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qemu/contrib

History

Marc-André Lureau 640601c7cb libvhost-user: fix crash when rings aren't ready Calling libvhost-user functions like vu_queue_get_avail_bytes() when the queue doesn't yet have addresses will result in the crashes like the following: Program received signal SIGSEGV, Segmentation fault. 0x000055c414112ce4 in vring_avail_idx (vq=0x55c41582fd68, vq=0x55c41582fd68) at /home/dgilbert/git/qemu/contrib/libvhost-user/libvhost-user.c:940 940 vq->shadow_avail_idx = vq->vring.avail->idx; (gdb) p vq $1 = (VuVirtq *) 0x55c41582fd68 (gdb) p vq->vring $2 = {num = 0, desc = 0x0, avail = 0x0, used = 0x0, log_guest_addr = 0, flags = 0} at /home/dgilbert/git/qemu/contrib/libvhost-user/libvhost-user.c:940 No locals. at /home/dgilbert/git/qemu/contrib/libvhost-user/libvhost-user.c:960 num_heads = <optimized out> out_bytes=out_bytes@entry=0x7fffd035d7c4, max_in_bytes=max_in_bytes@entry=0, max_out_bytes=max_out_bytes@entry=0) at /home/dgilbert/git/qemu/contrib/libvhost-user/libvhost-user.c:1034 Add a pre-condition checks on vring.avail before accessing it. Fix documentation and return type of vu_queue_empty() while at it. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>		9 years ago
..
ivshmem-client	Clean up ill-advised or unusual header guards	10 years ago
ivshmem-server	Clean up ill-advised or unusual header guards	10 years ago
libvhost-user	libvhost-user: fix crash when rings aren't ready	9 years ago