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linux/drivers/hv
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Stanislav Kinsburskii c0e296f257 mshv: Fix error handling in mshv_region_pin 
The current error handling has two issues:

First, pin_user_pages_fast() can return a short pin count (less than
requested but greater than zero) when it cannot pin all requested pages.
This is treated as success, leading to partially pinned regions being
used, which causes memory corruption.

Second, when an error occurs mid-loop, already pinned pages from the
current batch are not properly accounted for before calling
mshv_region_invalidate_pages(), causing a page reference leak.

Treat short pins as errors and fix partial batch accounting before
cleanup.

Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
 		2026-03-18 16:18:49 +00:00
..
Kconfig mshv: Add support for movable memory regions 2025-12-05 23:20:49 +00:00
Makefile mshv: Add debugfs to view hypervisor statistics 2026-02-04 06:17:05 +00:00
channel.c Drivers: hv: fix missing kernel-doc description for 'size' in request_arr_init() 2025-11-15 06:18:16 +00:00
channel_mgmt.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
connection.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
hv.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
hv_balloon.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
hv_common.c mshv: Handle insufficient root memory hypervisor statuses 2026-02-19 06:42:11 +00:00
hv_debugfs.c hv_debugfs: Make hv_debug_root static 2020-04-04 17:47:43 +01:00
hv_kvp.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hv_proc.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hv_snapshot.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hv_trace.c hv: add SPDX license to trace 2018-03-28 13:24:56 +02:00
hv_trace.h Drivers: hv: vmbus: Drivers: hv: vmbus: Introduce CHANNELMSG_MODIFYCHANNEL_RESPONSE 2021-04-18 13:03:11 +00:00
hv_trace_balloon.h hv_balloon: trace post_status 2018-03-06 09:57:17 -08:00
hv_util.c Drivers: hv: use kmalloc_array() instead of kmalloc() 2025-12-05 23:16:49 +00:00
hv_utils_transport.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
hv_utils_transport.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 280 2019-06-05 17:36:36 +02:00
hyperv_vmbus.h mshv: Use try_cmpxchg() instead of cmpxchg() 2026-02-18 23:27:20 +00:00
mshv.h mshv: Use common "entry virt" APIs to do work in root before running guest 2025-09-30 22:50:48 +00:00
mshv_common.c mshv: hide x86-specific functions on arm64 2025-12-17 18:04:15 +00:00
mshv_debugfs.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mshv_debugfs_counters.c mshv: Add data for printing stats page counters 2026-02-04 06:17:05 +00:00
mshv_eventfd.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mshv_eventfd.h mshv: clear eventfd counter on irqfd shutdown 2026-02-04 06:36:19 +00:00
mshv_irq.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
mshv_portid_table.c Drivers: hv: Introduce mshv_root module to expose /dev/mshv to VMMs 2025-03-21 18:24:22 +00:00
mshv_regions.c mshv: Fix error handling in mshv_region_pin 2026-03-18 16:18:49 +00:00
mshv_root.h mshv: refactor synic init and cleanup 2026-02-25 19:09:24 +00:00
mshv_root_hv_call.c mshv: Introduce hv_deposit_memory helper functions 2026-02-19 06:38:48 +00:00
mshv_root_main.c mshv: Fix use-after-free in mshv_map_user_memory error path 2026-03-13 21:11:18 +00:00
mshv_synic.c mshv: add arm64 support for doorbell & intercept SINTs 2026-02-25 19:09:49 +00:00
mshv_vtl.h Drivers: hv: Introduce mshv_vtl driver 2025-12-05 23:16:26 +00:00
mshv_vtl_main.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ring_buffer.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
vmbus_drv.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00