CVE-2024-49902 jfs: check if leafidx greater than num leaves per dmap tree

In the Linux kernel, the following vulnerability has been resolved: jfs: check if leafidx greater than num leaves per dmap tree syzbot report a out of bounds in dbSplit, it because dmtleafidx greater than num leaves per dmap tree, add a checking for dmtleafidx in dbFindLeaf. Shaggy: Modified sani...

CVE-2024-49902

CVE-2024-49902 relates to a Linux kernel vulnerability in JFS where a leaf index (dmt_leafidx) could cause an out-of-bounds in dbSplit when the number of leaves per dmap tree is exceeded. The fix adds a check for dmt_leafidx in dbFindLeaf and expands the sanity checks to apply to control pages as...