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userspace: Additional checks in K_SYSCALL_MEMORY #65546

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Merged
merged 1 commit into from
Dec 11, 2023
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userspace: Additional checks in K_SYSCALL_MEMORY #65546

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5 changes: 3 additions & 2 deletions include/zephyr/internal/syscall_handler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -413,8 +413,9 @@ int k_usermode_string_copy(char *dst, const char *src, size_t maxlen);
* functionality in the Zephyr tree.
*/
#define K_SYSCALL_MEMORY(ptr, size, write) \
K_SYSCALL_VERIFY_MSG(arch_buffer_validate((void *)ptr, size, write) \
== 0, \
K_SYSCALL_VERIFY_MSG((size >= 0) && !Z_DETECT_POINTER_OVERFLOW(ptr, size) \
&& (arch_buffer_validate((void *)ptr, size, write) \
== 0), \
"Memory region %p (size %zu) %s access denied", \
(void *)(ptr), (size_t)(size), \
write ? "write" : "read")
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