kernel/linux.git/security/apparmor/label.c, branch v4.19.77

apparmor: fixup secid map conversion to using IDR

2018-06-07T08:50:49+00:00

The IDR conversion did not handle an error case for when allocating a mapping fails, and it did not ensure that mappings did not allocate or use a 0 value, which is used as an invalid secid. Which is used when a mapping fails. Fixes: 3ae7eb49a2be ("apparmor: Use an IDR to allocate apparmor secids") Signed-off-by: John Johansen

apparmor: fix typo "replace"

2018-05-03T07:49:35+00:00

Signed-off-by: Zygmunt Krynicki Acked-by: Christian Boltz Signed-off-by: John Johansen

apparmor: fix typo "comparison"

2018-05-03T07:48:58+00:00

Signed-off-by: Zygmunt Krynicki Acked-by: Christian Boltz Signed-off-by: John Johansen

apparmor: add support for mapping secids and using secctxes

2018-05-02T07:48:55+00:00

Use a radix tree to provide a map between the secid and the label, and along with it a basic ability to provide secctx conversion. Shared/cached secctx will be added later. Signed-off-by: John Johansen

apparmor: move context.h to cred.h

2018-02-09T19:30:01+00:00

Now that file contexts have been moved into file, and task context fns() and data have been split from the context, only the cred context remains in context.h so rename to cred.h to better reflect what it deals with. Signed-off-by: John Johansen

apparmor: root view labels should not be under user control

2018-02-09T19:30:01+00:00

The root view of the label parse should not be exposed to user control. Signed-off-by: John Johansen Acked-by: Seth Arnold

apparmor: provide a bounded version of label_parse

2018-02-09T19:30:01+00:00

some label/context sources might not be guaranteed to be null terminiated provide a size bounded version of label parse to deal with these. Signed-off-by: John Johansen Acked-by: Seth Arnold

apparmor: use the dfa to do label parse string splitting

2018-02-09T19:30:01+00:00

The current split scheme is actually wrong in that it splits ///& where that is invalid and should fail. Use the dfa to do a proper bounded split without having to worry about getting the string processing right in code. Signed-off-by: John Johansen Acked-by: Seth Arnold

Merge tag 'apparmor-pr-2017-11-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

2017-11-24T06:48:26+00:00

Pull apparmor updates from John Johansen: "No features this time, just minor cleanups and bug fixes. Cleanups: - fix spelling mistake: "resoure" -> "resource" - remove unused redundant variable stop - Fix bool initialization/comparison Bug Fixes: - initialized returned struct aa_perms - fix leak of null profile name if profile allocation fails - ensure that undecidable profile attachments fail - fix profile attachment for special unconfined profiles - fix locking when creating a new complain profile. - fix possible recursive lock warning in __aa_create_ns" * tag 'apparmor-pr-2017-11-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: apparmor: fix possible recursive lock warning in __aa_create_ns apparmor: fix locking when creating a new complain profile. apparmor: fix profile attachment for special unconfined profiles apparmor: ensure that undecidable profile attachments fail apparmor: fix leak of null profile name if profile allocation fails apparmor: remove unused redundant variable stop apparmor: Fix bool initialization/comparison apparmor: initialized returned struct aa_perms apparmor: fix spelling mistake: "resoure" -> "resource"

