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Sun, 22 Dec 2024 06:57:20 -0800 (PST) Date: Sun, 22 Dec 2024 06:57:20 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <676828d0.050a0220.226966.002b.GAE@google.com> Subject: [syzbot] panic: runtime error: floating point error [recovered] (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: aef25be35d23 hexagon: Disable constant extender optimizati.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1784c2df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=4f1586bab1323870 dashboard link: https://syzkaller.appspot.com/bug?extid=4fb57f15e8c895a21973 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=174c37e8580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-aef25be3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c52463f4576f/vmlinux-aef25be3.xz kernel image: https://storage.googleapis.com/syzbot-assets/9f8b90f65f14/bzImage-aef25be3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4fb57f15e8c895a21973@syzkaller.appspotmail.com panic: runtime error: floating point error [recovered] panic: bytes.Buffer: too large [signal SIGFPE: floating-point exception code=0x80 addr=0x0 pc=0x474d52] goroutine 7 [running]: bytes.growSlice.func1() /usr/local/go/src/bytes/buffer.go:232 +0x45 panic({0x128f240?, 0x297a930?}) /usr/local/go/src/runtime/panic.go:770 +0x132 bytes.growSlice({0xc007442800, 0x200, 0x1?}, 0x800?) /usr/local/go/src/bytes/buffer.go:249 +0xb9 bytes.(*Buffer).grow(0xc001b1c5a0, 0x1) /usr/local/go/src/bytes/buffer.go:151 +0x13d bytes.(*Buffer).Write(0xc001b1c5a0, {0xc001e70800, 0x1, 0x0?}) /usr/local/go/src/bytes/buffer.go:179 +0x59 fmt.Fprintf({0x1c7d9c0, 0xc001b1c5a0}, {0x1c1a3b0, 0x1}, {0x0, 0x0, 0x0}) /usr/local/go/src/fmt/print.go:225 +0x97 github.com/google/syzkaller/prog.(*serializer).printf(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:64 github.com/google/syzkaller/prog.(*PointerArg).serialize(0xc001d8a990, 0xc001b1c600) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:142 +0x271 github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c180?, 0xc001d8a990?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29 github.com/google/syzkaller/prog.(*GroupArg).serialize(0xc001d70f20, 0xc001b1c600) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:203 +0x26d github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c240?, 0xc001d70f20?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29 github.com/google/syzkaller/prog.(*PointerArg).serialize(0xc001d8ac30, 0xc001b1c600) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:146 +0x38e github.com/google/syzkaller/prog.(*serializer).arg(0x1c7d9c0?, {0x1c9c180?, 0xc001d8ac30?}) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:125 +0x29 github.com/google/syzkaller/prog.(*serializer).call(0xc001b1c600, 0xc0007b6190) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:86 +0x216 github.com/google/syzkaller/prog.(*Prog).serialize(0xc000ca7280, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:46 +0xd8 github.com/google/syzkaller/prog.(*Prog).Serialize(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/encoding.go:30 github.com/google/syzkaller/pkg/rpcserver.(*Runner).handleExecutingMessage(0xc0002746c0, 0xc007431308) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:371 +0x217 github.com/google/syzkaller/pkg/rpcserver.(*Runner).ConnectionLoop(0xc0002746c0) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/runner.go:201 +0x4b9 github.com/google/syzkaller/pkg/rpcserver.(*server).connectionLoop(0xc0016da300, 0xc0002746c0) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:356 +0x105 github.com/google/syzkaller/pkg/rpcserver.(*server).handleRunnerConn(0xc0016da300, 0xc0002746c0, 0xc00193e140) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:294 +0x411 github.com/google/syzkaller/pkg/rpcserver.(*server).handleConn(0xc0016da300, 0xc00193e140) /syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpcserver/rpcserver.go:261 +0x2b6 github.com/google/syzkaller/pkg/flatrpc.ListenAndServe.func1.1() /syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:55 +0x122 created by github.com/google/syzkaller/pkg/flatrpc.ListenAndServe.func1 in goroutine 53 /syzkaller/gopath/src/github.com/google/syzkaller/pkg/flatrpc/conn.go:52 +0xb1 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup