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[Qemu-devel] [PATCH v5 29/48] ivshmem: error on too many eventfd receive
From: |
marcandre . lureau |
Subject: |
[Qemu-devel] [PATCH v5 29/48] ivshmem: error on too many eventfd received |
Date: |
Fri, 2 Oct 2015 21:09:32 +0200 |
From: Marc-André Lureau <address@hidden>
The number of eventfd that can be handled per peer is limited by the
number of vectors. Return an error when receiving too many of them.
Signed-off-by: Marc-André Lureau <address@hidden>
Reviewed-by: Claudio Fontana <address@hidden>
---
hw/misc/ivshmem.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 0e31d1d..50af4c7 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -571,6 +571,14 @@ static void ivshmem_read(void *opaque, const uint8_t *buf,
int size)
/* each peer has an associated array of eventfds, and we keep
* track of how many eventfds received so far */
/* get a new eventfd: */
+ /* get a new eventfd */
+ if (peer->nb_eventfds >= s->vectors) {
+ error_report("Too many eventfd received, device has %d vectors",
+ s->vectors);
+ close(incoming_fd);
+ return;
+ }
+
new_eventfd = peer->nb_eventfds++;
/* this is an eventfd for a particular peer VM */
--
2.4.3
- [Qemu-devel] [PATCH v5 00/48] ivshmem improvements, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 02/48] msix: add VMSTATE_MSIX_TEST, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 22/48] ivshmem: use common is_power_of_2(), marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 11/48] ivshmem: limit maximum number of peers to G_MAXUINT16, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 23/48] ivshmem: migrate with VMStateDescription, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 17/48] ivshmem: improve debug messages, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 26/48] ivshmem: add device description, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 34/48] ivshmem-server: fix hugetlbfs support, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 24/48] ivshmem: shmfd can be 0, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 29/48] ivshmem: error on too many eventfd received,
marcandre . lureau <=
- [Qemu-devel] [PATCH v5 33/48] ivshmem-server: use a uint16 for client ID, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 31/48] contrib: add ivshmem client and server, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 36/48] ivshmem: add check on protocol version in QEMU, marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 39/48] qtest: add qtest_add_abrt_handler(), marcandre . lureau, 2015/10/08
- [Qemu-devel] [PATCH v5 40/48] glib-compat: add 2.38/2.40/2.46 asserts, marcandre . lureau, 2015/10/08