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cd: fix an invalid free() call (Solaris patch 211-21547336)

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This change is pulled from here:
https://github.com/oracle/solaris-userland/blob/master/components/ksh93/patches/211-21547336.patch

src/cmd/ksh93/bltins/cd_pwd.c: b_cd():
- The functions path_pwd() and path_relative() in sh/path.c may
  return a pointer to e_dot[] (".") as a fallback if they fail to
  determine a path. This is a string in read-only memory
  (data/msg.c), so must not be freed. A pointer to that string may
  end up in sh.pwd (== shp->pwd), so b_cd() needs a check for that.
This commit is contained in:
Martijn Dekker 2021-01-08 12:32:56 +00:00
parent ad9ea0ba7d
commit a3ccff6c75
1 changed files with 1 additions and 1 deletions
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2
src/cmd/ksh93/bltins/cd_pwd.c
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@ -212,7 +212,7 @@ success:
nv_scan(sh_subtracktree(1),rehash,(void*)0,NV_TAGGED,NV_TAGGED);
path_newdir(shp,shp->pathlist);
path_newdir(shp,shp->cdpathlist);
if(oldpwd)
if(oldpwd && oldpwd!=e_dot)
free(oldpwd);
return(0);
}