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4982e58669
Processes can write to the last page of a file using mmap, and when the file size is not a multiple of the page size, this can be used to write beyond the end of the file. This is sometimes referred to as page poisoning, and it is not a problem in itself because the data beyond eof will be ignored. However, we currently fail to clear out any space beyond the end of the file that we skip over when the file size is increased, so that "poison" can end up getting exposed. Fix that. Fixes xfstest generic/363. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
71 lines
2.3 KiB
71 lines
2.3 KiB