Matthew Wilcox 9557090582 fs: prevent page refcount overflow in pipe_buf_get ...

commit 15fab63e1e upstream.

Change pipe_buf_get() to return a bool indicating whether it succeeded
in raising the refcount of the page (if the thing in the pipe is a page).
This removes another mechanism for overflowing the page refcount.  All
callers converted to handle a failure.

Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 4.9: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-06-11 12:22:45 +02:00

..

bpf

bpf: convert htab map to hlist_nulls

2019-05-16 19:43:40 +02:00

configs

config: android: enable CONFIG_SECCOMP

2016-10-11 15:06:32 -07:00

debug

kdb: use memmove instead of overlapping memcpy

2018-12-08 13:05:05 +01:00

events

perf/core: Restore mmap record type correctly

2019-04-20 09:07:46 +02:00

gcov

gcov: support GCC 7.1

2017-09-02 07:07:53 +02:00

irq

genirq: Prevent use-after-free and work list corruption

2019-05-10 17:52:10 +02:00

livepatch

…

locking

locking/rwsem: Prevent decrement of reader count before increment

2019-05-21 18:48:55 +02:00

power

PM / sleep: wakeup: Fix build error caused by missing SRCU support

2018-09-09 20:01:23 +02:00

printk

printk: Fix panic caused by passing log_buf_len to command line

2018-11-13 11:17:01 -08:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:48:30 -07:00

sched

sched/core: Handle overflow in cpu_shares_write_u64

2019-05-31 06:48:22 -07:00

time

timer/debug: Change /proc/timer_stats from 0644 to 0600

2019-05-10 17:52:11 +02:00

trace

fs: prevent page refcount overflow in pipe_buf_get

2019-06-11 12:22:45 +02:00

.gitignore

…

acct.c

kernel/acct.c: fix the acct->needcheck check in check_free_space()

2018-01-10 09:29:51 +01:00

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-17 13:21:18 +01:00

audit_fsnotify.c

…

audit_tree.c

…

audit_watch.c

audit: fix use-after-free in audit_add_watch

2018-09-26 08:36:37 +02:00

audit.c

audit: return on memory error to avoid null pointer dereference

2018-05-30 07:50:49 +02:00

audit.h

…

auditfilter.c

audit: fix a memory leak bug

2019-05-31 06:48:20 -07:00

auditsc.c

audit: allow not equal op for audit by executable

2018-08-03 07:55:25 +02:00

backtracetest.c

…

bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:16:57 -08:00

capability.c

ptrace: Capture the ptracer's creds not PT_PTRACE_CAP

2017-01-06 10:40:13 +01:00

cgroup_freezer.c

…

cgroup_pids.c

cgroup/pids: remove spurious suspicious RCU usage warning

2017-03-26 13:05:58 +02:00

cgroup.c

cgroup: Fix deadlock in cpu hotplug path

2018-10-13 09:18:56 +02:00

compat.c

…

configs.c

…

context_tracking.c

…

cpu_pm.c

…

cpu.c

cpu/speculation: Add 'mitigations=' cmdline option

2019-05-14 19:19:41 +02:00

cpuset.c

sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs

2017-10-12 11:51:25 +02:00

crash_dump.c

…

cred.c

…

delayacct.c

…

dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

kernel/exit.c: release ptraced tasks before zap_pid_ns_processes

2019-02-06 17:33:29 +01:00

extable.c

kernel/extable.c: mark core_kernel_text notrace

2017-07-21 07:42:21 +02:00

fork.c

fork: record start_time late

2019-01-13 10:03:51 +01:00

freezer.c

…

futex_compat.c

…

futex.c

futex: Ensure that futex address is aligned in handle_futex_death()

2019-03-27 14:13:03 +09:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:07:52 +02:00

irq_work.c

…

jump_label.c

jump_label: Invoke jump_label_test() via early_initcall()

2017-12-14 09:28:24 +01:00

kallsyms.c

…

kcmp.c

…

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:55:12 +02:00

kexec_core.c

objtool, x86: Add several functions and files to the objtool whitelist

2018-06-05 10:28:57 +02:00

kexec_file.c

…

kexec_internal.h

…

kexec.c

…

kmod.c

…

kprobes.c

kprobes: Fix error check when reusing optimized probes

2019-04-27 09:34:45 +02:00

ksysfs.c

…

kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:55:12 +02:00

latencytop.c

…

Makefile

kernel/watchdog.c: move hardlockup detector to separate file

2017-06-17 06:41:57 +02:00

membarrier.c

Fix: Disable sys_membarrier when nohz_full is enabled

2017-03-12 06:41:45 +01:00

memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:03:51 +01:00

module_signing.c

…

module-internal.h

…

module.c

module: exclude SHN_UNDEF symbols from kallsyms api

2018-10-03 17:01:48 -07:00

notifier.c

…

nsproxy.c

…

padata.c

padata: free correct variable

2017-05-20 14:28:40 +02:00

panic.c

panic: avoid deadlocks in re-entrant console drivers

2018-12-29 13:40:16 +01:00

params.c

…

pid_namespace.c

pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes

2017-05-25 15:44:38 +02:00

pid.c

pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

2018-04-13 19:47:53 +02:00

profile.c

…

ptrace.c

x86/speculation: Apply IBPB more strictly to avoid cross-process data leak

2019-05-14 19:19:34 +02:00

range.c

…

reboot.c

…

relay.c

kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE

2018-05-30 07:50:29 +02:00

resource.c

resource: fix integer overflow at reallocation

2018-04-24 09:34:09 +02:00

seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 16:58:02 +02:00

signal.c

kernel/signal.c: trace_signal_deliver when signal_group_exit

2019-06-11 12:22:43 +02:00

smp.c

cpu/hotplug: Fix SMT supported evaluation

2018-08-15 18:14:53 +02:00

smpboot.c

kthread/smpboot: do not park in kthread_create_on_cpu()

2016-10-11 15:06:33 -07:00

smpboot.h

…

softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:14:42 +02:00

stacktrace.c

stacktrace, lockdep: Fix address, newline ugliness

2017-02-14 15:25:42 -08:00

stop_machine.c

stop_machine: Use raw spinlocks

2018-08-03 07:55:24 +02:00

sys_ni.c

…

sys.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

sysctl_binary.c

…

sysctl.c

kernel/sysctl.c: fix out-of-bounds access when setting file-max

2019-04-27 09:34:47 +02:00

task_work.c

…

taskstats.c

taskstats: fix the length of cgroupstats_cmd_get_policy

2016-11-03 16:55:58 -04:00

test_kprobes.c

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torture.c

…

tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:50:20 +02:00

tsacct.c

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ucount.c

kernel/ucount.c: mark user_header with kmemleak_ignore()

2017-06-17 06:41:51 +02:00

uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

up.c

…

user_namespace.c

userns: move user access out of the mutex

2018-09-09 20:01:24 +02:00

user-return-notifier.c

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user.c

…

utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

utsname.c

Merge branch 'nsfs-ioctls' into HEAD

2016-09-22 20:00:36 -05:00

watchdog_hld.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

watchdog.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

workqueue_internal.h

workqueue: Fix NULL pointer dereference

2017-11-15 15:53:17 +01:00

workqueue.c

workqueue: use put_device() instead of kfree()

2018-05-30 07:50:36 +02:00