellanox.com>
Date: Sun Feb 3 12:55:50 2019 +0000
RDMA/core: Share driver structure size with core
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16b7bb7ae00000
start commit: 3a5af36b Merge tag '4.19-rc3-smb3-cifs' of git://git.samba..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
If the result looks correct, please mark the bug fixed by replying with:
#syz fix: RDMA/core: Share driver structure size with core
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 ip6_tnl_parse_tlv_enc_lim
@ 2019-12-10 22:08 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2019-12-10 22:08 UTC (permalink / raw)
To: akpm, ast, boqun.feng, byungchul.park, daniel, davem, dledford,
jgg, jgg, kernel-team, kirill, kuznet, leon, leonro,
linux-kernel, linux-mm, linux-rdma, mingo, netdev, npiggin,
parav, peterz, syzkaller-bugs, tglx, torvalds, walken, willy,
yoshfuji
syzbot suspects this bug was fixed by commit:
commit 30471d4b20335d9bd9ae9b2382a1e1e97d18d86d
Author: Leon Romanovsky <leonro@mellanox.com>
Date: Sun Feb 3 12:55:50 2019 +0000
RDMA/core: Share driver structure size with core
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16b7bb7ae00000
start commit: 3a5af36b Merge tag '4.19-rc3-smb3-cifs' of git://git.samba..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
If the result looks correct, please mark the bug fixed by replying with:
#syz fix: RDMA/core: Share driver structure size with core
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 ip6_tnl_parse_tlv_enc_lim
2019-12-10 22:08 ` syzbot
(?)
@ 2019-12-10 22:11 ` Jason Gunthorpe
-1 siblings, 0 replies; 6+ messages in thread
From: Jason Gunthorpe @ 2019-12-10 22:11 UTC (permalink / raw)
To: syzbot
Cc: akpm, ast, boqun.feng, byungchul.park, daniel, davem, dledford,
kernel-team, kirill, kuznet, leon, leonro, linux-kernel,
linux-mm, linux-rdma, mingo, netdev, npiggin, parav, peterz,
syzkaller-bugs, tglx, torvalds, walken, willy, yoshfuji
On Tue, Dec 10, 2019 at 02:08:01PM -0800, syzbot wrote:
> syzbot suspects this bug was fixed by commit:
>
> commit 30471d4b20335d9bd9ae9b2382a1e1e97d18d86d
> Author: Leon Romanovsky <leonro@mellanox.com>
> Date: Sun Feb 3 12:55:50 2019 +0000
>
> RDMA/core: Share driver structure size with core
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16b7bb7ae00000
> start commit: 3a5af36b Merge tag '4.19-rc3-smb3-cifs' of git://git.samba..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=9c4a80625153107e
> dashboard link: https://syzkaller.appspot.com/bug?extid=68dce7caebd8543121de
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1068a44e400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146386c6400000
>
> If the result looks correct, please mark the bug fixed by replying with:
>
> #syz fix: RDMA/core: Share driver structure size with core
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
Seems pretty unlikely
Jason
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-12-10 22:11 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-09-17 21:23 KASAN: slab-out-of-bounds Read in ip6_tnl_parse_tlv_enc_lim syzbot
2019-11-18 11:35 ` syzbot
2019-11-18 11:35 ` syzbot
2019-12-10 22:08 ` syzbot
2019-12-10 22:08 ` syzbot
2019-12-10 22:11 ` Jason Gunthorpe
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