Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix uninitialized return value in netfs_unbuffered_write() If preparation of the first subrequest fails, netfs_unbuffered_write() exits its loop before ret is initialized. The empty-iterator check can do the same. For synchronous writes, netfs_unbuffered_write_iter_locked() may then return an unrelated error instead of wreq->error. This is reachable through CIFS if cifs_prepare_write() fails to reopen the file or obtain credits. Initialize ret to 0 so the caller returns wreq->error if no data was written, or the number of bytes already written otherwise. Found with Clang's -Wconditional-uninitialized.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
72d08d2839649d1c5efbe375751f4473fa4486af to < 3d038eebdbd400c3bc4b66bd8aa0dff0c2bcce26affecteda0b4c7a49137ed21279f354eb59f49ddae8dffc2 to < 2e38d500471d097cda87d7d374bbc1b13493075daffecteda0b4c7a49137ed21279f354eb59f49ddae8dffc2 to < f18e8774f4d3137fa0a5fb8ffa83d59a719666d8affected0c29f6d63122a0168d67cb8ecde5b4cf7fe4acb0affected6.18.17 to < 6.18.53affected6.19.7 to < 6.20affected
Linux Linux
Default version status: affected
7.0affected0 to < 7.0unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected