Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 15/24] vfs: Return -ENXIO for negative SEEK_HOLE / SEEK_DATA offsets | Date | Tue, 3 Oct 2017 14:18:36 +0200 |
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3.18-stable 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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;
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