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evm: Pass user namespace to set/remove xattr hooks

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In preparation for 'evm: Allow setxattr() and setattr() for unmodified
metadata', this patch passes mnt_userns to the inode set/remove xattr hooks
so that the GID of the inode on an idmapped mount is correctly determined
by posix_acl_update_mode().

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Roberto Sassu 2021-05-14 17:27:48 +02:00 • committed by Mimi Zohar
parent cdef685be5
commit 7e135dc725
3 changed files with 21 additions and 12 deletions
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12
include/linux/evm.h
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@ -23,13 +23,15 @@ extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
struct integrity_iint_cache *iint);
extern int evm_inode_setattr(struct dentry *dentry, struct iattr *attr);
extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
extern int evm_inode_setxattr(struct dentry *dentry, const char *name,
extern int evm_inode_setxattr(struct user_namespace *mnt_userns,
struct dentry *dentry, const char *name,
const void *value, size_t size);
extern void evm_inode_post_setxattr(struct dentry *dentry,
const char *xattr_name,
const void *xattr_value,
size_t xattr_value_len);
extern int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name);
extern int evm_inode_removexattr(struct user_namespace *mnt_userns,
struct dentry *dentry, const char *xattr_name);
extern void evm_inode_post_removexattr(struct dentry *dentry,
const char *xattr_name);
extern int evm_inode_init_security(struct inode *inode,
@ -72,7 +74,8 @@ static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
return;
}
static inline int evm_inode_setxattr(struct dentry *dentry, const char *name,
static inline int evm_inode_setxattr(struct user_namespace *mnt_userns,
struct dentry *dentry, const char *name,
const void *value, size_t size)
{
return 0;
@ -86,7 +89,8 @@ static inline void evm_inode_post_setxattr(struct dentry *dentry,
return;
}
static inline int evm_inode_removexattr(struct dentry *dentry,
static inline int evm_inode_removexattr(struct user_namespace *mnt_userns,
struct dentry *dentry,
const char *xattr_name)
{
return 0;