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libc: check path pointer in 'symlink' and 'unlink'

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Fixes #4688
This commit is contained in:
Christian Prochaska 2022-11-20 07:12:31 +01:00 committed by Christian Helmuth
parent 132906c925
commit 5d62429164
1 changed files with 6 additions and 0 deletions
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6
repos/libports/src/lib/libc/file_operations.cc
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@ -721,6 +721,9 @@ extern "C" int stat(const char *path, struct stat *buf)
extern "C" int symlink(const char *oldpath, const char *newpath) extern "C" int symlink(const char *oldpath, const char *newpath)
{ {
if (!oldpath || !newpath)
return Errno(EFAULT);
try { try {
Absolute_path resolved_path; Absolute_path resolved_path;
resolve_symlinks_except_last_element(newpath, resolved_path); resolve_symlinks_except_last_element(newpath, resolved_path);
@ -733,6 +736,9 @@ extern "C" int symlink(const char *oldpath, const char *newpath)
extern "C" int unlink(const char *path) extern "C" int unlink(const char *path)
{ {
if (!path)
return Errno(EFAULT);
try { try {
Absolute_path resolved_path; Absolute_path resolved_path;
resolve_symlinks_except_last_element(path, resolved_path); resolve_symlinks_except_last_element(path, resolved_path);