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From: James Simmons <jsimmons@infradead.org>
To: Andreas Dilger <adilger@whamcloud.com>,
	Oleg Drokin <green@whamcloud.com>, NeilBrown <neilb@suse.de>
Cc: Lai Siyao <lai.siyao@whamcloud.com>,
	Lustre Development List <lustre-devel@lists.lustre.org>
Subject: [lustre-devel] [PATCH 05/27] lustre: llite: default lsm update may memory leak
Date: Sun, 13 Jun 2021 19:11:15 -0400	[thread overview]
Message-ID: <1623625897-17706-6-git-send-email-jsimmons@infradead.org> (raw)
In-Reply-To: <1623625897-17706-1-git-send-email-jsimmons@infradead.org>

From: Lai Siyao <lai.siyao@whamcloud.com>

ll_update_default_lsm_md() should check whether lli_default_lsm_md
is set before setting it to the data from lustre_md, and if it's set,
release the old data to avoid memory leak

WC-bug-id: https://jira.whamcloud.com/browse/LU-14004
Lustre-commit: cd2ad336177f8f31 ("LU-14004 llite: default lsm update may memory leak")
Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/40103
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 fs/lustre/llite/llite_lib.c | 35 ++++++++++++++++-------------------
 1 file changed, 16 insertions(+), 19 deletions(-)

diff --git a/fs/lustre/llite/llite_lib.c b/fs/lustre/llite/llite_lib.c
index 39bdee0..e98972d 100644
--- a/fs/lustre/llite/llite_lib.c
+++ b/fs/lustre/llite/llite_lib.c
@@ -1505,30 +1505,27 @@ static void ll_update_default_lsm_md(struct inode *inode, struct lustre_md *md)
 			}
 			up_write(&lli->lli_lsm_sem);
 		}
-	} else if (lli->lli_default_lsm_md) {
-		/* update default lsm if it changes */
+		return;
+	}
+
+	if (lli->lli_default_lsm_md) {
+		/* do nonthing if default lsm isn't changed */
 		down_read(&lli->lli_lsm_sem);
 		if (lli->lli_default_lsm_md &&
-		    !lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
-			up_read(&lli->lli_lsm_sem);
-			down_write(&lli->lli_lsm_sem);
-			if (lli->lli_default_lsm_md)
-				lmv_free_memmd(lli->lli_default_lsm_md);
-			lli->lli_default_lsm_md = md->default_lmv;
-			lsm_md_dump(D_INODE, md->default_lmv);
-			md->default_lmv = NULL;
-			up_write(&lli->lli_lsm_sem);
-		} else {
+		    lsm_md_eq(lli->lli_default_lsm_md, md->default_lmv)) {
 			up_read(&lli->lli_lsm_sem);
+			return;
 		}
-	} else {
-		/* init default lsm */
-		down_write(&lli->lli_lsm_sem);
-		lli->lli_default_lsm_md = md->default_lmv;
-		lsm_md_dump(D_INODE, md->default_lmv);
-		md->default_lmv = NULL;
-		up_write(&lli->lli_lsm_sem);
+		up_read(&lli->lli_lsm_sem);
 	}
+
+	down_write(&lli->lli_lsm_sem);
+	if (lli->lli_default_lsm_md)
+		lmv_free_memmd(lli->lli_default_lsm_md);
+	lli->lli_default_lsm_md = md->default_lmv;
+	lsm_md_dump(D_INODE, md->default_lmv);
+	md->default_lmv = NULL;
+	up_write(&lli->lli_lsm_sem);
 }
 
 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
-- 
1.8.3.1

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  parent reply	other threads:[~2021-06-13 23:12 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-13 23:11 [lustre-devel] [PATCH 00/27] lustre: sync to 2.14.52 James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 01/27] lustre: uapi: add mdt_hash_name James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 02/27] lustre: uapi: rename CONFIG_T_* to MGS_CFG_T_* James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 03/27] lnet: o2iblnd: fix bug in list_first_entry() change James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 04/27] lustre: flr: mmap write/punch does not stale other mirrors James Simmons
2021-06-13 23:11 ` James Simmons [this message]
2021-06-13 23:11 ` [lustre-devel] [PATCH 06/27] lustre: pcc: don't alloc FID in LLITE for pcc open James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 07/27] lustre: quota: default OST Pool Quotas James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 08/27] lustre: rename tgt_pool_* functions James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 09/27] lustre: llite: refresh layout after mirror merge/split James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 10/27] lustre: ptlrpc: do not match reply with resent RPC James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 11/27] lustre: vvp: wait for nrpages to be updated James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 12/27] lustre: obd: check if sbi->ll_md_exp is initialized James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 13/27] lustre: osc: Batch gang_lookup cbs James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 14/27] lustre: llite: Return errors for aio James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 15/27] lnet: do not crash if lnet_sock_getaddr returns error James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 16/27] lustre: sec: forbid file rename from enc to unencrypted dir James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 17/27] lustre: mdc: start changelog thread upon first access James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 18/27] lustre: llog: changelog purge deletes plain llog James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 19/27] lnet: libcfs: allow comma-separated masks James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 20/27] lustre: osc: cleanup comment in osc_object_is_contended James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 21/27] lnet: simplify lnet_ni_add_interface James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 22/27] lustre: lmv: change default hash type to crush James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 23/27] lustre: ptlrpc: move more members in PTLRPC request into pill James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 24/27] lustre: llite: add selinux testing James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 25/27] lnet: Fix destination NID for discovery PUSH James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 26/27] lnet: Check if discovery toggled off in ping reply James Simmons
2021-06-13 23:11 ` [lustre-devel] [PATCH 27/27] lustre: update version to 2.14.52 James Simmons

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