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Brian Geffon 1e78a243e1 PM: hibernate: Clean up sync_read handling in snapshot_write_next() 
commit d08970df1980476f27936e24d452550f3e9e92e1 upstream.

In snapshot_write_next(), sync_read is set and unset in three different
spots unnecessiarly. As a result there is a subtle bug where the first
page after the meta data has been loaded unconditionally sets sync_read
to 0. If this first PFN was actually a highmem page, then the returned
buffer will be the global "buffer," and the page needs to be loaded
synchronously.

That is, I'm not sure we can always assume the following to be safe:

	handle->buffer = get_buffer(&orig_bm, &ca);
	handle->sync_read = 0;

Because get_buffer() can call get_highmem_page_buffer() which can
return 'buffer'.

The easiest way to address this is just set sync_read before
snapshot_write_next() returns if handle->buffer == buffer.

Signed-off-by: Brian Geffon <bgeffon@google.com>
Fixes: 8357376d3d ("[PATCH] swsusp: Improve handling of highmem")
Cc: All applicable <stable@vger.kernel.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-11-28 16:46:34 +00:00
..
bpf bpf: Address KCSAN report on bpf_lru_list 2023-08-11 11:45:25 +02:00
cgroup cgroup: Remove duplicates in cgroup v1 tasks file 2023-10-25 11:16:34 +02:00
configs
debug kdb: Make memory allocations more robust 2021-03-04 09:39:31 +01:00
dma treewide: Remove uninitialized_var() usage 2023-08-11 11:45:01 +02:00
events perf/core: Bail out early if the request AUX area is out of bound 2023-11-28 16:46:30 +00:00
gcov gcov: add support for checksum field 2023-01-18 11:30:39 +01:00
irq genirq/generic_chip: Make irq_remove_generic_chip() irqdomain aware 2023-11-28 16:46:34 +00:00
livepatch livepatch: fix race between fork and KLP transition 2022-10-26 13:19:23 +02:00
locking locking/ww_mutex/test: Fix potential workqueue corruption 2023-11-28 16:46:30 +00:00
power PM: hibernate: Clean up sync_read handling in snapshot_write_next() 2023-11-28 16:46:34 +00:00
printk printk: fix return value of printk.devkmsg __setup handler 2022-04-15 14:14:45 +02:00
rcu rcu: Suppress smp_processor_id() complaint in synchronize_rcu_expedited_wait() 2023-03-11 16:31:45 +01:00
sched sched,idle,rcu: Push rcu_idle deeper into the idle path 2023-10-25 11:16:26 +02:00
time posix-timers: Ensure timer ID search-loop limit is valid 2023-08-11 11:45:25 +02:00
trace tracing: relax trace_event_eval_update() execution with cond_resched() 2023-10-25 11:16:55 +02:00
.gitignore
acct.c acct: fix potential integer overflow in encode_comp_t() 2023-01-18 11:30:34 +01:00
async.c treewide: Remove uninitialized_var() usage 2023-08-11 11:45:01 +02:00
audit.c treewide: Remove uninitialized_var() usage 2023-08-11 11:45:01 +02:00
audit.h audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
audit_fsnotify.c audit: fix potential double free on error path from fsnotify_add_inode_mark 2022-09-05 10:26:28 +02:00
audit_tree.c audit: Embed key into chunk 2019-12-13 08:51:11 +01:00
audit_watch.c audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare() 2023-11-28 16:46:34 +00:00
auditfilter.c audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
auditsc.c audit: fix possible soft lockup in __audit_inode_child() 2023-09-23 10:48:04 +02:00
backtracetest.c
bounds.c kbuild: fix kernel/bounds.c 'W=1' warning 2018-11-13 11:08:47 -08:00
capability.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
compat.c sched_getaffinity: don't assume 'cpumask_size()' is fully initialized 2023-04-05 11:15:39 +02:00
configs.c
context_tracking.c
cpu.c random: clear fast pool, crng, and batches in cpuhp bring up 2022-06-25 11:49:07 +02:00
cpu_pm.c kernel/cpu_pm: Fix uninitted local in cpu_pm 2020-06-22 09:05:28 +02:00
crash_core.c kernel/crash_core.c: print timestamp using time64_t 2018-08-22 10:52:47 -07:00
crash_dump.c
cred.c memcg: account security cred as well to kmemcg 2020-01-09 10:19:00 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c treewide: Remove uninitialized_var() usage 2023-08-11 11:45:01 +02:00
extable.c kernel/extable.c: use address-of operator on section symbols 2023-06-09 10:24:02 +02:00
