[LU-15329] Possible integer overflow in quota_read_blk

Tue, 7 Dec 2021 03:56:45 +0000

In osd-ldiskfs quota_read_blk we have this bit:

        ret = sb->s_op->quota_read(sb, type, buf, LUSTRE_DQBLKSIZE,
                                   blk << LUSTRE_DQBLKSIZE_BITS);

where blk is uint and LUSTRE_DQBLKSIZE_BITS is 10. the last quota_read argument is loff_t, as such cast to some 64 bit type seems warranted to avoid a potential overflow.

Whamcloud Community JIRA

[LU-15329] Possible integer overflow in quota_read_blk