panic: panic: panic: panic: panic: panic: panic: panic: panic: panic: panic:

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 15ac8fdb Add linux-next specific files for 20201207
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15699413500000
kernel config: https://syzkaller.appspot.com/x/.config?x=3696b8138207d24d
dashboard link: https://syzkaller.appspot.com/bug?extid=467bae28a4edc5847047
compiler: gcc (GCC) 10.1.0-syz 20200507
CC: [linux-...@vger.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+467bae...@syzkaller.appspotmail.com

panic: panic: panic: panic: panic: panic: panic: panic: panic: panic: panic:
PC=0x m=2 sigcode=128

goroutine 0 [idle]:

goroutine 1 [copystack]:
fatal error:

goroutine 0 [idle]:
fatal error: index out of range
stack trace unavailable


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[Dmitry Vyukov]

linux-next seems to start corrupting memory of user-space processes,
but it also seems to be fixed by now:
https://syzkaller.appspot.com/bug?id=8fd2a5cb9fda77cbea5ef75235e9cd8aa7106a88
https://syzkaller.appspot.com/bug?id=ad9fe42593b16340fbd1e776deb964f45055fa2f
https://syzkaller.appspot.com/bug?id=31393f0c8cfba2ceff2d0d70de5458993d8d4088
https://syzkaller.appspot.com/bug?id=47ebe9b93b8512fc1ebac4c2512f0339039cc1a9

#syz invalid

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