From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx> commit d6abecb82573fed5f7e4b595b5c0bd37707d2848 upstream. Range check the region counter when we're reassembling regions from log items during log recovery. In the old days ASSERT would halt the kernel, but this isn't true any more so we have to make an explicit error return. Coverity-id: 1132508 Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx> Signed-off-by: Chandan Babu R <chandan.babu@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/xfs/xfs_log_recover.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -4293,7 +4293,16 @@ xlog_recover_add_to_trans( kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), 0); } - ASSERT(item->ri_total > item->ri_cnt); + + if (item->ri_total <= item->ri_cnt) { + xfs_warn(log->l_mp, + "log item region count (%d) overflowed size (%d)", + item->ri_cnt, item->ri_total); + ASSERT(0); + kmem_free(ptr); + return -EFSCORRUPTED; + } + /* Description region is ri_buf[0] */ item->ri_buf[item->ri_cnt].i_addr = ptr; item->ri_buf[item->ri_cnt].i_len = len;