Revision 0620fddb56dfaf0e1034eeb69d79c73b361debbf authored by Eric Biggers on 08 June 2017, 13:49:26 UTC, committed by James Morris on 09 June 2017, 03:29:48 UTC
While a 'struct key' itself normally does not contain sensitive
information, Documentation/security/keys.txt actually encourages this:
"Having a payload is not required; and the payload can, in fact,
just be a value stored in the struct key itself."
In case someone has taken this advice, or will take this advice in the
future, zero the key structure before freeing it. We might as well, and
as a bonus this could make it a bit more difficult for an adversary to
determine which keys have recently been in use.
This is safe because the key_jar cache does not use a constructor.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
1 parent ee618b4
| File | Mode | Size |
|---|---|---|
| bpf | ||
| cgroup | ||
| configs | ||
| debug | ||
| events | ||
| gcov | ||
| irq | ||
| livepatch | ||
| locking | ||
| power | ||
| printk | ||
| rcu | ||
| sched | ||
| time | ||
| trace | ||
| .gitignore | -rw-r--r-- | 69 bytes |
| Kconfig.freezer | -rw-r--r-- | 52 bytes |
| Kconfig.hz | -rw-r--r-- | 1.6 KB |
| Kconfig.locks | -rw-r--r-- | 4.8 KB |
| Kconfig.preempt | -rw-r--r-- | 2.1 KB |
| Makefile | -rw-r--r-- | 3.9 KB |
| acct.c | -rw-r--r-- | 15.4 KB |
| async.c | -rw-r--r-- | 9.9 KB |
| audit.c | -rw-r--r-- | 61.8 KB |
| audit.h | -rw-r--r-- | 10.9 KB |
| audit_fsnotify.c | -rw-r--r-- | 6.1 KB |
| audit_tree.c | -rw-r--r-- | 23.9 KB |
| audit_watch.c | -rw-r--r-- | 14.5 KB |
| auditfilter.c | -rw-r--r-- | 33.9 KB |
| auditsc.c | -rw-r--r-- | 65.0 KB |
| backtracetest.c | -rw-r--r-- | 2.1 KB |
| bounds.c | -rw-r--r-- | 703 bytes |
| capability.c | -rw-r--r-- | 13.9 KB |
| compat.c | -rw-r--r-- | 29.7 KB |
| configs.c | -rw-r--r-- | 2.8 KB |
| context_tracking.c | -rw-r--r-- | 6.3 KB |
| cpu.c | -rw-r--r-- | 44.3 KB |
| cpu_pm.c | -rw-r--r-- | 6.5 KB |
| crash_core.c | -rw-r--r-- | 10.5 KB |
| crash_dump.c | -rw-r--r-- | 1.3 KB |
| cred.c | -rw-r--r-- | 21.5 KB |
| delayacct.c | -rw-r--r-- | 4.5 KB |
| dma.c | -rw-r--r-- | 3.6 KB |
| elfcore.c | -rw-r--r-- | 396 bytes |
| exec_domain.c | -rw-r--r-- | 1.4 KB |
| exit.c | -rw-r--r-- | 44.0 KB |
| extable.c | -rw-r--r-- | 4.3 KB |
| fork.c | -rw-r--r-- | 58.8 KB |
| freezer.c | -rw-r--r-- | 4.4 KB |
| futex.c | -rw-r--r-- | 93.7 KB |
| futex_compat.c | -rw-r--r-- | 4.5 KB |
| groups.c | -rw-r--r-- | 5.2 KB |
