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Commit d15b774c authored by Alasdair G Kergon's avatar Alasdair G Kergon
Browse files

dm: fix idr leak on module removal 



Destroy _minor_idr when unloading the core dm module.  (Found by kmemleak.)

Cc: stable@kernel.org
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent bb91bc7b

drivers/md/dm.c

+8 −2
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ static const char *_name = DM_NAME; 
static unsigned int major = 0;

static unsigned int _major = 0;



static DEFINE_IDR(_minor_idr);



static DEFINE_SPINLOCK(_minor_lock);

/*

 * For bio-based dm.
@@ -313,6 +315,12 @@ static void __exit dm_exit(void) 


	while (i--)

		_exits[i]();



	/*

	 * Should be empty by this point.

	 */

	idr_remove_all(&_minor_idr);

	idr_destroy(&_minor_idr);

}



/*
@@ -1705,8 +1713,6 @@ static int dm_any_congested(void *congested_data, int bdi_bits) 
/*-----------------------------------------------------------------

 * An IDR is used to keep track of allocated minor numbers.

 *---------------------------------------------------------------*/

static DEFINE_IDR(_minor_idr);



static void free_minor(int minor)

{

	spin_lock(&_minor_lock);