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| author | Roman Arutyunyan <arut@nginx.com> | 2017-07-04 18:07:29 +0300 |
|---|---|---|
| committer | Roman Arutyunyan <arut@nginx.com> | 2017-07-04 18:07:29 +0300 |
| commit | 7570718594d846787ca31914e0f8431d7a4cfad1 (patch) | |
| tree | 3e29a0d3f4f492bd41f11b4f4fea79a5de17f08e /src/http/ngx_http_request.c | |
| parent | 32e3d0e693b6520d0e087160519d173bb102f906 (diff) | |
| download | nginx-7570718594d846787ca31914e0f8431d7a4cfad1.tar.gz nginx-7570718594d846787ca31914e0f8431d7a4cfad1.tar.bz2 | |
Resolver: fixed possible use-after-free while resolving SRV.
Resolving an SRV record includes resolving its host names in subrequests.
Previously, if memory allocation failed while reporting a subrequest result
after receiving a response from a DNS server, the SRV resolve handler was
called immediately with the NGX_ERROR state. However, if the SRV record
included another copy of the resolved name, it was reported once again.
This could trigger the use-after-free memory access after SRV resolve
handler freed the resolve context by calling ngx_resolve_name_done().
Now the SRV resolve handler is called only when all its subrequests are
completed.
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions