diff options
| author | Dominique Martinet <asmadeus@codewreck.org> | 2022-08-17 14:58:44 +0900 |
|---|---|---|
| committer | Dominique Martinet <asmadeus@codewreck.org> | 2022-10-05 07:05:40 +0900 |
| commit | 52f1c45dde9136f964d63a77d19826c8a74e2c7f (patch) | |
| tree | 1d66eb24517644fca387fc08b288c821bceb830b /net/9p | |
| parent | b90cb1053190353cc30f0fef0ef1f378ccc063c5 (diff) | |
9p: trans_fd/p9_conn_cancel: drop client lock earlier
syzbot reported a double-lock here and we no longer need this
lock after requests have been moved off to local list:
just drop the lock earlier.
Link: https://lkml.kernel.org/r/20220904064028.1305220-1-asmadeus@codewreck.org
Reported-by: syzbot+50f7e8d06c3768dd97f3@syzkaller.appspotmail.com
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Tested-by: Schspa Shi <schspa@gmail.com>
Diffstat (limited to 'net/9p')
| -rw-r--r-- | net/9p/trans_fd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index e758978b44be..60fcc6b30b46 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -205,6 +205,8 @@ static void p9_conn_cancel(struct p9_conn *m, int err) list_move(&req->req_list, &cancel_list); } + spin_unlock(&m->client->lock); + list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) { p9_debug(P9_DEBUG_ERROR, "call back req %p\n", req); list_del(&req->req_list); @@ -212,7 +214,6 @@ static void p9_conn_cancel(struct p9_conn *m, int err) req->t_err = err; p9_client_cb(m->client, req, REQ_STATUS_ERROR); } - spin_unlock(&m->client->lock); } static __poll_t |