Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via clone range cifs_remap_file_range() discarded the pagecache only for the folios overlapping the destination region, so when a clone extends the file the folio straddling the old EOF - which may hold data dirtied past EOF through an mmap - was never dropped and became visible as file content once the file was extended. Start the discard at the smaller of fstart and the old EOF. i_size is still old here, so nothing past the old EOF is flushed to the server.
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
c54fc3a4f375663f2361a9cbb2955fb4ef912879 to < 15bb9f1d3e967e328649e92a1451e60a0dc66118affectedc54fc3a4f375663f2361a9cbb2955fb4ef912879 to < 4721587f96cb8de8164f3fd203093a0875560999affected358bd5f436d820bb758833050aae065b35d6986caffected43801359c8971cc49b4a4db5015fba77fbd09c32affected6.1.68 to < 6.2affected6.6.7 to < 6.7affected
Linux Linux
Default version status: affected
6.7affected0 to < 6.7unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected