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ACPI / APEI: Release resources if gen_pool_add() fails 

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@linux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/1563173924-47479-1-git-send-email-zhangliguang@linux.alibaba.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Liguang Zhang 2019-07-15 14:58:44 +08:00 committed by Rafael J. Wysocki
parent bb100b6476
commit 6abc762227
1 changed files with 15 additions and 2 deletions
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17
drivers/acpi/apei/ghes.c
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@ -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)