From 6c21a7fb492bf7e2c4985937082ce58ddeca84bd Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Thu, 22 Oct 2009 17:30:13 -0400 Subject: LSM: imbed ima calls in the security hooks Based on discussions on LKML and LSM, where there are consecutive security_ and ima_ calls in the vfs layer, move the ima_ calls to the existing security_ hooks. Signed-off-by: Mimi Zohar Signed-off-by: James Morris --- fs/exec.c | 4 ---- fs/file_table.c | 2 -- fs/inode.c | 10 ---------- mm/mmap.c | 4 ---- security/integrity/ima/Kconfig | 1 + security/security.c | 28 +++++++++++++++++++++++++--- 6 files changed, 26 insertions(+), 23 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index d49be6b..d164342 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -46,7 +46,6 @@ #include #include #include -#include #include #include #include @@ -1211,9 +1210,6 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs) retval = security_bprm_check(bprm); if (retval) return retval; - retval = ima_bprm_check(bprm); - if (retval) - return retval; /* kernel module loader fixup */ /* so we don't try to load run modprobe in kernel space. */ diff --git a/fs/file_table.c b/fs/file_table.c index 8eb4404..4bef4c0 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include #include @@ -280,7 +279,6 @@ void __fput(struct file *file) if (file->f_op && file->f_op->release) file->f_op->release(inode, file); security_file_free(file); - ima_file_free(file); if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL)) cdev_put(inode->i_cdev); fops_put(file->f_op); diff --git a/fs/inode.c b/fs/inode.c index 4d8e3be..06c1f02 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -18,7 +18,6 @@ #include #include #include -#include #include #include #include @@ -157,11 +156,6 @@ int inode_init_always(struct super_block *sb, struct inode *inode) if (security_inode_alloc(inode)) goto out; - - /* allocate and initialize an i_integrity */ - if (ima_inode_alloc(inode)) - goto out_free_security; - spin_lock_init(&inode->i_lock); lockdep_set_class(&inode->i_lock, &sb->s_type->i_lock_key); @@ -201,9 +195,6 @@ int inode_init_always(struct super_block *sb, struct inode *inode) #endif return 0; - -out_free_security: - security_inode_free(inode); out: return -ENOMEM; } @@ -235,7 +226,6 @@ static struct inode *alloc_inode(struct super_block *sb) void __destroy_inode(struct inode *inode) { BUG_ON(inode_has_buffers(inode)); - ima_inode_free(inode); security_inode_free(inode); fsnotify_inode_delete(inode); #ifdef CONFIG_FS_POSIX_ACL diff --git a/mm/mmap.c b/mm/mmap.c index 73f5e4b..292ddc3 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -1061,9 +1060,6 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, error = security_file_mmap(file, reqprot, prot, flags, addr, 0); if (error) return error; - error = ima_file_mmap(file, prot); - if (error) - return error; return mmap_region(file, addr, len, flags, vm_flags, pgoff); } diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig index 53d9764..3d7846d 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -3,6 +3,7 @@ config IMA bool "Integrity Measurement Architecture(IMA)" depends on ACPI + depends on SECURITY select SECURITYFS select CRYPTO select CRYPTO_HMAC diff --git a/security/security.c b/security/security.c index 2797573..684d5ee 100644 --- a/security/security.c +++ b/security/security.c @@ -16,6 +16,7 @@ #include #include #include +#include /* Boot-time LSM user choice */ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1]; @@ -235,7 +236,12 @@ int security_bprm_set_creds(struct linux_binprm *bprm) int security_bprm_check(struct linux_binprm *bprm) { - return security_ops->bprm_check_security(bprm); + int ret; + + ret = security_ops->bprm_check_security(bprm); + if (ret) + return ret; + return ima_bprm_check(bprm); } void security_bprm_committing_creds(struct linux_binprm *bprm) @@ -352,12 +358,21 @@ EXPORT_SYMBOL(security_sb_parse_opts_str); int security_inode_alloc(struct inode *inode) { + int ret; + inode->i_security = NULL; - return security_ops->inode_alloc_security(inode); + ret = security_ops->inode_alloc_security(inode); + if (ret) + return ret; + ret = ima_inode_alloc(inode); + if (ret) + security_inode_free(inode); + return ret; } void security_inode_free(struct inode *inode) { + ima_inode_free(inode); security_ops->inode_free_security(inode); } @@ -648,6 +663,8 @@ int security_file_alloc(struct file *file) void security_file_free(struct file *file) { security_ops->file_free_security(file); + if (file->f_dentry) + ima_file_free(file); } int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) @@ -659,7 +676,12 @@ int security_file_mmap(struct file *file, unsigned long reqprot, unsigned long prot, unsigned long flags, unsigned long addr, unsigned long addr_only) { - return security_ops->file_mmap(file, reqprot, prot, flags, addr, addr_only); + int ret; + + ret = security_ops->file_mmap(file, reqprot, prot, flags, addr, addr_only); + if (ret) + return ret; + return ima_file_mmap(file, prot); } int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, -- cgit v1.1