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| author | David Howells <dhowells@redhat.com> | 2009-03-28 23:23:01 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-28 17:30:00 -0700 |
| commit | 795e2fe0a3b69dbc040d7efcf517e0cbad6901d0 (patch) | |
| tree | 8d39fb27b46822003d316c8ce315211baa13b79d /include/linux/fs_struct.h | |
| parent | 7c2c7d993044cddc5010f6f429b100c63bc7dffb (diff) | |
| download | lwn-795e2fe0a3b69dbc040d7efcf517e0cbad6901d0.tar.gz lwn-795e2fe0a3b69dbc040d7efcf517e0cbad6901d0.zip | |
Annotate struct fs_struct's usage count restriction
Annotate struct fs_struct's usage count to indicate the restrictions upon it.
It may not be incremented, except by clone(CLONE_FS), as this affects the
check in check_unsafe_exec() in fs/exec.c.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fs_struct.h')
| -rw-r--r-- | include/linux/fs_struct.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h index a97c053d3a9a..18b467dbe278 100644 --- a/include/linux/fs_struct.h +++ b/include/linux/fs_struct.h @@ -4,7 +4,10 @@ #include <linux/path.h> struct fs_struct { - atomic_t count; + atomic_t count; /* This usage count is used by check_unsafe_exec() for + * security checking purposes - therefore it may not be + * incremented, except by clone(CLONE_FS). + */ rwlock_t lock; int umask; struct path root, pwd; |