Skip to content

Fix double-free on wolfSSH_SFTPNAME_readdir #806

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
SparkiDev merged 1 commit into from
May 21, 2025
Merged

Fix double-free on wolfSSH_SFTPNAME_readdir #806

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 10 additions & 4 deletions src/wolfsftp.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3228,12 +3228,16 @@ static int wolfSSH_SFTPNAME_readdir(WOLFSSH* ssh, WDIR* dir, WS_SFTPNAME* out,
>= (int)sizeof(r)) {
WLOG(WS_LOG_SFTP, "Path length too large");
WFREE(out->fName, out->heap, DYNTYPE_SFTP);
out->fName = NULL;
out->fSz = 0;
return WS_FATAL_ERROR;
}

if (wolfSSH_RealPath(ssh->sftpDefaultPath, r, s, sizeof(s)) < 0) {
WFREE(out->fName, out->heap, DYNTYPE_SFTP);
WLOG(WS_LOG_SFTP, "Error cleaning path to get attributes");
out->fName = NULL;
out->fSz = 0;
return WS_FATAL_ERROR;
}

Expand All @@ -3248,6 +3252,8 @@ static int wolfSSH_SFTPNAME_readdir(WOLFSSH* ssh, WDIR* dir, WS_SFTPNAME* out,
if (SFTP_CreateLongName(out) != WS_SUCCESS) {
WLOG(WS_LOG_DEBUG, "Error creating long name for %s", out->fName);
WFREE(out->fName, out->heap, DYNTYPE_SFTP);
out->fName = NULL;
out->fSz = 0;
return WS_FATAL_ERROR;
}

Expand Down Expand Up @@ -3976,7 +3982,7 @@ int wolfSSH_SFTP_RecvClose(WOLFSSH* ssh, int reqId, byte* data, word32 maxSz)
if (sz == sizeof(WFD)) {
WMEMSET((byte*)&fd, 0, sizeof(WFD));
WMEMCPY((byte*)&fd, data + idx, sz);

#ifdef MICROCHIP_MPLAB_HARMONY
ret = WFCLOSE(ssh->fs, &fd);
#else
Expand Down Expand Up @@ -5003,7 +5009,7 @@ int SFTP_GetAttributes(void* fs, const char* fileName, WS_SFTP_FILEATRB* atr,
{
WOLFSSH_UNUSED(heap);
WOLFSSH_UNUSED(fs);

return SFTP_GetAttributesHelper(atr, fileName);
}

Expand All @@ -5028,7 +5034,7 @@ int SFTP_GetAttributes_Handle(WOLFSSH* ssh, byte* handle, int handleSz,
WLOG(WS_LOG_SFTP, "Unknown handle");
return WS_BAD_FILE_E;
}

return SFTP_GetAttributesHelper(atr, cur->name);
}

Expand Down Expand Up @@ -8844,7 +8850,7 @@ int wolfSSH_SFTP_Get(WOLFSSH* ssh, char* from,
if (state->gOfst[0] > 0 || state->gOfst[1] > 0)
ret = WFOPEN(ssh->fs, &state->fl, to, WOLFSSH_O_APPEND);
else
ret = WFOPEN(ssh->fs, &state->fl, to, WOLFSSH_O_WRONLY);
ret = WFOPEN(ssh->fs, &state->fl, to, WOLFSSH_O_WRONLY);
#elif defined(USE_WINDOWS_API)
{
DWORD desiredAccess = GENERIC_WRITE;
Expand Down