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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-06-18 16:05:18 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-07-06 17:39:42 -0400 |
| commit | 97e0f8f87c918620689ce542664a3115b752649d (patch) | |
| tree | 36e273e55397ebe7b11a91041883703ade4aa0e9 /fs/ufs | |
| parent | 42432739b5902f72011f701f5cd5b4227ebe991c (diff) | |
| download | linux-97e0f8f87c918620689ce542664a3115b752649d.tar.gz | |
ufs_trunc_branch(): never call with offsets != NULL && depth2 == 0
For calls in __ufs_truncate_blocks() it's just a matter of not incrementing offsets[0] and not making that call - immediately following loop will be executed one extra time and we'll be just fine. For recursive call in ufs_trunc_branch() itself, just assing NULL to offsets if we would be about to make such call. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ufs')
| -rw-r--r-- | fs/ufs/inode.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index 285eacd02d60..9e409c12afdf 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -1075,7 +1075,7 @@ static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2, struct ufs_inode_info *ufsi = UFS_I(inode); struct ufs_buffer_head *ubh; u64 tmp; - bool free_it = !offsets || !depth2; + bool free_it = !offsets; unsigned from = offsets ? *offsets++ : 0; unsigned i; @@ -1091,9 +1091,11 @@ static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2, } if (--depth) { + if (!--depth2) + offsets = NULL; for (i = from ; i < uspi->s_apb ; i++, offsets = NULL) { void *ind = ubh_get_data_ptr(uspi, ubh, i); - ufs_trunc_branch(inode, offsets, depth2 - 1, depth, ind); + ufs_trunc_branch(inode, offsets, depth2, depth, ind); ubh_mark_buffer_dirty(ubh); } } else { @@ -1237,7 +1239,8 @@ static void __ufs_truncate_blocks(struct inode *inode) ufs_trunc_direct(inode); offsets[0] = UFS_IND_BLOCK; } else { - ufs_trunc_branch(inode, offsets + 1, depth2, depth - 1, + if (depth2) + ufs_trunc_branch(inode, offsets + 1, depth2, depth - 1, ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++)); } for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { |