Hi, I'm getting a crash when trying to load a module into a kernel that uses __ro_after_init static labels, see the crash below. The label is defined and initialized in the main kernel binary, and is used in the module. Is this not supported?
Thanks! ==== [ 15.088489] Unable to handle kernel write to read-only memory at virtual address ffffc4faeaa81ac8 Mem abort info: ESR = 0x9600004f EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x0000004f CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000004174b000 [ffffc4faeaa81ac8] pgd=00000000bdfff003, p4d=00000000bdfff003, pud=00000000bdffe003, pmd=00000000bdffb003, pte=0060000041681f83 Internal error: Oops: 9600004f [#1] PREEMPT SMP Modules linked in: test_kasan_module(+) CPU: 1 PID: 207 Comm: insmod Not tainted 5.10.0-rc4 #11 Hardware name: linux,dummy-virt (DT) pstate: 40400005 (nZcv daif +PAN -UAO -TCO BTYPE=--) pc : static_key_set_linked kernel/jump_label.c:368 pc : jump_label_add_module+0x1ec/0x2dc kernel/jump_label.c:658 lr : jump_label_add_module+0x1a8/0x2dc kernel/jump_label.c:653 sp : ffff800010283ba0 x29: ffff800010283ba0 x28: f8ff0000034baac0 x27: ffffc4faeaa81000 x26: ffffc4fa92d45008 x25: fdff000002c01e00 x24: f9ff000003788c80 x23: f8ff000003788e80 x22: ffffc4faeaa81ac0 x21: ffffc4fa92d45000 x20: ffffc4fa92d45020 x19: ffffc4fa92d46000 x18: dead000000000100 x17: 000000000000003f x16: ffffc4fa92d4c000 x15: 0000000000000000 x14: 0000000000000008 x13: fefefefefefefeff x12: 0000000057d3caa9 x11: 0000000000002000 x10: ff80c4fae9791a1c x9 : ffffc4fa92d43000 x8 : f9ff000003788c82 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : 0000000000000dc0 x2 : 00000000000000fe x1 : 0000000000000000 x0 : 0000000000000000 Call trace: static_key_set_linked kernel/jump_label.c:368 jump_label_add_module+0x1ec/0x2dc kernel/jump_label.c:658 jump_label_module_notify+0x40/0xa4 kernel/jump_label.c:736 notifier_call_chain kernel/notifier.c:83 notifier_call_chain_robust kernel/notifier.c:118 blocking_notifier_call_chain_robust+0x5c/0xe8 kernel/notifier.c:302 prepare_coming_module kernel/module.c:3854 load_module+0x2170/0x2cb4 kernel/module.c:4005 __do_sys_finit_module kernel/module.c:4128 __se_sys_finit_module kernel/module.c:4105 __arm64_sys_finit_module+0xb8/0xf4 kernel/module.c:4105 __invoke_syscall arch/arm64/kernel/syscall.c:36 invoke_syscall arch/arm64/kernel/syscall.c:48 el0_svc_common+0xa0/0x178 arch/arm64/kernel/syscall.c:159 do_el0_svc+0x24/0x80 arch/arm64/kernel/syscall.c:205 el0_svc arch/arm64/kernel/entry-common.c:236 el0_sync_handler+0x1f0/0x2ac arch/arm64/kernel/entry-common.c:254 el0_sync+0x190/0x1c0 arch/arm64/kernel/entry.S:740 Code: f94006c8 92400108 aa180108 b27f0108 (f90006c8) ---[ end trace 6f43f632dca3b2e8 ]---
