I bisected again. It seems I made some mistake last time, as I got a different result this time. Maybe, because these problematic kernels may boot fine sometimes, like I said before.
Anyway, first bad commit (makes much more sense this time):
e7b813b32a42a3a6281a4fd9ae7700a0257c1d50
efi: random: refresh non-volatile random seed when RNG is initialized
I confirmed that this is the code causing the issue by commenting it out (see the patch file). Without this code, the latest mainline boots fine.
Terveisin
Sami Korkalainen
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index abeff7dc0b58..c362c807f5d6 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -360,7 +360,7 @@ static void __init efi_debugfs_init(void)
#else
static inline void efi_debugfs_init(void) {}
#endif
-
+/*
static void refresh_nv_rng_seed(struct work_struct *work)
{
u8 seed[EFI_RANDOM_SEED_SIZE];
@@ -378,7 +378,7 @@ static int refresh_nv_rng_seed_notification(struct notifier_block *nb, unsigned
return NOTIFY_DONE;
}
static struct notifier_block refresh_nv_rng_seed_nb = { .notifier_call = refresh_nv_rng_seed_notification };
-
+*/
/*
* We register the efi subsystem with the firmware subsystem and the
* efivars subsystem with the efi subsystem, if the system was booted with
@@ -450,10 +450,10 @@ static int __init efisubsys_init(void)
if (efi.coco_secret != EFI_INVALID_TABLE_ADDR)
platform_device_register_simple("efi_secret", 0, NULL, 0);
#endif
-
+/*
if (efi_rt_services_supported(EFI_RT_SUPPORTED_SET_VARIABLE))
execute_with_initialized_rng(&refresh_nv_rng_seed_nb);
-
+*/
return 0;
err_remove_group:
