linux-kernel - WARNING: at lib/kref.c:33 kref_get() (-mm 2007-11-06-02-32++)

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Message-Id: <200711100212.lAA2Cll0015004@agora.fsl.cs.sunysb.edu>
Date:	Fri, 9 Nov 2007 21:12:47 -0500
From:	Erez Zadok <ezk@...sunysb.edu>
To:	linux-kernel@...r.kernel.org
Subject: WARNING: at lib/kref.c:33 kref_get() (-mm 2007-11-06-02-32++)

Setup: FC6 system with MM snapshot broken-out-2007-11-06-02-32 and these two
patches added:

r-o-bind-mounts-track-number-of-mount-writer-fix-buggy-loop.patch
r-o-bind-mounts-track-number-of-mount-writer-fix-buggy-loop-checkpatch-fixes.patch

Booting the machine, waiting a few minutes (not logging in or doing anything
else).  I get:

WARNING: at lib/kref.c:33 kref_get()
 [<c020282a>] show_trace_log_lvl+0x12/0x25
 [<c0203024>] show_trace+0xd/0x10
 [<c0203120>] dump_stack+0x15/0x17
 [<c02c7f85>] kref_get+0x26/0x30
 [<c02c731b>] kobject_get+0x12/0x17
 [<c02c7770>] kobject_add+0x97/0x162
 [<c02164e5>] uids_user_create+0x41/0x5d
 [<c0216850>] alloc_uid+0xc9/0x171
 [<c0219b50>] set_user+0x1f/0x93
 [<c021b445>] sys_setuid+0x4b/0xcb
 [<c02021fe>] sysenter_past_esp+0x5f/0x91
 =======================

There's no other indication where the setuid(2) came from, perhaps cron?

Erez.
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