fail_function.c fail_function: Remove a redundant mutex unlock 2020-11-24 13:27:23 +01:00
fork.c mm/hugetlb: initialize hugetlb_usage in mm_init 2021-09-22 11:48:09 +02:00
freezer.c
futex.c treewide: Remove uninitialized_var() usage 2023-08-11 11:45:01 +02:00
groups.c
hung_task.c kernel: hung_task.c: disable on suspend 2019-04-20 09:16:02 +02:00
iomem.c
irq_work.c irq_work: Do not raise an IPI when queueing work on the local CPU 2019-05-31 06:46:19 -07:00
jump_label.c locking/static_key: Fix false positive warnings on concurrent dec/inc 2021-03-04 09:39:30 +01:00
kallsyms.c kallsyms: Refactor kallsyms_show_value() to take cred 2020-07-16 08:17:26 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c kernel/kcov.c: mark write_comp_data() as notrace 2019-02-12 19:47:20 +01:00
kexec.c
kexec_core.c kexec: fix a memory leak in crash_shrink_memory() 2023-08-11 11:45:06 +02:00
kexec_file.c kexec: support purgatories with .text.hot sections 2023-06-21 15:39:57 +02:00
kexec_internal.h
kmod.c kmod: make request_module() return an error when autoloading is disabled 2020-04-17 10:48:52 +02:00
kprobes.c x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range 2023-03-11 16:31:51 +01:00
ksysfs.c
kthread.c kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync() 2021-07-11 12:49:31 +02:00
latencytop.c
Makefile elfcore: fix building with clang 2021-02-10 09:21:06 +01:00
memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-29 16:43:27 +01:00
module-internal.h
module.c modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules 2023-09-23 10:47:56 +02:00
module_signing.c
notifier.c x86/mm: split vmalloc_sync_all() 2020-03-25 08:06:13 +01:00
nsproxy.c
padata.c crypto: pcrypt - Fix hungtask for PADATA_RESET 2023-11-28 16:46:31 +00:00
panic.c exit: Use READ_ONCE() for all oops/warn limit reads 2023-02-06 07:49:46 +01:00
params.c
pid.c Fix failure path in alloc_pid() 2019-01-13 09:51:06 +01:00
pid_namespace.c memcg: enable accounting for pids in nested pid namespaces 2021-09-22 11:48:09 +02:00
profile.c profiling: fix shift too large makes kernel panic 2022-08-25 11:15:20 +02:00
ptrace.c ptrace: Reimplement PTRACE_KILL by always sending SIGKILL 2022-06-14 16:59:14 +02:00
range.c
reboot.c reboot: fix overflow parsing reboot cpu number 2020-11-18 19:18:52 +01:00
relay.c relayfs: fix out-of-bounds access in relay_file_read 2023-05-17 11:13:23 +02:00
resource.c resource: fix locking in find_next_iomem_res() 2019-09-16 08:22:20 +02:00
rseq.c
seccomp.c seccomp: Invalidate seccomp mode to catch death failures 2022-02-16 12:51:47 +01:00
signal.c signal handling: don't use BUG_ON() for debugging 2022-07-21 21:09:32 +02:00
smp.c smp: Fix offline cpu check in flush_smp_call_function_queue() 2022-04-20 09:12:50 +02:00
smpboot.c kthread: Extract KTHREAD_IS_PER_CPU 2021-02-07 14:48:38 +01:00
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys.c prlimit: do_prlimit needs to have a speculation check 2023-01-24 07:11:49 +01:00
sys_ni.c kernel/sys_ni: add compat entry for fadvise64_64 2022-09-05 10:26:28 +02:00
sysctl.c proc: proc_skip_spaces() shouldn't think it is working on C strings 2022-12-08 11:18:32 +01:00
sysctl_binary.c
task_work.c
taskstats.c taskstats: fix data-race 2020-01-09 10:18:59 +01:00
test_kprobes.c
torture.c
tracepoint.c tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing 2021-07-20 16:15:42 +02:00
tsacct.c taskstats: Cleanup the use of task->exit_code 2022-02-23 11:58:39 +01:00
ucount.c
uid16.c
uid16.h
umh.c usermodehelper: reset umask to default before executing user process 2020-10-14 10:31:21 +02:00
up.c smp: Fix smp_call_function_single_async prototype 2021-05-22 10:59:39 +02:00
user-return-notifier.c
user.c userns: use irqsave variant of refcount_dec_and_lock() 2018-08-22 10:52:47 -07:00
user_namespace.c userns: also map extents in the reverse map to kernel IDs 2018-11-13 11:09:00 -08:00
utsname.c
utsname_sysctl.c
watchdog.c watchdog: export lockup_detector_reconfigure 2022-08-25 11:15:46 +02:00
watchdog_hld.c watchdog/perf: more properly prevent false positives with turbo modes 2023-08-11 11:45:06 +02:00
workqueue.c workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask() 2023-10-25 11:16:26 +02:00
workqueue_internal.h