In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix possible data races in gfs2showoptions() Some fields such as gtlogdsecs of the struct gfs2tune are accessed without holding the lock gtspin in gfs2showoptions(): val = sdp->sdtune.gtlogdsecs; if (val != 30) seqprintf(s, ",commit=%d", val); And thus can cause data races when gfs2showoptions() and other functions such as gfs2reconfigure() are concurrently executed: spinlock(>->gtspin); gt->gtlogdsecs = newargs->arcommit; To fix these possible data races, the lock sdp->sdtune.gtspin is acquired before accessing the fields of gfs2tune and released after these accesses. Further changes by Andreas: - Don't hold the spin lock over the seqprintf operations.