David Howells c97d3fb9e0 nvme-tcp: Fix comma-related oops
Fix a comma that should be a semicolon.  The comma is at the end of an
if-body and thus makes the statement after (a bvec_set_page()) conditional
too, resulting in an oops because we didn't fill out the bio_vec[]:

    BUG: kernel NULL pointer dereference, address: 0000000000000008
    #PF: supervisor read access in kernel mode
    #PF: error_code(0x0000) - not-present page
    ...
    Workqueue: nvme_tcp_wq nvme_tcp_io_work [nvme_tcp]
    RIP: 0010:skb_splice_from_iter+0xf1/0x370
    ...
    Call Trace:
     tcp_sendmsg_locked+0x3a6/0xdd0
     tcp_sendmsg+0x31/0x50
     inet_sendmsg+0x47/0x80
     sock_sendmsg+0x99/0xb0
     nvme_tcp_try_send_data+0x149/0x490 [nvme_tcp]
     nvme_tcp_try_send+0x1b7/0x300 [nvme_tcp]
     nvme_tcp_io_work+0x40/0xc0 [nvme_tcp]
     process_one_work+0x21c/0x430
     worker_thread+0x54/0x3e0
     kthread+0xf8/0x130

Fixes: 7769887817 ("nvme-tcp: Use sendmsg(MSG_SPLICE_PAGES) rather then sendpage")
Reported-by: Aurelien Aptel <aaptel@nvidia.com>
Link: https://lore.kernel.org/r/253mt0il43o.fsf@mtr-vdi-124.i-did-not-set--mail-host-address--so-tickle-me/
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Sagi Grimberg <sagi@grimberg.me>
cc: Willem de Bruijn <willemb@google.com>
cc: Keith Busch <kbusch@kernel.org>
cc: Jens Axboe <axboe@fb.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Chaitanya Kulkarni <kch@nvidia.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-nvme@lists.infradead.org
cc: netdev@vger.kernel.org
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-07-02 15:44:54 +01:00
2023-07-02 15:44:54 +01:00
2022-09-28 09:02:20 +02:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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