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Merge pull request #990 from 94xhn/fix/vfs-fs-stat-buffer-overflow

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Fix stack buffer overflow in vfs.c fs_stat()
This commit is contained in:
Terje Io
2026-07-21 21:23:27 +02:00
committed by GitHub
parent c84cda0430 77027abbb9
commit b9a05f146b
1 changed files with 11 additions and 2 deletions
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vfs.c
+11 -2
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@@ -151,10 +151,19 @@ static void fs_closedir (vfs_dir_t *dir)
static int fs_stat (const char *filename, vfs_stat_t *st)
{
char path[64];
char path[64], *fpath = path;
vfs_mount_t *mount;
size_t len = strlen(filename) + 2; // leading '/' + terminating '\0'
if((mount = path_is_mount_dir(strcat(strcpy(path, "/"), filename)))) {
if(len > sizeof(path) && (fpath = malloc(len)) == NULL)
return (vfs_errno = -1);
mount = path_is_mount_dir(strcat(strcpy(fpath, "/"), filename));
if(fpath != path)
free(fpath);
if(mount) {
if(!(mount->vfs->fstat && (vfs_errno = mount->vfs->fstat("/", st) == 0))) {