> From: Takashi Iwai <[email protected]> > Subject: vfs: fix invalid ida_remove() call > > When the group id of a shared mount is not allocated, the umount still > tries to call mnt_release_group_id(), which eventually hits a kernel > warning at ida_remove() spewing a message like: > > ida_remove called for id=0 which is not allocated. > > This patch fixes the bug simply checking the group id in the caller. > > Signed-off-by: Takashi Iwai <[email protected]> > Reported-by: Cristian Rodr�guez <[email protected]> > Cc: Al Viro <[email protected]> > Signed-off-by: Andrew Morton <[email protected]> > --- >
Tested-by Chen Gang <[email protected]> Thanks. > fs/pnode.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff -puN fs/pnode.c~vfs-fix-invalid-ida_remove-call fs/pnode.c > --- a/fs/pnode.c~vfs-fix-invalid-ida_remove-call > +++ a/fs/pnode.c > @@ -83,7 +83,8 @@ static int do_make_slave(struct mount *m > if (peer_mnt == mnt) > peer_mnt = NULL; > } > - if (IS_MNT_SHARED(mnt) && list_empty(&mnt->mnt_share)) > + if (mnt->mnt_group_id && IS_MNT_SHARED(mnt) && > + list_empty(&mnt->mnt_share)) > mnt_release_group_id(mnt); > > list_del_init(&mnt->mnt_share); > _ > > > -- Chen Gang Asianux Corporation -- 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/
