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[Qemu-devel] [PULL v2 30/50] ivshmem: error on too many eventfd received
From: |
marcandre . lureau |
Subject: |
[Qemu-devel] [PULL v2 30/50] ivshmem: error on too many eventfd received |
Date: |
Mon, 12 Oct 2015 18:41:24 +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
- Re: [Qemu-devel] [PULL v2 00/50] Ivshmem patches, (continued)
[Qemu-devel] [PULL v2 01/50] tests: Add ivshmem qtest, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 15/50] ivshmem: remove useless ivshmem_update_irq() val argument, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 07/50] ivshmem: remove unnecessary dup(), marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 24/50] ivshmem: migrate with VMStateDescription, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 25/50] ivshmem: shmfd can be 0, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 19/50] ivshmem: improve error handling, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 27/50] ivshmem: add device description, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 30/50] ivshmem: error on too many eventfd received,
marcandre . lureau <=
[Qemu-devel] [PULL v2 35/50] ivshmem-server: fix hugetlbfs support, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 36/50] docs: update ivshmem device spec, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 46/50] ivshmem: remove EventfdEntry.vector, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 45/50] ivshmem: add hostmem backend, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 43/50] ivshmem: do not keep shm_fd open, marcandre . lureau, 2015/10/15
[Qemu-devel] [PULL v2 28/50] ivshmem: fix pci_ivshmem_exit(), marcandre . lureau, 2015/10/15