Messages in this thread Patch in this message | | | Date | Mon, 12 Jun 2006 15:16:35 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: 2.6.16-rc6-mm2 |
| |
On Mon, 12 Jun 2006, Cedric Le Goater wrote:
> Unable to handle kernel NULL pointer dereference at 0000000000000007 RIP: > [<ffffffff8025b017>] dec_zone_page_state+0x1/0x5b
Seems that req->wb_page may be NULL.
This patch may fix it but we may miss an unstable page then. We may have to move the decrement of NR_UNSTABLE to a different location when wb_page is still valid.
Index: linux-2.6.17-rc6-cl/fs/nfs/write.c =================================================================== --- linux-2.6.17-rc6-cl.orig/fs/nfs/write.c 2006-06-12 13:37:47.321243148 -0700 +++ linux-2.6.17-rc6-cl/fs/nfs/write.c 2006-06-12 15:13:48.020908204 -0700 @@ -1419,7 +1419,8 @@ static void nfs_commit_done(struct rpc_t nfs_mark_request_dirty(req); next: nfs_clear_page_writeback(req); - dec_zone_page_state(req->wb_page, NR_UNSTABLE); + if (req->wb_page) + dec_zone_page_state(req->wb_page, NR_UNSTABLE); } } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |