In fuse_bufvec_advance func, calling fuse_bufvec_current func may return NULL, so we should check whether buf is NULL before using it.
Signed-off-by: Haotian Li <lihaoti...@huawei.com> Signed-off-by: Zhiqiang Liu <liuzhiqian...@huawei.com> --- tools/virtiofsd/buffer.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/virtiofsd/buffer.c b/tools/virtiofsd/buffer.c index 27c1377f22..bdc608c221 100644 --- a/tools/virtiofsd/buffer.c +++ b/tools/virtiofsd/buffer.c @@ -246,6 +246,10 @@ static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len) { const struct fuse_buf *buf = fuse_bufvec_current(bufv); + if (!buf) { + return 0; + } + bufv->off += len; assert(bufv->off <= buf->size); if (bufv->off == buf->size) { --