From: Chintan Pandya <cpandya@codeaurora.org>
To: vbabka@suse.cz, labbott@redhat.com, catalin.marinas@arm.com,
hannes@cmpxchg.org, f.fainelli@gmail.com, xieyisheng1@huawei.com,
ard.biesheuvel@linaro.org, richard.weiyang@gmail.com,
byungchul.park@lge.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Chintan Pandya <cpandya@codeaurora.org>
Subject: [PATCH 2/2] mm: vmalloc: Pass proper vm_start into debugobjects
Date: Fri, 13 Apr 2018 17:03:54 +0530 [thread overview]
Message-ID: <1523619234-17635-3-git-send-email-cpandya@codeaurora.org> (raw)
In-Reply-To: <1523619234-17635-1-git-send-email-cpandya@codeaurora.org>
Client can call vunmap with some intermediate 'addr'
which may not be the start of the VM area. Entire
unmap code works with vm->vm_start which is proper
but debug object API is called with 'addr'. This
could be a problem within debug objects.
Pass proper start address into debug object API.
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
---
mm/vmalloc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9ff21a1..28034c55 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1526,8 +1526,8 @@ static void __vunmap(const void *addr, int deallocate_pages)
return;
}
- debug_check_no_locks_freed(addr, get_vm_area_size(area));
- debug_check_no_obj_freed(addr, get_vm_area_size(area));
+ debug_check_no_locks_freed(area->addr, get_vm_area_size(area));
+ debug_check_no_obj_freed(area->addr, get_vm_area_size(area));
remove_vm_area(addr);
if (deallocate_pages) {
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation
Center, Inc., is a member of Code Aurora Forum, a Linux Foundation
Collaborative Project
next prev parent reply other threads:[~2018-04-13 11:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 11:33 [PATCH 0/2] vunmap and debug objects Chintan Pandya
2018-04-13 11:33 ` [PATCH 1/2] mm: vmalloc: Avoid racy handling of debugobjects in vunmap Chintan Pandya
2018-04-13 11:33 ` Chintan Pandya [this message]
2018-04-13 12:01 ` [PATCH 2/2] mm: vmalloc: Pass proper vm_start into debugobjects Anshuman Khandual
2018-04-16 12:09 ` Chintan Pandya
2018-04-17 3:09 ` Anshuman Khandual
2018-04-17 5:10 ` Chintan Pandya
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