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43 lines
1.7 KiB
43 lines
1.7 KiB
6 years ago
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From ef55290ab88bb9a640bb0ab7213b6827c7207ee6 Mon Sep 17 00:00:00 2001
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From: Sugizaki Yukimasa <i.can.speak.c.and.basic@gmail.com>
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Date: Fri, 5 Jan 2018 00:01:30 +0900
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Subject: [PATCH 149/454] vcsm: Support for finding user/vc handle in memory
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pool
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vmcs_sm_{usr,vc}_handle_from_pid_and_address() were failing to find
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handle if specified user pointer is not exactly the one that the memory
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locking call returned even if the pointer is in range of map/resource.
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So fixed the functions to match the range.
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Signed-off-by: Sugizaki Yukimasa <i.can.speak.c.and.basic@gmail.com>
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---
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drivers/char/broadcom/vc_sm/vmcs_sm.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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--- a/drivers/char/broadcom/vc_sm/vmcs_sm.c
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+++ b/drivers/char/broadcom/vc_sm/vmcs_sm.c
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@@ -276,7 +276,10 @@ static unsigned int vmcs_sm_vc_handle_fr
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/* Lookup the resource. */
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if (!list_empty(&sm_state->map_list)) {
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list_for_each_entry(map, &sm_state->map_list, map_list) {
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- if (map->res_pid != pid || map->res_addr != addr)
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+ if (map->res_pid != pid)
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+ continue;
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+ if (!(map->res_addr <= addr &&
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+ addr < map->res_addr + map->resource->res_size))
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continue;
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pr_debug("[%s]: global map %p (pid %u, addr %lx) -> vc-hdl %x (usr-hdl %x)\n",
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@@ -326,7 +329,10 @@ static unsigned int vmcs_sm_usr_handle_f
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/* Lookup the resource. */
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if (!list_empty(&sm_state->map_list)) {
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list_for_each_entry(map, &sm_state->map_list, map_list) {
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- if (map->res_pid != pid || map->res_addr != addr)
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+ if (map->res_pid != pid)
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+ continue;
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+ if (!(map->res_addr <= addr &&
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+ addr < map->res_addr + map->resource->res_size))
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continue;
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pr_debug("[%s]: global map %p (pid %u, addr %lx) -> usr-hdl %x (vc-hdl %x)\n",
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