fs/afs/rxrpc.c:187:17-21: ERROR: reference preceded by free on line 184 (fwd)

fs/afs/rxrpc.c:187:17-21: ERROR: reference preceded by free on line 184 (fwd)

[Julia Lawall]

No idea if this is a problem.  Maybe trace_afs_call is just using the
address?

julia

---------- Forwarded message ----------
Date: Thu, 23 Feb 2017 23:18:26 +0800
From: kbuild test robot <fengguang.wu@intel.com>
To: kbuild@01.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Subject: fs/afs/rxrpc.c:187:17-21: ERROR: reference preceded by free on line 184


tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bc49a7831b1137ce1c2dda1c57e3631655f5d2ae
commit: 341f741f04beceebcb30daa12ae2e5e52e64e532 afs: Refcount the afs_call struct
date:   6 weeks ago
:::::: branch date: 12 hours ago
:::::: commit date: 6 weeks ago

>> fs/afs/rxrpc.c:187:17-21: ERROR: reference preceded by free on line 184

git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git remote update linus
git checkout 341f741f04beceebcb30daa12ae2e5e52e64e532
vim +187 fs/afs/rxrpc.c

6c67c7c3 David Howells            2014-05-21  178  			call->rxcall = NULL;
6c67c7c3 David Howells            2014-05-21  179  		}
6cf12869 Nathaniel Wesley Filardo 2014-05-21  180  		if (call->type->destructor)
6c67c7c3 David Howells            2014-05-21  181  			call->type->destructor(call);
341f741f David Howells            2017-01-05  182
341f741f David Howells            2017-01-05  183  		kfree(call->request);
341f741f David Howells            2017-01-05 @184  		kfree(call);
341f741f David Howells            2017-01-05  185
341f741f David Howells            2017-01-05  186  		o = atomic_dec_return(&afs_outstanding_calls);
341f741f David Howells            2017-01-05 @187  		trace_afs_call(call, afs_call_trace_free, 0, o,
341f741f David Howells            2017-01-05  188  			       __builtin_return_address(0));
341f741f David Howells            2017-01-05  189  		if (o == 0)
341f741f David Howells            2017-01-05  190  			wake_up_atomic_t(&afs_outstanding_calls);

---
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Re: fs/afs/rxrpc.c:187:17-21: ERROR: reference preceded by free on line 184 (fwd)

[David Howells]

Julia Lawall <julia.lawall@lip6.fr> wrote:

> No idea if this is a problem.  Maybe trace_afs_call is just using the
> address?

Yes.  It's merely prints the address of the call struct - so it doesn't matter
if we've freed it or not.

David