On Saturday November 11, [email protected] wrote:
> On Sat, 11 Nov 2006 03:29:32 -0800
> [email protected] wrote:
>
> > http://bugzilla.kernel.org/show_bug.cgi?id=7495
> >
> > Summary: Kernel periodically hangs.
> > Kernel Version: Linux version 2.6.18.2 (root@pub) (gcc version 3.4.6)
> > #13 SMP Fr
> > Status: NEW
> > Severity: blocking
> > Owner: [email protected]
> > Submitter: [email protected]
So getting back to the main issue in this bug report.....
> >
> >
> > [42587.676000] BUG: unable to handle kernel NULL pointer dereference at
> > virtual address 0000003c
it would appear that in:
if (inode->i_sb && inode->i_sb->s_op->clear_inode)
inode->i_sb->s_op->clear_inode(inode);
inode->i_sb->s_op is NULL. This is unfortunate :-)
alloc_super initialises s_op to '&default_op' and it isn't cleared on
unmount, so the implication seems to be that i_sb has been freed and
the memory has been reused. This tends to suggest that
generic_shutdown_super isn't releasing all inodes before the
superblock gets destroyed.
I cannot see how this could be happening yet, but it might be helpful
to compile with CONFIG_DEBUG_SLAB and maybe even
CONFIG_DEBUG_PAGEALLOC.
That might make the problem trigger earlier and so be easier to track.
NeilBrown
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
