general protection fault in vmalloc_fault

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: cddaf02bcb73 tg3: optionally use eth_platform_get_mac_addr..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17b8da47400000
kernel config: https://syzkaller.appspot.com/x/.config?x=d86f24333880b605
dashboard link: https://syzkaller.appspot.com/bug?extid=beeb573531cfa62a8a42
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [da...@davemloft.net kuz...@ms2.inr.ac.ru
linux-...@vger.kernel.org net...@vger.kernel.org yosh...@linux-ipv6.org]

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+beeb57...@syzkaller.appspotmail.com

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
PANIC: double fault, error_code: 0x0
CPU: 1 PID: 24234 Comm: syz-executor4 Not tainted 4.20.0-rc2+ #302
CPU: 0 PID: 8194 Comm: syz-executor3 Not tainted 4.20.0-rc2+ #302
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:vmalloc_fault+0x426/0x770 arch/x86/mm/fault.c:405
RIP: 0010:__udp4_lib_err+0x8e/0x1590 net/ipv4/udp.c:682
Code: e0 e8 4e 24 47 00 48 b8 00 00 00 00 80 88 ff ff 48 ba 00 00 00 00 00
fc ff df 48 01 c3 4d 21 e5 4c 01 eb 48 89 d9 48 c1 e9 03 <80> 3c 11 00 0f
85 b2 02 00 00 48 8b 1b 31 ff 49 89 dc 49 83 e4 9f
Code: c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f2 f2 f2 f2 c7 40 0c
00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 <e8> 1d c4 ce fa
48 8d 83 d8 00 00 00 48 89 85 08 ff ff ff 48 c1 e8
RSP: 0018:ffff8881c0c6eda8 EFLAGS: 00010002
RSP: 0018:ffff8881d9bfdfe8 EFLAGS: 00010246
RAX: ffff888000000000 RBX: 000f1101c282b010 RCX: 0001e22038505602
RAX: 0000000000000000 RBX: ffff8881c282b540 RCX: ffffffff86bf0425
RDX: dffffc0000000000 RSI: ffffffff81386392 RDI: 0000000000000007
RDX: ffffffff8a17be20 RSI: 0000000000000000 RDI: ffff8881c282b540
RBP: ffff8881c0c6edd8 R08: ffff8881d2a48100 R09: 0000000000000000
RBP: ffff8881d9bfe130 R08: ffff8881ba98c180 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 000ffffffffff000
R13: 000f8881c282b000 R14: ffffc900005dc738 R15: 1ffffffff12a3f90
R10: 0000000000000000 R11: ffff8881dae2db3b R12: dffffc0000000000
FS: 0000000001560940(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
R13: 1ffff1103b37fc2d R14: ffff8881d9bfe1c8 R15: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
FS: 00007fdab56cb700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CR2: ffffc900005dc738 CR3: 000000018bb55000 CR4: 00000000001406e0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
CR2: ffff8881d9bfdfd8 CR3: 000000019c182000 CR4: 00000000001406f0
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Call Trace:
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
do_kern_addr_fault arch/x86/mm/fault.c:1203 [inline]
__do_page_fault+0x860/0xe60 arch/x86/mm/fault.c:1487
Call Trace:


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[syzbot]

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