commit 357b465b42691d845de2b6ceceb847c2db85ffb8 Author: David Goulet dgoulet@ev0ke.net Date: Fri Aug 23 19:08:05 2013 -0400
Deny unsupported syscall() number for safety
Until we support all possible syscall() number, relevant to network communication, we deny them for now just to be safe.
Signed-off-by: David Goulet dgoulet@ev0ke.net --- src/lib/syscall.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/lib/syscall.c b/src/lib/syscall.c index 5cb9e8f..c2cd114 100644 --- a/src/lib/syscall.c +++ b/src/lib/syscall.c @@ -84,7 +84,14 @@ LIBC_SYSCALL_RET_TYPE tsocks_syscall(long int __number, va_list args) ret = handle_close(args); break; default: - ret = tsocks_libc_syscall(__number, args); + /* + * Deny call since we have no idea if this call can leak or not data + * off the Tor network. + */ + WARN("[syscall] Unsupported syscall number %ld. Denying the call", + __number); + ret = -1; + errno = ENOSYS; break; }