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Andrey Konovalov 8dcc1d3466 kasan: don't tag stacks allocated with pagealloc 
Patch series "kasan: support stack instrumentation for tag-based mode", v2.

This patch (of 5):

Prepare Software Tag-Based KASAN for stack tagging support.

With Tag-Based KASAN when kernel stacks are allocated via pagealloc (which
happens when CONFIG_VMAP_STACK is not enabled), they get tagged.  KASAN
instrumentation doesn't expect the sp register to be tagged, and this
leads to false-positive reports.

Fix by resetting the tag of kernel stack pointers after allocation.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Walter Wu <walter-zh.wu@mediatek.com>
Cc: Elena Petrova <lenaptr@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Link: http://lkml.kernel.org/r/cover.1596199677.git.andreyknvl@google.com
Link: http://lkml.kernel.org/r/cover.1596544734.git.andreyknvl@google.com
Link: http://lkml.kernel.org/r/12d8c678869268dd0884b01271ab592f30792abf.1596544734.git.andreyknvl@google.com
Link: http://lkml.kernel.org/r/01c678b877755bcf29009176592402cdf6f2cb15.1596199677.git.andreyknvl@google.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203497
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:28 -07:00
..
bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2020-08-03 18:27:40 -07:00
cgroup
Merge tag 'for-5.9/block-20200802' of git://git.kernel.dk/linux-block
2020-08-03 11:57:03 -07:00
configs
…
debug
Merge tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2020-08-04 13:49:43 -07:00
dma
Merge tag 'docs-5.9' of git://git.lwn.net/linux
2020-08-04 22:47:54 -07:00
entry
entry: Correct 'noinstr' attributes
2020-07-26 15:42:20 +02:00
events
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-08-05 20:13:21 -07:00
gcov
…
irq
Merge tag 'sched-fifo-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-06 11:55:43 -07:00
kcsan
Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
2020-08-01 09:26:27 +02:00
livepatch
…
locking
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2020-08-06 12:59:31 -07:00
power
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
printk
Merge tag 'printk-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
2020-08-04 22:22:25 -07:00
rcu
rcu: kasan: record and print call_rcu() call stack
2020-08-07 11:33:28 -07:00
sched
Merge tag 'sched-fifo-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-06 11:55:43 -07:00
time
Merge tag 'timers-core-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-04 18:17:37 -07:00
trace
Merge tag 'sched-fifo-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-06 11:55:43 -07:00
.gitignore
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acct.c
…
async.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
…
audit.c
Merge tag 'audit-pr-20200803' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2020-08-04 14:20:26 -07:00
audit.h
revert: 1320a4052e ("audit: trigger accompanying records when no rules present")
2020-07-29 10:00:36 -04:00
auditfilter.c
…
auditsc.c
Merge tag 'audit-pr-20200803' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2020-08-04 14:20:26 -07:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2020-07-30 11:15:58 -07:00
bounds.c
…
capability.c
…
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
…
crash_core.c
…
crash_dump.c
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cred.c
…
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-08-04 14:27:25 -07:00
extable.c
…
fail_function.c
…
fork.c
kasan: don't tag stacks allocated with pagealloc
2020-08-07 11:33:28 -07:00
freezer.c
…
futex.c
Merge tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2020-08-04 13:49:43 -07:00
gen_kheaders.sh
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groups.c
…
hung_task.c
…
iomem.c
…
irq_work.c
…
jump_label.c
…
kallsyms.c
Merge tag 'v5.8-rc7' into perf/core, to pick up fixes
2020-07-28 13:18:01 +02:00
kcmp.c
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Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
…
kexec_core.c
…
kexec_elf.c
…
kexec_file.c
Merge tag 'integrity-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2020-08-06 11:35:57 -07:00
kexec_internal.h
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kexec.c
…
kheaders.c
…
kmod.c
…
kprobes.c
kprobes: Remove unnecessary module_mutex locking from kprobe_optimizer()
2020-07-28 13:19:05 +02:00
ksysfs.c
…
kthread.c
kthread: remove incorrect comment in kthread_create_on_cpu()
2020-08-07 11:33:21 -07:00
latencytop.c
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Makefile
Merge tag 'core-entry-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-04 21:00:11 -07:00
module_signature.c
…
module_signing.c
…
module-internal.h
…
module.c
dyndbg: rename __verbose section to __dyndbg
2020-07-24 17:00:08 +02:00
notifier.c
…
nsproxy.c
…
padata.c
padata: remove padata_parallel_queue
2020-07-23 17:34:18 +10:00
panic.c
…
params.c
…
pid_namespace.c
pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid
2020-07-19 20:14:42 +02:00
pid.c
Merge tag 'cap-checkpoint-restore-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
2020-08-04 15:02:07 -07:00
profile.c
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ptrace.c
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range.c
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reboot.c
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relay.c
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resource.c
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rseq.c
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scs.c
mm: memcontrol: account kernel stack per node
2020-08-07 11:33:25 -07:00
seccomp.c
seccomp: Introduce addfd ioctl to seccomp user notifier
2020-07-14 16:29:42 -07:00
signal.c
signal: fix typo in dequeue_synchronous_signal()
2020-07-26 23:57:52 +02:00
smp.c
smp: Fix a potential usage of stale nr_cpus
2020-07-22 10:22:04 +02:00
smpboot.c
…
smpboot.h
…
softirq.c
Merge tag 'tasklets-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2020-08-04 13:40:35 -07:00
stackleak.c
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stacktrace.c
…
stop_machine.c
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sys_ni.c
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sys.c
prctl: exe link permission error changed from -EINVAL to -EPERM
2020-07-19 20:14:42 +02:00
sysctl_binary.c
…
sysctl-test.c
…
sysctl.c
mm: adjust vm_committed_as_batch according to vm overcommit policy
2020-08-07 11:33:26 -07:00
task_work.c
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taskstats.c
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test_kprobes.c
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torture.c
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tracepoint.c
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tsacct.c
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ucount.c
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uid16.c
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uid16.h
…
umh.c
exec: Implement kernel_execve
2020-07-21 08:24:52 -05:00
up.c
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user_namespace.c
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user-return-notifier.c
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user.c
…
usermode_driver.c
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utsname_sysctl.c
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utsname.c
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watch_queue.c
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watchdog_hld.c
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watchdog.c
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workqueue_internal.h
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workqueue.c
…