BUG: unable to handle kernel paging request in vdso_fault

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 4d41ead6 Merge tag 'block-5.9-2020-08-28' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1151352e900000
kernel config: https://syzkaller.appspot.com/x/.config?x=978db74cb30aa994
dashboard link: https://syzkaller.appspot.com/bug?extid=040ca9672a29e86a979c
compiler: gcc (GCC) 10.1.0-syz 20200507
CC: [b...@alien8.de h...@zytor.com linux-...@vger.kernel.org lu...@kernel.org mi...@redhat.com tg...@linutronix.de x...@kernel.org]

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+040ca9...@syzkaller.appspotmail.com

BUG: unable to handle page fault for address: 0000000000040007
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 53631067 P4D 53631067 PUD 4cd07067 PMD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8365 Comm: syz-executor.2 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vdso_fault+0x0/0x220 arch/x86/entry/vdso/vma.c:62
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 <00> 70 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900065e7b20 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffffff81007b80 RCX: ffffc9000e07e000
RDX: ffffc900065e7c08 RSI: ffff8880a2e96000 RDI: ffffffff884051e0
RBP: ffffffff884051e0 R08: 0000000000000000 R09: ffffffff8ab21c87
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900065e7c08
R13: ffff8880a2e96000 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f391659e700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000040007 CR3: 0000000095b74000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
special_mapping_fault+0xc7/0x340 mm/mmap.c:3410
__do_fault+0x10d/0x4d0 mm/memory.c:3463
do_read_fault mm/memory.c:3856 [inline]
do_fault mm/memory.c:3984 [inline]
handle_pte_fault mm/memory.c:4224 [inline]
__handle_mm_fault mm/memory.c:4359 [inline]
handle_mm_fault+0x3477/0x4590 mm/memory.c:4457
faultin_page mm/gup.c:887 [inline]
__get_user_pages+0x724/0x16b0 mm/gup.c:1105
populate_vma_page_range+0x24d/0x330 mm/gup.c:1435
__mm_populate+0x1ea/0x350 mm/gup.c:1483
mm_populate include/linux/mm.h:2562 [inline]
__do_sys_mlockall+0x44e/0x4f0 mm/mlock.c:822
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f391659dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 0000000000020cc0 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000118cf70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc2921dd9f R14: 00007f391659e9c0 R15: 000000000118cf4c
Modules linked in:
CR2: 0000000000040007
---[ end trace e99e10e5e49ac779 ]---
RIP: 0010:vdso_fault+0x0/0x220 arch/x86/entry/vdso/vma.c:62
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 00 00 00 00 00 70 07 00 00 00 00 00 <00> 70 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900065e7b20 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffffff81007b80 RCX: ffffc9000e07e000
RDX: ffffc900065e7c08 RSI: ffff8880a2e96000 RDI: ffffffff884051e0
RBP: ffffffff884051e0 R08: 0000000000000000 R09: ffffffff8ab21c87
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900065e7c08
R13: ffff8880a2e96000 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f391659e700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000746918 CR3: 0000000095b74000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600


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[syzbot]

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