user/sven/linux.git/include/linux/sched, branch v4.13.6

Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2017-07-19T15:55:18Z

Pull structure randomization updates from Kees Cook: "Now that IPC and other changes have landed, enable manual markings for randstruct plugin, including the task_struct. This is the rest of what was staged in -next for the gcc-plugins, and comes in three patches, largest first: - mark "easy" structs with __randomize_layout - mark task_struct with an optional anonymous struct to isolate the __randomize_layout section - mark structs to opt _out_ of automated marking (which will come later) And, FWIW, this continues to pass allmodconfig (normal and patched to enable gcc-plugins) builds of x86_64, i386, arm64, arm, powerpc, and s390 for me" * tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: randstruct: opt-out externally exposed function pointer structs task_struct: Allow randomized layout randstruct: Mark various structs for randomization

mm: make PR_SET_THP_DISABLE immediately active

2017-07-10T23:32:31Z

PR_SET_THP_DISABLE has a rather subtle semantic. It doesn't affect any existing mapping because it only updated mm->def_flags which is a template for new mappings. The mappings created after prctl(PR_SET_THP_DISABLE) have VM_NOHUGEPAGE flag set. This can be quite surprising for all those applications which do not do prctl(); fork() & exec() and want to control their own THP behavior. Another usecase when the immediate semantic of the prctl might be useful is a combination of pre- and post-copy migration of containers with CRIU. In this case CRIU populates a part of a memory region with data that was saved during the pre-copy stage. Afterwards, the region is registered with userfaultfd and CRIU expects to get page faults for the parts of the region that were not yet populated. However, khugepaged collapses the pages and the expected page faults do not occur. In more general case, the prctl(PR_SET_THP_DISABLE) could be used as a temporary mechanism for enabling/disabling THP process wide. Implementation wise, a new MMF_DISABLE_THP flag is added. This flag is tested when decision whether to use huge pages is taken either during page fault of at the time of THP collapse. It should be noted, that the new implementation makes PR_SET_THP_DISABLE master override to any per-VMA setting, which was not the case previously. Fixes: a0715cc22601 ("mm, thp: add VM_INIT_DEF_MASK and PRCTL_THP_DISABLE") Link: http://lkml.kernel.org/r/1496415802-30944-1-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Michal Hocko Signed-off-by: Mike Rapoport Cc: Vlastimil Babka Cc: Andrea Arcangeli Cc: Arnd Bergmann Cc: "Kirill A. Shutemov" Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-07-09T18:18:59Z

Pull timers fixlet from Thomas Gleixner: "Add Frederic Weisbecker as NOHZ/dyntick maintainer" [ And an unmentioned and unrelated typo fix in the same commit? Hmm.. ] * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: MAINTAINERS: Add Frederic Weisbecker as nohz/dyntics maintainer

Merge branch 'work.sys_wait' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-05T21:10:19Z

Pull wait syscall updates from Al Viro: "Consolidating sys_wait* and compat counterparts. Gets rid of set_fs()/double-copy mess, simplifies the whole thing (lifting the copyouts to the syscalls means less headache in the part that does actual work - fewer failure exits, to start with), gets rid of the overhead of field-by-field __put_user()" * 'work.sys_wait' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: osf_wait4: switch to kernel_wait4() waitid(): switch copyout of siginfo to unsafe_put_user() wait_task_zombie: consolidate info logics kill wait_noreap_copyout() lift getrusage() from wait_noreap_copyout() waitid(2): leave copyout of siginfo to syscall itself kernel_wait4()/kernel_waitid(): delay copying status to userland wait4(2)/waitid(2): separate copying rusage to userland move compat wait4 and waitid next to native variants

MAINTAINERS: Add Frederic Weisbecker as nohz/dyntics maintainer

2017-07-05T14:26:37Z

Frederic has been improving and maintaining the nohz/dynticks kernel features for years, so make his de facto maintainership official. Acked-by: Thomas Gleixner Acked-by: Frederic Weisbecker Cc: Linus Torvalds Cc: Peter Zijlstra Signed-off-by: Ingo Molnar

randstruct: Mark various structs for randomization

2017-06-30T19:00:51Z

This marks many critical kernel structures for randomization. These are structures that have been targeted in the past in security exploits, or contain functions pointers, pointers to function pointer tables, lists, workqueues, ref-counters, credentials, permissions, or are otherwise sensitive. This initial list was extracted from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on my understanding of the code. Changes or omissions from the original code are mine and don't reflect the original grsecurity/PaX code. Left out of this list is task_struct, which requires special handling and will be covered in a subsequent patch. Signed-off-by: Kees Cook

sched/loadavg: Generalize "_idle" naming to "_nohz"

2017-06-22T09:30:01Z

The loadavg naming code still assumes that nohz == idle whereas its code is actually handling well both nohz idle and nohz full. So lets fix the naming according to what the code actually does, to unconfuse the reader. Signed-off-by: Frederic Weisbecker Acked-by: Rik van Riel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1497838322-10913-2-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar

sched/core: Drop the unused try_get_task_struct() helper function

2017-06-20T10:48:37Z

This function was introduced by: 150593bf8693 ("sched/api: Introduce task_rcu_dereference() and try_get_task_struct()") ... to allow easier usage of task_rcu_dereference(), however no users were ever added. Drop the helper. Signed-off-by: Davidlohr Bueso Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: dave@stgolabs.net Link: http://lkml.kernel.org/r/20170615023730.22827-1-dave@stgolabs.net Signed-off-by: Ingo Molnar

osf_wait4: switch to kernel_wait4()

2017-05-21T17:16:26Z

... and sanitize copying rusage to userland Signed-off-by: Al Viro

sched/clock: Use late_initcall() instead of sched_init_smp()

2017-05-15T08:15:21Z

Core2 marks its TSC unstable in ACPI Processor Idle, which is probed after sched_init_smp(). Luckily it appears both acpi_processor and intel_idle (which has a similar check) are mandatory built-in. This means we can delay switching to stable until after these drivers have ran (if they were modules, this would be impossible). Delay the stable switch to late_initcall() to allow these drivers to mark TSC unstable and avoid difficult stable->unstable transitions. Reported-by: Lofstedt, Marta Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Rafael J . Wysocki Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar