Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 05589a3..36fb3bb 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Tracing hooks
*
* Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
*
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- *
* This file defines hook entry points called by core code where
* user tracing/debugging support might need to do something. These
* entry points are called tracehook_*(). Each hook declared below
@@ -57,13 +54,15 @@
/*
* ptrace report for syscall entry and exit looks identical.
*/
-static inline int ptrace_report_syscall(struct pt_regs *regs)
+static inline int ptrace_report_syscall(struct pt_regs *regs,
+ unsigned long message)
{
int ptrace = current->ptrace;
if (!(ptrace & PT_PTRACED))
return 0;
+ current->ptrace_message = message;
ptrace_notify(SIGTRAP | ((ptrace & PT_TRACESYSGOOD) ? 0x80 : 0));
/*
@@ -76,6 +75,7 @@
current->exit_code = 0;
}
+ current->ptrace_message = 0;
return fatal_signal_pending(current);
}
@@ -83,8 +83,8 @@
* tracehook_report_syscall_entry - task is about to attempt a system call
* @regs: user register state of current task
*
- * This will be called if %TIF_SYSCALL_TRACE has been set, when the
- * current task has just entered the kernel for a system call.
+ * This will be called if %TIF_SYSCALL_TRACE or %TIF_SYSCALL_EMU have been set,
+ * when the current task has just entered the kernel for a system call.
* Full user register state is available here. Changing the values
* in @regs can affect the system call number and arguments to be tried.
* It is safe to block here, preventing the system call from beginning.
@@ -101,7 +101,7 @@
static inline __must_check int tracehook_report_syscall_entry(
struct pt_regs *regs)
{
- return ptrace_report_syscall(regs);
+ return ptrace_report_syscall(regs, PTRACE_EVENTMSG_SYSCALL_ENTRY);
}
/**
@@ -123,15 +123,10 @@
*/
static inline void tracehook_report_syscall_exit(struct pt_regs *regs, int step)
{
- if (step) {
- siginfo_t info;
- clear_siginfo(&info);
- user_single_step_siginfo(current, regs, &info);
- force_sig_info(SIGTRAP, &info, current);
- return;
- }
-
- ptrace_report_syscall(regs);
+ if (step)
+ user_single_step_report(regs);
+ else
+ ptrace_report_syscall(regs, PTRACE_EVENTMSG_SYSCALL_EXIT);
}
/**
@@ -192,6 +187,13 @@
if (unlikely(current->task_works))
task_work_run();
+#ifdef CONFIG_KEYS_REQUEST_CACHE
+ if (unlikely(current->cached_requested_key)) {
+ key_put(current->cached_requested_key);
+ current->cached_requested_key = NULL;
+ }
+#endif
+
mem_cgroup_handle_over_high();
blkcg_maybe_throttle_current();
}