> Author: sobomax > Date: Tue Nov 6 15:55:41 2018 > New Revision: 340187 > URL: https://svnweb.freebsd.org/changeset/base/340187 > > Log: > Don't allow BIO_READ, BIO_WRITE or BIO_DELETE requests that are > fully beyond the end of providers media. The only exception is made > for the zero length transfers which are allowed to be just on the > boundary. Previously, any requests starting on the boundary (i.e. next > byte after the last one) have been allowed to go through. > > No response from: freebsd-geom@, phk > MFC after: 1 month > > Modified: > head/sys/geom/geom_io.c > > Modified: head/sys/geom/geom_io.c > ============================================================================== > --- head/sys/geom/geom_io.c Tue Nov 6 15:52:49 2018 (r340186) > +++ head/sys/geom/geom_io.c Tue Nov 6 15:55:41 2018 (r340187) > @@ -420,6 +420,8 @@ g_io_check(struct bio *bp) > return (EIO); > if (bp->bio_offset > pp->mediasize) > return (EIO); > + if (bp->bio_offset == pp->mediasize && bp->bio_length > 0) > + return (EIO);
Isnt mediasize 0 based, such that any operation at pp->mediasize is technically past the end of the media and should get an EIO no matter how big it is? Who is doing 0 byte operations at pp->mediasize? That code should probably be fixed rather than allowing this special case here. > /* Truncate requests to the end of providers media. */ > excess = bp->bio_offset + bp->bio_length; > > -- Rod Grimes rgri...@freebsd.org _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
