Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Andrey Ryabinin 0207df4fa1 kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN ... KASAN learns about hotadded memory via the memory hotplug notifier. devm_memremap_pages() intentionally skips calling memory hotplug notifiers. So KASAN doesn't know anything about new memory added by devm_memremap_pages(). This causes a crash when KASAN tries to access non-existent shadow memory: BUG: unable to handle kernel paging request at ffffed0078000000 RIP: 0010:check_memory_region+0x82/0x1e0 Call Trace: memcpy+0x1f/0x50 pmem_do_bvec+0x163/0x720 pmem_make_request+0x305/0xac0 generic_make_request+0x54f/0xcf0 submit_bio+0x9c/0x370 submit_bh_wbc+0x4c7/0x700 block_read_full_page+0x5ef/0x870 do_read_cache_page+0x2b8/0xb30 read_dev_sector+0xbd/0x3f0 read_lba.isra.0+0x277/0x670 efi_partition+0x41a/0x18f0 check_partition+0x30d/0x5e9 rescan_partitions+0x18c/0x840 __blkdev_get+0x859/0x1060 blkdev_get+0x23f/0x810 __device_add_disk+0x9c8/0xde0 pmem_attach_disk+0x9a8/0xf50 nvdimm_bus_probe+0xf3/0x3c0 driver_probe_device+0x493/0xbd0 bus_for_each_drv+0x118/0x1b0 __device_attach+0x1cd/0x2b0 bus_probe_device+0x1ac/0x260 device_add+0x90d/0x1380 nd_async_device_register+0xe/0x50 async_run_entry_fn+0xc3/0x5d0 process_one_work+0xa0a/0x1810 worker_thread+0x87/0xe80 kthread+0x2d7/0x390 ret_from_fork+0x3a/0x50 Add kasan_add_zero_shadow()/kasan_remove_zero_shadow() - post mm_init() interface to map/unmap kasan_zero_page at requested virtual addresses. And use it to add/remove the shadow memory for hotplugged/unplugged device memory. Link: http://lkml.kernel.org/r/20180629164932.740-1-aryabinin@virtuozzo.com Fixes: 41e94a8513 ("add devm_memremap_pages") Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Reported-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Tested-by: Dan Williams <dan.j.williams@intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-08-17 16:20:30 -07:00
..
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-08-15 15:04:25 -07:00
cgroup	kernfs: allow creating kernfs objects with arbitrary uid/gid	2018-07-20 23:44:35 -07:00
configs	kconfig: tinyconfig: remove stale stack protector fixups	2018-06-15 07:15:28 +09:00
debug	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
dma	dma-mapping updates for 4.19	2018-08-14 11:11:52 -07:00
events	arm64 updates for 4.19	2018-08-14 16:39:13 -07:00
gcov	gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT	2018-06-08 18:56:02 +09:00
irq	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 10:47:26 -07:00
livepatch	livepatch: Allow to call a custom callback when freeing shadow variables	2018-04-17 13:42:48 +02:00
locking	drm pull for 4.19-rc1	2018-08-15 17:39:07 -07:00
power	Power management updates for 4.19-rc1	2018-08-14 13:12:24 -07:00
printk	drm pull for 4.19-rc1	2018-08-15 17:39:07 -07:00
rcu	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 11:25:07 -07:00
sched	Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-14 09:46:06 -07:00
time	Merge branch 'parisc-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2018-08-13 19:18:02 -07:00
trace	Printk changes for 4.19	2018-08-15 11:18:53 -07:00
.gitignore
acct.c	kernel/acct.c: fix the acct->needcheck check in check_free_space()	2018-01-04 16:45:09 -08:00
async.c	kernel/async.c: revert "async: simplify lowest_in_progress()"	2018-02-06 18:32:44 -08:00
audit.c	audit: use ktime_get_coarse_real_ts64() for timestamps	2018-07-17 14:45:08 -04:00
audit.h	audit: track the owner of the command mutex ourselves	2018-02-23 11:22:22 -05:00
audit_fsnotify.c	fsnotify: add fsnotify_add_inode_mark() wrappers	2018-05-18 14:58:22 +02:00
audit_tree.c	audit: check audit_enabled in audit_tree_log_remove_rule()	2018-06-28 11:41:02 -04:00
audit_watch.c	audit: fix use-after-free in audit_add_watch	2018-07-18 11:43:36 -04:00
auditfilter.c	audit: rename FILTER_TYPE to FILTER_EXCLUDE	2018-06-19 10:39:54 -04:00
auditsc.c	audit/stable-4.18 PR 20180814	2018-08-15 10:46:54 -07:00
backtracetest.c
bounds.c
capability.c
compat.c	time: Enable get/put_compat_itimerspec64 always	2018-06-24 14:39:47 +02:00
configs.c
context_tracking.c
cpu.c	cpu/hotplug: Non-SMP machines do not make use of booted_once	2018-08-14 15:00:00 -07:00
cpu_pm.c
crash_core.c	mm: split page_type out from _mapcount	2018-06-07 17:34:37 -07:00
crash_dump.c
cred.c
delayacct.c	delayacct: Use raw_spinlocks	2018-04-27 14:34:51 +02:00
dma.c	proc: introduce proc_create_single{,_data}	2018-05-16 07:23:35 +02:00
elfcore.c
exec_domain.c	proc: introduce proc_create_single{,_data}	2018-05-16 07:23:35 +02:00
exit.c	kernel: use kernel_wait4() instead of sys_wait4()	2018-04-02 20:14:51 +02:00
extable.c	extable: Make init_kernel_text() global	2018-02-21 16:54:06 +01:00
