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Filename Latest commit message Latest commit date
Jann Horn 2e256dd5b0 exit: Move preemption fixup up, move blocking operations down
[ Upstream commit 586b58cac8b4683eb58a1446fbc399de18974e40 ]

With CONFIG_DEBUG_ATOMIC_SLEEP=y and CONFIG_CGROUPS=y, kernel oopses in
non-preemptible context look untidy; after the main oops, the kernel prints
a "sleeping function called from invalid context" report because
exit_signals() -> cgroup_threadgroup_change_begin() -> percpu_down_read()
can sleep, and that happens before the preempt_count_set(PREEMPT_ENABLED)
fixup.

It looks like the same thing applies to profile_task_exit() and
kcov_task_exit().

Fix it by moving the preemption fixup up and the calls to
profile_task_exit() and kcov_task_exit() down.

Fixes: 1dc0fffc48 ("sched/core: Robustify preemption leak checks")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200305220657.46800-1-jannh@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-22 09:31:01 +02:00
arch MIPS: Make sparse_init() using top-down allocation 2020-06-22 09:30:59 +02:00
block block: reset mapping if failed to update hardware queue count 2020-06-22 09:30:53 +02:00
certs
crypto crypto: drbg - fix error return code in drbg_alloc_state() 2020-06-17 16:40:31 +02:00
Documentation dt-bindings: display: mediatek: control dpi pins mode to avoid leakage 2020-06-22 09:30:58 +02:00
drivers net: bcmgenet: Fix WoL with password after deep sleep 2020-06-22 09:31:00 +02:00
fs btrfs: do not ignore error from btrfs_next_leaf() when inserting checksums 2020-06-22 09:30:55 +02:00
include x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit 2020-06-22 09:30:57 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel exit: Move preemption fixup up, move blocking operations down 2020-06-22 09:31:01 +02:00
lib lib/mpi: Fix 64-bit MIPS build with Clang 2020-06-22 09:31:00 +02:00
LICENSES
mm mm/slub: fix a memory leak in sysfs_slab_add() 2020-06-17 16:40:36 +02:00
net netfilter: nft_nat: return EOPNOTSUPP if type or flags are not supported 2020-06-22 09:31:00 +02:00
samples samples: bpf: Fix build error 2020-06-03 08:21:15 +02:00
scripts bpf: Support llvm-objcopy for vmlinux BTF 2020-06-17 16:40:20 +02:00
security lockdown: Allow unprivileged users to see lockdown status 2020-06-22 09:30:53 +02:00
sound ALSA: usb-audio: Add vendor, product and profile name for HP Thunderbolt Dock 2020-06-17 16:40:28 +02:00
tools selftests/bpf: Fix memory leak in extract_build_id() 2020-06-22 09:31:00 +02:00
usr
virt KVM: arm64: Save the host's PtrAuth keys in non-preemptible context 2020-06-17 16:40:38 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.47 2020-06-17 16:40:38 +02:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.