Kees Cook a25982f544 exit: Use READ_ONCE() for all oops/warn limit reads ...

commit 7535b832c6399b5ebfc5b53af5c51dd915ee2538 upstream.

Use a temporary variable to take full advantage of READ_ONCE() behavior.
Without this, the report (and even the test) might be out of sync with
the initial test.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/lkml/Y5x7GXeluFmZ8E0E@hirez.programming.kicks-ass.net
Fixes: 9fc9e278a5c0 ("panic: Introduce warn_limit")
Fixes: d4ccd54d28d3 ("exit: Put an upper limit on how often we can oops")
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Jann Horn <jannh@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: tangmeng <tangmeng@uniontech.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-02-06 07:49:46 +01:00

..

bpf

bpf: Fix pointer-leak due to insufficient speculative store bypass mitigation

2023-02-06 07:49:38 +01:00

cgroup

memcg: fix possible use-after-free in memcg_write_event_control()

2022-12-14 11:28:27 +01:00

configs

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debug

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dma

swiotlb: skip swiotlb_bounce when orig_addr is zero

2022-07-02 16:27:40 +02:00

events

perf: Fix possible memleak in pmu_dev_alloc()

2023-01-18 11:30:05 +01:00

gcov

gcov: add support for checksum field

2023-01-18 11:30:39 +01:00

irq

random: remove unused irq_flags argument from add_interrupt_randomness()

2022-06-25 11:49:01 +02:00

livepatch

livepatch: fix race between fork and KLP transition

2022-10-26 13:19:23 +02:00

locking

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power

PM: hibernate: Allow hybrid sleep to work with s2idle

2022-11-03 23:52:31 +09:00

printk

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rcu

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sched

panic: Consolidate open-coded panic_on_warn checks

2023-02-06 07:49:46 +01:00

time

timekeeping: Add raw clock fallback for random_get_entropy()

2022-06-25 11:49:10 +02:00

trace

trace_events_hist: add check for return value of 'create_hist_field'

2023-02-06 07:49:41 +01:00

.gitignore

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acct.c

acct: fix potential integer overflow in encode_comp_t()

2023-01-18 11:30:34 +01:00

async.c

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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

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audit_watch.c

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audit.c

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audit.h

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auditfilter.c

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auditsc.c

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backtracetest.c

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bounds.c

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capability.c

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compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

random: clear fast pool, crng, and batches in cpuhp bring up

2022-06-25 11:49:07 +02:00

crash_core.c

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crash_dump.c

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cred.c

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delayacct.c

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dma.c

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exec_domain.c

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exit.c

exit: Use READ_ONCE() for all oops/warn limit reads

2023-02-06 07:49:46 +01:00

extable.c

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fail_function.c

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fork.c

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freezer.c

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futex.c

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groups.c

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hung_task.c

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iomem.c

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irq_work.c

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jump_label.c

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kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

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kexec_core.c

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kexec_file.c

kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]

2022-07-02 16:27:39 +02:00

kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobe: reverse kp->flags when arm_kprobe failed

2022-11-10 17:46:54 +01:00

ksysfs.c

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kthread.c

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latencytop.c

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Makefile

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memremap.c

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module_signing.c

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module-internal.h

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module.c

module: Don't wait for GOING modules

2023-02-06 07:49:41 +01:00

notifier.c

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nsproxy.c

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padata.c

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panic.c

exit: Use READ_ONCE() for all oops/warn limit reads

2023-02-06 07:49:46 +01:00

params.c

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pid_namespace.c

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pid.c

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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

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reboot.c

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relay.c

relay: fix type mismatch when allocating memory in relay_create_buf()

2023-01-18 11:30:08 +01:00

resource.c

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rseq.c

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seccomp.c

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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

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smpboot.h

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softirq.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

kernel/sys_ni: add compat entry for fadvise64_64

2022-09-05 10:26:28 +02:00

sys.c

prlimit: do_prlimit needs to have a speculation check

2023-01-24 07:11:49 +01:00

sysctl_binary.c

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sysctl.c

proc: proc_skip_spaces() shouldn't think it is working on C strings

2022-12-08 11:18:32 +01:00

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

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umh.c

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up.c

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user_namespace.c

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user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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watchdog_hld.c

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watchdog.c

watchdog: export lockup_detector_reconfigure

2022-08-25 11:15:46 +02:00

workqueue_internal.h

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workqueue.c

workqueue: don't skip lockdep work dependency in cancel_work_sync()

2022-09-28 11:02:58 +02:00