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Calling kmalloc(GFP_NOIO) with order == PAGE_ALLOC_COSTLY_ORDER is not
recommended because it might fall into infinite retry loop without
invoking the OOM killer.
Since aa_dfa_unpack() is the only caller of kvzalloc() and
aa_dfa_unpack() which is calling kvzalloc() via unpack_table() is
doing kzalloc(GFP_KERNEL), it is safe to use GFP_KERNEL from
__aa_kvmalloc().
Since aa_simple_write_to_buffer() is the only caller of kvmalloc()
and aa_simple_write_to_buffer() is calling copy_from_user() which
is GFP_KERNEL context (see memdup_user_nul()), it is safe to use
GFP_KERNEL from __aa_kvmalloc().
Therefore, replace GFP_NOIO with GFP_KERNEL. Also, since we have
vmalloc() fallback, add __GFP_NORETRY so that we don't invoke the OOM
killer by kmalloc(GFP_KERNEL) with order == PAGE_ALLOC_COSTLY_ORDER.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen@canonical.com>
This is a follow-up to commit b5b3ee6c "apparmor: no need to delay vfree()".
Since vmalloc() will do "size = PAGE_ALIGN(size);",
we don't need to check for "size >= sizeof(struct work_struct)".
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen@canonical.com>
vfree() can be called from interrupt contexts now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
currently apparmor name parsing is only correctly handling
:<NS>:<profile>
but
:<NS>://<profile>
is also a valid form and what is exported to userspace.
Signed-off-by: John Johansen <john.johansen@canonical.com>
It isn't needed. If you don't set the type of the data associated with
that type it is a pretty obvious programming bug. So why waste the cycles?
Signed-off-by: Eric Paris <eparis@redhat.com>
Linus found that the gigantic size of the common audit data caused a big
perf hit on something as simple as running stat() in a loop. This patch
requires LSMs to declare the LSM specific portion separately rather than
doing it in a union. Thus each LSM can be responsible for shrinking their
portion and don't have to pay a penalty just because other LSMs have a
bigger space requirement.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the following sparse warnings:
security/apparmor/lib.c:37:6: warning: symbol 'aa_split_fqname' was not declared. Should it be static?
security/apparmor/lib.c:63:6: warning: symbol 'aa_info_message' was not declared. Should it be static?
security/apparmor/lib.c:83:6: warning: symbol 'kvmalloc' was not declared. Should it be static?
security/apparmor/lib.c:123:6: warning: symbol 'kvfree' was not declared. Should it be static?
Signed-off-by: James Morris <jmorris@namei.org>
Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).
To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
Removal of mm.h from scatterlist.h was tried and was found not feasible
on most archs, so the link was cutoff earlier.
Hope people are OK with tiny include file.
Note, that mm_types.h is still dragged in, but it is a separate story.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As per Dan Carpenter <error27@gmail.com>
If we have a ns name without a following profile then in the original
code it did "*ns_name = &name[1];". "name" is NULL so "*ns_name" is
0x1. That isn't useful and could cause an oops when this function is
called from aa_remove_profiles().
Beyond this the assignment of the namespace name was wrong in the case
where the profile name was provided as it was being set to &name[1]
after name = skip_spaces(split + 1);
Move the ns_name assignment before updating name for the split and
also add skip_spaces, making the interface more robust.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
Miscellaneous functions and defines needed by AppArmor, including
the base path resolution routines.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
