kernel panic: stack is corrupted in perf_prepare_sample

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 96d4f267e40f Remove 'type' argument from access_ok() funct..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16ecee4b400000
kernel config: https://syzkaller.appspot.com/x/.config?x=7308e68273924137
dashboard link: https://syzkaller.appspot.com/bug?extid=649f13ff4ae2bb472ee8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
CC: [ac...@kernel.org alexander...@linux.intel.com
jo...@redhat.com linux-...@vger.kernel.org mi...@redhat.com
namh...@kernel.org pet...@infradead.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+649f13...@syzkaller.appspotmail.com

Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in:
perf_prepare_sample+0x14cd/0x16b0 kernel/events/core.c:6490
CPU: 0 PID: 9900 Comm: syz-executor5 Not tainted 4.20.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
Kernel Offset: disabled
Rebooting in 86400 seconds..


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[Dmitry Vyukov]

#syz dup: kernel panic: stack is corrupted in udp4_lib_lookup2

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