[Bug 63977] New: AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

classic Classic list List threaded Threaded
10 messages Options
Reply | Threaded
Open this post in threaded view
|

[Bug 63977] New: AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

            Bug ID: 63977
           Summary: AH00051: child pid 31483 exit signal Segmentation
                    fault mod_proxy_html.c
           Product: Apache httpd-2
           Version: 2.4.26
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_proxy_html
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

Christophe JAILLET <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|                            |All

--- Comment #1 from Christophe JAILLET <[hidden email]> ---
Hi,

without any description at all, it is hard to diagnose anything.

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #2 from chenkaifeng <[hidden email]> ---
(In reply to Christophe JAILLET from comment #1)
> Hi,
>
> without any description at all, it is hard to diagnose anything.

I will add description. and I am stilling checking the issue now

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #3 from chenkaifeng <[hidden email]> ---
Description:

The situation is: When we have very large html page(resource manager web,
 This page contains about 3,714 entries of application.), the httpd proxy_html
exit signal Segmentation fault.
when this page contains little entires of application, the httpd proxy_html
works fine.

gdb httpd httpd core.6193
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/opt/Bigdata/Apache-httpd-2.4.26/apache2/bin/httpd -f
/opt/Bigdata/Apache-httpd'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f3acec197bf in __memmove_ssse3_back () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install expat-2.1.0-10.x86_64
glibc-2.17-111.h34.x86_64 libgcc-4.8.5-4.h5.x86_64 libxml2-2.9.1-6.3.h12.x86_64
nss-softokn-freebl-3.36.0-5.h2.x86_64 xz-li-12alpha.x86_64 zlib-1.2.7-15.x86_64
(gdb) bt
#0  0x00007f3acec197bf in __memmove_ssse3_back () from /lib64/libc.so.6
#1  0x00007f3ac9a71987 in dump_content (ctx=ctx@entry=0x1360458) at
mod_proxy_html.c:249
#2  0x00007f3ac9a74d35 in pendElement (ctxt=0x1360458, uname=0x133a744
"script") at mod_proxy_html.c:378
#3  0x00007f3aca42c791 in htmlParseEndTag () from /usr/lib64/libxml2.so.2
#4  0x00007f3aca4300e1 in htmlParseChunk () from /usr/lib64/libxml2.so.2
#5  0x00007f3ac9a73ab2 in proxy_html_filter (f=<optimized out>, bb=<optimized
out>) at mod_proxy_html.c:915
#6  0x0000000000464cd1 in ap_process_async_request (r=0x134fe30) at
http_request.c:459
#7  0x0000000000461351 in ap_process_http_async_connection (c=0x1331ec8) at
http_core.c:154
#8  ap_process_http_connection (c=0x1331ec8) at http_core.c:248
#9  0x0000000000459490 in ap_run_process_connection (c=c@entry=0x1331ec8) at
connection.c:42
#10 0x000000000046d10e in process_socket (my_thread_num=0, my_child_num=3,
cs=0x1331e38, sock=<optimized out>, p=<optimized out>, thd=<optimized out>) at
event.c:945
#11 worker_thread (thd=<optimized out>, dummy=<optimized out>) at event.c:1849
#12 0x00007f3acf095dc5 in start_thread () from /lib64/libpthread.so.0
#13 0x00007f3acebc094d in clone () from /lib64/libc.so.6
(gdb) info


