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SELinux: open perm for sock files

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When I did open permissions I didn't think any sockets would have an open.
Turns out AF_UNIX sockets can have an open when they are bound to the
filesystem namespace.  This patch adds a new SOCK_FILE__OPEN permission.
It's safe to add this as the open perms are already predicated on
capabilities and capabilities means we have unknown perm handling so
systems should be as backwards compatible as the policy wants them to
be.

https://bugzilla.redhat.com/show_bug.cgi?id=475224

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Eric Paris 2009-03-05 13:40:35 -05:00 committed by James Morris
parent 113a0e4590
commit 6a25b27d60
3 changed files with 4 additions and 0 deletions
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2
security/selinux/hooks.c
View file

@ -1838,6 +1838,8 @@ static inline u32 open_file_to_av(struct file *file)
av |= FIFO_FILE__OPEN;
else if (S_ISDIR(mode))
av |= DIR__OPEN;
else if (S_ISSOCK(mode))
av |= SOCK_FILE__OPEN;
else
printk(KERN_ERR "SELinux: WARNING: inside %s with "
"unknown mode:%o\n", __func__, mode);

1
security/selinux/include/av_perm_to_string.h
View file

@ -24,6 +24,7 @@
S_(SECCLASS_CHR_FILE, CHR_FILE__EXECMOD, "execmod")
S_(SECCLASS_CHR_FILE, CHR_FILE__OPEN, "open")
S_(SECCLASS_BLK_FILE, BLK_FILE__OPEN, "open")
S_(SECCLASS_SOCK_FILE, SOCK_FILE__OPEN, "open")
S_(SECCLASS_FIFO_FILE, FIFO_FILE__OPEN, "open")
S_(SECCLASS_FD, FD__USE, "use")
S_(SECCLASS_TCP_SOCKET, TCP_SOCKET__CONNECTTO, "connectto")

1
security/selinux/include/av_permissions.h
View file

@ -174,6 +174,7 @@
#define SOCK_FILE__SWAPON 0x00004000UL
#define SOCK_FILE__QUOTAON 0x00008000UL
#define SOCK_FILE__MOUNTON 0x00010000UL
#define SOCK_FILE__OPEN 0x00020000UL
#define FIFO_FILE__IOCTL 0x00000001UL
#define FIFO_FILE__READ 0x00000002UL
#define FIFO_FILE__WRITE 0x00000004UL