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linux/kernel
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Matthew Wilcox c88a0aa7ac 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>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-04 09:15:18 +02:00
..
bpf
bpf: fix sanitation rewrite in case of non-pointers
2019-04-20 09:15:09 +02:00
cgroup
cgroup/pids: turn cgroup_subsys->free() into cgroup_subsys->release() to fix the accounting
2019-04-05 22:31:37 +02:00
configs
ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.
2017-08-22 18:43:23 -07:00
debug
kdb: Don't back trace on a cpu that didn't round up
2019-02-12 19:46:09 +01:00
events
perf/core: Restore mmap record type correctly
2019-04-20 09:14:59 +02:00
gcov
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq
genirq: Initialize request_mutex if CONFIG_SPARSE_IRQ=n
2019-04-17 08:37:53 +02:00
livepatch
livepatch: Validate module/old func name length
2018-09-09 19:55:58 +02:00
locking
Revert "locking/lockdep: Add debug_locks check in __lock_downgrade()"
2019-04-27 09:35:42 +02:00
power
PM / sleep: wakeup: Fix build error caused by missing SRCU support
2018-09-09 19:55:58 +02:00
printk
printk: Wake klogd when passing console_lock owner
2018-12-17 09:28:55 +01:00
rcu
rcu: Do RCU GP kthread self-wakeup from softirq and interrupt
2019-03-23 14:35:30 +01:00
sched
sched/deadline: Correctly handle active 0-lag timers
2019-05-02 09:40:32 +02:00
time
alarmtimer: Return correct remaining time
2019-04-17 08:37:52 +02:00
trace
fs: prevent page refcount overflow in pipe_buf_get
2019-05-04 09:15:18 +02:00
.gitignore
…
acct.c
kernel/acct.c: fix the acct->needcheck check in check_free_space()
2018-01-10 09:31:17 +01:00
async.c
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-16 20:23:05 +01:00
audit_fsnotify.c
Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-05-03 11:05:15 -07:00
audit_tree.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
audit_watch.c
audit: fix use-after-free in audit_add_watch
2018-09-26 08:38:09 +02:00
audit.c
audit: return on memory error to avoid null pointer dereference
2018-05-30 07:52:39 +02:00
audit.h
ipc: mqueue: Replace timespec with timespec64
2017-09-03 20:21:24 -04:00
auditfilter.c
audit: allow not equal op for audit by executable
2018-08-03 07:50:39 +02:00
auditsc.c
audit: fix potential null dereference 'context->module.name'
2018-08-06 16:20:49 +02:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-11-13 11:15:08 -08:00
capability.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat.c
compat: fix 4-byte infoleak via uninitialized struct field
2018-05-16 10:10:26 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM / CPU: replace raw_notifier with atomic_notifier
2017-07-31 13:09:49 +02:00
cpu.c
cpu/hotplug: Mute hotplug lockdep during init
2019-04-05 22:31:38 +02:00
crash_core.c
kdump: write correct address of mem_section into vmcoreinfo
2018-01-17 09:45:27 +01:00
crash_dump.c
…
cred.c
doc: ReSTify credentials.txt
2017-05-18 10:30:19 -06:00
delayacct.c
delayacct: Use raw_spinlocks
2018-08-03 07:50:38 +02:00
dma.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
elfcore.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exec_domain.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exit.c
cgroup/pids: turn cgroup_subsys->free() into cgroup_subsys->release() to fix the accounting
2019-04-05 22:31:37 +02:00
extable.c
extable: Enable RCU if it is not watching in kernel_text_address()
2017-09-23 16:50:20 -04:00
fork.c
fork: record start_time late
2019-01-13 10:01:02 +01:00
freezer.c
…
futex_compat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
futex.c
futex: Ensure that futex address is aligned in handle_futex_death()
2019-03-27 14:13:52 +09:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-20 10:10:18 +01:00
hung_task.c
kernel: hung_task.c: disable on suspend
2019-04-20 09:15:05 +02:00
irq_work.c
…
jump_label.c
sched/core: Fix cpu.max vs. cpuhotplug deadlock
2018-12-05 19:41:17 +01:00
kallsyms.c
kernel/kallsyms.c: replace all_var with IS_ENABLED(CONFIG_KALLSYMS_ALL)
