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Andrey Konovalov cdb4c18935 FROMLIST: kasan, fork: reset pointer tags of vmapped stacks 
[Combines a FROMGIT patch and a FROMLIST fix for it.]

Once tag-based KASAN modes start tagging vmalloc() allocations, kernel
stacks start getting tagged if CONFIG_VMAP_STACK is enabled.

Reset the tag of kernel stack pointers after allocation in
alloc_thread_stack_node().

For SW_TAGS KASAN, when CONFIG_KASAN_STACK is enabled, the instrumentation
can't handle the SP register being tagged.

For HW_TAGS KASAN, there's no instrumentation-related issues.  However,
the impact of having a tagged SP register needs to be properly evaluated,
so keep it non-tagged for now.

Note, that the memory for the stack allocation still gets tagged to catch
vmalloc-into-stack out-of-bounds accesses.

Link: https://lkml.kernel.org/r/c6c96f012371ecd80e1936509ebcd3b07a5956f7.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
(cherry picked from commit 9d2dae85d689202c56068ce62e20821ad91c3606
 git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm)
Link: https://lore.kernel.org/linux-mm/f50c5f96ef896d7936192c888b0c0a7674e33184.1644943792.git.andreyknvl@google.com/
Bug: 217222520
Change-Id: Ie723b03f1b857bc841cffc9a424b2791c97044a6
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
2022-02-15 17:58:45 +01:00
..
bpf
Merge 5.15.22 into android13-5.15
2022-02-09 08:15:44 +01:00
cgroup
Merge 5.15.22 into android13-5.15
2022-02-09 08:15:44 +01:00
configs
drivers/char: remove /dev/kmem for good
2021-05-07 00:26:34 -07:00
debug
kdb: Adopt scheduler's task classification
2021-11-18 19:17:06 +01:00
dma
ANDROID: iommu/dma: Add support for DMA_ATTR_SYS_CACHE_ONLY_NWA
2022-02-01 22:15:37 +00:00
entry
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-25 09:49:07 +01:00
events
Merge 5.15.22 into android13-5.15
2022-02-09 08:15:44 +01:00
gcov
Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
2021-06-22 11:07:18 -07:00
irq
Merge 5.15.3 into android13-5.15
2021-11-19 15:38:07 +01:00
kcsan
Merge tag 'locking-debug-2021-09-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2021-09-02 13:00:15 -07:00
livepatch
livepatch: Replace deprecated CPU-hotplug functions.
2021-08-19 12:00:24 +02:00
locking
ANDROID: Re-apply vendor hooks for rt_mutex information of blocked tasks
2022-01-25 12:05:42 +09:00
power
Merge 5.15.19 into android13-5.15
2022-02-02 09:32:24 +01:00
printk
Merge 5.15.5 into android13-5.15
2021-11-25 10:40:10 +01:00
rcu
UPSTREAM: rcu: Avoid alloc_pages() when recording stack
2022-02-14 15:50:54 +01:00
sched
ANDROID: sched: Don't allow frozen asymmetric tasks to remain on the rq
2022-02-10 11:00:56 +00:00
time
Merge 5.15.17 into android13-5.15
2022-01-31 12:35:09 +01:00
trace
Merge 5.15.19 into android13-5.15
2022-02-02 09:32:24 +01:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
acct.c
kernel/acct.c: use dedicated helper to access rlimit values
2021-09-08 11:50:26 -07:00
async.c
kernel/async.c: remove async_unregister_domain()
2021-05-07 00:26:33 -07:00
audit_fsnotify.c
audit_alloc_mark(): don't open-code ERR_CAST()
2021-02-23 10:25:27 -05:00
audit_tree.c
audit: move put_tree() to avoid trim_trees refcount underflow and UAF
2021-08-24 18:52:36 -04:00
audit_watch.c
…
audit.c
audit: improve audit queue handling when "audit=1" on cmdline
2022-02-08 18:34:03 +01:00
audit.h
audit: add header protection to kernel/audit.h
