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kernel: Rollback disable_seccomp

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Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
Co-authored-by: Faris <rissu.ntk@gmail.com>
This commit is contained in:
ShirkNeko
2025-11-09 17:00:43 +08:00
parent 1f04f13e44
commit 2433ced81a
3 changed files with 41 additions and 25 deletions
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30
kernel/app_profile.c
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@@ -62,21 +62,33 @@ static void setup_groups(struct root_profile *profile, struct cred *cred)
put_group_info(group_info);
}
void disable_seccomp(void)
void disable_seccomp(struct task_struct *tsk)
{
assert_spin_locked(&current->sighand->siglock);
// disable seccomp
assert_spin_locked(&tsk->sighand->siglock);
// disable seccomp
#if defined(CONFIG_GENERIC_ENTRY) && \
LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0)
clear_syscall_work(SECCOMP);
LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0)
clear_syscall_work(SECCOMP);
#else
clear_thread_flag(TIF_SECCOMP);
clear_thread_flag(TIF_SECCOMP);
#endif
#ifdef CONFIG_SECCOMP
current->seccomp.mode = 0;
current->seccomp.filter = NULL;
tsk->seccomp.mode = 0;
if (tsk->seccomp.filter) {
// 5.9+ have filter_count and use seccomp_filter_release
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 9, 0)
seccomp_filter_release(tsk);
atomic_set(&tsk->seccomp.filter_count, 0);
#else
// for 6.11+ kernel support?
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 9, 0)
put_seccomp_filter(tsk);
#endif
tsk->seccomp.filter = NULL;
#endif
}
#endif
}
@@ -136,7 +148,7 @@ void escape_with_root_profile(void)
// Refer to kernel/seccomp.c: seccomp_set_mode_strict
// When disabling Seccomp, ensure that current->sighand->siglock is held during the operation.
spin_lock_irq(&current->sighand->siglock);
disable_seccomp();
disable_seccomp(current);
spin_unlock_irq(&current->sighand->siglock);
setup_selinux(profile->selinux_domain);