[PATCH v2 4/7] arm64/modules: Add rlimit checking for arm64 modules

Rick Edgecombe
2018-10-11T23:40:09Z

This adds in the rlimit checking for the arm64 module allocator.

This has not been tested.

Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
---
arch/arm64/kernel/module.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
index f0f27aeefb73..ea9794f2f571 100644
--- a/arch/arm64/kernel/module.c
+++ b/arch/arm64/kernel/module.c
@@ -39,6 +39,9 @@ void *module_alloc(unsigned long size)
if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS))
gfp_mask |= __GFP_NOWARN;

+ if (check_inc_mod_rlimit(size))
+ return NULL;
+
p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
module_alloc_base + MODULES_VSIZE,
gfp_mask, PAGE_KERNEL_EXEC, 0,
@@ -65,6 +68,8 @@ void *module_alloc(unsigned long size)
return NULL;
}

+ update_mod_rlimit(p, size);
+
return p;
}

--
2.17.1