From: syzbot <syzbot+5f66662adc70969940fd@syzkaller.appspotmail.com>
To: davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us,
kuba@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com,
xiyou.wangcong@gmail.com
Subject: Re: BUG: unable to handle kernel paging request in tcf_action_dump_terse
Date: Sun, 04 Oct 2020 01:48:22 -0700 [thread overview]
Message-ID: <000000000000a5b86105b0d46d59@google.com> (raw)
In-Reply-To: <000000000000b3d57105b05ab856@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: 2172e358 Add linux-next specific files for 20201002
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12ba75ff900000
kernel config: https://syzkaller.appspot.com/x/.config?x=70698f530a7e856f
dashboard link: https://syzkaller.appspot.com/bug?extid=5f66662adc70969940fd
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=142fd4af900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ffcdeb900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5f66662adc70969940fd@syzkaller.appspotmail.com
BUG: unable to handle page fault for address: fffffffffffffff0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD a291067 P4D a291067 PUD a293067 PMD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8162 Comm: syz-executor344 Not tainted 5.9.0-rc7-next-20201002-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcf_action_dump_terse+0x8c/0x4e0 net/sched/act_api.c:759
Code: 3c 03 0f 8e 0a 03 00 00 48 89 da 44 8b ad b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 10 04 00 00 <48> 8b 03 4c 8d 60 10 4c 89 e7 e8 55 5b 58 fd 4c 89 e1 be 01 00 00
RSP: 0018:ffffc90009bff178 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffffffffffff0 RCX: 0000000000000000
RDX: 1ffffffffffffffe RSI: ffffffff867eb859 RDI: ffff888097102eb8
RBP: ffff888097102e00 R08: 0000000000000000 R09: ffff88809ea92024
R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffff0
R13: 0000000000000024 R14: ffff88809ea92000 R15: ffff888097102ec0
FS: 00007f6bfe65f700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff0 CR3: 0000000096ec4000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tcf_action_dump_1+0xd2/0x5a0 net/sched/act_api.c:788
tcf_dump_walker net/sched/act_api.c:249 [inline]
tcf_generic_walker+0x207/0xba0 net/sched/act_api.c:343
tc_dump_action+0x6d5/0xe60 net/sched/act_api.c:1610
netlink_dump+0x4df/0xba0 net/netlink/af_netlink.c:2268
__netlink_dump_start+0x643/0x900 net/netlink/af_netlink.c:2373
netlink_dump_start include/linux/netlink.h:246 [inline]
rtnetlink_rcv_msg+0x70f/0xad0 net/core/rtnetlink.c:5526
netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2489
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:671
____sys_sendmsg+0x331/0x810 net/socket.c:2362
___sys_sendmsg+0xf3/0x170 net/socket.c:2416
__sys_sendmmsg+0x196/0x4b0 net/socket.c:2506
__do_sys_sendmmsg net/socket.c:2535 [inline]
__se_sys_sendmmsg net/socket.c:2532 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2532
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x44a569
Code: e8 8c e7 ff ff 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 5b 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6bfe65ed98 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 000000000044a569
RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038
Modules linked in:
CR2: fffffffffffffff0
---[ end trace c7fd3dfeaf54c122 ]---
RIP: 0010:tcf_action_dump_terse+0x8c/0x4e0 net/sched/act_api.c:759
Code: 3c 03 0f 8e 0a 03 00 00 48 89 da 44 8b ad b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 10 04 00 00 <48> 8b 03 4c 8d 60 10 4c 89 e7 e8 55 5b 58 fd 4c 89 e1 be 01 00 00
RSP: 0018:ffffc90009bff178 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffffffffffff0 RCX: 0000000000000000
RDX: 1ffffffffffffffe RSI: ffffffff867eb859 RDI: ffff888097102eb8
RBP: ffff888097102e00 R08: 0000000000000000 R09: ffff88809ea92024
R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffff0
R13: 0000000000000024 R14: ffff88809ea92000 R15: ffff888097102ec0
FS: 00007f6bfe65f700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff0 CR3: 0000000096ec4000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
next prev parent reply other threads:[~2020-10-04 8:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 7:36 BUG: unable to handle kernel paging request in tcf_action_dump_terse syzbot
2020-10-04 8:48 ` syzbot [this message]
2020-10-05 8:10 ` syzbot
2020-10-11 19:15 ` Cong Wang
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=000000000000a5b86105b0d46d59@google.com \
--to=syzbot+5f66662adc70969940fd@syzkaller.appspotmail.com \
--cc=davem@davemloft.net \
--cc=jhs@mojatatu.com \
--cc=jiri@resnulli.us \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--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.