On Mon, Aug 3, 2020 at 12:14 PM Lakshmi Ramasubramanian <nramas@xxxxxxxxxxxxxxxxxxx> wrote: > > On 8/3/20 8:11 AM, Stephen Smalley wrote: > > > > Possibly I'm missing something but with these patches applied on top of > > next-integrity, and the following lines added to /etc/ima/ima-policy: > > > > measure func=LSM_STATE template=ima-buf > > measure func=LSM_POLICY > > > > I still don't get the selinux-state or selinux-policy-hash entries in > > the ascii_runtime_measurements file. No errors during loading of the > > ima policy as far as I can see. > > > > Could you please check if the following config is set? > CONFIG_IMA_QUEUE_EARLY_BOOT_DATA=y Yes, I have that set. > Try changing /sys/fs/selinux/checkreqprot and check > ascii_runtime_measurements file again? No change. Likewise for changing enforce or running load_policy again. > Also, could you please check if > /sys/kernel/security/integrity/ima/policy contains LSM_STATE and > LSM_POLICY entries? Yes, it does. However, I noticed that if I reduce the policy to only contain those entries and no others and reboot, then I get measurements. Whereas if I append them to an existing policy like the one below, they seem to be ignored: dont_measure fsmagic=0x9fa0 dont_measure fsmagic=0x62656572 dont_measure fsmagic=0x64626720 dont_measure fsmagic=0x1021994 dont_measure fsmagic=0x858458f6 dont_measure fsmagic=0x73636673 measure func=BPRM_CHECK measure func=MMAP_CHECK mask=MAY_EXEC measure func=MODULE_CHECK uid=0 measure func=LSM_STATE template=ima-buf measure func=LSM_POLICY Also, I noticed the following in my dmesg output: [ 68.870715] ------------[ cut here ]------------ [ 68.870715] WARNING: CPU: 2 PID: 1 at mm/page_alloc.c:4826 __alloc_pages_nodemask+0x627/0x700 [ 68.870715] Modules linked in: 8139too crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel qxl serio_raw drm_ttm_helper ttm drm_kms_helper virtio_console cec drm 8139cp ata_generic mii pata_acpi floppy qemu_fw_cfg fuse [ 68.870715] CPU: 2 PID: 1 Comm: systemd Not tainted 5.8.0-rc2+ #44 [ 68.870715] RIP: 0010:__alloc_pages_nodemask+0x627/0x700 [ 68.870715] Code: ff ff 75 6c 48 8b 85 48 ff ff ff 4c 89 c2 44 89 e6 44 89 ff 41 c6 45 d0 00 49 89 45 b8 e8 41 e2 ff ff 49 89 c6 e9 9d fc ff ff <0f> 0b e9 d4 fd ff ff 0f 0b e9 bc fc ff ff 0f 0b e9 f9 fd ff ff e8 [ 68.870715] RSP: 0000:ffff8881e82a7a18 EFLAGS: 00010246 [ 68.870715] RAX: ffffed103d054f48 RBX: 1ffff1103d054f48 RCX: 0000000000000000 [ 68.870715] RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000000 [ 68.870715] RBP: ffff8881e82a7ae8 R08: ffffffffaa3fe2d5 R09: 0000000000000001 [ 68.870715] R10: fffffbfff5a88f0f R11: 0000000000000001 R12: 00000000007eef6a [ 68.870715] R13: 0000000000040cc0 R14: 000000000000000b R15: ffffffffadde766b [ 68.870715] FS: 00007fdeb168c600(0000) GS:ffff8881e9800000(0000) knlGS:0000000000000000 [ 68.870715] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.870715] CR2: 00007fdeb17dd1d6 CR3: 00000001cc2d2002 CR4: 00000000003606e0 [ 68.870715] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.870715] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.870715] Call Trace: [ 68.870715] ? sched_clock_cpu+0xf5/0x110 [ 68.870715] ? __alloc_pages_slowpath.constprop.0+0x17a0/0x17a0 [ 68.870715] ? match_held_lock+0x2e/0x240 [ 68.870715] ? policy_nodemask+0x1a/0xa0 [ 68.870715] ? policy_node+0x56/0x60 [ 68.870715] kmalloc_order+0x25/0xc0 [ 68.870715] kmalloc_order_trace+0x1d/0x140 [ 68.870715] kmemdup+0x1a/0x40 [ 68.870715] ima_queue_data+0x61/0x370 [ 68.870715] ima_measure_lsm_data+0x32/0x60 [ 68.870715] selinux_measure_state+0x2b8/0x2bd [ 68.870715] ? selinux_event_name+0xe0/0xe0 [ 68.870715] ? rcu_is_watching+0x39/0x50 [ 68.870715] security_load_policy+0x44c/0x8e0 [ 68.870715] ? mark_lock+0xa6/0xbd0 [ 68.870715] ? security_change_sid+0x90/0x90 [ 68.870715] ? mark_held_locks+0x3e/0xa0 [ 68.870715] ? lockdep_hardirqs_on_prepare+0x100/0x260 [ 68.870715] ? asm_exc_page_fault+0x1e/0x30 [ 68.870715] ? lockdep_hardirqs_on+0xc5/0x1b0 [ 68.870715] ? asm_exc_page_fault+0x1e/0x30 [ 68.870715] ? copy_user_enhanced_fast_string+0xe/0x30 [ 68.870715] sel_write_load+0x157/0x260 [ 68.870715] vfs_write+0x135/0x290 [ 68.870715] ksys_write+0xb1/0x140 [ 68.870715] ? __ia32_sys_read+0x50/0x50 [ 68.870715] ? lockdep_hardirqs_on_prepare+0x100/0x260 [ 68.870715] ? do_syscall_64+0x12/0xb0 [ 68.870715] do_syscall_64+0x52/0xb0 [ 68.870715] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 68.870715] RIP: 0033:0x7fdeb2539497 [ 68.870715] Code: Bad RIP value. [ 68.870715] RSP: 002b:00007fff6352b308 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 68.870715] RAX: ffffffffffffffda RBX: 0000000000000020 RCX: 00007fdeb2539497 [ 68.870715] RDX: 00000000007eef6a RSI: 00007fdeb0de1000 RDI: 0000000000000004 [ 68.870715] RBP: 0000000000000004 R08: 00007fdeb25d0040 R09: 00007fff6352b1a0 [ 68.870715] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdeb0de1000 [ 68.870715] R13: 00000000007eef6a R14: 000000000000000f R15: 0000000000000003 [ 68.870715] irq event stamp: 23486085 [ 68.870715] hardirqs last enabled at (23486085): [<ffffffffaa419406>] _raw_spin_unlock_irqrestore+0x46/0x60 [ 68.870715] hardirqs last disabled at (23486084): [<ffffffffaa419443>] _raw_spin_lock_irqsave+0x23/0x90 [ 68.870715] softirqs last enabled at (23486074): [<ffffffffaa8004f3>] __do_softirq+0x4f3/0x662 [ 68.870715] softirqs last disabled at (23486067): [<ffffffffaa601072>] asm_call_on_stack+0x12/0x20 [ 68.870715] ---[ end trace fb02740ff6f4d0cd ]---
