Description
In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.
Product status
626860c470ff88e5f7f22a282efd1bfe953a1b54 before 9c439311c13fc6faab1921441165c9b8b500c83b
e9109a92d2a95889498bed3719cd2318892171a2 before fe2ead240c31e8d158713beca9d0681a6e6a53ab
e9109a92d2a95889498bed3719cd2318892171a2 before 40d7b3ed52449d36143bab8d3e70926aa61a60f4
e9109a92d2a95889498bed3719cd2318892171a2 before 27ab33854873e6fb958cb074681a0107cc2ecc4c
6.3
Any version before 6.3
6.6.44
6.10.3
6.11
References
git.kernel.org/...c/9c439311c13fc6faab1921441165c9b8b500c83b
git.kernel.org/...c/fe2ead240c31e8d158713beca9d0681a6e6a53ab
git.kernel.org/...c/40d7b3ed52449d36143bab8d3e70926aa61a60f4
git.kernel.org/...c/27ab33854873e6fb958cb074681a0107cc2ecc4c
