1. 13 Dec, 2018 4 commits
    • Julian Wiedmann's avatar
      s390/qeth: fix length check in SNMP processing · 6ae0dc6c
      Julian Wiedmann authored
      [ Upstream commit 9a764c1e ]
      
      The response for a SNMP request can consist of multiple parts, which
      the cmd callback stages into a kernel buffer until all parts have been
      received. If the callback detects that the staging buffer provides
      insufficient space, it bails out with error.
      This processing is buggy for the first part of the response - while it
      initially checks for a length of 'data_len', it later copies an
      additional amount of 'offsetof(struct qeth_snmp_cmd, data)' bytes.
      
      Fix the calculation of 'data_len' for the first part of the response.
      This also nicely cleans up the memcpy code.
      
      Fixes: 1da177e4 ("Linux-2.6.12-rc2")
      Signed-off-by: default avatarJulian Wiedmann <jwi@linux.ibm.com>
      Reviewed-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      6ae0dc6c
    • Pan Bian's avatar
      rapidio/rionet: do not free skb before reading its length · 9ab8f8cb
      Pan Bian authored
      [ Upstream commit cfc43519 ]
      
      skb is freed via dev_kfree_skb_any, however, skb->len is read then. This
      may result in a use-after-free bug.
      
      Fixes: e6161d64 ("rapidio/rionet: rework driver initialization and removal")
      Signed-off-by: default avatarPan Bian <bianpan2016@163.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9ab8f8cb
    • Sasha Levin's avatar
      Revert "wlcore: Add missing PM call for wlcore_cmd_wait_for_event_or_timeout()" · 494fedde
      Sasha Levin authored
      This reverts commit 3fdd3464 which was
      upstream commit 4ec7cece.
      
      From Dietmar May's report on the stable mailing list
      (https://www.spinics.net/lists/stable/msg272201.html):
      
      > I've run into some problems which appear due to (a) recent patch(es) on
      > the wlcore wifi driver.
      >
      > 4.4.160 - commit 3fdd3464
      > 4.9.131 - commit afeeecc7
      >
      > Earlier versions (4.9.130 and 4.4.159 - tested back to 4.4.49) do not
      > exhibit this problem. It is still present in 4.9.141.
      >
      > master as of 4.20.0-rc4 does not exhibit this problem.
      >
      > Basically, during client association when in AP mode (running hostapd),
      > handshake may or may not complete following a noticeable delay. If
      > successful, then the driver fails consistently in warn_slowpath_null
      > during disassociation. If unsuccessful, the wifi client attempts multiple
      > times, sometimes failing repeatedly. I've had clients unable to connect
      > for 3-5 minutes during testing, with the syslog filled with dozens of
      > backtraces. syslog details are below.
      >
      > I'm working on an embedded device with a TI 3352 ARM processor and a
      > murata wl1271 module in sdio mode. We're running a fully patched ubuntu
      > 18.04 ARM build, with a kernel built from kernel.org's stable/linux repo <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.9.y&id=afeeecc764436f31d4447575bb9007732333818c>.
      > Relevant parts of the kernel config are included below.
      >
      > The commit message states:
      >
      > > /I've only seen this few times with the runtime PM patches enabled so
      > > this one is probably not needed before that. This seems to work
      > > currently based on the current PM implementation timer. Let's apply
      > > this separately though in case others are hitting this issue./
      > We're not doing anything explicit with power management. The device is an
      > IoT edge gateway with battery backup, normally running on wall power. The
      > battery is currently used solely to shut down the system cleanly to avoid
      > filesystem corruption.
      >
      > The device tree is configured to keep power in suspend; but the device
      > should never suspend, so in our case, there is no need to call
      > wl1271_ps_elp_wakeup() or wl1271_ps_elp_sleep(), as occurs in the patch.
      Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      494fedde
    • Matthias Schwarzott's avatar
      media: em28xx: Fix use-after-free when disconnecting · 4de120cb
      Matthias Schwarzott authored
      [ Upstream commit 910b0797 ]
      
      Fix bug by moving the i2c_unregister_device calls after deregistration
      of dvb frontend.
      
