Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-12-28 16:56:26 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

parisc/ftrace: Fix function graph tracing disablement

Browse Source 
Due to an apparent copy-paste bug, the parisc implementation of
ftrace_disable_ftrace_graph_caller() doesn't actually do anything.
It enables the (already-enabled) static key rather than disabling it.

The result is that after function graph tracing has been "disabled", any
subsequent (non-graph) function tracing will inadvertently also enable
the slow fgraph return address hijacking.

Fixes: 98f2926171 ("parisc/ftrace: use static key to enable/disable function graph tracer")
Cc: stable@vger.kernel.org # 5.16+
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Josh Poimboeuf 2024-10-02 14:32:04 -07:00 committed by Helge Deller
parent 2d5404caa8
commit a5f05a138a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/parisc/kernel/ftrace.c
View File

@ -87,7 +87,7 @@ int ftrace_enable_ftrace_graph_caller(void)
int ftrace_disable_ftrace_graph_caller(void)
{
static_key_enable(&ftrace_graph_enable.key);
static_key_disable(&ftrace_graph_enable.key);
return 0;
}
#endif