Demi Marie Obenour 1e92426e2b xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE ... [ Upstream commit 166d386323 ] The error paths of gntdev_mmap() can call unmap_grant_pages() even though not all of the pages have been successfully mapped. This will trigger the WARN_ON()s in __unmap_grant_pages_done(). The number of warnings can be very large; I have observed thousands of lines of warnings in the systemd journal. Avoid this problem by only warning on unmapping failure if the handle being unmapped is not INVALID_GRANT_HANDLE. The handle field of any page that was not successfully mapped will be INVALID_GRANT_HANDLE, so this catches all cases where unmapping can legitimately fail. Fixes: dbe97cff7d ("xen/gntdev: Avoid blocking in unmap_grant_pages()") Cc: stable@vger.kernel.org Suggested-by: Juergen Gross <jgross@suse.com> Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com> Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20220710230522.1563-1-demi@invisiblethingslab.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-07-21 21:24:23 +02:00
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events	xen/console: harden hvc_xen against event channel storms	2021-12-22 09:32:52 +01:00
xen-pciback	…
xenbus	xen/xenbus: don't let xenbus_grant_ring() remove grants in error case	2022-03-11 12:22:36 +01:00
xenfs	…
Kconfig	…
Makefile	…
acpi.c	…
arm-device.c	…
balloon.c	…
biomerge.c	…
cpu_hotplug.c	…
dbgp.c	…
efi.c	…
evtchn.c	…
features.c	x86/xen: Remove undefined behavior in setup_features()	2022-06-29 09:03:24 +02:00
gntalloc.c	xen/gntalloc: don't use gnttab_query_foreign_access()	2022-03-11 12:22:36 +01:00
gntdev-common.h	xen/gntdev: Avoid blocking in unmap_grant_pages()	2022-06-29 09:03:19 +02:00
gntdev-dmabuf.c	…
gntdev-dmabuf.h	…
gntdev.c	xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE	2022-07-21 21:24:23 +02:00
grant-table.c	xen/gnttab: fix gnttab_end_foreign_access() without page specified	2022-03-11 12:22:37 +01:00
manage.c	…
mcelog.c	…
mem-reservation.c	…
pci.c	…
pcpu.c	…
platform-pci.c	…
privcmd-buf.c	…
privcmd.c	…
privcmd.h	…
pvcalls-back.c	…
pvcalls-front.c	xen/pvcalls: use alloc/free_pages_exact()	2022-03-11 12:22:36 +01:00
pvcalls-front.h	…
swiotlb-xen.c	swiotlb: Support aligned swiotlb buffers	2022-04-08 14:24:17 +02:00
sys-hypervisor.c	…
time.c	…
unpopulated-alloc.c	…
xen-acpi-pad.c	…
xen-acpi-processor.c	…
xen-balloon.c	…
xen-front-pgdir-shbuf.c	…
xen-scsiback.c	…
xlate_mmu.c	xen: unexport __init-annotated xen_xlate_map_ballooned_pages()	2022-06-14 18:36:17 +02:00