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Message-ID: <20220908172319.175164e7@gandalf.local.home>
Date: Thu, 8 Sep 2022 17:23:19 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Alison Schofield <alison.schofield@...el.com>,
Brian Norris <briannorris@...omium.org>,
"Christian A. Ehrhardt" <lk@...e.de>,
Daniel Bristot de Oliveira <bristot@...nel.org>,
Lukas Bulwahn <lukas.bulwahn@...il.com>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
Xiu Jianfeng <xiujianfeng@...wei.com>,
Yipeng Zou <zouyipeng@...wei.com>
Subject: [GIT PULL] tracing: Fixes for 6.0
Linus,
Tracing fixes and updates for 6.0:
- Do not stop trace events in modules if TAINT_TEST is set
- Do not clobber mount options when tracefs is mounted a second time
- Prevent crash of kprobes in gate area
- Add static annotation to some non global functions
- Add some entries into the MAINTAINERS file
- Fix check of event_mutex held when accessing trigger list
- Add some __init/__exit annotations
- Fix reporting of what called hardirq_{enable,disable}_ip function
Please pull the latest trace-v6.0-rc4 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v6.0-rc4
Tag SHA1: 0520c4c3af80a4a8f3f8faf7c99b5e053017b470
Head SHA1: 47311db8e8f33011d90dee76b39c8886120cdda4
Alison Schofield (1):
tracepoint: Allow trace events in modules with TAINT_TEST
Brian Norris (1):
tracefs: Only clobber mode/uid/gid on remount if asked
Christian A. Ehrhardt (1):
kprobes: Prohibit probes in gate area
Daniel Bristot de Oliveira (2):
rv/monitors: Make monitor's automata definition static
MAINTAINERS: Add Runtime Verification (RV) entry
Lukas Bulwahn (1):
MAINTAINERS: add scripts/tracing/ to TRACING
Masami Hiramatsu (Google) (1):
tracing: Fix to check event_mutex is held while accessing trigger list
Xiu Jianfeng (1):
rv/reactor: add __init/__exit annotations to module init/exit funcs
Yipeng Zou (1):
tracing: hold caller_addr to hardirq_{enable,disable}_ip
----
MAINTAINERS | 12 ++++++++++++
fs/tracefs/inode.c | 31 +++++++++++++++++++++++--------
kernel/kprobes.c | 1 +
kernel/trace/rv/monitors/wip/wip.h | 2 +-
kernel/trace/rv/monitors/wwnr/wwnr.h | 2 +-
kernel/trace/rv/reactor_panic.c | 4 ++--
kernel/trace/rv/reactor_printk.c | 4 ++--
kernel/trace/trace_events_trigger.c | 3 ++-
kernel/trace/trace_preemptirq.c | 4 ++--
kernel/tracepoint.c | 5 +++--
10 files changed, 49 insertions(+), 19 deletions(-)
---------------------------
diff --git a/MAINTAINERS b/MAINTAINERS
index d30f26e07cd3..93ffebc3e6c0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17735,6 +17735,17 @@ L: linux-rdma@...r.kernel.org
S: Maintained
F: drivers/infiniband/ulp/rtrs/
+RUNTIME VERIFICATION (RV)
+M: Daniel Bristot de Oliveira <bristot@...nel.org>
+M: Steven Rostedt <rostedt@...dmis.org>
+L: linux-trace-devel@...r.kernel.org
+S: Maintained
+F: Documentation/trace/rv/
+F: include/linux/rv.h
+F: include/rv/
+F: kernel/trace/rv/
+F: tools/verification/
+
RXRPC SOCKETS (AF_RXRPC)
M: David Howells <dhowells@...hat.com>
M: Marc Dionne <marc.dionne@...istor.com>
@@ -20601,6 +20612,7 @@ F: include/*/ftrace.h
F: include/linux/trace*.h
F: include/trace/
F: kernel/trace/
+F: scripts/tracing/
F: tools/testing/selftests/ftrace/
TRACING MMIO ACCESSES (MMIOTRACE)
diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index 81d26abf486f..da85b3979195 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -141,6 +141,8 @@ struct tracefs_mount_opts {
kuid_t uid;
kgid_t gid;
umode_t mode;
+ /* Opt_* bitfield. */
+ unsigned int opts;
};
enum {
@@ -241,6 +243,7 @@ static int tracefs_parse_options(char *data, struct tracefs_mount_opts *opts)
kgid_t gid;
char *p;
+ opts->opts = 0;
opts->mode = TRACEFS_DEFAULT_MODE;
while ((p = strsep(&data, ",")) != NULL) {
@@ -275,24 +278,36 @@ static int tracefs_parse_options(char *data, struct tracefs_mount_opts *opts)
* but traditionally tracefs has ignored all mount options
*/
}
+
+ opts->opts |= BIT(token);
}
return 0;
}
-static int tracefs_apply_options(struct super_block *sb)
+static int tracefs_apply_options(struct super_block *sb, bool remount)
{
struct tracefs_fs_info *fsi = sb->s_fs_info;
struct inode *inode = d_inode(sb->s_root);
struct tracefs_mount_opts *opts = &fsi->mount_opts;
- inode->i_mode &= ~S_IALLUGO;
- inode->i_mode |= opts->mode;
+ /*
+ * On remount, only reset mode/uid/gid if they were provided as mount
+ * options.
+ */
+
+ if (!remount || opts->opts & BIT(Opt_mode)) {
+ inode->i_mode &= ~S_IALLUGO;
+ inode->i_mode |= opts->mode;
+ }
- inode->i_uid = opts->uid;
+ if (!remount || opts->opts & BIT(Opt_uid))
+ inode->i_uid = opts->uid;
- /* Set all the group ids to the mount option */
- set_gid(sb->s_root, opts->gid);
+ if (!remount || opts->opts & BIT(Opt_gid)) {
+ /* Set all the group ids to the mount option */
+ set_gid(sb->s_root, opts->gid);
+ }
return 0;
}
@@ -307,7 +322,7 @@ static int tracefs_remount(struct super_block *sb, int *flags, char *data)
if (err)
goto fail;
- tracefs_apply_options(sb);
+ tracefs_apply_options(sb, true);
fail:
return err;
@@ -359,7 +374,7 @@ static int trace_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &tracefs_super_operations;
- tracefs_apply_options(sb);
+ tracefs_apply_options(sb, false);
return 0;
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 08350e35aba2..ca9d834d0b84 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1562,6 +1562,7 @@ static int check_kprobe_address_safe(struct kprobe *p,
/* Ensure it is not in reserved area nor out of text */
if (!(core_kernel_text((unsigned long) p->addr) ||
is_module_text_address((unsigned long) p->addr)) ||
+ in_gate_area_no_mm((unsigned long) p->addr) ||
within_kprobe_blacklist((unsigned long) p->addr) ||
jump_label_text_reserved(p->addr, p->addr) ||
static_call_text_reserved(p->addr, p->addr) ||
diff --git a/kernel/trace/rv/monitors/wip/wip.h b/kernel/trace/rv/monitors/wip/wip.h
index c1c47e2305ef..dacc37b62a2c 100644
--- a/kernel/trace/rv/monitors/wip/wip.h
+++ b/kernel/trace/rv/monitors/wip/wip.h
@@ -27,7 +27,7 @@ struct automaton_wip {
bool final_states[state_max_wip];
};
-struct automaton_wip automaton_wip = {
+static struct automaton_wip automaton_wip = {
.state_names = {
"preemptive",
"non_preemptive"
diff --git a/kernel/trace/rv/monitors/wwnr/wwnr.h b/kernel/trace/rv/monitors/wwnr/wwnr.h
index d1afe55cdd4c..118e576b91b4 100644
--- a/kernel/trace/rv/monitors/wwnr/wwnr.h
+++ b/kernel/trace/rv/monitors/wwnr/wwnr.h
@@ -27,7 +27,7 @@ struct automaton_wwnr {