2017-07-10 16:32:34 -07:00
kcmp.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: ensure irq code sees a valid area
2018-08-03 07:50:22 +02:00
kexec_core.c
x86/mm, kexec: Allow kexec to be used with SME
2017-07-18 11:38:04 +02:00
kexec_file.c
kexec_file: adjust declaration of kexec_purgatory
2017-07-12 16:26:02 -07:00
kexec_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kexec.c
kdump: protect vmcoreinfo data under the crash memory
2017-07-12 16:26:00 -07:00
kmod.c
kmod: move #ifdef CONFIG_MODULES wrapper to Makefile
2017-09-08 18:26:51 -07:00
kprobes.c
kprobes: Fix error check when reusing optimized probes
2019-04-27 09:35:38 +02:00
ksysfs.c
kexec: move vmcoreinfo out of the kernel's .bss section
2017-07-12 16:25:59 -07:00
kthread.c
kthread, tracing: Don't expose half-written comm when creating kthreads
2018-08-03 07:50:21 +02:00
latencytop.c
…
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
memremap.c
mm, devm_memremap_pages: kill mapping "System RAM" support
2019-01-13 10:01:02 +01:00
module_signing.c
…
module-internal.h
…
module.c
kobject: return error code if writing /sys/.../uevent fails
2019-02-12 19:46:02 +01:00
notifier.c
…
nsproxy.c
…
padata.c
padata: Avoid nested calls to cpus_read_lock() in pcrypt_init_padata()
2017-05-26 10:10:37 +02:00
panic.c
panic: avoid deadlocks in re-entrant console drivers
2018-12-29 13:39:10 +01:00
params.c
kernel/params.c: improve STANDARD_PARAM_DEF readability
2017-10-03 17:54:26 -07:00
pid_namespace.c
userns,pidns: Verify the userns for new pid namespaces
2017-07-20 07:43:58 -05:00
pid.c
pids: make task_tgid_nr_ns() safe
2017-08-21 12:47:31 -07:00
profile.c
…
ptrace.c
ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS
2018-12-05 19:41:21 +01:00
range.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
reboot.c
…
relay.c
relay: check return of create_buf_file() properly
2019-03-13 14:03:20 -07:00
resource.c
resource: fix integer overflow at reallocation
2018-04-24 09:36:22 +02:00
seccomp.c
seccomp: Move speculation migitation control to arch code
2018-05-22 18:54:04 +02:00
signal.c
signal: Restore the stop PTRACE_EVENT_EXIT
2019-02-20 10:20:54 +01:00
smp.c
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
2019-02-12 19:46:13 +01:00
smpboot.c
watchdog/core, powerpc: Lock cpus across reconfiguration
2017-10-04 10:53:54 +02:00
smpboot.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
softirq.c
Mark HI and TASKLET softirq synchronous
2018-08-15 18:12:47 +02:00
stacktrace.c
…
stop_machine.c
stop_machine: Atomically queue and wake stopper threads
2018-09-05 09:26:36 +02:00
sys_ni.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sys.c
sys: don't hold uts_sem while accessing userspace memory
2018-09-09 19:56:00 +02:00
sysctl_binary.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sysctl.c
kernel/sysctl.c: fix out-of-bounds access when setting file-max
2019-04-27 09:35:42 +02:00
task_work.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-25 14:26:21 +01:00
taskstats.c
taskstats: add e/u/stime for TGID command
2017-05-08 17:15:12 -07:00
test_kprobes.c
…
torture.c
torture: Fix typo suppressing CPU-hotplug statistics
2017-07-25 13:04:45 -07:00
tracepoint.c
tracepoint: Do not warn on ENOMEM
2018-05-09 09:51:50 +02:00
tsacct.c
…
ucount.c
…
uid16.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-20 10:10:18 +01:00
umh.c
kmod: split out umh code into its own file
2017-09-08 18:26:50 -07:00
up.c
smp: Avoid using two cache lines for struct call_single_data
2017-08-29 15:14:38 +02:00
user_namespace.c
userns: move user access out of the mutex
2018-09-09 19:56:00 +02:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-09-09 19:56:00 +02:00
utsname.c
…
watchdog_hld.c
watchdog: Mark watchdog touch functions as notrace
2018-09-05 09:26:42 +02:00
watchdog.c
watchdog: Mark watchdog touch functions as notrace
2018-09-05 09:26:42 +02:00
workqueue_internal.h
Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2017-11-06 12:26:49 -08:00
workqueue.c
watchdog: Mark watchdog touch functions as notrace
2018-09-05 09:26:42 +02:00