Cleanup function causes crashes

[TylersGit]

(gdb) run
Starting program: /root/exercise26/./ex26
String: /var/log/messages

String: /var/log/messages.1

String: /var/log/messages.2

*** Error in `/root/exercise26/./ex26': corrupted size vs. prev_size: 0x0000000000602240 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7f474)[0x7ffff7a8c474]
/lib64/libc.so.6(+0x8156b)[0x7ffff7a8e56b]
/root/exercise26/./ex26[0x400870]
/root/exercise26/./ex26[0x400a69]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7ffff7a2f555]
/root/exercise26/./ex26[0x4006f9]
======= Memory map: ========
00400000-00401000 r-xp 00000000 fd:00 23006 /root/exercise26/ex26
00600000-00601000 r--p 00000000 fd:00 23006 /root/exercise26/ex26
00601000-00602000 rw-p 00001000 fd:00 23006 /root/exercise26/ex26
00602000-00623000 rw-p 00000000 00:00 0 [heap]
7ffff0000000-7ffff0021000 rw-p 00000000 00:00 0
7ffff0021000-7ffff4000000 ---p 00000000 00:00 0
7ffff77f7000-7ffff780c000 r-xp 00000000 fd:00 34397554 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7ffff780c000-7ffff7a0b000 ---p 00015000 fd:00 34397554 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7ffff7a0b000-7ffff7a0c000 r--p 00014000 fd:00 34397554 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7ffff7a0c000-7ffff7a0d000 rw-p 00015000 fd:00 34397554 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7ffff7a0d000-7ffff7bd1000 r-xp 00000000 fd:00 33589089 /usr/lib64/libc-2.17.so
7ffff7bd1000-7ffff7dd0000 ---p 001c4000 fd:00 33589089 /usr/lib64/libc-2.17.so
7ffff7dd0000-7ffff7dd4000 r--p 001c3000 fd:00 33589089 /usr/lib64/libc-2.17.so
7ffff7dd4000-7ffff7dd6000 rw-p 001c7000 fd:00 33589089 /usr/lib64/libc-2.17.so
7ffff7dd6000-7ffff7ddb000 rw-p 00000000 00:00 0
7ffff7ddb000-7ffff7dfd000 r-xp 00000000 fd:00 33589081 /usr/lib64/ld-2.17.so
7ffff7fef000-7ffff7ff2000 rw-p 00000000 00:00 0
7ffff7ff6000-7ffff7ffa000 rw-p 00000000 00:00 0
7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso]
7ffff7ffc000-7ffff7ffd000 r--p 00021000 fd:00 33589081 /usr/lib64/ld-2.17.so
7ffff7ffd000-7ffff7ffe000 rw-p 00022000 fd:00 33589081 /usr/lib64/ld-2.17.so
7ffff7ffe000-7ffff7fff000 rw-p 00000000 00:00 0
7ffffffde000-7ffffffff000 rw-p 00000000 00:00 0 [stack]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]

Program received signal SIGABRT, Aborted.
0x00007ffff7a43387 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.17-325.el7_9.x86_64 libgcc-4.8.5-44.el7.x86_64
(gdb) bt
#0 0x00007ffff7a43387 in raise () from /lib64/libc.so.6
#1 0x00007ffff7a44a78 in abort () from /lib64/libc.so.6
#2 0x00007ffff7a85f67 in __libc_message () from /lib64/libc.so.6
#3 0x00007ffff7a8c474 in malloc_printerr () from /lib64/libc.so.6
#4 0x00007ffff7a8e56b in _int_free () from /lib64/libc.so.6
#5 0x0000000000400870 in cleanup (logfind_dot_file=0x602010, file_list=0x602250) at ex26.c:39
#6 0x0000000000400a69 in main (argc=1, argv=0x7fffffffe088) at ex26.c:66
(gdb)

[TylersGit]

Solved in side branch by fixing the invalid writes in the read function, and improving the cleanup function overall.