      The new style i2c drivers already destroys the frontend object at
      i2c_unregister_device time.
      When the dvb frontend is unregistered afterwards it leads to this oops:
      
        [ 6058.866459] BUG: unable to handle kernel NULL pointer dereference at 00000000000001f8
        [ 6058.866578] IP: dvb_frontend_stop+0x30/0xd0 [dvb_core]
        [ 6058.866644] PGD 0
        [ 6058.866646] P4D 0
      
        [ 6058.866726] Oops: 0000 [#1] SMP
        [ 6058.866768] Modules linked in: rc_pinnacle_pctv_hd(O) em28xx_rc(O) si2157(O) si2168(O) em28xx_dvb(O) em28xx(O) si2165(O) a8293(O) tda10071(O) tea5767(O) tuner(O) cx23885(O) tda18271(O) videobuf2_dvb(O) videobuf2_dma_sg(O) m88ds3103(O) tveeprom(O) cx2341x(O) v4l2_common(O) dvb_core(O) rc_core(O) videobuf2_memops(O) videobuf2_v4l2(O) videobuf2_core(O) videodev(O) media(O) bluetooth ecdh_generic ums_realtek uas rtl8192cu rtl_usb rtl8192c_common rtlwifi usb_storage snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic i2c_mux snd_hda_intel snd_hda_codec snd_hwdep x86_pkg_temp_thermal snd_hda_core kvm_intel kvm irqbypass [last unloaded: videobuf2_memops]
        [ 6058.867497] CPU: 2 PID: 7349 Comm: kworker/2:0 Tainted: G        W  O    4.13.9-gentoo #1
        [ 6058.867595] Hardware name: MEDION E2050 2391/H81H3-EM2, BIOS H81EM2W08.308 08/25/2014
        [ 6058.867692] Workqueue: usb_hub_wq hub_event
        [ 6058.867746] task: ffff88011a15e040 task.stack: ffffc90003074000
        [ 6058.867825] RIP: 0010:dvb_frontend_stop+0x30/0xd0 [dvb_core]
        [ 6058.867896] RSP: 0018:ffffc90003077b58 EFLAGS: 00010293
        [ 6058.867964] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000010040001f
        [ 6058.868056] RDX: ffff88011a15e040 RSI: ffffea000464e400 RDI: ffff88001cbe3028
        [ 6058.868150] RBP: ffffc90003077b68 R08: ffff880119390380 R09: 000000010040001f
        [ 6058.868241] R10: ffffc90003077b18 R11: 000000000001e200 R12: ffff88001cbe3028
        [ 6058.868330] R13: ffff88001cbe68d0 R14: ffff8800cf734000 R15: ffff8800cf734098
        [ 6058.868419] FS:  0000000000000000(0000) GS:ffff88011fb00000(0000) knlGS:0000000000000000
        [ 6058.868511] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
        [ 6058.868578] CR2: 00000000000001f8 CR3: 00000001113c5000 CR4: 00000000001406e0
        [ 6058.868662] Call Trace:
        [ 6058.868705]  dvb_unregister_frontend+0x2a/0x80 [dvb_core]
        [ 6058.868774]  em28xx_dvb_fini+0x132/0x220 [em28xx_dvb]
        [ 6058.868840]  em28xx_close_extension+0x34/0x90 [em28xx]
        [ 6058.868902]  em28xx_usb_disconnect+0x4e/0x70 [em28xx]
        [ 6058.868968]  usb_unbind_interface+0x6d/0x260
        [ 6058.869025]  device_release_driver_internal+0x150/0x210
        [ 6058.869094]  device_release_driver+0xd/0x10
        [ 6058.869150]  bus_remove_device+0xe4/0x160
        [ 6058.869204]  device_del+0x1ce/0x2f0
        [ 6058.869253]  usb_disable_device+0x99/0x270
        [ 6058.869306]  usb_disconnect+0x8d/0x260
        [ 6058.869359]  hub_event+0x93d/0x1520
        [ 6058.869408]  ? dequeue_task_fair+0xae5/0xd20
        [ 6058.869467]  process_one_work+0x1d9/0x3e0
        [ 6058.869522]  worker_thread+0x43/0x3e0
        [ 6058.869576]  kthread+0x104/0x140
        [ 6058.869602]  ? trace_event_raw_event_workqueue_work+0x80/0x80
        [ 6058.869640]  ? kthread_create_on_node+0x40/0x40
        [ 6058.869673]  ret_from_fork+0x22/0x30
        [ 6058.869698] Code: 54 49 89 fc 53 48 8b 9f 18 03 00 00 0f 1f 44 00 00 41 83 bc 24 04 05 00 00 02 74 0c 41 c7 84 24 04 05 00 00 01 00 00 00 0f ae f0 <48> 8b bb f8 01 00 00 48 85 ff 74 5c e8 df 40 f0 e0 48 8b 93 f8
        [ 6058.869850] RIP: dvb_frontend_stop+0x30/0xd0 [dvb_core] RSP: ffffc90003077b58
        [ 6058.869894] CR2: 00000000000001f8
        [ 6058.875880] ---[ end trace 717eecf7193b3fc6 ]---
      Signed-off-by: default avatarMatthias Schwarzott <zzam@gentoo.org>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4de120cb
  2. 01 Dec, 2018 36 commits