A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

shm/security: Pass kern_ipc_perm not shmid_kernel into the shm security hooks

Browse source 
All of the implementations of security hooks that take shmid_kernel only
access shm_perm the struct kern_ipc_perm member.  This means the
dependencies of the shm security hooks can be simplified by passing
the kern_ipc_perm member of shmid_kernel..

Making this change will allow struct shmid_kernel to become private to ipc/shm.c.

Signed-off-by: "Eric W. Biederman" <[email protected]>
This commit is contained in:
Eric W. Biederman 2018-03-22 21:08:27 -05:00
commit 7191adff2a
6 changed files with 52 additions and 56 deletions
Download patch file Download diff file Expand all files Collapse all files

17
ipc/shm.c
View file

@ -181,7 +181,7 @@ static void shm_rcu_free(struct rcu_head *head)
rcu);
struct shmid_kernel *shp = container_of(ptr, struct shmid_kernel,
shm_perm);
security_shm_free(shp);
security_shm_free(&shp->shm_perm);
kvfree(shp);
}
@ -554,7 +554,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
shp->mlock_user = NULL;
shp->shm_perm.security = NULL;
error = security_shm_alloc(shp);
error = security_shm_alloc(&shp->shm_perm);
if (error) {
kvfree(shp);
return error;
@ -635,10 +635,7 @@ no_file:
*/
static inline int shm_security(struct kern_ipc_perm *ipcp, int shmflg)
{
struct shmid_kernel *shp;
shp = container_of(ipcp, struct shmid_kernel, shm_perm);
return security_shm_associate(shp, shmflg);
return security_shm_associate(ipcp, shmflg);
}
/*
@ -835,7 +832,7 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
shp = container_of(ipcp, struct shmid_kernel, shm_perm);
err = security_shm_shmctl(shp, cmd);
err = security_shm_shmctl(&shp->shm_perm, cmd);
if (err)
goto out_unlock1;
@ -934,7 +931,7 @@ static int shmctl_stat(struct ipc_namespace *ns, int shmid,
if (ipcperms(ns, &shp->shm_perm, S_IRUGO))
goto out_unlock;
err = security_shm_shmctl(shp, cmd);
err = security_shm_shmctl(&shp->shm_perm, cmd);
if (err)
goto out_unlock;
@ -978,7 +975,7 @@ static int shmctl_do_lock(struct ipc_namespace *ns, int shmid, int cmd)
}
audit_ipc_obj(&(shp->shm_perm));
err = security_shm_shmctl(shp, cmd);
err = security_shm_shmctl(&shp->shm_perm, cmd);
if (err)
goto out_unlock1;
@ -1348,7 +1345,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
if (ipcperms(ns, &shp->shm_perm, acc_mode))
goto out_unlock;
err = security_shm_shmat(shp, shmaddr, shmflg);
err = security_shm_shmat(&shp->shm_perm, shmaddr, shmflg);
if (err)
goto out_unlock;