ASan report bad-free

[zouyonghao]

I got bad-free when I ran some tests with example/server

==24124==WARNING: AddressSanitizer failed to allocate 0x312e302e302e3732 bytes
=================================================================
==24124==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x611000001618 in thread T0
    #0 0x4934fd  (/home/zyh/raft/example/server+0x4934fd)
    #1 0x7fb7421e92dc  (/home/zyh/raft/.libs/libraft.so.0+0xe2dc) src/heap.c:65
    #2 0x7fb742205bba  (/home/zyh/raft/.libs/libraft.so.0+0x2abba) src/uv_encoding.c:371
    #3 0x7fb74220cb5a  (/home/zyh/raft/.libs/libraft.so.0+0x31b5a) src/uv_recv.c:260
    #4 0x7fb742c7e5ce  (/usr/lib/x86_64-linux-gnu/libuv.so.1+0x155ce)
    #5 0x7fb742c7f33b  (/usr/lib/x86_64-linux-gnu/libuv.so.1+0x1633b)
    #6 0x7fb742c8433f  (/usr/lib/x86_64-linux-gnu/libuv.so.1+0x1b33f)
    #7 0x7fb742c74cc7  (/usr/lib/x86_64-linux-gnu/libuv.so.1+0xbcc7)
    #8 0x4c3e4f  (/home/zyh/raft/example/server+0x4c3e4f)
    #9 0x7fb74142abf6  (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
    #10 0x41b879  (/home/zyh/raft/example/server+0x41b879)

0x611000001618 is located 152 bytes inside of 200-byte region [0x611000001580,0x611000001648)
allocated by thread T0 here:
    #0 0x49377d  (/home/zyh/raft/example/server+0x49377d)
    #1 0x7fb74220c2c9  (/home/zyh/raft/.libs/libraft.so.0+0x312c9) src/uv_recv.c:347

SUMMARY: AddressSanitizer: bad-free (/home/zyh/raft/example/server+0x4934fd)
==24124==ABORTING

[MathieuBordere]

Hi @zouyonghao ,

Have you adapted some of the code, or are you running everything as-is?
Can you list the steps you perform so I can reproduce the issue?

[zouyonghao]

Hi @MathieuBordere
Thanks for your time and jobs on fixing issues.

I do not change the code.

The issues I reported are found by my fuzzing tool for distributed systems, it will produce several errors while the system runs including network error or program crashes.
So usually the issue happens when the error handling code is incorrect.