From 244b2c5ca8b14627e4a17755e5922221e121c771 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:15:07 +0000
Subject: [PATCH] change system file

---
 kernel/ipc/shm.c |   66 ++++++++++++++++++++++----------
 1 files changed, 45 insertions(+), 21 deletions(-)

diff --git a/kernel/ipc/shm.c b/kernel/ipc/shm.c
index ba99f48..b418731 100644
--- a/kernel/ipc/shm.c
+++ b/kernel/ipc/shm.c
@@ -711,7 +711,7 @@
 			ns->shm_tot + numpages > ns->shm_ctlall)
 		return -ENOSPC;
 
-	shp = kvmalloc(sizeof(*shp), GFP_KERNEL);
+	shp = kvmalloc(sizeof(*shp), GFP_KERNEL_ACCOUNT);
 	if (unlikely(!shp))
 		return -ENOMEM;
 
@@ -807,8 +807,7 @@
 /*
  * Called with shm_ids.rwsem and ipcp locked.
  */
-static inline int shm_more_checks(struct kern_ipc_perm *ipcp,
-				struct ipc_params *params)
+static int shm_more_checks(struct kern_ipc_perm *ipcp, struct ipc_params *params)
 {
 	struct shmid_kernel *shp;
 
@@ -1233,16 +1232,15 @@
 	return err;
 }
 
-long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
+static long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf, int version)
 {
-	int err, version;
+	int err;
 	struct ipc_namespace *ns;
 	struct shmid64_ds sem64;
 
 	if (cmd < 0 || shmid < 0)
 		return -EINVAL;
 
-	version = ipc_parse_version(&cmd);
 	ns = current->nsproxy->ipc_ns;
 
 	switch (cmd) {
@@ -1277,7 +1275,7 @@
 	case IPC_SET:
 		if (copy_shmid_from_user(&sem64, buf, version))
 			return -EFAULT;
-		/* fallthru */
+		fallthrough;
 	case IPC_RMID:
 		return shmctl_down(ns, shmid, cmd, &sem64);
 	case SHM_LOCK:
@@ -1290,17 +1288,31 @@
 
 SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
 {
-	return ksys_shmctl(shmid, cmd, buf);
+	return ksys_shmctl(shmid, cmd, buf, IPC_64);
 }
+
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
+long ksys_old_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
+{
+	int version = ipc_parse_version(&cmd);
+
+	return ksys_shmctl(shmid, cmd, buf, version);
+}
+
+SYSCALL_DEFINE3(old_shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
+{
+	return ksys_old_shmctl(shmid, cmd, buf);
+}
+#endif
 
 #ifdef CONFIG_COMPAT
 
 struct compat_shmid_ds {
 	struct compat_ipc_perm shm_perm;
 	int shm_segsz;
-	compat_time_t shm_atime;
-	compat_time_t shm_dtime;
-	compat_time_t shm_ctime;
+	old_time32_t shm_atime;
+	old_time32_t shm_dtime;
+	old_time32_t shm_ctime;
 	compat_ipc_pid_t shm_cpid;
 	compat_ipc_pid_t shm_lpid;
 	unsigned short shm_nattch;
@@ -1415,11 +1427,10 @@
 	}
 }
 
-long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr)
+static long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr, int version)
 {
 	struct ipc_namespace *ns;
 	struct shmid64_ds sem64;
-	int version = compat_ipc_parse_version(&cmd);
 	int err;
 
 	ns = current->nsproxy->ipc_ns;
@@ -1459,13 +1470,12 @@
 	case IPC_SET:
 		if (copy_compat_shmid_from_user(&sem64, uptr, version))
 			return -EFAULT;
-		/* fallthru */
+		fallthrough;
 	case IPC_RMID:
 		return shmctl_down(ns, shmid, cmd, &sem64);
 	case SHM_LOCK:
 	case SHM_UNLOCK:
 		return shmctl_do_lock(ns, shmid, cmd);
-		break;
 	default:
 		return -EINVAL;
 	}
@@ -1474,8 +1484,22 @@
 
 COMPAT_SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, void __user *, uptr)
 {
-	return compat_ksys_shmctl(shmid, cmd, uptr);
+	return compat_ksys_shmctl(shmid, cmd, uptr, IPC_64);
 }
+
+#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+long compat_ksys_old_shmctl(int shmid, int cmd, void __user *uptr)
+{
+	int version = compat_ipc_parse_version(&cmd);
+
+	return compat_ksys_shmctl(shmid, cmd, uptr, version);
+}
+
+COMPAT_SYSCALL_DEFINE3(old_shmctl, int, shmid, int, cmd, void __user *, uptr)
+{
+	return compat_ksys_old_shmctl(shmid, cmd, uptr);
+}
+#endif
 #endif
 
 /*
@@ -1614,7 +1638,7 @@
 	if (err)
 		goto out_fput;
 
-	if (down_write_killable(&current->mm->mmap_sem)) {
+	if (mmap_write_lock_killable(current->mm)) {
 		err = -EINTR;
 		goto out_fput;
 	}
@@ -1628,13 +1652,13 @@
 			goto invalid;
 	}
 
-	addr = do_mmap_pgoff(file, addr, size, prot, flags, 0, &populate, NULL);
+	addr = do_mmap(file, addr, size, prot, flags, 0, &populate, NULL);
 	*raddr = addr;
 	err = 0;
 	if (IS_ERR_VALUE(addr))
 		err = (long)addr;
 invalid:
-	up_write(&current->mm->mmap_sem);
+	mmap_write_unlock(current->mm);
 	if (populate)
 		mm_populate(addr, populate);
 
@@ -1709,7 +1733,7 @@
 	if (addr & ~PAGE_MASK)
 		return retval;
 
-	if (down_write_killable(&mm->mmap_sem))
+	if (mmap_write_lock_killable(mm))
 		return -EINTR;
 
 	/*
@@ -1797,7 +1821,7 @@
 
 #endif
 
-	up_write(&mm->mmap_sem);
+	mmap_write_unlock(mm);
 	return retval;
 }
 

--
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