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Filename Latest commit message Latest commit date
Kaike Wan b0a2af91cd IB/rdmavt: Free kernel completion queue when done 
commit 941224e09483ea3428ffc6402de56a4a2e2cb6da upstream.

When a kernel ULP requests the rdmavt to create a completion queue, it
allocated the queue and set cq->kqueue to point to it. However, when the
completion queue is destroyed, cq->queue is freed instead, leading to a
memory leak:

https://lore.kernel.org/r/215235485.15264050.1583334487658.JavaMail.zimbra@redhat.com

 unreferenced object 0xffffc90006639000 (size 12288):
 comm "kworker/u128:0", pid 8, jiffies 4295777598 (age 589.085s)
    hex dump (first 32 bytes):
      4d 00 00 00 4d 00 00 00 00 c0 08 ac 8b 88 ff ff  M...M...........
      00 00 00 00 80 00 00 00 00 00 00 00 10 00 00 00  ................
    backtrace:
      [<0000000035a3d625>] __vmalloc_node_range+0x361/0x720
      [<000000002942ce4f>] __vmalloc_node.constprop.30+0x63/0xb0
      [<00000000f228f784>] rvt_create_cq+0x98a/0xd80 [rdmavt]
      [<00000000b84aec66>] __ib_alloc_cq_user+0x281/0x1260 [ib_core]
      [<00000000ef3764be>] nvme_rdma_cm_handler+0xdb7/0x1b80 [nvme_rdma]
      [<00000000936b401c>] cma_cm_event_handler+0xb7/0x550 [rdma_cm]
      [<00000000d9c40b7b>] addr_handler+0x195/0x310 [rdma_cm]
      [<00000000c7398a03>] process_one_req+0xdd/0x600 [ib_core]
      [<000000004d29675b>] process_one_work+0x920/0x1740
      [<00000000efedcdb5>] worker_thread+0x87/0xb40
      [<000000005688b340>] kthread+0x327/0x3f0
      [<0000000043a168d6>] ret_from_fork+0x3a/0x50

This patch fixes the issue by freeing cq->kqueue instead.

Fixes: 239b0e52d8 ("IB/hfi1: Move rvt_cq_wc struct into uapi directory")
Link: https://lore.kernel.org/r/20200313123957.14343.43879.stgit@awfm-01.aw.intel.com
Cc: <stable@vger.kernel.org> # 5.4.x
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-01 11:01:57 +02:00
arch arm64: dts: ls1043a: FMan erratum A050385 2020-04-01 11:01:52 +02:00
block block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group() 2020-03-25 08:25:49 +01:00
certs
crypto crypto: rename sm3-256 to sm3 in hash_algo_name 2020-02-28 17:22:26 +01:00
Documentation dt-bindings: net: FMan erratum A050385 2020-04-01 11:01:52 +02:00
drivers IB/rdmavt: Free kernel completion queue when done 2020-04-01 11:01:57 +02:00
fs nfs: add minor version to nfs_server_key for fscache 2020-04-01 11:01:50 +02:00
include Input: avoid BIT() macro usage in the serio.h UAPI header 2020-04-01 11:01:57 +02:00
init kbuild: remove header compile test 2020-03-05 16:43:47 +01:00
ipc Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()" 2020-02-28 17:22:20 +01:00
kernel cgroup1: don't call release_agent when it is "" 2020-04-01 11:01:51 +02:00
lib kbuild: move headers_check rule to usr/include/Makefile 2020-03-05 16:43:47 +01:00
LICENSES
mm x86/mm: split vmalloc_sync_all() 2020-03-25 08:25:58 +01:00
net mac80211: Do not send mesh HWMP PREQ if HWMP is disabled 2020-04-01 11:01:54 +02:00
samples samples/bpf: Set -fno-stack-protector when building BPF programs 2020-02-24 08:36:36 +01:00
scripts modpost: move the namespace field in Module.symvers last 2020-03-25 08:25:55 +01:00
security efi: Only print errors about failing to get certs if EFI vars are found 2020-03-12 13:00:14 +01:00
sound ALSA: hda/realtek: Fix pop noise on ALC225 2020-03-25 08:25:59 +01:00
tools cpupower: avoid multiple definition with gcc -fno-common 2020-04-01 11:01:51 +02:00
usr kbuild: fix 'No such file or directory' warning when cleaning 2020-03-12 13:00:09 +01:00
virt KVM: Check for a bad hva before dropping into the ghc slow path 2020-03-05 16:43:48 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 17:22:19 +01:00
Makefile Linux 5.4.28 2020-03-25 08:26:00 +01:00
README

README 

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.