Re: BUG: atomic counter underflow [Was: 2.6.16-rc6-mm1]
From: Ian Kent
Date: Thu Mar 23 2006 - 06:42:27 EST
On Sun, 19 Mar 2006, Jiri Slaby wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> Ian Kent napsal(a):
> > On Sun, 12 Mar 2006, Jiri Slaby wrote:
> >> 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.
> > btw what do you mean autofs-bind-mounted ?
> >> 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
> > There's some suspicious code in waitq.c.
> > Could you try the following patch for me please?
> Yes, the patch below does solve the problem, can go upstream, good work!
Sorry to take so long to get back, I've been busy.
Thanks for that.
I'll submit the patch.
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