From 2c6b5a84257379e516ca1999782dca88dfd8a9de Mon Sep 17 00:00:00 2001 From: Anastasia Belova Date: Wed, 29 Mar 2023 13:09:02 +0300 Subject: [PATCH] storage_file_probe: change maximum len value in vmdk4GetBackingStore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit desc length should be always less than VIR_STORAGE_MAX_HEADER. If len = VIR_STORAGE_MAX_HEADER, desc may be out of bounds. Fixes: 296032bfb2 ("util: extract storage file probe code into virtstoragefileprobe.c") Signed-off-by: Anastasia Belova Reviewed-by: Ján Tomko --- src/storage_file/storage_file_probe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/storage_file/storage_file_probe.c b/src/storage_file/storage_file_probe.c index 9465af5d96..0dcc9c2c54 100644 --- a/src/storage_file/storage_file_probe.c +++ b/src/storage_file/storage_file_probe.c @@ -586,8 +586,8 @@ vmdk4GetBackingStore(char **res, return BACKING_STORE_INVALID; len = buf_size - 0x200; - if (len > VIR_STORAGE_MAX_HEADER) - len = VIR_STORAGE_MAX_HEADER; + if (len >= VIR_STORAGE_MAX_HEADER) + len = VIR_STORAGE_MAX_HEADER - 1; memcpy(desc, buf + 0x200, len); desc[len] = '\0'; start = strstr(desc, prefix);