Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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3.1.7
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None
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None
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None
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Fedora 32
Description
Attaching the test file shortly. Compile this with:
gcc -g conc-test.c -lmysqlclient -I /usr/include/mysql
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For me linuxjedi-mac.local is an mdns hostname of another machine that is expected to return an IPv6 address. In Fedora 32 using connector-c 3.1.7 RPMs attempting to do this crashes. I cannot reproduce using a hosts file entry (I've not tried regular AAAA DNS).
I cannot reproduce this on macOS using the connector c in 10.4.13 and I haven't tried another platform yet.
This is the stack:
Program received signal SIGSEGV, Segmentation fault.
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0x00007ffff7e0ba9f in unlink_chunk (p=p@entry=0x427d90, av=<optimized out>) at malloc.c:1453
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1453 if (chunksize (p) != prev_size (next_chunk (p)))
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(gdb) bt
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#0 0x00007ffff7e0ba9f in unlink_chunk (p=p@entry=0x427d90, av=<optimized out>)
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at malloc.c:1453
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#1 0x00007ffff7e0e41a in _int_malloc (av=av@entry=0x7ffff7f469e0 <main_arena>,
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bytes=bytes@entry=28) at malloc.c:4038
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#2 0x00007ffff7e0f534 in __GI___libc_malloc (bytes=28) at malloc.c:3058
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#3 0x00007ffff79805ec in __res_context_send (ctx=ctx@entry=0x428480,
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buf=buf@entry=0x427e40 "\237r\001", buflen=buflen@entry=23, buf2=buf2@entry=0x0,
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buflen2=buflen2@entry=0, ans=<optimized out>, ans@entry=0x4282c0 "\222\065",
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anssiz=<optimized out>, ansp=0x0, ansp2=0x0, nansp2=0x0, resplen2=0x0,
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ansp2_malloced=0x0) at res_send.c:472
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#4 0x00007ffff797d1d3 in __GI___res_context_query (ctx=ctx@entry=0x428480,
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name=name@entry=0x7ffff799302c "local", class=class@entry=1, type=type@entry=6,
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answer=answer@entry=0x4282c0 "\222\065", anslen=anslen@entry=65535,
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answerp=<optimized out>, answerp2=<optimized out>, nanswerp2=<optimized out>,
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resplen2=<optimized out>, answerp2_malloced=<optimized out>) at res_query.c:208
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#5 0x00007ffff797d933 in context_query_common (anslen=65535, answer=0x4282c0 "\222\065",
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type=6, class=1, name=0x7ffff799302c "local", ctx=0x428480) at res_query.c:292
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#6 __res_nquery (statp=statp@entry=0x428080, name=name@entry=0x7ffff799302c "local",
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class=class@entry=1, type=type@entry=6, answer=answer@entry=0x4282c0 "\222\065",
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anslen=anslen@entry=65535) at res_query.c:305
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#7 0x00007ffff7991636 in local_soa () at src/util.c:125
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#8 0x00007ffff7991885 in verify_name_allowed_with_soa (
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name=name@entry=0x402016 "linuxjedi-mac.local",
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mdns_allow_file=mdns_allow_file@entry=0x0) at src/util.c:65
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#9 0x00007ffff799247a in gethostbyname_impl (h_errnop=0x7ffff79b7724,
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errnop=0x7ffff79b76c0, u=0x438320, af=<optimized out>,
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name=0x402016 "linuxjedi-mac.local") at src/nss.c:166
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#10 _nss_mdns4_minimal_gethostbyname4_r (name=name@entry=0x402016 "linuxjedi-mac.local",
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pat=pat@entry=0x4385d8, buffer=0x4388e0 "#\351j>", <incomplete sequence \335>,
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buflen=1024, errnop=errnop@entry=0x7ffff79b76c0,
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h_errnop=h_errnop@entry=0x7ffff79b7724, ttlp=0x0) at src/nss.c:207
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#11 0x00007ffff7e6d867 in gaih_inet (name=<optimized out>,
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name@entry=0x402016 "linuxjedi-mac.local", service=service@entry=0x4387f0,
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req=req@entry=0x438d70, pai=pai@entry=0x4387d8, naddrs=naddrs@entry=0x4387d4,
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tmpbuf=tmpbuf@entry=0x4388d0) at ../sysdeps/posix/getaddrinfo.c:765
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#12 0x00007ffff7e6e739 in __GI_getaddrinfo (name=<optimized out>, service=<optimized out>,
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service@entry=0x438e10 "3306", hints=hints@entry=0x438d70, pai=pai@entry=0x438d68)
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at ../sysdeps/posix/getaddrinfo.c:2256
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#13 0x00007ffff7f67629 in pvio_socket_connect (cinfo=0x438ec0, pvio=0x429f60)
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at /usr/src/debug/mariadb-connector-c-3.1.7-2.20200316gitfbf1db6.fc32.x86_64/plugins/pvio/pvio_socket.c:874
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#14 pvio_socket_connect (pvio=0x429f60, cinfo=0x438ec0)
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at /usr/src/debug/mariadb-connector-c-3.1.7-2.20200316gitfbf1db6.fc32.x86_64/plugins/pvio/pvio_socket.c:747
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--Type <RET> for more, q to quit, c to continue without paging--
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#15 0x00007ffff7f702d9 in mthd_my_real_connect (mysql=0x7fffffffd620, host=<optimized out>,
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user=0x402011 "test", passwd=0x402010 "", db=0x0, port=3306,
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unix_socket=<optimized out>, client_flag=2147483648)
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at /usr/src/debug/mariadb-connector-c-3.1.7-2.20200316gitfbf1db6.fc32.x86_64/libmariadb/mariadb_lib.c:1455
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#16 0x00007ffff7f88e45 in mysql_real_connect_start_internal (d=<optimized out>)
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at /usr/src/debug/mariadb-connector-c-3.1.7-2.20200316gitfbf1db6.fc32.x86_64/libmariadb/mariadb_async.c:332
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#17 0x00007ffff7f8c9d5 in my_context_spawn (c=0x427940, f=0xd1c70004,
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d=0x7ffff7f46b30 <main_arena+336>)
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at /usr/src/debug/mariadb-connector-c-3.1.7-2.20200316gitfbf1db6.fc32.x86_64/libmariadb/ma_context.c:201
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#18 0x0000000000000000 in ?? ()
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