[Bug 998256] Re: regcomp fails with custom malloc

[Robert Vollmert]

** Description changed:

  regcomp fails to compile the regular expression "^ " with memory error
- if malloc(0) returns NULL. That's valid malloc behavior, compare
- malloc(3).
+ if malloc(0) returns NULL. That's valid malloc behavior, compare the man
+ page malloc(3).
  
  I had a little trouble debugging, but I believe the problem lies with
- posix/regex_internal.c:re_node_set_alloc being called with size == 0.
+ posix/regex_internal.c:re_node_set_alloc being called with size == 0,
+ and then treating the zero return value as an error.
  
  I'm attaching a test program that should exhibit the bug.
  
  ETA: I've tested this with libc6_2.15-0ubuntu10_amd64 under VMWare.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to eglibc in Ubuntu.
https://bugs.launchpad.net/bugs/998256

Title:
  regcomp fails with custom malloc

Status in “eglibc” package in Ubuntu:
  New

Bug description:
  regcomp fails to compile the regular expression "^ " with memory error
  if malloc(0) returns NULL. That's valid malloc behavior, compare the
  man page malloc(3).

  I had a little trouble debugging, but I believe the problem lies with
  posix/regex_internal.c:re_node_set_alloc being called with size == 0,
  and then treating the zero return value as an error.

  I'm attaching a test program that should exhibit the bug.

  ETA: I've tested this with libc6_2.15-0ubuntu10_amd64 under VMWare.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/998256/+subscriptions