diff options
| author | Arseniy Lartsev <arseniy@alumni.chalmers.se> | 2020-01-07 18:34:39 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2020-01-13 18:34:36 +0300 |
| commit | 4ddf5903fd24feaa6f75ffb12f9cafdd266b386a (patch) | |
| tree | 461a8260e4d9955a3cb12e43d1e5b2f55f819a80 | |
| parent | 7b6414d459bb66affe077a062b88ca1e1e392fc4 (diff) | |
Fixed crash on wine by adding NULL check after memchr
This is not a joke, there are vendors out there who build software for cygwin
only. Besides, this NULL check is good to have anyway.
| -rw-r--r-- | winsup/cygwin/path.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc index b5efd61b2..c8e73c64c 100644 --- a/winsup/cygwin/path.cc +++ b/winsup/cygwin/path.cc @@ -4307,6 +4307,8 @@ find_fast_cwd_pointer () const uint8_t *use_cwd = rcall + 5 + offset; /* Find first `push %edi' instruction. */ const uint8_t *pushedi = (const uint8_t *) memchr (use_cwd, 0x57, 32); + if (!pushedi) + return NULL; /* ...which should be followed by `mov crit-sect-addr,%edi' then `push %edi', or by just a single `push crit-sect-addr'. */ const uint8_t *movedi = pushedi + 1; |