netdev - BUG: unable to handle kernel paging request in bpf_prog_select

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Date:   Sun, 24 Jun 2018 00:32:02 -0700
From:   syzbot <syzbot+d866d1925855328eac3b@...kaller.appspotmail.com>
To:     ast@...nel.org, daniel@...earbox.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: BUG: unable to handle kernel paging request in bpf_prog_select_runtime

Hello,

syzbot found the following crash on:

HEAD commit:    5e2204832b20 Merge tag 'powerpc-4.18-2' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11e79814400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=befbcd7305e41bb0
dashboard link: https://syzkaller.appspot.com/bug?extid=d866d1925855328eac3b
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d866d1925855328eac3b@...kaller.appspotmail.com

BUG: unable to handle kernel paging request at ffffc90001952002
PGD 1da947067 P4D 1da947067 PUD 1da948067 PMD 1d3a61067 PTE 800000016ba62161
Oops: 0003 [#1] SMP KASAN
CPU: 0 PID: 17593 Comm: syz-executor3 Not tainted 4.18.0-rc1+ #114
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
RIP: 0010:bpf_prog_lock_ro include/linux/filter.h:681 [inline]
RIP: 0010:bpf_prog_select_runtime+0xf5/0xa60 kernel/bpf/core.c:1519
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 c1 ea 03 0f b6 14 02 48 89  
c8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 de 08 00 00 <41> 80 66 02 fb  
e8 f1 67 f3 ff 49 8d 7e 20 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff8801b4d6fac8 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 00000000fffffff4 RCX: ffffc90001952002
RDX: 0000000000000000 RSI: ffffffff8188a717 RDI: 0000000000000005
RBP: ffff8801b4d6fb30 R08: ffff8801d778e400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90001952030 R14: ffffc90001952000 R15: ffff8801b4d6fb98
FS:  00007f59edc0c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90001952002 CR3: 00000001d20b4000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  bpf_prog_load+0x1194/0x1c60 kernel/bpf/syscall.c:1356
  __do_sys_bpf kernel/bpf/syscall.c:2360 [inline]
  __se_sys_bpf kernel/bpf/syscall.c:2322 [inline]
  __x64_sys_bpf+0x36c/0x510 kernel/bpf/syscall.c:2322
  do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a99
Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f59edc0bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f59edc0c6d4 RCX: 0000000000455a99
RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000004bb7d5 R14: 00000000004c8508 R15: 0000000000000023
Modules linked in:
Dumping ftrace buffer:
    (ftrace buffer empty)
CR2: ffffc90001952002
---[ end trace f4bd75b0437a2cce ]---
RIP: 0010:bpf_prog_lock_ro include/linux/filter.h:681 [inline]
RIP: 0010:bpf_prog_select_runtime+0xf5/0xa60 kernel/bpf/core.c:1519
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 c1 ea 03 0f b6 14 02 48 89  
c8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 de 08 00 00 <41> 80 66 02 fb  
e8 f1 67 f3 ff 49 8d 7e 20 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff8801b4d6fac8 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 00000000fffffff4 RCX: ffffc90001952002
RDX: 0000000000000000 RSI: ffffffff8188a717 RDI: 0000000000000005
RBP: ffff8801b4d6fb30 R08: ffff8801d778e400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90001952030 R14: ffffc90001952000 R15: ffff8801b4d6fb98
FS:  00007f59edc0c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90001952002 CR3: 00000001d20b4000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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