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To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, raven@themaw.net
Subject: BUG: atomic counter underflow [Was: 2.6.16-rc6-mm1]
In-reply-to: <20060312031036.3a382581.akpm@osdl.org>
Message-Id: <E1FIYLc-00080b-00@decibel.fi.muni.cz>
From: Jiri Slaby <xslaby@informatics.muni.cz>
Date: Sun, 12 Mar 2006 22:43:32 +0100
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Andrew Morton wrote:
>ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.16-rc6/2.6.16-rc6-mm1/
[snip]
>+remove-redundant-check-from-autofs4_put_super.patch
>+autofs4-follow_link-missing-funtionality.patch
>
> Update autofs4 patches in -mm.
Hello, 

I caught this during ftp browsing autofs-bind-mounted directories. I don't know
circumstancies and if the patches above are source of problem. I also don't know
if -rc6-mm1 is the first one.

BUG: atomic counter underflow at:
 [<c0104736>] show_trace+0x13/0x15
 [<c0104873>] dump_stack+0x1e/0x20
 [<c01d6c97>] autofs4_wait+0x751/0x93a
 [<c01d543b>] try_to_fill_dentry+0xca/0x11c
 [<c01d59b3>] autofs4_revalidate+0xe1/0x148
 [<c0171338>] do_lookup+0x40/0x157
 [<c0172ec4>] __link_path_walk+0x804/0xe8c
 [<c017359c>] link_path_walk+0x50/0xe8
 [<c01738b7>] do_path_lookup+0x10f/0x26d
 [<c017429c>] __user_walk_fd+0x33/0x50
 [<c016d226>] vfs_stat_fd+0x1e/0x50
 [<c016d30d>] vfs_stat+0x20/0x22
 [<c016d328>] sys_stat64+0x19/0x2d
 [<c0103127>] syscall_call+0x7/0xb

regards,
--
Jiri Slaby         www.fi.muni.cz/~xslaby
~\-/~      jirislaby@gmail.com      ~\-/~
B67499670407CE62ACC8 22A032CC55C339D47A7E
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