Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

No conflicts.

Adjacent changes:

drivers/net/ethernet/broadcom/bnxt/bnxt.h
  c948c0973df5 ("bnxt_en: Don't clear ntuple filters and rss contexts during ethtool ops")
  f2878cdeb754 ("bnxt_en: Add support to call FW to update a VNIC")

Link: https://patch.msgid.link/20240822210125.1542769-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

7 files changed, 29 insertions, 75 deletions

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1209ddaec026..b1fd2a3db91a 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2689,6 +2689,16 @@ int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval)
 	return ret;
 }
 
+/**
+ * Check if the core a CPU belongs to is online
+ */
+#if !defined(topology_is_core_online)
+static inline bool topology_is_core_online(unsigned int cpu)
+{
+	return true;
+}
+#endif
+
 int cpuhp_smt_enable(void)
 {
 	int cpu, ret = 0;
@@ -2699,7 +2709,7 @@ int cpuhp_smt_enable(void)
 		/* Skip online CPUs and CPUs on offline nodes */
 		if (cpu_online(cpu) || !node_online(cpu_to_node(cpu)))
 			continue;
-		if (!cpu_smt_thread_allowed(cpu))
+		if (!cpu_smt_thread_allowed(cpu) || !topology_is_core_online(cpu))
 			continue;
 		ret = _cpu_up(cpu, 0, CPUHP_ONLINE);
 		if (ret)
diff --git a/kernel/crash_reserve.c b/kernel/crash_reserve.c
index d3b4cd12bdd1..64d44a52c011 100644
--- a/kernel/crash_reserve.c
+++ b/kernel/crash_reserve.c
@@ -423,7 +423,8 @@ retry:
 		if (high && search_end == CRASH_ADDR_HIGH_MAX) {
 			search_end = CRASH_ADDR_LOW_MAX;
 			search_base = 0;
-			goto retry;
+			if (search_end != CRASH_ADDR_HIGH_MAX)
+				goto retry;
 		}
 		pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
 			crash_size);
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index fb2c77368d18..a9a0ca605d4a 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -160,38 +160,6 @@ unsigned long kallsyms_sym_address(int idx)
 	return kallsyms_relative_base - 1 - kallsyms_offsets[idx];
 }
 
-static void cleanup_symbol_name(char *s)
-{
-	char *res;
-
-	if (!IS_ENABLED(CONFIG_LTO_CLANG))
-		return;
-
-	/*
-	 * LLVM appends various suffixes for local functions and variables that
-	 * must be promoted to global scope as part of LTO.  This can break
-	 * hooking of static functions with kprobes. '.' is not a valid
-	 * character in an identifier in C. Suffixes only in LLVM LTO observed:
-	 * - foo.llvm.[0-9a-f]+
-	 */
-	res = strstr(s, ".llvm.");
-	if (res)
-		*res = '\0';
-
-	return;
-}
-
-static int compare_symbol_name(const char *name, char *namebuf)
-{
-	/* The kallsyms_seqs_of_names is sorted based on names after
-	 * cleanup_symbol_name() (see scripts/kallsyms.c) if clang lto is enabled.
-	 * To ensure correct bisection in kallsyms_lookup_names(), do
-	 * cleanup_symbol_name(namebuf) before comparing name and namebuf.
-	 */
-	cleanup_symbol_name(namebuf);
-	return strcmp(name, namebuf);
-}
-
 static unsigned int get_symbol_seq(int index)
 {
 	unsigned int i, seq = 0;
@@ -219,7 +187,7 @@ static int kallsyms_lookup_names(const char *name,
 		seq = get_symbol_seq(mid);
 		off = get_symbol_offset(seq);
 		kallsyms_expand_symbol(off, namebuf, ARRAY_SIZE(namebuf));
-		ret = compare_symbol_name(name, namebuf);
+		ret = strcmp(name, namebuf);
 		if (ret > 0)
 			low = mid + 1;
 		else if (ret < 0)
@@ -236,7 +204,7 @@ static int kallsyms_lookup_names(const char *name,
 		seq = get_symbol_seq(low - 1);
 		off = get_symbol_offset(seq);
 		kallsyms_expand_symbol(off, namebuf, ARRAY_SIZE(namebuf));
-		if (compare_symbol_name(name, namebuf))
+		if (strcmp(name, namebuf))
 			break;
 		low--;
 	}
@@ -248,7 +216,7 @@ static int kallsyms_lookup_names(const char *name,
 			seq = get_symbol_seq(high + 1);
 			off = get_symbol_offset(seq);
 			kallsyms_expand_symbol(off, namebuf, ARRAY_SIZE(namebuf));
-			if (compare_symbol_name(name, namebuf))
+			if (strcmp(name, namebuf))
 				break;
 			high++;
 		}
@@ -407,8 +375,7 @@ static int kallsyms_lookup_buildid(unsigned long addr,
 		if (modbuildid)
 			*modbuildid = NULL;
 
-		ret = strlen(namebuf);
-		goto found;
+		return strlen(namebuf);
 	}
 
 	/* See if it's in a module or a BPF JITed image. */
@@ -422,8 +389,6 @@ static int kallsyms_lookup_buildid(unsigned long addr,
 		ret = ftrace_mod_address_lookup(addr, symbolsize,
 						offset, modname, namebuf);
 
-found:
-	cleanup_symbol_name(namebuf);
 	return ret;
 }
 
@@ -450,8 +415,6 @@ const char *kallsyms_lookup(unsigned long addr,
 
 int lookup_symbol_name(unsigned long addr, char *symname)
 {
-	int res;
-
 	symname[0] = '\0';
 	symname[KSYM_NAME_LEN - 1] = '\0';
 
@@ -462,16 +425,10 @@ int lookup_symbol_name(unsigned long addr, char *symname)
 		/* Grab name */
 		kallsyms_expand_symbol(get_symbol_offset(pos),
 				       symname, KSYM_NAME_LEN);
-		goto found;
+		return 0;
 	}
 	/* See if it's in a module. */
-	res = lookup_module_symbol_name(addr, symname);
-	if (res)
-		return res;
-
-found:
-	cleanup_symbol_name(symname);
-	return 0;
+	return lookup_module_symbol_name(addr, symname);
 }
 
 /* Look up a kernel symbol and return it in a text buffer. */
diff --git a/kernel/kallsyms_selftest.c b/kernel/kallsyms_selftest.c
index 2f84896a7bcb..873f7c445488 100644
--- a/kernel/kallsyms_selftest.c
+++ b/kernel/kallsyms_selftest.c
@@ -187,31 +187,11 @@ static void test_perf_kallsyms_lookup_name(void)
 		stat.min, stat.max, div_u64(stat.sum, stat.real_cnt));
 }
 
-static bool match_cleanup_name(const char *s, const char *name)
-{
-	char *p;
-	int len;
-
-	if (!IS_ENABLED(CONFIG_LTO_CLANG))
-		return false;
-
-	p = strstr(s, ".llvm.");
-	if (!p)
-		return false;
-
-	len = strlen(name);
-	if (p - s != len)
-		return false;
-
-	return !strncmp(s, name, len);
-}
-
 static int find_symbol(void *data, const char *name, unsigned long addr)
 {
 	struct test_stat *stat = (struct test_stat *)data;
 
-	if (strcmp(name, stat->name) == 0 ||
-	    (!stat->perf && match_cleanup_name(name, stat->name))) {
+	if (!strcmp(name, stat->name)) {
 		stat->real_cnt++;
 		stat->addr = addr;
 
diff --git a/kernel/panic.c b/kernel/panic.c
index f861bedc1925..2a0449144f82 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -64,6 +64,8 @@ unsigned long panic_on_taint;
 bool panic_on_taint_nousertaint = false;
 static unsigned int warn_limit __read_mostly;
 
+bool panic_triggering_all_cpu_backtrace;
+
 int panic_timeout = CONFIG_PANIC_TIMEOUT;
 EXPORT_SYMBOL_GPL(panic_timeout);
 
@@ -253,8 +255,12 @@ void check_panic_on_warn(const char *origin)
  */
 static void panic_other_cpus_shutdown(bool crash_kexec)
 {
-	if (panic_print & PANIC_PRINT_ALL_CPU_BT)
+	if (panic_print & PANIC_PRINT_ALL_CPU_BT) {
+		/* Temporary allow non-panic CPUs to write their backtraces. */
+		panic_triggering_all_cpu_backtrace = true;
 		trigger_all_cpu_backtrace();
+		panic_triggering_all_cpu_backtrace = false;
+	}
 
 	/*
 	 * Note that smp_send_stop() is the usual SMP shutdown function,
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 054c0e7784fd..c22b07049c38 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2316,7 +2316,7 @@ asmlinkage int vprintk_emit(int facility, int level,
 	 * non-panic CPUs are generating any messages, they will be
 	 * silently dropped.
 	 */
-	if (other_cpu_in_panic())
+	if (other_cpu_in_panic() && !panic_triggering_all_cpu_backtrace)
 		return 0;
 
 	if (level == LOGLEVEL_SCHED) {
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 10cd38bce2f1..ebe7ce2f5f4a 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7956,7 +7956,7 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
 	trace_access_unlock(iter->cpu_file);
 
 	if (ret < 0) {
-		if (trace_empty(iter)) {
+		if (trace_empty(iter) && !iter->closed) {
 			if ((filp->f_flags & O_NONBLOCK))
 				return -EAGAIN;