diff options
| -rw-r--r-- | block/file-posix.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index d7fb772c14..a2f6d8a8c8 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2114,7 +2114,12 @@ static int find_allocation(BlockDriverState *bs, off_t start, if (offs < 0) { return -errno; /* D3 or D4 */ } - assert(offs >= start); + + if (offs < start) { + /* This is not a valid return by lseek(). We are safe to just return + * -EIO in this case, and we'll treat it like D4. */ + return -EIO; + } if (offs > start) { /* D2: in hole, next data at offs */ @@ -2146,7 +2151,12 @@ static int find_allocation(BlockDriverState *bs, off_t start, if (offs < 0) { return -errno; /* D1 and (H3 or H4) */ } - assert(offs >= start); + + if (offs < start) { + /* This is not a valid return by lseek(). We are safe to just return + * -EIO in this case, and we'll treat it like H4. */ + return -EIO; + } if (offs > start) { /* |