From: syzbot <syzbot+4caeae4c7103813598ae@syzkaller.appspotmail.com>
To: davem@davemloft.net, edumazet@google.com, jhs@mojatatu.com,
jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com,
syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com
Subject: [syzbot] general protection fault in em_cmp_match
Date: Wed, 14 Dec 2022 16:12:50 -0800 [thread overview]
Message-ID: <000000000000aa918f05efd2b677@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 296a7b7eb792 Merge tag 'for-linus' of git://git.armlinux.o..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=173ee77d880000
kernel config: https://syzkaller.appspot.com/x/.config?x=4edf421741552bc3
dashboard link: https://syzkaller.appspot.com/bug?extid=4caeae4c7103813598ae
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=128f80ed880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16096513880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/44efe7c1185f/disk-296a7b7e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/22c2c707e34d/vmlinux-296a7b7e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9a8c92b56666/bzImage-296a7b7e.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4caeae4c7103813598ae@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 154 Comm: kworker/1:2 Not tainted 6.1.0-rc8-syzkaller-00154-g296a7b7eb792 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:em_cmp_match+0x55/0x670 net/sched/em_cmp.c:25
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b0 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 4c 8d 7d 0a 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 47
RSP: 0018:ffffc90002e4ec40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801f5817c0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff87f06d8d RDI: ffff88801f5817c8
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880719c9a00
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000000c28e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tcf_em_match net/sched/ematch.c:492 [inline]
__tcf_em_tree_match+0x153/0x560 net/sched/ematch.c:518
tcf_em_tree_match include/net/pkt_cls.h:502 [inline]
basic_classify+0x206/0x330 net/sched/cls_basic.c:48
__tcf_classify net/sched/cls_api.c:1567 [inline]
tcf_classify+0x3ec/0xa40 net/sched/cls_api.c:1633
prio_classify net/sched/sch_prio.c:42 [inline]
prio_enqueue+0x3ab/0x790 net/sched/sch_prio.c:75
dev_qdisc_enqueue+0x46/0x390 net/core/dev.c:3785
__dev_xmit_skb net/core/dev.c:3874 [inline]
__dev_queue_xmit+0x2279/0x3ba0 net/core/dev.c:4222
dev_queue_xmit include/linux/netdevice.h:3008 [inline]
neigh_hh_output include/net/neighbour.h:530 [inline]
neigh_output include/net/neighbour.h:544 [inline]
ip_finish_output2+0x14e3/0x2180 net/ipv4/ip_output.c:228
__ip_finish_output net/ipv4/ip_output.c:306 [inline]
__ip_finish_output+0x396/0x650 net/ipv4/ip_output.c:288
ip_finish_output+0x31/0x280 net/ipv4/ip_output.c:316
NF_HOOK_COND include/linux/netfilter.h:291 [inline]
ip_output+0x1a3/0x320 net/ipv4/ip_output.c:430
dst_output include/net/dst.h:445 [inline]
ip_local_out+0xb3/0x1a0 net/ipv4/ip_output.c:126
iptunnel_xmit+0x67e/0x9f0 net/ipv4/ip_tunnel_core.c:82
geneve_xmit_skb drivers/net/geneve.c:996 [inline]
geneve_xmit+0x1318/0x4910 drivers/net/geneve.c:1108
__netdev_start_xmit include/linux/netdevice.h:4840 [inline]
netdev_start_xmit include/linux/netdevice.h:4854 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0x1c2/0x990 net/core/dev.c:3606
__dev_queue_xmit+0x2cdf/0x3ba0 net/core/dev.c:4256
dev_queue_xmit include/linux/netdevice.h:3008 [inline]
neigh_resolve_output net/core/neighbour.c:1571 [inline]
neigh_resolve_output+0x51b/0x840 net/core/neighbour.c:1551
neigh_output include/net/neighbour.h:546 [inline]
ip6_finish_output2+0x56c/0x1530 net/ipv6/ip6_output.c:134
__ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
ip6_finish_output+0x694/0x1170 net/ipv6/ip6_output.c:206
NF_HOOK_COND include/linux/netfilter.h:291 [inline]
ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
dst_output include/net/dst.h:445 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xa63/0x1740 net/ipv6/ndisc.c:508
ndisc_send_ns+0xaa/0x130 net/ipv6/ndisc.c:666
addrconf_dad_work+0xbf4/0x12d0 net/ipv6/addrconf.c:4171
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:em_cmp_match+0x55/0x670 net/sched/em_cmp.c:25
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b0 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 4c 8d 7d 0a 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 47
RSP: 0018:ffffc90002e4ec40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801f5817c0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff87f06d8d RDI: ffff88801f5817c8
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880719c9a00
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000000c28e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 48 89 fa mov %rdi,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
b: 0f 85 b0 05 00 00 jne 0x5c1
11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
18: fc ff df
1b: 48 8b 6b 08 mov 0x8(%rbx),%rbp
1f: 4c 8d 7d 0a lea 0xa(%rbp),%r15
23: 4c 89 fa mov %r15,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction
2e: 4c 89 f8 mov %r15,%rax
31: 83 e0 07 and $0x7,%eax
34: 83 c0 01 add $0x1,%eax
37: 38 d0 cmp %dl,%al
39: 7c 08 jl 0x43
3b: 84 d2 test %dl,%dl
3d: 0f .byte 0xf
3e: 85 .byte 0x85
3f: 47 rex.RXB
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
reply other threads:[~2022-12-15 0:15 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=000000000000aa918f05efd2b677@google.com \
--to=syzbot+4caeae4c7103813598ae@syzkaller.appspotmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=jhs@mojatatu.com \
--cc=jiri@resnulli.us \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=xiyou.wangcong@gmail.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.