On Wed, May 22, 2013 at 09:54:10AM +1000, Dave Chinner wrote:
> On Tue, May 21, 2013 at 07:40:16PM -0400, Dave Jones wrote:
> > On Wed, May 22, 2013 at 09:34:29AM +1000, Dave Chinner wrote:
> > > On Tue, May 21, 2013 at 06:52:57PM -0400, Dave Jones wrote:
> > > > [ 464.210598] XFS: Assertion failed: (mask & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID| ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0, file: fs/xfs/xfs_iops.c, line: 719
> > >
> > > Never seen that fire before, but this is why we have ASSERT()s like
> > > this - we're being handed something by the VFS we don't expect...
> > >
> > > Can you give me some context of the file permissions before the
> > > syscall and what the syscall parameters are? i.e. is this likely to
> > > be trying to strip SUID/SGID during the truncate operation?
> >
> > no idea tbh. Is there something I can add to that assert to dump
> > which file it was triggered by ?
>
> Convert the assert to a if (), and then in the body do something
> like:
>
> if (mask & (...) {
> char buf[MAX_PATHLEN];
>
> d_path(VFS_I(ip)->i_dentry, buf, MAXPATHLEN);
> xfs_warn(mp, "%s: mask 0x%x mismatch on file %s\n",
> __func__, mask, buf);
> ASSERT(0);
> }
fs/xfs/xfs_iops.c: In function ‘xfs_setattr_size’:
fs/xfs/xfs_iops.c:723:17: error: incompatible type for argument 1 of ‘d_path’
d_path(VFS_I(ip)->i_dentry, buf, MAXPATHLEN);
^
In file included from include/linux/fs.h:8:0,
from include/linux/genhd.h:65,
from include/linux/blkdev.h:9,
from fs/xfs/xfs_linux.h:45,
from fs/xfs/xfs.h:32,
from fs/xfs/xfs_iops.c:18:
include/linux/dcache.h:338:14: note: expected ‘const struct path *’ but argument is of type ‘struct hlist_head’
extern char *d_path(const struct path *, char *, int);
^
Dave
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