bool final_states[state_max_wwnr];
};
-struct automaton_wwnr automaton_wwnr = {
+static struct automaton_wwnr automaton_wwnr = {
.state_names = {
"not_running",
"running"
diff --git a/kernel/trace/rv/reactor_panic.c b/kernel/trace/rv/reactor_panic.c
index b698d05dd069..d65f6c25a87c 100644
--- a/kernel/trace/rv/reactor_panic.c
+++ b/kernel/trace/rv/reactor_panic.c
@@ -24,13 +24,13 @@ static struct rv_reactor rv_panic = {
.react = rv_panic_reaction
};
-static int register_react_panic(void)
+static int __init register_react_panic(void)
{
rv_register_reactor(&rv_panic);
return 0;
}
-static void unregister_react_panic(void)
+static void __exit unregister_react_panic(void)
{
rv_unregister_reactor(&rv_panic);
}
diff --git a/kernel/trace/rv/reactor_printk.c b/kernel/trace/rv/reactor_printk.c
index 31899f953af4..4b6b7106a477 100644
--- a/kernel/trace/rv/reactor_printk.c
+++ b/kernel/trace/rv/reactor_printk.c
@@ -23,13 +23,13 @@ static struct rv_reactor rv_printk = {
.react = rv_printk_reaction
};
-static int register_react_printk(void)
+static int __init register_react_printk(void)
{
rv_register_reactor(&rv_printk);
return 0;
}
-static void unregister_react_printk(void)
+static void __exit unregister_react_printk(void)
{
rv_unregister_reactor(&rv_printk);
}
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index cb866c3141af..918730d74932 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -142,7 +142,8 @@ static bool check_user_trigger(struct trace_event_file *file)
{
struct event_trigger_data *data;
- list_for_each_entry_rcu(data, &file->triggers, list) {
+ list_for_each_entry_rcu(data, &file->triggers, list,
+ lockdep_is_held(&event_mutex)) {
if (data->flags & EVENT_TRIGGER_FL_PROBE)
continue;
return true;
diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index 95b58bd757ce..1e130da1b742 100644
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -95,14 +95,14 @@ __visible void trace_hardirqs_on_caller(unsigned long caller_addr)
}
lockdep_hardirqs_on_prepare();
- lockdep_hardirqs_on(CALLER_ADDR0);
+ lockdep_hardirqs_on(caller_addr);
}
EXPORT_SYMBOL(trace_hardirqs_on_caller);
NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
{
- lockdep_hardirqs_off(CALLER_ADDR0);
+ lockdep_hardirqs_off(caller_addr);
if (!this_cpu_read(tracing_irq_cpu)) {
this_cpu_write(tracing_irq_cpu, 1);
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 64ea283f2f86..ef42c1a11920 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -571,7 +571,8 @@ static void for_each_tracepoint_range(
bool trace_module_has_bad_taint(struct module *mod)
{
return mod->taints & ~((1 << TAINT_OOT_MODULE) | (1 << TAINT_CRAP) |
- (1 << TAINT_UNSIGNED_MODULE));
+ (1 << TAINT_UNSIGNED_MODULE) |
+ (1 << TAINT_TEST));
}
static BLOCKING_NOTIFIER_HEAD(tracepoint_notify_list);
@@ -647,7 +648,7 @@ static int tracepoint_module_coming(struct module *mod)
/*
* We skip modules that taint the kernel, especially those with different
* module headers (for forced load), to make sure we don't cause a crash.
- * Staging, out-of-tree, and unsigned GPL modules are fine.
+ * Staging, out-of-tree, unsigned GPL, and test modules are fine.
*/
if (trace_module_has_bad_taint(mod))
return 0;
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