Bug #77590 [Com]: SIGSEGV in zend_hash_str_find_bucket

From: Date: Mon, 11 Feb 2019 17:17:42 +0000
Subject: Bug #77590 [Com]: SIGSEGV in zend_hash_str_find_bucket
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-219506@lists.php.net to get a copy of this message
Edit report at https://bugs.php.net/bug.php?id=77590&edit=1

 ID:                 77590
 Comment by:         gravydish at gmail dot com
 Reported by:        gravydish at gmail dot com
 Summary:            SIGSEGV in zend_hash_str_find_bucket
 Status:             Open
 Type:               Bug
 Package:            Built-in web server
 Operating System:   Fedora 29
 PHP Version:        7.2.15
 Block user comment: N
 Private report:     N

 New Comment:

I wanted to add that I am able to observe the same SIGSEGV on the same request on the version of PHP
that ships with MacOS, 7.1.23.


Previous Comments:
------------------------------------------------------------------------
[2019-02-08 20:51:01] gravydish at gmail dot com

Description:
------------
This is on PHP 7.2.14, I will retest with 7.2.15 when it is available for Fedora. However, according
to the release notes, I do not see this particular issue addressed in 7.2.15.

I get a SIGSEGV and this backtrace for rendering a particular page in my software. I have not been
able to narrow it down to a specific line of PHP code yet, but reviewing the PHP source code
referenced from the backtrace, it seems to be originating outside of PHP interpretation.

Following the backtrace, I see that the zend_hash_str_find_bucket function is inlined,
so it must be one of the lines of the inlined function which is failing some assumption, but
I'm currently unable to provide a more-specific backtrace.

What can I do to provide better direction for this bug?

Cheers,
Jared

Actual result:
--------------
#0  0x0000555555820153 in zend_hash_str_find_bucket (h=9223372037048248209, len=3,
str=0x5555558c29aa "UTC", 
    ht=0x7ffff6e04738) at /usr/src/debug/php-7.2.14-1.fc29.x86_64/Zend/zend_hash.c:1971
#1  zend_hash_str_find (ht=0x7ffff6e04738, str=0x5555558c29aa "UTC", len=3)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/Zend/zend_hash.c:1971
#2  0x0000555555668220 in zend_hash_str_find_ptr (len=<optimized out>, str=0x5555558c29aa
"UTC", ht=<optimized out>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/Zend/zend_hash.h:753
#3  php_date_parse_tzfile (formal_tzname=0x5555558c29aa "UTC", tzdb=0x555555bb2fd0)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/ext/date/php_date.c:949
#4  0x000055555566a0ce in get_timezone_info () at
/usr/src/debug/php-7.2.14-1.fc29.x86_64/ext/date/php_date.c:1028
#5  0x000055555566b4b8 in php_format_date (format=format@entry=0x55555592010c "r",
format_len=format_len@entry=1, 
    ts=1549653057, localtime=localtime@entry=1) at
/usr/src/debug/php-7.2.14-1.fc29.x86_64/ext/date/php_date.c:1283
#6  0x00005555558b87c0 in append_essential_headers (buffer=buffer@entry=0x7fffffffc1b0,
client=client@entry=0x555555b10360, 
    persistent=persistent@entry=1) at
/usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:359
#7  0x00005555558bb824 in php_cli_server_begin_send_static (client=0x555555b10360,
server=0x555555a2edc0 <server>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2043
#8  php_cli_server_dispatch (client=0x555555b10360, server=0x555555a2edc0 <server>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2184
#9  php_cli_server_recv_event_read_request (server=0x555555a2edc0 <server>,
client=0x555555b10360)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2379
#10 0x00005555558bbdf4 in php_cli_server_do_event_for_each_fd_callback
(_params=_params@entry=0x7fffffffc300, fd=fd@entry=5, 
    event=event@entry=1) at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2462
#11 0x00005555558bca1b in php_cli_server_poller_iter_on_active (poller=0x555555a2edc8
<server+8>, 
    callback=0x5555558bbda0 <php_cli_server_do_event_for_each_fd_callback>,
opaque=0x7fffffffc300)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:846
#12 php_cli_server_do_event_for_each_fd (whandler=0x5555558b9d90 <php_cli_server_send_event>, 
    rhandler=0x5555558bb520 <php_cli_server_recv_event_read_request>, server=0x555555a2edc0
<server>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2480
#13 php_cli_server_do_event_loop (server=0x555555a2edc0 <server>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2490
#14 do_cli_server (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli_server.c:2612
#15 0x0000555555661b18 in main (argc=3, argv=0x555555a4ae50)
    at /usr/src/debug/php-7.2.14-1.fc29.x86_64/sapi/cli/php_cli.c:1406


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