[PATCH 02/14] prctl.2: Add health warning
From: Dave Martin <Dave.Martin@arm.com>
Date: 2020-05-12 16:38:05
Also in:
linux-arch, linux-man
Subsystem:
the rest · Maintainer:
Linus Torvalds
In reality, almost every prctl interferes with assumptions that the compiler and C library / runtime rely on. prctl() can therefore make userspace explode in a variety ways that are likely to be hard to debug. This is not obvious to the uninitiated, so add a warning. Signed-off-by: Dave Martin <Dave.Martin@arm.com> --- man2/prctl.2 | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/man2/prctl.2 b/man2/prctl.2
index 7932ada..a35b748 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2@@ -66,6 +66,11 @@ prctl \- operations on a process or thread manipulates various aspects of the behavior of the calling thread or process. .PP +Note that careless use of +.BR prctl () +can confuse the userspace run-time environment, +so these operations should be used with care (if at all). +.PP .BR prctl () is called with a first argument describing what to do (with values defined in \fI<linux/prctl.h>\fP), and further
--
2.1.4
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