Some filesystems may return 0s in statfs (trivially, a FUSE filesystem can do so). QEMU should handle this gracefully and just behave the same as if statfs failed.
Signed-off-by: Dan Schatzberg <dschatzb...@fb.com> --- hw/9pfs/9p.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 37abcdb71e..520177f40c 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -1834,8 +1834,10 @@ static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) * and as well as less than (client msize - P9_IOHDRSZ)) */ if (!v9fs_co_statfs(pdu, path, &stbuf)) { - iounit = stbuf.f_bsize; - iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; + if (stbuf.f_bsize) { + iounit = stbuf.f_bsize; + iounit *= (s->msize - P9_IOHDRSZ) / stbuf.f_bsize; + } } if (!iounit) { iounit = s->msize - P9_IOHDRSZ; -- 2.17.1