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Commit 12de38b1 authored by Catalin Marinas's avatar Catalin Marinas
Browse files

kmemleak: Inform kmemleak about pid_hash 



Kmemleak does not track alloc_bootmem calls but the pid_hash allocated
in pidhash_init() would need to be scanned as it contains pointers to
struct pid objects.

Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b6e68722

kernel/pid.c

+7 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/pid_namespace.h>

#include <linux/init_task.h>

#include <linux/syscalls.h>

#include <linux/kmemleak.h>



#define pid_hashfn(nr, ns)	\

	hash_long((unsigned long)nr + (unsigned long)ns, pidhash_shift)
@@ -512,6 +513,12 @@ void __init pidhash_init(void) 
	pid_hash = alloc_bootmem(pidhash_size *	sizeof(*(pid_hash)));

	if (!pid_hash)

		panic("Could not alloc pidhash!\n");

	/*

	 * pid_hash contains references to allocated struct pid objects and it

	 * must be scanned by kmemleak to avoid false positives.

	 */

	kmemleak_alloc(pid_hash, pidhash_size *	sizeof(*(pid_hash)), 0,

		       GFP_KERNEL);

	for (i = 0; i < pidhash_size; i++)

		INIT_HLIST_HEAD(&pid_hash[i]);

}