Author: jhb Date: Sat Nov 7 16:20:37 2020 New Revision: 367449 URL: https://svnweb.freebsd.org/changeset/base/367449
Log: MFC 366296: Avoid a dubious assignment to bio_data in aio_qbio(). A user pointer is not a suitable value for bio_data and the next block of code always overwrites bio_data anyway. Just use cb->aio_buf directly in the call to vm_fault_quick_hold_pages(). Modified: stable/12/sys/kern/vfs_aio.c Directory Properties: stable/12/ (props changed) Changes in other areas also in this revision: Modified: stable/11/sys/kern/vfs_aio.c Directory Properties: stable/11/ (props changed) Modified: stable/12/sys/kern/vfs_aio.c ============================================================================== --- stable/12/sys/kern/vfs_aio.c Sat Nov 7 15:38:01 2020 (r367448) +++ stable/12/sys/kern/vfs_aio.c Sat Nov 7 16:20:37 2020 (r367449) @@ -1278,7 +1278,6 @@ aio_qbio(struct proc *p, struct kaiocb *job) bp->bio_length = cb->aio_nbytes; bp->bio_bcount = cb->aio_nbytes; bp->bio_done = aio_biowakeup; - bp->bio_data = (void *)(uintptr_t)cb->aio_buf; bp->bio_offset = cb->aio_offset; bp->bio_cmd = cb->aio_lio_opcode == LIO_WRITE ? BIO_WRITE : BIO_READ; bp->bio_dev = dev; @@ -1288,7 +1287,7 @@ aio_qbio(struct proc *p, struct kaiocb *job) if (cb->aio_lio_opcode == LIO_READ) prot |= VM_PROT_WRITE; /* Less backwards than it looks */ job->npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map, - (vm_offset_t)bp->bio_data, bp->bio_length, prot, job->pages, + (vm_offset_t)cb->aio_buf, bp->bio_length, prot, job->pages, nitems(job->pages)); if (job->npages < 0) { error = EFAULT; _______________________________________________ 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"