2021-07-19 22:38:24 -04:00
auditfilter.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
auditsc.c
audit: fix possible null-pointer dereference in audit_filter_rules
2021-10-18 18:27:47 -04:00
backtracetest.c
…
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
cfi.c
cfi: Use rcu_read_{un}lock_sched_notrace
2021-08-11 13:11:12 -07:00
compat.c
arch: remove compat_alloc_user_space
2021-09-08 15:32:35 -07:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-08-16 18:55:32 +02:00
cpu.c
Merge 5.15.6 into android13-5.15
2021-12-02 09:55:34 +01:00
crash_core.c
kernel/crash_core: suppress unknown crashkernel parameter warning
2021-12-29 12:28:49 +01:00
crash_dump.c
…
cred.c
ANDROID: kernel: Add restricted vendor hook in creds
2021-10-29 14:20:10 +08:00
delayacct.c
delayacct: Add sysctl to enable at runtime
2021-05-12 11:43:25 +02:00
dma.c
…
exec_domain.c
…
exit.c
io_uring: remove files pointer in cancellation functions
2021-08-23 13:10:37 -06:00
extable.c
…
fail_function.c
…
fork.c
FROMLIST: kasan, fork: reset pointer tags of vmapped stacks
2022-02-15 17:58:45 +01:00
freezer.c
FROMLIST: sched: Defer wakeup in ttwu() for unschedulable frozen tasks
2022-02-10 09:29:57 +00:00
futex.c
Merge tag 'v5.15-rc1' into android-mainline
2021-09-16 09:51:19 +02:00
gen_kheaders.sh
kbuild: clean up ${quiet} checks in shell scripts
2021-05-27 04:01:50 +09:00
gki_module.c
ANDROID: GKI: Add module load time protected symbol lookup
2022-01-05 18:38:02 +00:00
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
FROMLIST: freezer: Add frozen_or_skipped() helper function
2022-02-10 09:29:34 +00:00
iomem.c
…
irq_work.c
Merge 8ecfa36cd4 ("Merge tag 'riscv-for-linus-5.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux") into android-mainline
2021-06-13 15:19:53 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-05 10:46:20 +02:00
kallsyms.c
module: add printk formats to add module build ID to stacktraces
2021-07-08 11:48:22 -07:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/rwlock: Provide RT variant
2021-08-17 17:50:51 +02:00
Kconfig.preempt
sched/core: Disable CONFIG_SCHED_CORE by default
2021-06-28 22:43:05 +02:00
kcov.c
…
kexec_core.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
kexec_elf.c
…
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-07 00:26:32 -07:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
kexec: avoid compat_alloc_user_space
2021-09-08 15:32:34 -07:00
kheaders.c
…
kmod.c
modules: add CONFIG_MODPROBE_PATH
2021-05-07 00:26:33 -07:00
kprobes.c
kprobes: Limit max data_size of the kretprobe instances
2021-12-08 09:04:41 +01:00
ksysfs.c
…
kthread.c
Merge commit c288d9cd71 ("Merge tag 'for-5.14/io_uring-2021-06-30' of git://git.kernel.dk/linux-block") into android-mainline
2021-07-12 10:02:27 +01:00
latencytop.c
…
Makefile
ANDROID: GKI: Add module load time protected symbol lookup
2022-01-05 18:38:02 +00:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
ANDROID: GKI: Add module load time protected symbol lookup
2022-01-05 18:38:02 +00:00
module.c
ANDROID: GKI: Disable security lockdown for unsigned modules
2022-01-14 20:01:55 +00:00
notifier.c
notifier: Remove atomic_notifier_call_chain_robust()
2021-08-16 18:55:32 +02:00
nsproxy.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
padata.c
padata: Remove repeated verbose license text
2021-08-27 16:30:18 +08:00
panic.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