(gdb) p ctx->buf
$25 = 0x7f3abb127010 "\n", ' ' <repeats 14 times>, "var appsTableData=[\n[\"<a
href='/cluster/app/application_1574873447714_2041'>application_1574873447714_2041</a>\",\"root\",\"insert
overwrite tae1128_...\\'817200\\'(Stage-1)\",\"MAPREDU"...
(gdb) p ctx->buf + len
$26 = 0x7f3abb331feb "a>\",\"0\"]\n]\n          "<Address 0x7f3abb332000 out of
bounds>
(gdb) p ctx->buf+offs+s_to
$27 = 0x7f3abb1702a6 "873447714_2022/'>History</a>\",\"0\"],\n[\"<a
href='/cluster/app/application_1574873447714_2019tion_1574873447714_2019'>application_1574873447714_2019</a>\",\"root\",\"insert
e table table1128_...\\'808"...
(gdb) p len + 1 - s_from - offs
$28 = 1842525
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs
$29 = 0x7f3abb332003 <Address 0x7f3abb332003 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs^CQuit
(gdb) p len + 1 - s_from - offs
$30 = 1842525
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs -10
$31 = 0x7f3abb331ff9 "       "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 100
$32 = 0x7f3abb331f9f
"ttp://node-master2gfNp:8088/proxy/application_1574873447714_0492/'>History</a>\",\"0\"]\n]\n
         "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 20
$33 = 0x7f3abb331fef "\"0\"]\n]\n          "<Address 0x7f3abb332000 out of
bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 50
$34 = 0x7f3abb331fd1 "873447714_0492/'>History</a>\",\"0\"]\n]\n        
"<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 70
$35 = 0x7f3abb331fbd
"oxy/application_1574873447714_0492/'>History</a>\",\"0\"]\n]\n        
"<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 30
$36 = 0x7f3abb331fe5 "tory</a>\",\"0\"]\n]\n          "<Address 0x7f3abb332000
out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 10
$37 = 0x7f3abb331ff9 "       "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 5
$38 = 0x7f3abb331ffe "  "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 4
$39 = 0x7f3abb331fff " "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 3
$40 = 0x7f3abb332000 <Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 4
$41 = 0x7f3abb331fff " "<Address 0x7f3abb332000 out of bounds>
(gdb) p ctx->buf+offs+s_to + len + 1 - s_from - offs - 3
$42 = 0x7f3abb332000 <Address 0x7f3abb332000 out of bounds>

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #4 from chenkaifeng <[hidden email]> ---
The correspond code should be in function dump_content of mod_proxy_html.c
file:

memmove(ctx->buf+offs+s_to, ctx->buf+offs+s_from,
                            len + 1 - s_from - offs);

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #5 from chenkaifeng <[hidden email]> ---
(gdb) info locals
m = 0x135de48
found = <optimized out>
s_from = 34
s_to = 57
match = <optimized out>
c = 0 '\000'
pmatch = {{rm_so = 540, rm_eo = 574}, {rm_so = -1, rm_eo = -1}, {rm_so = -1,
rm_eo = -1}, {rm_so = -1, rm_eo = -1}, {rm_so = -1, rm_eo = -1}, {rm_so = -1,
rm_eo = -1}, {rm_so = -1, rm_eo = -1}, {
    rm_so = -1, rm_eo = -1}, {rm_so = -1, rm_eo = -1}, {rm_so = -1, rm_eo =
-1}}
subs = 0x1380998 "href='https://192.168.1.170:20026/Yarn/ResourceManager/41"
len = 2142171
offs = 299613
themap = <optimized out>
verbose = 0

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #6 from chenkaifeng <[hidden email]> ---
And below is error_log

[Fri Nov 29 17:26:02.136858 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:prog, next:ress.
[Fri Nov 29 17:26:02.136863 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136867 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136872 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:ui, next:ress.
[Fri Nov 29 17:26:02.136877 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136881 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136886 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:blac, next:klis.
[Fri Nov 29 17:26:02.136890 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136895 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136899 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136904 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:\n   , next:    .
[Fri Nov 29 17:26:02.136912 2019] [proxy_html:info] [pid 6193:tid
139890451052288] [client 192.168.1.33:49206] pcharacters, cur:text, next:/jav.
[Fri Nov 29 17:26:02.163055 2019] [proxy:debug] [pid 6193:tid 139890451052288]
proxy_util.c(2171): AH00943: HTTP: has released connection for (*)
[Fri Nov 29 17:26:02.163117 2019] [proxy:debug] [pid 6193:tid 139890451052288]
proxy_util.c(2994): [remote 192.168.1.210:8088] AH02642: proxy: connection
shutdown
[Fri Nov 29 17:26:02.803371 2019] [core:notice] [pid 1339:tid 139890576172864]
AH00051: child pid 6193 exit signal Segmentation fault (11), possible coredump
in /opt/Bigdata/Apache-httpd-2.4.26/apache2

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #7 from chenkaifeng <[hidden email]> ---
have found the root cause as misconfig of proxy-html.conf

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

chenkaifeng <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]

Reply | Threaded
Open this post in threaded view
|

[Bug 63977] AH00051: child pid 31483 exit signal Segmentation fault mod_proxy_html.c

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63977

--- Comment #8 from Christophe JAILLET <[hidden email]> ---
Nice to see that you have found the root cause.

Could you share the incorrect configuration that trigger the issue?
The module should not crash only because of an incorrect config. Maybe we could
issue some warning during configuration parsing, or log something at run-time.

Crashing is not really user-friendly :)

--
You are receiving this mail because:
You are the assignee for the bug.
---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]