BUG: unable to handle kernel paging request in bpf_clone_redirect

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: b7e40c3d Merge 4.14.75 into android-4.14
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=134593e6400000
kernel config: https://syzkaller.appspot.com/x/.config?x=83372ecdbe063bdb
dashboard link: https://syzkaller.appspot.com/bug?extid=a437141e2aa76acf31d5
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+a43714...@syzkaller.appspotmail.com

BUG: unable to handle kernel paging request at fffffbfff03700ad
IP: read_pnet include/net/net_namespace.h:281 [inline]
IP: dev_net include/linux/netdevice.h:2012 [inline]
IP: ____bpf_clone_redirect net/core/filter.c:1767 [inline]
IP: bpf_clone_redirect+0x69/0x2b0 net/core/filter.c:1758
PGD 21fff6067 P4D 21fff6067 PUD 21fe6a067 PMD 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 12021 Comm: syz-executor5 Not tainted 4.14.75+ #18
task: ffff8801c95b9780 task.stack: ffff8801ad7b8000
RIP: 0010:read_pnet include/net/net_namespace.h:281 [inline]
RIP: 0010:dev_net include/linux/netdevice.h:2012 [inline]
RIP: 0010:____bpf_clone_redirect net/core/filter.c:1767 [inline]
RIP: 0010:bpf_clone_redirect+0x69/0x2b0 net/core/filter.c:1758
RSP: 0018:ffff8801ad7bf818 EFLAGS: 00010a03
RAX: dffffc0000000000 RBX: ffff8801c9deae00 RCX: 00000000000002f8
RDX: 1ffffffff03700ad RSI: ffffc90002b1c000 RDI: ffffffff81b8056d
RBP: ffffffff81b80035 R08: ffff8801ad7c0000 R09: 0000000000000000
R10: 1ffff10035af7f2b R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffed0035af7f30 R15: ffffc90001931088
FS: 00007f13c0125700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff03700ad CR3: 00000001c7ef0005 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
___bpf_prog_run+0x248e/0x5c70 kernel/bpf/core.c:1012
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 48 02 00 00 48 b8 00 00 00 00 00 fc
ff df 48 8b 6b 10 48 8d bd 38 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00
0f 85 2c 02 00 00 48 8b bd 38 05 00 00 44 89 ee e8
RIP: read_pnet include/net/net_namespace.h:281 [inline] RSP:
ffff8801ad7bf818
RIP: dev_net include/linux/netdevice.h:2012 [inline] RSP: ffff8801ad7bf818
RIP: ____bpf_clone_redirect net/core/filter.c:1767 [inline] RSP:
ffff8801ad7bf818
RIP: bpf_clone_redirect+0x69/0x2b0 net/core/filter.c:1758 RSP:
ffff8801ad7bf818
CR2: fffffbfff03700ad
---[ end trace 1a3cb65d48221797 ]---


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.