[Bug-wget] segment fault while downloading .tar.gz file

[Jay Bhavsar]

So, I was trying to resolve this
<https://gitlab.com/gnuwget/wget2/issues/315> issue.

Command I run:

./wget2_noinstall http://www.lysator.liu.se/~nisse/archive/nettle-3.4.tar.gz

What I get:

[0] Downloading 'http://www.lysator.liu.se/~nisse/archive/nettle-3.4.tar.gz'
...
Saving 'nettle-3.4.tar.gz.8'
Segmentation fault (core dumped)

Investigating with gdb:

(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x00007feecd9855b6 in wget_decompress (dc=0x7feec4036080,
src=0x7feec4003310 "\037\213\b", srclen=10456)
    at decompressor.c:415
#2  0x00007feecd98e452 in wget_http_get_response_cb (conn=0x7feec40008c0)
at http.c:1295
#3  0x0000000000419e06 in http_receive_response (conn=0x7feec40008c0) at
wget.c:3518
#4  0x00000000004158f7 in downloader_thread (p=0x1bb5250) at wget.c:2125
#5  0x00007feecd31b6ba in start_thread (arg=0x7feecc646700) at
pthread_create.c:333
#6  0x00007feecd05141d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

(gdb) bt full
#0  0x0000000000000000 in ?? ()
No symbol table info available.
#1  0x00007feecd9855b6 in wget_decompress (dc=0x7feec4036080,
src=0x7feec4003310 "\037\213\b", srclen=10456)
    at decompressor.c:415
        rc = 32750
#2  0x00007feecd98e452 in wget_http_get_response_cb (conn=0x7feec40008c0)
at http.c:1295
        bufsize = 102400
        body_len = 10456
        body_size = 0
        nbytes = 10774
        nread = 10774
        buf = 0x7feec4003310 "\037\213\b"
        p = 0x7feec400344e
"\n\242\305]\274\206o%\035\306v\344$\321ks\250-d\227\334\347\241\345\261^|\357\271\066k\273\066\367\005g\026\230\245\021\061\341\016\273\237\313U\027\340Kaal\240\331c\027\001hZ\221\033\370'\232\024{\344\241\300;;
\362\264P#\255\260
d%+\242\035\205\t\242`Fk\313\330͜yV\224-W\222\321R\314\063\376\027r\274\377\247p\314\356\203h\302\\\237\324my\036\367*\304\034\350\254\325v\246T\207\326\020\365I0\203\002'\240\v\225>\301\230\330=g\261\340\243ث\020\002"
        resp = 0x7feec4035ce0
        dc = 0x7feec4036080
        req = 0x7feec401c7f0
#3  0x0000000000419e06 in http_receive_response (conn=0x7feec40008c0) at
wget.c:3518
        resp = 0x0
        context = 0x0
#4  0x00000000004158f7 in downloader_thread (p=0x1bb5250) at wget.c:2125
        downloader = 0x1bb5250
        resp = 0x0
        job = 0x1bb51c0
        host = 0x1bb5000
        pending = 1
        max_pending = 1
        locked = 0
        pause = 0
        action = ACTION_GET_RESPONSE
#5  0x00007feecd31b6ba in start_thread (arg=0x7feecc646700) at
pthread_create.c:333
---Type <return> to continue, or q <return> to quit---
        __res = <optimized out>
        pd = 0x7feecc646700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140663608076032,
5058422716409210776, 0, 140731387977695, 140663608076736,
                0, -5048895408410564712, -5048892748985505896},
mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0},
            data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007feecd05141d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

I haven't been able to reproduce this issue with any other url. Also, wget2
freezes with all https urls. Anyone seen something like this before? Is
this real issue or my system acting up? In any case, should I dig further
and create issue?