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lua-lsm: expose kernel file load ids #17

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chenzongyao200127 wants to merge 2 commits into from
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lua-lsm: expose kernel file load ids #17

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a433970
lua-lsm: expose kernel file load ids to Lua hooks
chenzongyao200127 May 14, 2026
8cb3ac9
lua-lsm: drop redundant size args for file data hooks
chenzongyao200127 May 14, 2026
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19 changes: 9 additions & 10 deletions security/lua/lsm_defs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
#include <linux/prctl.h>
#include <linux/syscalls.h> /* for __MAP */
#include <linux/timekeeping.h> /* for ktime_get */
#include <linux/kernel_read_file.h>
#include <net/ipv6.h>
#include <linux/lsm_hooks.h>
#include <uapi/linux/lsm.h>
Expand Down Expand Up @@ -1804,52 +1805,50 @@ LUA_LSM_INT_DEFINE1(kernel_module_request, char *, kmod_name)
}

/**
* TODO: kernel_load_data
* kernel_load_data
* Default: 0
*/
LUA_LSM_INT_DEFINE2(kernel_load_data, enum kernel_load_data_id, id,
bool, contents)
{
lua_pushnil(L); /* TODO: id */
lua_pushstring(L, kernel_load_data_id_str(id));
lua_pushboolean(L, (int)contents);
}

/**
* TODO: kernel_post_load_data
* kernel_post_load_data
* Default: 0
*/
LUA_LSM_INT_DEFINE4(kernel_post_load_data, char *, buf, loff_t, size,
enum kernel_load_data_id, id, char *, description)
{
lua_pushlstring(L, (const char *)buf, (size_t)size);
lua_pushinteger(L, (lua_Integer)size);
lua_pushnil(L); /* TODO: id */
lua_pushstring(L, kernel_load_data_id_str(id));
lua_pushstring(L, (const char *)description);
}

/**
* TODO: kernel_read_file
* kernel_read_file
* Default: 0
*/
LUA_LSM_INT_DEFINE3(kernel_read_file, struct file *, file,
enum kernel_read_file_id, id, bool, contents)
{
*newfile(L) = file;
lua_pushnil(L); /* TODO: id */
lua_pushstring(L, kernel_read_file_id_str(id));
lua_pushboolean(L, (int)contents);
}

/**
* TODO: kernel_post_read_file
* kernel_post_read_file
* Default: 0
*/
LUA_LSM_INT_DEFINE4(kernel_post_read_file, struct file *, file,
char *, buf, loff_t, size, enum kernel_read_file_id, id)
{
*newfile(L) = file;
lua_pushlstring(L, (const char *)buf, (size_t)size);
lua_pushinteger(L, (lua_Integer)size);
lua_pushnil(L); /* TODO: id */
lua_pushstring(L, kernel_read_file_id_str(id));
}

static void build_lsm_setid_flags(lua_State *L, int flags)
Expand Down