diff options
| author | Roland Dreier <rolandd@cisco.com> | 2005-08-26 18:34:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-26 19:37:12 -0700 |
| commit | e1bcfcaa0b3bec2a67b22c565a0bf508ea90db1d (patch) | |
| tree | 01c6de89a3d60c35d2133c0b6b1903509a8f1df8 | |
| parent | 1c9cf6f9861f8d27303ee2531b3b7686269c71ce (diff) | |
[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>
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index eb99e693dec2..5f6e9ea29cd7 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -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); |