fail_function.c	bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe	2018-06-21 12:33:19 +02:00
fork.c	fs: fsnotify: account fsnotify metadata to kmemcg	2018-08-17 16:20:30 -07:00
freezer.c	PM / reboot: Eliminate race between reboot and suspend	2018-08-06 12:35:20 +02:00
futex.c	pids: introduce find_get_task_by_vpid() helper	2018-02-06 18:32:46 -08:00
futex_compat.c
groups.c
hung_task.c	kernel/hung_task.c: show all hung tasks before panic	2018-06-07 17:34:39 -07:00
iomem.c	memremap: split devm_memremap_pages() and memremap() infrastructure	2018-05-15 23:08:33 -07:00
irq_work.c	irq/work: Improve the flag definitions	2018-01-08 19:43:15 +01:00
jump_label.c	jump_label: Disable jump labels in __exit code	2018-03-20 08:57:17 +01:00
kallsyms.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt	kconfig: include kernel/Kconfig.preempt from init/Kconfig	2018-08-02 08:06:54 +09:00
kcov.c	sched/core / kcov: avoid kcov_area during task switch	2018-06-15 07:55:24 +09:00
kexec.c	kexec: add call to LSM hook in original kexec_load syscall	2018-07-16 12:31:57 -07:00
kexec_core.c	kexec: yield to scheduler when loading kimage segments	2018-06-15 07:55:24 +09:00
kexec_file.c	treewide: Use array_size() in vzalloc()	2018-06-12 16:19:22 -07:00
kexec_internal.h
kmod.c
kprobes.c	kprobes: Replace %p with other pointer types	2018-06-21 17:33:42 +02:00
ksysfs.c
kthread.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 11:25:07 -07:00
latencytop.c
Makefile	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
memremap.c	kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN	2018-08-17 16:20:30 -07:00
module-internal.h
module.c	module: replace the existing LSM hook in init_module	2018-07-16 12:31:57 -07:00
module_signing.c
notifier.c
nsproxy.c
padata.c	padata: add SPDX identifier	2018-01-05 18:43:00 +11:00
panic.c	Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables	2018-06-14 12:21:18 +09:00
params.c	kernel/params.c: downgrade warning for unsafe parameters	2018-04-11 10:28:37 -07:00
pid.c	xarray: add the xa_lock to the radix_tree_root	2018-04-11 10:28:39 -07:00
pid_namespace.c	Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-04-03 19:15:32 -07:00
profile.c
ptrace.c	pids: introduce find_get_task_by_vpid() helper	2018-02-06 18:32:46 -08:00
range.c
reboot.c	PM / reboot: Eliminate race between reboot and suspend	2018-08-06 12:35:20 +02:00
relay.c	kernel/relay.c: change return type to vm_fault_t	2018-06-15 07:55:24 +09:00
resource.c	libnvdimm for 4.18	2018-06-08 17:21:52 -07:00
rseq.c	rseq: uapi: Declare rseq_cs field as union, update includes	2018-07-10 22:18:52 +02:00
seccomp.c	audit/stable-4.18 PR 20180605	2018-06-06 16:34:00 -07:00
signal.c	signal: Remove no longer required irqsave/restore	2018-06-10 06:14:01 +02:00
smp.c	cpu/hotplug: Fix SMT supported evaluation	2018-08-07 12:25:30 +02:00
smpboot.c	smpboot: Remove cpumask from the API	2018-07-03 09:20:44 +02:00
smpboot.h
softirq.c	nohz: Fix missing tick reprogram when interrupting an inline softirq	2018-08-03 15:52:10 +02:00
stacktrace.c
stop_machine.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-13 11:25:07 -07:00
sys.c	sysinfo: Remove get_monotonic_boottime()	2018-06-19 09:56:27 +02:00
sys_ni.c	Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-10 10:17:09 -07:00
sysctl.c	sched/sysctl: Remove unused sched_time_avg_ms sysctl	2018-07-16 00:16:29 +02:00
sysctl_binary.c	staging: irda: remove remaining remants of irda code removal	2018-04-16 11:26:49 +02:00
task_work.c
taskstats.c	pids: introduce find_get_task_by_vpid() helper	2018-02-06 18:32:46 -08:00
test_kprobes.c	kprobes: Remove jprobe API implementation	2018-06-21 12:33:05 +02:00
torture.c	torture: Keep old-school dmesg format	2018-06-25 11:30:10 -07:00
tracepoint.c	tracepoints: Fix the descriptions of tracepoint_probe_register{_prio}	2018-05-28 12:49:51 -04:00
tsacct.c
ucount.c	headers: untangle kmemleak.h from mm.h	2018-04-05 21:36:27 -07:00
uid16.c	fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers	2018-04-02 20:15:59 +02:00
uid16.h	kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c	2018-04-02 20:15:30 +02:00
umh.c	umh: fix race condition	2018-06-07 16:56:28 -04:00
up.c
user-return-notifier.c
user.c	efivarfs: Limit the rate for non-root to read files	2018-02-22 10:21:02 -08:00
user_namespace.c	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
utsname.c	uts: create "struct uts_namespace" from kmem_cache	2018-04-11 10:28:35 -07:00
utsname_sysctl.c
watchdog.c	watchdog/softlockup: Fix cpu_stop_queue_work() double-queue bug	2018-07-15 23:51:19 +02:00
watchdog_hld.c	watchdog: Reduce message verbosity	2018-08-03 12:19:08 +02:00
workqueue.c	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
workqueue_internal.h	workqueue: Set worker->desc to workqueue name by default	2018-05-18 08:47:13 -07:00