[PATCH 4.14 v2 00/15] Backport oops_limit to 4.14

Eric Biggers
2023-02-03T00:35:44Z

This series backports the patchset
"exit: Put an upper limit on how often we can oops"
(https://lore.kernel.org/linux-mm/20221117233838.give.484-kees@kernel.org/T/#u)
to 4.14, as recommended at
https://googleprojectzero.blogspot.com/2023/01/exploiting-null-dereferences-in-linux.html

Changed in v2:
- Fixed a build error in mm/kasan/report.c by dropping the patch "mm:
kasan: do not panic if both panic_on_warn and kasan_multishot set".

Eric W. Biederman (2):
exit: Add and use make_task_dead.
objtool: Add a missing comma to avoid string concatenation

Jann Horn (1):
exit: Put an upper limit on how often we can oops

Kees Cook (7):
exit: Expose "oops_count" to sysfs
exit: Allow oops_limit to be disabled
panic: Consolidate open-coded panic_on_warn checks
panic: Introduce warn_limit
panic: Expose "warn_count" to sysfs
docs: Fix path paste-o for /sys/kernel/warn_count
exit: Use READ_ONCE() for all oops/warn limit reads

Nathan Chancellor (2):
hexagon: Fix function name in die()
h8300: Fix build errors from do_exit() to make_task_dead() transition

Randy Dunlap (1):
ia64: make IA64_MCA_RECOVERY bool instead of tristate

Tiezhu Yang (1):
panic: unset panic_on_warn inside panic()

Xiaoming Ni (1):
sysctl: add a new register_sysctl_init() interface

.../ABI/testing/sysfs-kernel-oops_count | 6 ++
.../ABI/testing/sysfs-kernel-warn_count | 6 ++
Documentation/sysctl/kernel.txt | 20 +++++
arch/alpha/kernel/traps.c | 6 +-
arch/alpha/mm/fault.c | 2 +-
arch/arm/kernel/traps.c | 2 +-
arch/arm/mm/fault.c | 2 +-
arch/arm64/kernel/traps.c | 2 +-
arch/arm64/mm/fault.c | 2 +-
arch/h8300/kernel/traps.c | 3 +-
arch/h8300/mm/fault.c | 2 +-
arch/hexagon/kernel/traps.c | 2 +-
arch/ia64/Kconfig | 2 +-
arch/ia64/kernel/mca_drv.c | 2 +-
arch/ia64/kernel/traps.c | 2 +-
arch/ia64/mm/fault.c | 2 +-
arch/m68k/kernel/traps.c | 2 +-
arch/m68k/mm/fault.c | 2 +-
arch/microblaze/kernel/exceptions.c | 4 +-
arch/mips/kernel/traps.c | 2 +-
arch/nios2/kernel/traps.c | 4 +-
arch/openrisc/kernel/traps.c | 2 +-
arch/parisc/kernel/traps.c | 2 +-
arch/powerpc/kernel/traps.c | 2 +-
arch/s390/kernel/dumpstack.c | 2 +-
arch/s390/kernel/nmi.c | 2 +-
arch/sh/kernel/traps.c | 2 +-
arch/sparc/kernel/traps_32.c | 4 +-
arch/sparc/kernel/traps_64.c | 4 +-
arch/x86/entry/entry_32.S | 6 +-
arch/x86/entry/entry_64.S | 6 +-
arch/x86/kernel/dumpstack.c | 4 +-
arch/xtensa/kernel/traps.c | 2 +-
fs/proc/proc_sysctl.c | 33 ++++++++
include/linux/kernel.h | 1 +
include/linux/sched/task.h | 1 +
include/linux/sysctl.h | 3 +
kernel/exit.c | 72 ++++++++++++++++++
kernel/panic.c | 75 ++++++++++++++++---
kernel/sched/core.c | 3 +-
mm/kasan/report.c | 3 +-
tools/objtool/check.c | 3 +-
42 files changed, 251 insertions(+), 58 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-kernel-oops_count
create mode 100644 Documentation/ABI/testing/sysfs-kernel-warn_count

base-commit: 3949d16100044eeb6723eca03b1038b469fb9ae8
--
2.39.1