This patch causes messages like 'unregister_netdevice: waiting for ppp0 to
become free. Usage count = 1' when I try 'ifdown ppp0'. This happens in all
kernel versions containing this commit and doesn't happen in 2.6.24-rc8
with this commit reverted.
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WBR, wRAR (ALT Linux Team)
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From: Pavel Emelyanov <[EMAIL PROTECTED]>
Date: Thu, 10 Jan 2008 13:56:53 +0300
> The neightbl_fill_parms() is called under the write-locked
> tbl->lock and accesses the parms->dev. The negh_parm_release()
> calls the dev_put(parms->dev) without this lock. This
> creates a tiny race window on whi
The neightbl_fill_parms() is called under the write-locked
tbl->lock and accesses the parms->dev. The negh_parm_release()
calls the dev_put(parms->dev) without this lock. This
creates a tiny race window on which the parms contains
potentially stale dev pointer.
To fix this race it's enough to mov
