tree 5ec37bda618f2030d2f555b063cc879420b911e4
parent 41ccb194d1d14669e0592e5373ef5776f099e82a
author Olivier Houchard <ohouchard@haproxy.com> 1518531443 +0100
committer Willy Tarreau <w@1wt.eu> 1518630268 +0100
encoding latin1

BUG/MEDIUM: ssl: Don't always treat SSL_ERROR_SYSCALL as unrecovarable.

Bart Geesink reported some random errors appearing under the form of
termination flags SD in the logs for connections involving SSL traffic
to reach the servers.

Tomek Gacek and Mateusz Malek finally narrowed down the problem to commit
c2aae74 ("MEDIUM: ssl: Handle early data with OpenSSL 1.1.1"). It happens
that the special case of SSL_ERROR_SYSCALL isn't handled anymore since
this commit.

SSL_read() might return <= 0, and SSL_get_erro() return SSL_ERROR_SYSCALL,
without meaning the connection is gone. Before flagging the connection
as in error, check the errno value.

This should be backported to 1.8.