[132/622] lustre: mgc: don't proccess cld during stopping
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Message ID 1582838290-17243-133-git-send-email-jsimmons@infradead.org
State New
Headers show
Series
  • lustre: sync closely to 2.13.52
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Commit Message

James Simmons Feb. 27, 2020, 9:10 p.m. UTC
From: Alexander Boyko <c17825@cray.com>

The patch fixes the log processing during stopping. It was general
protection fault at mgc_process_cfg_log() at lsi access. Lsi pointer
was wrong 38323172756f6663, and all cld->cld_cfg.cfg_sb had invalid
data.

WC-bug-id: https://jira.whamcloud.com/browse/LU-10595
Lustre-commit: bda43cbe369a ("LU-10595 mgc: don't proccess cld during stopping")
Signed-off-by: Alexander Boyko <c17825@cray.com>
Cray-bug-id: LUS-6199
Reviewed-on: https://review.whamcloud.com/33190
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 fs/lustre/mgc/mgc_request.c | 5 +++++
 1 file changed, 5 insertions(+)

Patch
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diff --git a/fs/lustre/mgc/mgc_request.c b/fs/lustre/mgc/mgc_request.c
index c114aa8..785461b 100644
--- a/fs/lustre/mgc/mgc_request.c
+++ b/fs/lustre/mgc/mgc_request.c
@@ -1651,6 +1651,11 @@  int mgc_process_log(struct obd_device *mgc, struct config_llog_data *cld)
 				goto restart;
 			} else {
 				mutex_lock(&cld->cld_lock);
+				/* unlock/lock mutex, so check stopping again */
+				if (cld->cld_stopping) {
+					mutex_unlock(&cld->cld_lock);
+					return 0;
+				}
 				spin_lock(&config_list_lock);
 				cld->cld_lostlock = 1;
 				spin_unlock(&config_list_lock);