3.16.52-rc1 review patch. If anyone has any objections, please let me know.
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From: Andreas Gruenbacher agruenba@redhat.com
commit fc46820b27a2d9a46f7e90c9ceb4a64a1bc5fab8 upstream.
In generic_file_llseek_size, return -ENXIO for negative offsets as well as offsets beyond EOF. This affects filesystems which don't implement SEEK_HOLE / SEEK_DATA internally, possibly because they don't support holes.
Fixes xfstest generic/448.
Signed-off-by: Andreas Gruenbacher agruenba@redhat.com Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Ben Hutchings ben@decadent.org.uk --- fs/read_write.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/read_write.c +++ b/fs/read_write.c @@ -116,7 +116,7 @@ generic_file_llseek_size(struct file *fi * In the generic case the entire file is data, so as long as * offset isn't at the end of the file then the offset is data. */ - if (offset >= eof) + if ((unsigned long long)offset >= eof) return -ENXIO; break; case SEEK_HOLE: @@ -124,7 +124,7 @@ generic_file_llseek_size(struct file *fi * There is a virtual hole at the end of the file, so as long as * offset isn't i_size or larger, return i_size. */ - if (offset >= eof) + if ((unsigned long long)offset >= eof) return -ENXIO; offset = eof; break;