| hung_task.c | -rw-r--r-- | 6.2 KB |
| irq_work.c | -rw-r--r-- | 4.4 KB |
| jump_label.c | -rw-r--r-- | 17.9 KB |
| kallsyms.c | -rw-r--r-- | 16.5 KB |
| kcmp.c | -rw-r--r-- | 4.4 KB |
| kcov.c | -rw-r--r-- | 6.9 KB |
| kexec.c | -rw-r--r-- | 6.8 KB |
| kexec_core.c | -rw-r--r-- | 29.5 KB |
| kexec_file.c | -rw-r--r-- | 25.4 KB |
| kexec_internal.h | -rw-r--r-- | 818 bytes |
| kmod.c | -rw-r--r-- | 19.6 KB |
| kprobes.c | -rw-r--r-- | 62.6 KB |
| ksysfs.c | -rw-r--r-- | 6.3 KB |
| kthread.c | -rw-r--r-- | 32.1 KB |
| latencytop.c | -rw-r--r-- | 7.9 KB |
| membarrier.c | -rw-r--r-- | 2.5 KB |
| memremap.c | -rw-r--r-- | 12.1 KB |
| module-internal.h | -rw-r--r-- | 458 bytes |
| module.c | -rw-r--r-- | 110.1 KB |
| module_signing.c | -rw-r--r-- | 2.2 KB |
| notifier.c | -rw-r--r-- | 16.3 KB |
| nsproxy.c | -rw-r--r-- | 6.5 KB |
| padata.c | -rw-r--r-- | 25.2 KB |
| panic.c | -rw-r--r-- | 15.8 KB |
| params.c | -rw-r--r-- | 23.1 KB |
| pid.c | -rw-r--r-- | 15.1 KB |
| pid_namespace.c | -rw-r--r-- | 11.8 KB |
| profile.c | -rw-r--r-- | 14.8 KB |
| ptrace.c | -rw-r--r-- | 32.7 KB |
| range.c | -rw-r--r-- | 3.0 KB |
| reboot.c | -rw-r--r-- | 13.3 KB |
| relay.c | -rw-r--r-- | 32.1 KB |
| resource.c | -rw-r--r-- | 39.3 KB |
| seccomp.c | -rw-r--r-- | 24.1 KB |
| signal.c | -rw-r--r-- | 94.8 KB |
| smp.c | -rw-r--r-- | 21.0 KB |
| smpboot.c | -rw-r--r-- | 13.3 KB |
| smpboot.h | -rw-r--r-- | 601 bytes |
| softirq.c | -rw-r--r-- | 19.0 KB |
| stacktrace.c | -rw-r--r-- | 1.8 KB |
| stop_machine.c | -rw-r--r-- | 17.1 KB |
| sys.c | -rw-r--r-- | 58.2 KB |
| sys_ni.c | -rw-r--r-- | 7.2 KB |
| sysctl.c | -rw-r--r-- | 67.5 KB |
| sysctl_binary.c | -rw-r--r-- | 50.9 KB |
| task_work.c | -rw-r--r-- | 3.3 KB |
| taskstats.c | -rw-r--r-- | 15.4 KB |
| test_kprobes.c | -rw-r--r-- | 7.4 KB |
| torture.c | -rw-r--r-- | 21.0 KB |
| tracepoint.c | -rw-r--r-- | 14.6 KB |
| tsacct.c | -rw-r--r-- | 5.1 KB |
| ucount.c | -rw-r--r-- | 5.7 KB |
| uid16.c | -rw-r--r-- | 5.0 KB |
| up.c | -rw-r--r-- | 2.0 KB |
| user-return-notifier.c | -rw-r--r-- | 1.3 KB |
| user.c | -rw-r--r-- | 5.4 KB |
| user_namespace.c | -rw-r--r-- | 27.4 KB |
| utsname.c | -rw-r--r-- | 3.6 KB |
| utsname_sysctl.c | -rw-r--r-- | 3.0 KB |
| watchdog.c | -rw-r--r-- | 22.8 KB |
| watchdog_hld.c | -rw-r--r-- | 6.5 KB |
| workqueue.c | -rw-r--r-- | 155.0 KB |
| workqueue_internal.h | -rw-r--r-- | 2.2 KB |
Computing file changes ...
