Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
module: Use RCU in module_kallsyms_on_each_symbol().
module::kallsyms can be accessed under RCU assumption.
Use rcu_dereference() to access module::kallsyms.
Update callers.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250108090457.512198-9-bigeasy@linutronix.de
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
authored by
Sebastian Andrzej Siewior
and committed by
Petr Pavlu
cdd9335c
f27d8ed6
+2
-4
+2
-4
kernel/module/kallsyms.c
+2
-4
kernel/module/kallsyms.c
···
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if (modname && strcmp(modname, mod->name))
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continue;
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-
/* Use rcu_dereference_sched() to remain compliant with the sparse tool */
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-
preempt_disable();
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kallsyms = rcu_dereference_sched(mod->kallsyms);
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-
preempt_enable();
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+
kallsyms = rcu_dereference_check(mod->kallsyms,
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lockdep_is_held(&module_mutex));
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for (i = 0; i < kallsyms->num_symtab; i++) {
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const Elf_Sym *sym = &kallsyms->symtab[i];