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| author | Will Deacon <will@kernel.org> | 2020-05-28 19:03:40 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-05-28 19:03:40 +0200 |
| commit | 082af5ec5080b028f7d0846a6c27cbb87f288205 (patch) | |
| tree | 9b34b36586c9453628849fc5acee655012cb7b1e /kernel/sched/core.c | |
| parent | Merge branch 'for-next/kvm/errata' into for-next/core (diff) | |
| parent | arm64: entry-ftrace.S: Update comment to indicate that x18 is live (diff) | |
| download | linux-082af5ec5080b028f7d0846a6c27cbb87f288205.tar.xz linux-082af5ec5080b028f7d0846a6c27cbb87f288205.zip | |
Merge branch 'for-next/scs' into for-next/core
Support for Clang's Shadow Call Stack in the kernel
(Sami Tolvanen and Will Deacon)
* for-next/scs:
arm64: entry-ftrace.S: Update comment to indicate that x18 is live
scs: Move DEFINE_SCS macro into core code
scs: Remove references to asm/scs.h from core code
scs: Move scs_overflow_check() out of architecture code
arm64: scs: Use 'scs_sp' register alias for x18
scs: Move accounting into alloc/free functions
arm64: scs: Store absolute SCS stack pointer value in thread_info
efi/libstub: Disable Shadow Call Stack
arm64: scs: Add shadow stacks for SDEI
arm64: Implement Shadow Call Stack
arm64: Disable SCS for hypervisor code
arm64: vdso: Disable Shadow Call Stack
arm64: efi: Restore register x18 if it was corrupted
arm64: Preserve register x18 when CPU is suspended
arm64: Reserve register x18 from general allocation with SCS
scs: Disable when function graph tracing is enabled
scs: Add support for stack usage debugging
scs: Add page accounting for shadow call stack allocations
scs: Add support for Clang's Shadow Call Stack (SCS)
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 9a2fbf98fd6f..a1d815a11b90 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -11,6 +11,7 @@ #include <linux/nospec.h> #include <linux/kcov.h> +#include <linux/scs.h> #include <asm/switch_to.h> #include <asm/tlb.h> @@ -3877,6 +3878,9 @@ static inline void schedule_debug(struct task_struct *prev, bool preempt) #ifdef CONFIG_SCHED_STACK_END_CHECK if (task_stack_end_corrupted(prev)) panic("corrupted stack end detected inside scheduler\n"); + + if (task_scs_end_corrupted(prev)) + panic("corrupted shadow stack detected inside scheduler\n"); #endif #ifdef CONFIG_DEBUG_ATOMIC_SLEEP @@ -6040,6 +6044,7 @@ void init_idle(struct task_struct *idle, int cpu) idle->se.exec_start = sched_clock(); idle->flags |= PF_IDLE; + scs_task_reset(idle); kasan_unpoison_task_stack(idle); #ifdef CONFIG_SMP |