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Cygwin: path_conv::eq_worker: add NULL pointer checks 

Don't call cstrdup on NULL pointers.

This fixes a crash that was observed when cloning an fhandler whose
path_conv member had freed its strings.
This commit is contained in:
Ken Brown 2020-11-14 09:02:43 -05:00
parent 140b0a6484
commit 22d1ebacfc
1 changed files with 4 additions and 2 deletions
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6
winsup/cygwin/path.h
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@ -320,9 +320,11 @@ class path_conv
contrast to statically allocated strings. Calling device::dup()
will duplicate the string if the source was allocated. */
dev.dup ();
path = cstrdup (in_path);
if (in_path)
path = cstrdup (in_path);
conv_handle.dup (pc.conv_handle);
posix_path = cstrdup(pc.posix_path);
if (pc.posix_path)
posix_path = cstrdup(pc.posix_path);
if (pc.wide_path)
{
wide_path = cwcsdup (uni_path.Buffer);