diff options
| author | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 09:55:01 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 11:08:21 -0400 |
| commit | 4617721c502b2ddaa4e324e86da4997edf738fa5 (patch) | |
| tree | 350aa83b47da0b574a814795392b20b0bed83cbc /include/sound/sof/xtensa.h | |
| download | linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.tar.gz linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.zip | |
ftrace: Synchronize the initialization of ftrace_opsgrafted
There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.
Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/sound/sof/xtensa.h')
| -rw-r--r-- | include/sound/sof/xtensa.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/sound/sof/xtensa.h b/include/sound/sof/xtensa.h new file mode 100644 index 000000000..ef70f8e26 --- /dev/null +++ b/include/sound/sof/xtensa.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * Copyright(c) 2018 Intel Corporation + */ + +#ifndef __INCLUDE_SOUND_SOF_XTENSA_H__ +#define __INCLUDE_SOUND_SOF_XTENSA_H__ + +#include <sound/sof/header.h> + +/* + * Architecture specific debug + */ + +/* Xtensa Firmware Oops data */ +struct sof_ipc_dsp_oops_xtensa { + struct sof_ipc_dsp_oops_arch_hdr arch_hdr; + struct sof_ipc_dsp_oops_plat_hdr plat_hdr; + uint32_t exccause; + uint32_t excvaddr; + uint32_t ps; + uint32_t epc1; + uint32_t epc2; + uint32_t epc3; + uint32_t epc4; + uint32_t epc5; + uint32_t epc6; + uint32_t epc7; + uint32_t eps2; + uint32_t eps3; + uint32_t eps4; + uint32_t eps5; + uint32_t eps6; + uint32_t eps7; + uint32_t depc; + uint32_t intenable; + uint32_t interrupt; + uint32_t sar; + uint32_t debugcause; + uint32_t windowbase; + uint32_t windowstart; + uint32_t excsave1; + uint32_t ar[]; +} __packed; + +#endif |