6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christophe Leroy christophe.leroy@csgroup.eu
[ Upstream commit 110b1e070f1d50f5217bd2c758db094998bb7b77 ]
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: d1909c022173 ("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/d6c81f38da76092de8aacc8c93c4c65cb0fe48b8.173342753... Signed-off-by: Petr Pavlu petr.pavlu@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/module/main.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/module/main.c b/kernel/module/main.c index 49b9bca9de12f..93a07387af3b7 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -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: