The formatting of the error buffer is race prone. It uses static buffers for both formatting and output. While overwriting the error buffer can product garbled output, overwriting the format buffer with incompatible % directives can cause crashes. Signed-off-by: Jeff Mahoney --- fs/reiserfs/prints.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/fs/reiserfs/prints.c +++ b/fs/reiserfs/prints.c @@ -184,7 +184,7 @@ static char *is_there_reiserfs_struct(ch printk ("bad key %lu %lu %lu %lu", key->k_dir_id, key->k_objectid, key->k_offset, key->k_uniqueness); */ - +static DEFINE_SPINLOCK(error_lock); static void prepare_error_buf(const char *fmt, va_list args) { char *fmt1 = fmt_buf; @@ -192,6 +192,8 @@ static void prepare_error_buf(const char char *p = error_buf; int what; + spin_lock(&error_lock); + strcpy(fmt1, fmt); while ((k = is_there_reiserfs_struct(fmt1, &what)) != NULL) { @@ -237,6 +239,7 @@ static void prepare_error_buf(const char fmt1 = k + 2; } vsprintf(p, fmt1, args); + spin_unlock(&error_lock); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/