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Bug #78342 Bus error in configure test for iconv //IGNORE
Submitted: 2019-07-28 18:46 UTC Modified: 2019-07-29 06:48 UTC
From: rainer dot jung at kippdata dot de Assigned: cmb (profile)
Status: Closed Package: *Compile Issues
PHP Version: 7.2Git-2019-07-29 (Git) OS: Solaris 10 Sparc
Private report: No CVE-ID: None
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From: rainer dot jung at kippdata dot de
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 [2019-07-28 18:46 UTC] rainer dot jung at kippdata dot de
The configure test for iconv //IGNORE results in a Bus error on Solaris 10 Sparc.

It occurs on recent 7.4 beta, but also in current 7.2 and probably dates back much further.

The crash is due to the following snippet in file ext/iconv/config.m4:

int main() {
  iconv_t cd = iconv_open( "UTF-8//IGNORE", "UTF-8" );
=> no check for result of iconv_open here!
  char *in_p = "\xC3\xC3\xC3\xB8";
  size_t in_left = 4, out_left = 4096;
  char *out = malloc(out_left);
  char *out_p = out;
  size_t result = iconv(cd, (char **) &in_p, &in_left, (char **) &out_p, &out_left);
  if(result == (size_t)-1) {
    return 1;
  return 0;

Test script:
Run configure on Solaris 10 Sparc. config.log shows:

configure:37401: checking if iconv supports //IGNORE
configure:37435: ./conftest
./configure[20]: 4274 Bus Error(coredump)
configure:37435: $? = 138
configure: program exited with status 138


php-configure-iconv-ignore.patch (last revision 2019-07-28 18:46 UTC by rainer dot jung at kippdata dot de)

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 [2019-07-28 18:46 UTC] rainer dot jung at kippdata dot de
The following patch has been added/updated:

Patch Name: php-configure-iconv-ignore.patch
Revision:   1564339610
 [2019-07-29 06:48 UTC]
-Status: Open +Status: Verified -PHP Version: 7.4.0beta1 +PHP Version: 7.2Git-2019-07-29 (Git) -Assigned To: +Assigned To: cmb
 [2019-07-29 06:48 UTC]
Thanks for reporting this issue and providing a patch.  Since this
is certainly a bug, the fix should target PHP-7.2.
 [2019-07-29 06:52 UTC]
Automatic comment on behalf of
Log: Fix #78342: Bus error in configure test for iconv //IGNORE
 [2019-07-29 06:52 UTC]
-Status: Verified +Status: Closed
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