kmemleak throws the following error on devices using regmap_register_patch(). map->patch is allocated dynamically with krealloc() but never freed.
root@Zotac:~/kmod# cat /sys/kernel/debug/kmemleak unreferenced object 0xffff8880641c4e08 (size 96): comm "systemd-udevd", pid 266, jiffies 4294736541 (age 414.914s) hex dump (first 32 bytes): 3d 01 00 00 00 36 00 00 00 00 00 00 12 01 00 00 =....6.......... a8 0a 00 00 00 00 00 00 14 01 00 00 aa 0a 00 00 ................ backtrace: [<00000000f2841faf>] krealloc+0x63/0xc0 [<00000000ed643fb3>] regmap_register_patch+0x68/0x1d0 [<000000001806a5c3>] 0xffffffffc088a5f9 [<00000000f4781e26>] i2c_device_probe+0x462/0x4b0 [<000000009dd7f5f4>] really_probe+0x17f/0x520 [<00000000be42920d>] driver_probe_device+0x114/0x170 [<00000000e5840d3f>] device_driver_attach+0x82/0x90 [<0000000027828801>] __driver_attach+0xa9/0x190 [<0000000085195e73>] bus_for_each_dev+0xe1/0x140 [<0000000070edb38c>] bus_add_driver+0x224/0x2e0 [<000000002d41b24a>] driver_register+0xd3/0x150 [<0000000055dbb3fb>] i2c_register_driver+0x6b/0xd0 [<00000000bf84b954>] do_one_initcall+0x86/0x2a0 [<000000001d939871>] do_init_module+0xf8/0x350 [<00000000267b474f>] load_module+0x41a9/0x44c0 [<000000007d8014dc>] __do_sys_finit_module+0x121/0x1b0
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@gmail.com Reviewed-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Rander Wang rander.wang@linux.intel.com Reviewed-by: Guennadi Liakhovetski guennadi.liakhovetski@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com --- drivers/base/regmap/regmap.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index c472f624382d..46f4b6322e47 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1357,6 +1357,7 @@ void regmap_exit(struct regmap *map) if (map->hwlock) hwspin_lock_free(map->hwlock); kfree_const(map->name); + kfree(map->patch); kfree(map); } EXPORT_SYMBOL_GPL(regmap_exit);