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module: Don't fail module loading when setting ro_after_init section RO failed 

[ Upstream commit 110b1e070f ]

Once module init has succeded it is too late to cancel loading.
If setting ro_after_init data section to read-only fails, all we
can do is to inform the user through a warning.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Closes: https://lore.kernel.org/all/20230915082126.4187913-1-ruanjinjie@huawei.com/
Fixes: d1909c0221 ("module: Don't ignore errors from set_memory_XX()")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/d6c81f38da76092de8aacc8c93c4c65cb0fe48b8.1733427536.git.christophe.leroy@csgroup.eu
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe Leroy 2024-12-05 20:46:16 +01:00 committed by Greg Kroah-Hartman
parent 565611d101
commit fd41b2e9aa
1 changed files with 4 additions and 3 deletions
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7
kernel/module/main.c
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@ -2583,7 +2583,10 @@ static noinline int do_init_module(struct module *mod)
#endif
ret = module_enable_rodata_ro(mod, true);
if (ret)
goto fail_mutex_unlock;
pr_warn("%s: module_enable_rodata_ro_after_init() returned %d, "
"ro_after_init data might still be writable\n",
mod->name, ret);
mod_tree_remove_init(mod);
module_arch_freeing_init(mod);
for_class_mod_mem_type(type, init) {
@ -2622,8 +2625,6 @@ static noinline int do_init_module(struct module *mod)
return 0;
fail_mutex_unlock:
mutex_unlock(&module_mutex);
fail_free_freeinit:
kfree(freeinit);
fail: