From: Jan Kara jack@suse.cz
commit 65db869c754e7c271691dd5feabf884347e694f5 upstream.
Estimate for the number of credits needed for final freeing of inode in ext4_evict_inode() was to small. We may modify 4 blocks (inode & sb for orphan deletion, bitmap & group descriptor for inode freeing) and not just 3.
[ Fixed minor whitespace nit. -- TYT ]
Fixes: e50e5129f384 ("ext4: xattr-in-inode support") CC: stable@vger.kernel.org Signed-off-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20191105164437.32602-6-jack@suse.cz Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ext4/inode.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
--- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -195,7 +195,12 @@ void ext4_evict_inode(struct inode *inod { handle_t *handle; int err; - int extra_credits = 3; + /* + * Credits for final inode cleanup and freeing: + * sb + inode (ext4_orphan_del()), block bitmap, group descriptor + * (xattr block freeing), bitmap, group descriptor (inode freeing) + */ + int extra_credits = 6; struct ext4_xattr_inode_array *ea_inode_array = NULL;
trace_ext4_evict_inode(inode); @@ -251,8 +256,12 @@ void ext4_evict_inode(struct inode *inod if (!IS_NOQUOTA(inode)) extra_credits += EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb);
+ /* + * Block bitmap, group descriptor, and inode are accounted in both + * ext4_blocks_for_truncate() and extra_credits. So subtract 3. + */ handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, - ext4_blocks_for_truncate(inode)+extra_credits); + ext4_blocks_for_truncate(inode) + extra_credits - 3); if (IS_ERR(handle)) { ext4_std_error(inode->i_sb, PTR_ERR(handle)); /*