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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

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Pull security subsystem update from James Morris:
 "Just some minor updates across the subsystem"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  ima: eliminate passing d_name.name to process_measurement()
  TPM: Retry SaveState command in suspend path
  tpm/tpm_i2c_infineon: Add small comment about return value of __i2c_transfer
  tpm/tpm_i2c_infineon.c: Add OF attributes type and name to the of_device_id table entries
  tpm_i2c_stm_st33: Remove duplicate inclusion of header files
  tpm: Add support for new Infineon I2C TPM (SLB 9645 TT 1.2 I2C)
  char/tpm: Convert struct i2c_msg initialization to C99 format
  drivers/char/tpm/tpm_ppi: use strlcpy instead of strncpy
  tpm/tpm_i2c_stm_st33: formatting and white space changes
  Smack: include magic.h in smackfs.c
  selinux: make security_sb_clone_mnt_opts return an error on context mismatch
  seccomp: allow BPF_XOR based ALU instructions.
  Fix NULL pointer dereference in smack_inode_unlink() and smack_inode_rmdir()
  Smack: add support for modification of existing rules
  smack: SMACK_MAGIC to include/uapi/linux/magic.h
  Smack: add missing support for transmute bit in smack_str_from_perm()
  Smack: prevent revoke-subject from failing when unseen label is written to it
  tomoyo: use DEFINE_SRCU() to define tomoyo_ss
  tomoyo: use DEFINE_SRCU() to define tomoyo_ss
This commit is contained in:
Linus Torvalds 2013-04-30 16:27:51 -07:00
commit 2e1deaad1e
20 changed files with 450 additions and 201 deletions
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39
security/selinux/hooks.c
View file

@ -751,7 +751,37 @@ out_double_mount:
goto out;
}
static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
static int selinux_cmp_sb_context(const struct super_block *oldsb,
const struct super_block *newsb)
{
struct superblock_security_struct *old = oldsb->s_security;
struct superblock_security_struct *new = newsb->s_security;
char oldflags = old->flags & SE_MNTMASK;
char newflags = new->flags & SE_MNTMASK;
if (oldflags != newflags)
goto mismatch;
if ((oldflags & FSCONTEXT_MNT) && old->sid != new->sid)
goto mismatch;
if ((oldflags & CONTEXT_MNT) && old->mntpoint_sid != new->mntpoint_sid)
goto mismatch;
if ((oldflags & DEFCONTEXT_MNT) && old->def_sid != new->def_sid)
goto mismatch;
if (oldflags & ROOTCONTEXT_MNT) {
struct inode_security_struct *oldroot = oldsb->s_root->d_inode->i_security;
struct inode_security_struct *newroot = newsb->s_root->d_inode->i_security;
if (oldroot->sid != newroot->sid)
goto mismatch;
}
return 0;
mismatch:
printk(KERN_WARNING "SELinux: mount invalid. Same superblock, "
"different security settings for (dev %s, "
"type %s)\n", newsb->s_id, newsb->s_type->name);
return -EBUSY;
}
static int selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
{
const struct superblock_security_struct *oldsbsec = oldsb->s_security;
@ -766,14 +796,14 @@ static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
* mount options. thus we can safely deal with this superblock later
*/
if (!ss_initialized)
return;
return 0;
/* how can we clone if the old one wasn't set up?? */
BUG_ON(!(oldsbsec->flags & SE_SBINITIALIZED));
/* if fs is reusing a sb, just let its options stand... */
/* if fs is reusing a sb, make sure that the contexts match */
if (newsbsec->flags & SE_SBINITIALIZED)
return;
return selinux_cmp_sb_context(oldsb, newsb);
mutex_lock(&newsbsec->lock);
@ -806,6 +836,7 @@ static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
sb_finish_set_opts(newsb);
mutex_unlock(&newsbsec->lock);
return 0;
}
static int selinux_parse_opts_str(char *options,