apparmor: fix possible recursive lock warning in __aa_create_ns

2017-11-21T10:17:16+00:00

Use mutex_lock_nested to provide lockdep the parent child lock ordering of the tree. This fixes the lockdep Warning [ 305.275177] ============================================ [ 305.275178] WARNING: possible recursive locking detected [ 305.275179] 4.14.0-rc7+ #320 Not tainted [ 305.275180] -------------------------------------------- [ 305.275181] apparmor_parser/1339 is trying to acquire lock: [ 305.275182] (&ns->lock){+.+.}, at: [] __aa_create_ns+0x6d/0x1e0 [ 305.275187] but task is already holding lock: [ 305.275187] (&ns->lock){+.+.}, at: [] aa_prepare_ns+0x3d/0xd0 [ 305.275190] other info that might help us debug this: [ 305.275191] Possible unsafe locking scenario: [ 305.275192] CPU0 [ 305.275193] ---- [ 305.275193] lock(&ns->lock); [ 305.275194] lock(&ns->lock); [ 305.275195] *** DEADLOCK *** [ 305.275196] May be due to missing lock nesting notation [ 305.275198] 2 locks held by apparmor_parser/1339: [ 305.275198] #0: (sb_writers#10){.+.+}, at: [] vfs_write+0x1a7/0x1d0 [ 305.275202] #1: (&ns->lock){+.+.}, at: [] aa_prepare_ns+0x3d/0xd0 [ 305.275205] stack backtrace: [ 305.275207] CPU: 1 PID: 1339 Comm: apparmor_parser Not tainted 4.14.0-rc7+ #320 [ 305.275208] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1ubuntu1 04/01/2014 [ 305.275209] Call Trace: [ 305.275212] dump_stack+0x85/0xcb [ 305.275214] __lock_acquire+0x141c/0x1460 [ 305.275216] ? __aa_create_ns+0x6d/0x1e0 [ 305.275218] ? ___slab_alloc+0x183/0x540 [ 305.275219] ? ___slab_alloc+0x183/0x540 [ 305.275221] lock_acquire+0xed/0x1e0 [ 305.275223] ? lock_acquire+0xed/0x1e0 [ 305.275224] ? __aa_create_ns+0x6d/0x1e0 [ 305.275227] __mutex_lock+0x89/0x920 [ 305.275228] ? __aa_create_ns+0x6d/0x1e0 [ 305.275230] ? trace_hardirqs_on_caller+0x11f/0x190 [ 305.275231] ? __aa_create_ns+0x6d/0x1e0 [ 305.275233] ? __lockdep_init_map+0x57/0x1d0 [ 305.275234] ? lockdep_init_map+0x9/0x10 [ 305.275236] ? __rwlock_init+0x32/0x60 [ 305.275238] mutex_lock_nested+0x1b/0x20 [ 305.275240] ? mutex_lock_nested+0x1b/0x20 [ 305.275241] __aa_create_ns+0x6d/0x1e0 [ 305.275243] aa_prepare_ns+0xc2/0xd0 [ 305.275245] aa_replace_profiles+0x168/0xf30 [ 305.275247] ? __might_fault+0x85/0x90 [ 305.275250] policy_update+0xb9/0x380 [ 305.275252] profile_load+0x7e/0x90 [ 305.275254] __vfs_write+0x28/0x150 [ 305.275256] ? rcu_read_lock_sched_held+0x72/0x80 [ 305.275257] ? rcu_sync_lockdep_assert+0x2f/0x60 [ 305.275259] ? __sb_start_write+0xdc/0x1c0 [ 305.275261] ? vfs_write+0x1a7/0x1d0 [ 305.275262] vfs_write+0xca/0x1d0 [ 305.275264] ? trace_hardirqs_on_caller+0x11f/0x190 [ 305.275266] SyS_write+0x49/0xa0 [ 305.275268] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 305.275271] RIP: 0033:0x7fa6b22e8c74 [ 305.275272] RSP: 002b:00007ffeaaee6288 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 305.275273] RAX: ffffffffffffffda RBX: 00007ffeaaee62a4 RCX: 00007fa6b22e8c74 [ 305.275274] RDX: 0000000000000a51 RSI: 00005566a8198c10 RDI: 0000000000000004 [ 305.275275] RBP: 0000000000000a39 R08: 0000000000000a51 R09: 0000000000000000 [ 305.275276] R10: 0000000000000000 R11: 0000000000000246 R12: 00005566a8198c10 [ 305.275277] R13: 0000000000000004 R14: 00005566a72ecb88 R15: 00005566a72ec3a8 Fixes: 73688d1ed0b8 ("apparmor: refactor prepare_ns() and make usable from different views") Signed-off-by: John Johansen