linux-kernel - Re: [PATCH] tty_io: fix race in master pty close/slave pty close path

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Message-ID: <20070222200006.GP29690@cathedrallabs.org>
Date:	Thu, 22 Feb 2007 15:00:06 -0500
From:	Aristeu Sergio Rozanski Filho <aristeu.sergio@...il.com>
To:	Chuck Ebbert <cebbert@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty_io: fix race in master pty close/slave pty close path

> Would another possible trace look like this?
> 
> idr_remove called for id=1 which is not allocated.
>  [<c0403f10>] dump_trace+0x69/0x1af
>  [<c040406e>] show_trace_log_lvl+0x18/0x2c
>  [<c04045e9>] show_trace+0xf/0x11
>  [<c0404673>] dump_stack+0x15/0x17
>  [<c04d3fcb>] idr_remove+0xe2/0x143
>  [<c051ee50>] release_dev+0x63b/0x652
>  [<c051ee6e>] tty_release+0x7/0xa
>  [<c0461b2e>] __fput+0xba/0x178
>  [<c045f466>] filp_close+0x52/0x59
(snip)

> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=211429
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=227203
yeap, this patch may fix these too. Will build a test kernel with the
patch included and hand over to reporters to test.

-- 
Aristeu

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