From f0b2132b35248c1f4a80f62a2c38cddcc802aa8c Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Fri, 28 Jun 2019 10:12:50 +0200 Subject: ld.so: Support moving versioned symbols between sonames [BZ #24741] This change should be fully backwards-compatible because the old code aborted the load if a soname mismatch was encountered (instead of searching further for a matching symbol). This means that no different symbols are found. The soname check was explicitly disabled for the skip_map != NULL case. However, this only happens with dl(v)sym and RTLD_NEXT, and those lookups do not come with a verneed entry that could be used for the check. The error check was already explicitly disabled for the skip_map != NULL case, that is, when dl(v)sym was called with RTLD_NEXT. But _dl_vsym always sets filename in the struct r_found_version argument to NULL, so the check was not active anyway. This means that symbol lookup results for the skip_map != NULL case do not change, either. --- NEWS | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'NEWS') diff --git a/NEWS b/NEWS index 650b81a..6c7de10 100644 --- a/NEWS +++ b/NEWS @@ -34,6 +34,12 @@ Major new features: pointer subtraction within the allocated object, where results might overflow the ptrdiff_t type. +* The dynamic linker no longer refuses to load objects which reference + versioned symbols whose implementation has moved to a different soname + since the object has been linked. The old error message, symbol + FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with + link time reference, is gone. + Deprecated and removed features, and other changes affecting compatibility: * The copy_file_range function fails with ENOSYS if the kernel does not -- cgit v1.1