panic: assignment to entry in nil map

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: f766826fe3b8 amd64: Remove proc0_tf, the bootstrap trapframe
git tree: https://github.com/freebsd/freebsd-src.git main
console output: https://syzkaller.appspot.com/x/log.txt?x=17e981a7300000
dashboard link: https://syzkaller.appspot.com/bug?extid=a797ab77de1de2da2cc4

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+a797ab...@syzkaller.appspotmail.com

panic: assignment to entry in nil map

goroutine 1 [running]:
github.com/google/syzkaller/pkg/signal.Serial.Deserialize(0xc00008a000, 0x0, 0x0, 0xc000244000, 0x4a7, 0x0, 0x0)
/syzkaller/gopath/src/github.com/google/syzkaller/pkg/signal/signal.go:91 +0xa0
main.(*Fuzzer).addInputFromAnotherFuzzer(0xc0000a9a00, 0xc000096c00, 0x2a, 0xc0004423c0, 0x122, 0x122, 0xc00008a000, 0x4a7, 0x4a7, 0xc000244000, ...)
/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:439 +0x103
main.(*Fuzzer).poll(0xc0000a9a00, 0x99e200, 0x0, 0xc0003c1e78)
/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:412 +0x427
main.main()
/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:267 +0x11d6
login:


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[Mark Johnston]

On Sat, Sep 25, 2021 at 01:40:22PM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: f766826fe3b8 amd64: Remove proc0_tf, the bootstrap trapframe
> git tree: https://github.com/freebsd/freebsd-src.git main
> console output: https://syzkaller.appspot.com/x/log.txt?x=17e981a7300000
> dashboard link: https://syzkaller.appspot.com/bug?extid=a797ab77de1de2da2cc4
>
> 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+a797ab...@syzkaller.appspotmail.com
>
> panic: assignment to entry in nil map
>
> goroutine 1 [running]:
> github.com/google/syzkaller/pkg/signal.Serial.Deserialize(0xc00008a000, 0x0, 0x0, 0xc000244000, 0x4a7, 0x0, 0x0)
> /syzkaller/gopath/src/github.com/google/syzkaller/pkg/signal/signal.go:91 +0xa0
> main.(*Fuzzer).addInputFromAnotherFuzzer(0xc0000a9a00, 0xc000096c00, 0x2a, 0xc0004423c0, 0x122, 0x122, 0xc00008a000, 0x4a7, 0x4a7, 0xc000244000, ...)
> /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:439 +0x103
> main.(*Fuzzer).poll(0xc0000a9a00, 0x99e200, 0x0, 0xc0003c1e78)
> /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:412 +0x427
> main.main()
> /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:267 +0x11d6
> login:

#syz dup: panic: runtime error: invalid memory address or nil pointer dereference