OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] IB: fix use-after-free in user verbs cleanup 

Fix a use-after-free bug in userspace verbs cleanup: we can't touch
mr->device after we free mr by calling ib_dereg_mr().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland Dreier 2005-08-26 18:34:14 -07:00 committed by Linus Torvalds
parent 1c9cf6f986
commit e1bcfcaa0b
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/infiniband/core/uverbs_main.c
View File

@ -130,13 +130,14 @@ static int ib_dealloc_ucontext(struct ib_ucontext *context)
list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
struct ib_mr *mr = idr_find(&ib_uverbs_mr_idr, uobj->id);
struct ib_device *mrdev = mr->device;
struct ib_umem_object *memobj;
idr_remove(&ib_uverbs_mr_idr, uobj->id);
ib_dereg_mr(mr);
memobj = container_of(uobj, struct ib_umem_object, uobject);
ib_umem_release_on_close(mr->device, &memobj->umem);
ib_umem_release_on_close(mrdev, &memobj->umem);
list_del(&uobj->list);
kfree(memobj);