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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-09-22 09:58:52 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-22 22:13:34 +0200 |
| commit | a7b3474cbb2864d5500d5e4f48dd57c903975cab (patch) | |
| tree | 51faaf4fae8f85c76632c12da92b4fe247c457f7 /arch/x86/include/asm/idtentry.h | |
| parent | 98477740630f270aecf648f1d6a9dbc6027d4ff1 (diff) | |
| download | linux-stable-a7b3474cbb2864d5500d5e4f48dd57c903975cab.tar.gz linux-stable-a7b3474cbb2864d5500d5e4f48dd57c903975cab.tar.bz2 linux-stable-a7b3474cbb2864d5500d5e4f48dd57c903975cab.zip | |
x86/irq: Make run_on_irqstack_cond() typesafe
Sami reported that run_on_irqstack_cond() requires the caller to cast
functions to mismatching types, which trips indirect call Control-Flow
Integrity (CFI) in Clang.
Instead of disabling CFI on that function, provide proper helpers for
the three call variants. The actual ASM code stays the same as that is
out of reach.
[ bp: Fix __run_on_irqstack() prototype to match. ]
Fixes: 931b94145981 ("x86/entry: Provide helpers for executing on the irqstack")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Reported-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Cc: <stable@vger.kernel.org>
Link: https://github.com/ClangBuiltLinux/linux/issues/1052
Link: https://lkml.kernel.org/r/87pn6eb5tv.fsf@nanos.tec.linutronix.de
Diffstat (limited to 'arch/x86/include/asm/idtentry.h')
| -rw-r--r-- | arch/x86/include/asm/idtentry.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index a43366191212..a0638640f1ed 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -242,7 +242,7 @@ __visible noinstr void func(struct pt_regs *regs) \ instrumentation_begin(); \ irq_enter_rcu(); \ kvm_set_cpu_l1tf_flush_l1d(); \ - run_on_irqstack_cond(__##func, regs, regs); \ + run_sysvec_on_irqstack_cond(__##func, regs); \ irq_exit_rcu(); \ instrumentation_end(); \ irqentry_exit(regs, state); \ |