diff options
Diffstat (limited to 'arch/arm64/kernel/ptrace.c')
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 170f42fd6101..eb2f73939b7b 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -909,6 +909,38 @@ static int pac_mask_get(struct task_struct *target, return membuf_write(&to, &uregs, sizeof(uregs)); } +static int pac_enabled_keys_get(struct task_struct *target, + const struct user_regset *regset, + struct membuf to) +{ + long enabled_keys = ptrauth_get_enabled_keys(target); + + if (IS_ERR_VALUE(enabled_keys)) + return enabled_keys; + + return membuf_write(&to, &enabled_keys, sizeof(enabled_keys)); +} + +static int pac_enabled_keys_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + long enabled_keys = ptrauth_get_enabled_keys(target); + + if (IS_ERR_VALUE(enabled_keys)) + return enabled_keys; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &enabled_keys, 0, + sizeof(long)); + if (ret) + return ret; + + return ptrauth_set_enabled_keys(target, PR_PAC_ENABLED_KEYS_MASK, + enabled_keys); +} + #ifdef CONFIG_CHECKPOINT_RESTORE static __uint128_t pac_key_to_user(const struct ptrauth_key *key) { @@ -1074,6 +1106,7 @@ enum aarch64_regset { #endif #ifdef CONFIG_ARM64_PTR_AUTH REGSET_PAC_MASK, + REGSET_PAC_ENABLED_KEYS, #ifdef CONFIG_CHECKPOINT_RESTORE REGSET_PACA_KEYS, REGSET_PACG_KEYS, @@ -1160,6 +1193,14 @@ static const struct user_regset aarch64_regsets[] = { .regset_get = pac_mask_get, /* this cannot be set dynamically */ }, + [REGSET_PAC_ENABLED_KEYS] = { + .core_note_type = NT_ARM_PAC_ENABLED_KEYS, + .n = 1, + .size = sizeof(long), + .align = sizeof(long), + .regset_get = pac_enabled_keys_get, + .set = pac_enabled_keys_set, + }, #ifdef CONFIG_CHECKPOINT_RESTORE [REGSET_PACA_KEYS] = { .core_note_type = NT_ARM_PACA_KEYS, |