From: Elvira Khabirova <lineprin...@altlinux.org>
Arch code should use tracehook_*() helpers as documented
in include/linux/tracehook.h,
ptrace_report_syscall() is not expected to be used outside that file.
Co-authored-by: Dmitry V. Levin <l...@altlinux.org>
Fixes: 5521eb4bca2d ("powerpc/ptrace: Add support for PTRACE_SYSEMU")
Signed-off-by: Elvira Khabirova <lineprin...@altlinux.org>
Signed-off-by: Dmitry V. Levin <l...@altlinux.org>
---
v3: add a descriptive comment
v2: explicitly ignore tracehook_report_syscall_entry() return code
arch/powerpc/kernel/ptrace.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index afb819f4ca68..e84220d91bbd 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -3266,7 +3266,12 @@ long do_syscall_trace_enter(struct pt_regs *regs)
user_exit();
if (test_thread_flag(TIF_SYSCALL_EMU)) {
- ptrace_report_syscall(regs);
+ /*
+ * A nonzero return code from tracehook_report_syscall_entry()
+ * tells us to prevent the syscall execution, but we are not
+ * going to execute it anyway.
+ */
+ (void) tracehook_report_syscall_entry(regs);
/*
* Returning -1 will skip the syscall execution. We want to
* avoid clobbering any register also, thus, not 'gotoing'
--
ldv