params.c
params: lift param_set_uint_minmax to common code
2021-08-16 14:42:22 +02:00
pid_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
pid.c
Merge 4520dcbe0d ("Merge tag 'for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply") into android-mainline
2021-09-02 09:42:36 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-08 11:50:26 -07:00
ptrace.c
sched: Change task_struct::state
2021-06-18 11:43:09 +02:00
range.c
…
reboot.c
ANDROID: reboot: Export reboot_mode
2021-09-28 08:49:54 -07:00
regset.c
…
relay.c
…
resource_kunit.c
…
resource.c
kernel/resource: fix return code check in __request_free_mem_region
2021-05-14 19:41:32 -07:00
rseq.c
KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest
2021-09-22 10:24:01 -04:00
scftorture.c
scftorture: Avoid NULL pointer exception on early exit
2021-07-27 11:39:30 -07:00
scs.c
scs: Release kasan vmalloc poison in scs_free process
2021-11-18 19:16:29 +01:00
seccomp.c
Merge branch 'exit-cleanups-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-09-01 14:52:05 -07:00
signal.c
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-25 09:49:07 +01:00
smp.c
smp: Fix all kernel-doc warnings
2021-08-11 14:47:16 +02:00
smpboot.c
smpboot: Replace deprecated CPU-hotplug functions.
2021-08-10 14:57:42 +02:00
smpboot.h
…
softirq.c
ANDROID: softirq: Export irq_handler_exit tracepoint
2021-11-11 18:55:19 +00:00
stackleak.c
…
stacktrace.c
…
static_call.c
static_call: Fix static_call_text_reserved() vs __init
2021-07-05 10:46:33 +02:00
stop_machine.c
ANDROID: sched: allow access to critical common code for CPU Pause
2021-11-09 00:42:10 +00:00
sys_ni.c
compat: remove some compat entry points
2021-09-08 15:32:35 -07:00
sys.c
ANDROID: Change anon vma name limit from 80 to 256
2022-01-18 16:03:55 -08:00
sysctl-test.c
kernel/sysctl-test: Remove some casts which are no-longer required
2021-06-23 16:41:24 -06:00
sysctl.c
ANDROID: Fix "one_thousand" defined but not used warning
2022-01-07 07:22:39 +00:00
task_work.c
kasan: record task_work_add() call stack
2021-04-30 11:20:42 -07:00
taskstats.c
…
test_kprobes.c
…
torture.c
torture: Replace deprecated CPU-hotplug functions.
2021-08-10 10:48:07 -07:00
tracepoint.c
Merge 996fe06160 ("Merge tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux") into android-mainline
2021-09-14 16:16:54 +02:00
tsacct.c
taskstats: Cleanup the use of task->exit_code
2022-01-27 11:05:35 +01:00
ucount.c
ucount: Make get_ucount a safe get_user replacement
2022-02-01 17:27:00 +01:00
uid16.c
…
uid16.h
…
umh.c
kernel/umh.c: fix some spelling mistakes
2021-05-07 00:26:34 -07:00
up.c
Merge tag 'locking-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2021-05-09 13:07:03 -07:00
user_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
user-return-notifier.c
…
user.c
fs/epoll: use a per-cpu counter for user's watches count
2021-09-08 11:50:27 -07:00
usermode_driver.c
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-07-03 11:41:14 -07:00
utsname_sysctl.c
…
utsname.c
…
watch_queue.c
watch_queue: rectify kernel-doc for init_watch()
2021-01-26 11:16:34 +00:00
watchdog_hld.c
…
watchdog.c
kernel: watchdog: modify the explanation related to watchdog thread
2021-06-29 10:53:46 -07:00
workqueue_internal.h
workqueue: Assign a color to barrier work items
2021-08-17 07:49:10 -10:00
workqueue.c
UPSTREAM: workqueue, kasan: avoid alloc_pages() when recording stack
2022-02-14 15:50:54 +01:00