From: Steven Whitehouse Date: Fri, 12 Feb 2010 10:10:55 +0000 (+0000) Subject: GFS2: Fix bmap allocation corner-case bug X-Git-Tag: v5.15~30662^2 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=07ccb7bf2c928fef4fea2cda69ba2e23479578db;p=mirror_ubuntu-kernels.git GFS2: Fix bmap allocation corner-case bug This patch solves a corner case during allocation which occurs if both metadata (indirect) and data blocks are required but there is an obstacle in the filesystem (e.g. a resource group header or another allocated block) such that when the allocation is requested only enough blocks for the metadata are returned. By changing the exit condition of this loop, we ensure that a minimum of one data block will always be returned. Signed-off-by: Steven Whitehouse --- diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 6d47379e794b..583e823307ae 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -541,7 +541,7 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock, *ptr++ = cpu_to_be64(bn++); break; } - } while (state != ALLOC_DATA); + } while ((state != ALLOC_DATA) || !dblock); ip->i_height = height; gfs2_add_inode_blocks(&ip->i_inode, alloced);