diff options
| -rw-r--r-- | fs/xfs/xfs_fsops.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.c | 35 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.h | 1 | ||||
| -rw-r--r-- | fs/xfs/xfs_rtalloc.c | 4 |
4 files changed, 29 insertions, 13 deletions
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index b599e6be9ec1..25e5eae8a976 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -140,6 +140,8 @@ xfs_growfs_data_private( pct = in->imaxpct; if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) return XFS_ERROR(EINVAL); + if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) + return error; dpct = pct - mp->m_sb.sb_imax_pct; error = xfs_read_buf(mp, mp->m_ddev_targp, XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index a96bde6df96d..5de1f392e632 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -202,6 +202,27 @@ xfs_mount_free( kmem_free(mp, sizeof(xfs_mount_t)); } +/* + * Check size of device based on the (data/realtime) block count. + * Note: this check is used by the growfs code as well as mount. + */ +int +xfs_sb_validate_fsb_count( + xfs_sb_t *sbp, + __uint64_t nblocks) +{ + ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); + ASSERT(sbp->sb_blocklog >= BBSHIFT); + +#if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ + if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) + return E2BIG; +#else /* Limited by UINT_MAX of sectors */ + if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX) + return E2BIG; +#endif + return 0; +} /* * Check the validity of the SB found. @@ -284,18 +305,8 @@ xfs_mount_validate_sb( return XFS_ERROR(EFSCORRUPTED); } - ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); - ASSERT(sbp->sb_blocklog >= BBSHIFT); - -#if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ - if (unlikely( - (sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX || - (sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) { -#else /* Limited by UINT_MAX of sectors */ - if (unlikely( - (sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX || - (sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) { -#endif + if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || + xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { xfs_fs_mount_cmn_err(flags, "file system too large to be mounted on this system."); return XFS_ERROR(E2BIG); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 82304b94646d..871a5bfd8617 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -624,6 +624,7 @@ extern int xfs_sync_inodes(xfs_mount_t *, int, int *); extern xfs_agnumber_t xfs_initialize_perag(struct bhv_vfs *, xfs_mount_t *, xfs_agnumber_t); extern void xfs_xlatesb(void *, struct xfs_sb *, int, __int64_t); +extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); extern struct xfs_dmops xfs_dmcore_stub; extern struct xfs_qmops xfs_qmcore_stub; diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index b3a5f07bd073..47082c01872d 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -1882,11 +1882,13 @@ xfs_growfs_rt( (nrblocks = in->newblocks) <= sbp->sb_rblocks || (sbp->sb_rblocks && (in->extsize != sbp->sb_rextsize))) return XFS_ERROR(EINVAL); + if ((error = xfs_sb_validate_fsb_count(sbp, nrblocks))) + return error; /* * Read in the last block of the device, make sure it exists. */ error = xfs_read_buf(mp, mp->m_rtdev_targp, - XFS_FSB_TO_BB(mp, in->newblocks - 1), + XFS_FSB_TO_BB(mp, nrblocks - 1), XFS_FSB_TO_BB(mp, 1), 0, &bp); if (error) return error; |
