diff options
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 55582bd6665..8a0f044750c 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -337,7 +337,12 @@ xfs_iomap_prealloc_size( int shift = 0; int64_t freesp; - alloc_blocks = XFS_B_TO_FSB(mp, ip->i_size); + /* + * rounddown_pow_of_two() returns an undefined result + * if we pass in alloc_blocks = 0. Hence the "+ 1" to + * ensure we always pass in a non-zero value. + */ + alloc_blocks = XFS_B_TO_FSB(mp, ip->i_size) + 1; alloc_blocks = XFS_FILEOFF_MIN(MAXEXTLEN, rounddown_pow_of_two(alloc_blocks)); |