From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: Haotian Li <lihaotian9@huawei.com>
Cc: virtio-fs@redhat.com, linfeilong@huawei.com, qemu-devel@nongnu.org
Subject: Re: [Virtio-fs] [PATCH 1/3] tools/virtiofsd/buffer.c: check whether buf is NULL in fuse_bufvec_advance func
Date: Wed, 11 Nov 2020 19:59:01 +0000 [thread overview]
Message-ID: <20201111195901.GQ3232@work-vm> (raw)
In-Reply-To: <29fc87c2-b87c-4c34-40d4-75381f228849@huawei.com>
* Haotian Li (lihaotian9@huawei.com) wrote:
> 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 <lihaotian9@huawei.com>
> Signed-off-by: Zhiqiang Liu <liuzhiqiang26@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;
> + }
> +
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> bufv->off += len;
> assert(bufv->off <= buf->size);
> if (bufv->off == buf->size) {
> --
>
> _______________________________________________
> Virtio-fs mailing list
> Virtio-fs@redhat.com
> https://www.redhat.com/mailman/listinfo/virtio-fs
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2020-11-11 20:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-11 1:04 [PATCH v3 0/3] virtiofsd: fix some accessing NULL pointer problem Haotian Li
2020-11-11 1:05 ` [PATCH 1/3] tools/virtiofsd/buffer.c: check whether buf is NULL in fuse_bufvec_advance func Haotian Li
2020-11-11 19:59 ` Dr. David Alan Gilbert [this message]
2020-11-11 1:09 ` [PATCH 2/3] virtiofsd: check whether lo_map_reserve returns NULL in, main func Haotian Li
2020-11-11 19:52 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-11-11 1:10 ` [PATCH 3/3] virtiofsd: check whether strdup lo.source return NULL in " Haotian Li
2020-11-11 19:55 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-11-12 16:25 ` [PATCH v3 0/3] virtiofsd: fix some accessing NULL pointer problem Dr. David Alan Gilbert
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