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Bug #73266 crash due to incorrect definition of variable storing return of libssh2_sftp_re
Submitted: 2016-10-07 16:21 UTC Modified: 2021-02-21 04:22 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: amorum at brendata dot co dot uk Assigned: cmb (profile)
Status: No Feedback Package: ssh2 (PECL)
PHP Version: 7.0.11 OS: any
Private report: No CVE-ID: None
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 [2016-10-07 16:21 UTC] amorum at brendata dot co dot uk 
Description:
------------
Attempting to ls from some servers results in a crash.

This is because the line

int bytesread = libssh2_sftp_readdir(data->handle, ent->d_name, sizeof(ent->d_name) - 1, NULL);

should really be
ssize_t bytesread = libssh2_sftp_readdir(data->handle, ent->d_name, sizeof(ent->d_name) - 1, NULL);

This was already fixed once, but it seems to have been reverted, see:

http://git.php.net/?p=pecl/networking/ssh2.git;a=commitdiff;h=2509998d3750cfaa026dfcf50cbbede24b796b6c

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 [2016-10-08 09:25 UTC] cmb@php.net 
Actually, libssh2_sftp_readdir() is supposed to return an int[1].

Apparently, the problem must be somewhere else.

[1] <https://www.libssh2.org/libssh2_sftp_readdir.html>
 [2021-02-09 17:07 UTC] cmb@php.net
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2021-02-09 17:07 UTC] cmb@php.net 
That fix still looks good to me, so if you still experience the
reported segfaults, please provide a stack backtrace[1].

[1] <https://bugs.php.net/bugs-generating-backtrace.php>
 [2021-02-21 04:22 UTC] pecl-dev at lists dot php dot net 
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
 
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