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Fix a segfault during startup

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If unix socket was configured as listener (such as a ControlSocket or a
SocksPort unix socket), and tor was started as root but not configured
to switch to another user, tor would segfault while trying to string
compare a NULL value.  Fixes bug 18261; bugfix on 0.2.8.1-alpha. Patch
by weasel.
This commit is contained in:
Peter Palfrader 2016-02-06 22:17:02 +01:00
parent 2d879bd39f
commit 42e131e9ac
2 changed files with 7 additions and 1 deletions
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6
changes/bug18261 Normal file
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@ -0,0 +1,6 @@
o Minor features (crypto):
- Fix a segfault during startup: If unix socket was configured as
listener (such as a ControlSocket or a SocksPort unix socket), and
tor was started as root but not configured to switch to another
user, tor would segfault while trying to string compare a NULL
value. Fixes bug 18261; bugfix on 0.2.8.1-alpha. Patch by weasel.

2
src/or/connection.c
View File

@ -2398,7 +2398,7 @@ retry_listener_ports(smartlist_t *old_conns,
/* We don't need to be root to create a UNIX socket, so defer until after
* setuid. */
const or_options_t *options = get_options();
if (port->is_unix_addr && !geteuid() && strcmp(options->User, "root"))
if (port->is_unix_addr && !geteuid() && (options->User) && strcmp(options->User, "root"))
continue;
#endif