From: Liguang Zhang <zhangliguang@xxxxxxxxxxxxxxxxx> [ Upstream commit 6abc7622271dc520f241462e2474c71723638851 ] Destroy ghes_estatus_pool and release memory allocated via vmalloc() on errors in ghes_estatus_pool_init() in order to avoid memory leaks. [ bp: do the labels properly and with descriptive names and massage. ] Signed-off-by: Liguang Zhang <zhangliguang@xxxxxxxxxxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Link: https://lkml.kernel.org/r/1563173924-47479-1-git-send-email-zhangliguang@xxxxxxxxxxxxxxxxx Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/acpi/apei/ghes.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 993940d582f50..6875bf629f16e 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -153,6 +153,7 @@ static void ghes_unmap(void __iomem *vaddr, enum fixed_addresses fixmap_idx) int ghes_estatus_pool_init(int num_ghes) { unsigned long addr, len; + int rc; ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1); if (!ghes_estatus_pool) @@ -164,7 +165,7 @@ int ghes_estatus_pool_init(int num_ghes) ghes_estatus_pool_size_request = PAGE_ALIGN(len); addr = (unsigned long)vmalloc(PAGE_ALIGN(len)); if (!addr) - return -ENOMEM; + goto err_pool_alloc; /* * New allocation must be visible in all pgd before it can be found by @@ -172,7 +173,19 @@ int ghes_estatus_pool_init(int num_ghes) */ vmalloc_sync_all(); - return gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1); + rc = gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1); + if (rc) + goto err_pool_add; + + return 0; + +err_pool_add: + vfree((void *)addr); + +err_pool_alloc: + gen_pool_destroy(ghes_estatus_pool); + + return -ENOMEM; } static int map_gen_v2(struct ghes *ghes) -- 2.20.1
