From: Chuck Lever <chuck.lever@oracle.com>
Date: Thu, 13 Jan 2022 12:20:36 -0500
Subject: SUNRPC: Don't dereference xprt->snd_task if it's a cookie
Git-commit: aed28b7a2d620cb5cd0c554cb889075c02e25e8e
Patch-mainline: v5.17-rc2
References: git-fixes
Fixes: e26d9972720e ("SUNRPC: Clean up scheduling of autoclose")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Acked-by: Petr Pavlu <petr.pavlu@suse.com>
---
include/trace/events/sunrpc.h | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index a6af347c935d..7cdcbc6dc38e 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -965,7 +965,8 @@ TRACE_EVENT(rpc_socket_nospace,
{ BIT(XPRT_REMOVE), "REMOVE" }, \
{ BIT(XPRT_CONGESTED), "CONGESTED" }, \
{ BIT(XPRT_CWND_WAIT), "CWND_WAIT" }, \
- { BIT(XPRT_WRITE_SPACE), "WRITE_SPACE" })
+ { BIT(XPRT_WRITE_SPACE), "WRITE_SPACE" }, \
+ { BIT(XPRT_SND_IS_COOKIE), "SND_IS_COOKIE" })
DECLARE_EVENT_CLASS(rpc_xprt_lifetime_class,
TP_PROTO(
@@ -1162,8 +1163,11 @@ DECLARE_EVENT_CLASS(xprt_writelock_event,
__entry->task_id = -1;
__entry->client_id = -1;
}
- __entry->snd_task_id = xprt->snd_task ?
- xprt->snd_task->tk_pid : -1;
+ if (xprt->snd_task &&
+ !test_bit(XPRT_SND_IS_COOKIE, &xprt->state))
+ __entry->snd_task_id = xprt->snd_task->tk_pid;
+ else
+ __entry->snd_task_id = -1;
),
TP_printk("task:%u@%u snd_task:%u",
@@ -1208,8 +1212,12 @@ DECLARE_EVENT_CLASS(xprt_cong_event,
__entry->task_id = -1;
__entry->client_id = -1;
}
- __entry->snd_task_id = xprt->snd_task ?
- xprt->snd_task->tk_pid : -1;
+ if (xprt->snd_task &&
+ !test_bit(XPRT_SND_IS_COOKIE, &xprt->state))
+ __entry->snd_task_id = xprt->snd_task->tk_pid;
+ else
+ __entry->snd_task_id = -1;
+
__entry->cong = xprt->cong;
__entry->cwnd = xprt->cwnd;
__entry->wait = test_bit(XPRT_CWND_WAIT, &xprt->state);