diff options
| author | Stefan Metzmacher <metze@samba.org> | 2025-08-12 13:03:19 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2025-09-17 20:33:44 -0500 |
| commit | d9dcbbcf9145b68aa85c40947311a6907277e097 (patch) | |
| tree | b2a24d690e648a2c413d9eaec03fa624f702ca02 | |
| parent | bac28f604c7699727b2fecf14c3a54668bbe458e (diff) | |
smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
In smbd_destroy() we may destroy the memory so we better
wait until post_send_credits_work is no longer pending
and will never be started again.
I actually just hit the case using rxe:
WARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]
...
[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]
[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5
[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30
[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]
[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5
[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5
[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60
[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5
[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]
[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]
[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]
[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10
[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10
[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0
[ 5305.687889] [ T138] process_one_work+0x629/0xf80
[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5
[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30
[ 5305.687933] [ T138] worker_thread+0x87f/0x1570
...
It means rxe_post_recv was called after rdma_destroy_qp().
This happened because put_receive_buffer() was triggered
by ib_drain_qp() and called:
queue_work(info->workqueue, &info->post_send_credits_work);
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Fixes: f198186aa9bb ("CIFS: SMBD: Establish SMB Direct connection")
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/smb/client/smbdirect.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c index 1f8de8866c06..1f3d64145863 100644 --- a/fs/smb/client/smbdirect.c +++ b/fs/smb/client/smbdirect.c @@ -1347,6 +1347,9 @@ void smbd_destroy(struct TCP_Server_Info *server) sc->status == SMBDIRECT_SOCKET_DISCONNECTED); } + log_rdma_event(INFO, "cancelling post_send_credits_work\n"); + disable_work_sync(&info->post_send_credits_work); + log_rdma_event(INFO, "destroying qp\n"); ib_drain_qp(sc->ib.qp); rdma_destroy_qp(sc->rdma.cm_id); |