From: <gregkh@linuxfoundation.org>
To: levinsasha928@gmail.com,gregkh@linuxfoundation.org,JBottomley@Parallels.com,jslaby@suse.cz,michaelc@cs.wisc.edu
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "SCSI: iscsi: don't hang in endless loop if no targets present" has been added to the 3.0-stable tree
Date: Fri, 27 Sep 2013 16:07:13 -0700 [thread overview]
Message-ID: <1380323233807@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
SCSI: iscsi: don't hang in endless loop if no targets present
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-iscsi-don-t-hang-in-endless-loop-if-no-targets-present.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 46a7c17d26967922092f3a8291815ffb20f6cabe Mon Sep 17 00:00:00 2001
From: Sasha Levin <levinsasha928@gmail.com>
Date: Wed, 25 Jan 2012 22:16:16 -0500
Subject: SCSI: iscsi: don't hang in endless loop if no targets present
From: Sasha Levin <levinsasha928@gmail.com>
commit 46a7c17d26967922092f3a8291815ffb20f6cabe upstream.
iscsi_if_send_reply() may return -ESRCH if there were no targets to send
data to. Currently we're ignoring this value and looping in attempt to do it
over and over, which will usually lead in a hung task like this one:
[ 4920.817298] INFO: task trinity:9074 blocked for more than 120 seconds.
[ 4920.818527] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.819982] trinity D 0000000000000000 5504 9074 2756 0x00000004
[ 4920.825374] ffff880003961a98 0000000000000086 ffff8800001aa000 ffff8800001aa000
[ 4920.826791] 00000000001d4340 ffff880003961fd8 ffff880003960000 00000000001d4340
[ 4920.828241] 00000000001d4340 00000000001d4340 ffff880003961fd8 00000000001d4340
[ 4920.833231]
[ 4920.833519] Call Trace:
[ 4920.834010] [<ffffffff826363fa>] schedule+0x3a/0x50
[ 4920.834953] [<ffffffff82634ac9>] __mutex_lock_common+0x209/0x5b0
[ 4920.836226] [<ffffffff81af805d>] ? iscsi_if_rx+0x2d/0x990
[ 4920.837281] [<ffffffff81053943>] ? sched_clock+0x13/0x20
[ 4920.838305] [<ffffffff81af805d>] ? iscsi_if_rx+0x2d/0x990
[ 4920.839336] [<ffffffff82634eb0>] mutex_lock_nested+0x40/0x50
[ 4920.840423] [<ffffffff81af805d>] iscsi_if_rx+0x2d/0x990
[ 4920.841434] [<ffffffff810dffed>] ? sub_preempt_count+0x9d/0xd0
[ 4920.842548] [<ffffffff82637bb0>] ? _raw_read_unlock+0x30/0x60
[ 4920.843666] [<ffffffff821f71de>] netlink_unicast+0x1ae/0x1f0
[ 4920.844751] [<ffffffff821f7997>] netlink_sendmsg+0x227/0x350
[ 4920.845850] [<ffffffff821857bd>] ? sock_update_netprioidx+0xdd/0x1b0
[ 4920.847060] [<ffffffff82185732>] ? sock_update_netprioidx+0x52/0x1b0
[ 4920.848276] [<ffffffff8217f226>] sock_aio_write+0x166/0x180
[ 4920.849348] [<ffffffff810dfe41>] ? get_parent_ip+0x11/0x50
[ 4920.850428] [<ffffffff811d0d9a>] do_sync_write+0xda/0x120
[ 4920.851465] [<ffffffff810dffed>] ? sub_preempt_count+0x9d/0xd0
[ 4920.852579] [<ffffffff810dfe41>] ? get_parent_ip+0x11/0x50
[ 4920.853608] [<ffffffff81791887>] ? security_file_permission+0x27/0xb0
[ 4920.854821] [<ffffffff811d0f4c>] vfs_write+0x16c/0x180
[ 4920.855781] [<ffffffff811d104f>] sys_write+0x4f/0xa0
[ 4920.856798] [<ffffffff82638e79>] system_call_fastpath+0x16/0x1b
[ 4920.877487] 1 lock held by trinity/9074:
[ 4920.878239] #0: (rx_queue_mutex){+.+...}, at: [<ffffffff81af805d>] iscsi_if_rx+0x2d/0x990
[ 4920.880005] Kernel panic - not syncing: hung_task: blocked tasks
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Acked-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/scsi/scsi_transport_iscsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1747,7 +1747,7 @@ iscsi_if_rx(struct sk_buff *skb)
break;
err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
- } while (err < 0 && err != -ECONNREFUSED);
+ } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
skb_pull(skb, rlen);
}
mutex_unlock(&rx_queue_mutex);
Patches currently in stable-queue which might be from levinsasha928@gmail.com are
queue-3.0/scsi-iscsi-don-t-hang-in-endless-loop-if-no-targets-present.patch
reply other threads:[~2013-09-27 23:07 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1380323233807@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=JBottomley@Parallels.com \
--cc=jslaby@suse.cz \
--cc=levinsasha928@gmail.com \
--cc=michaelc@cs.wisc.edu \
--cc=stable-commits@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.