linux

iv/linux

History

Thomas Gleixner a7b3474cbb 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

2020-09-22 22:13:34 +02:00

syscalls

all arch: remove system call sys_sysctl

2020-08-14 19:56:56 -07:00

vdso

xen: branch for v5.9-rc1b

2020-08-14 13:34:37 -07:00

vsyscall

y2038: syscall implementation cleanups

2019-12-01 14:00:59 -08:00

calling.h

x86/entry/64: Do not use RDPID in paranoid entry to accomodate KVM