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  1. 10 Jan, 2020 1 commit
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · 5e7c1b75
      Linus Torvalds authored 
      Pull rdma fixes from Jason Gunthorpe:
 "First RDMA subsystem updates for 5.5-rc. A very small set of fixes,
  most people seem to still be recovering from December!

  Five small driver fixes:

   - Fix error flow with MR allocation in bnxt_re

   - An errata work around for bnxt_re

   - Misuse of the workqueue API in hfi1

   - Protocol error in hfi1

   - Regression in 5.5 related to the mmap rework with i40iw"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  i40iw: Remove setting of VMA private data and use rdma_user_mmap_io
  IB/hfi1: Adjust flow PSN with the correct resync_psn
  IB/hfi1: Don't cancel unused work item
  RDMA/bnxt_re: Fix Send Work Entry state check while polling completions
  RDMA/bnxt_re: Avoid freeing MR resources if dereg fails
      5e7c1b75
  3. 09 Jan, 2020 6 commits
    • Linus Torvalds's avatar
      Merge tag 'gpio-v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · 4a3033ef
      Linus Torvalds authored 
      Pull GPIO fixes from Linus Walleij:
 "Here is a host of GPIO fixes for the v5.5 series. The ACPI fix is
  especially important, see summary below and in the commit for details:

   - Select GPIOLIB_IRQCHIP on the max77620 GPIO expander

   - Fix context restore in the Zynq driver

   - Create a new ACPI quirk handler for disabling wakeups on
     problematic hardware.

   - Fix a coding style issue on the mockup device"

* tag 'gpio-v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism
  gpiolib: acpi: Turn dmi_system_id table into a generic quirk table
  gpio: zynq: Fix for bug in zynq_gpio_restore_context API
  gpio: max77620: Add missing dependency on GPIOLIB_IRQCHIP
  gpio: mockup: fix coding style
      4a3033ef
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v5.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · a6a55b52
      Linus Torvalds authored 
      Pull pin control fixes from Linus Walleij:
 "Two fixes for pin control, not much to say about it, it's just regular
  driver fixes:

   - Fix erroneous shift in the Meson driver

   - Make Lochnagar select the GPIOLIB Kconfig symbol"

* tag 'pinctrl-v5.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: meson: Fix wrong shift value when get drive-strength
  pinctrl: lochnagar: select GPIOLIB
      a6a55b52
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · b5b3159c
      Linus Torvalds authored 
      Pull input fixes from Dmitry Torokhov:
 "Just a few small fixups here"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: imx_sc_key - only take the valid data from SCU firmware as key state
  Input: add safety guards to input_set_keycode()
  Input: input_event - fix struct padding on sparc64
  Input: uinput - always report EPOLLOUT
      b5b3159c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid · e69ec487
      Linus Torvalds authored 
      Pull HID fixes from Jiri Kosina:

 - fix for OOB in hiddev, from Dmitry Torokhov

 - _poll API fixes for hidraw, from Marcel Holtmann

 - functional fix for Steam driver, from Rodrigo Rivas Costa

 - a few new device IDs / device-specific quirks and other assorted
   smaller fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: steam: Fix input device disappearing
  HID: intel-ish-hid: ipc: Add Tiger Lake PCI device ID
  drivers/hid/hid-multitouch.c: fix a possible null pointer access.
  HID: wacom: Recognize new MobileStudio Pro PID
  HID: intel-ish-hid: ipc: add CMP device id
  HID: hiddev: fix mess in hiddev_open()
  HID: hid-input: clear unmapped usages
  HID: Add quirk for incorrect input length on Lenovo Y720
  HID: asus: Ignore Asus vendor-page usage-code 0xff events
  HID: ite: Add USB id match for Acer SW5-012 keyboard dock
  HID: Add quirk for Xin-Mo Dual Controller
  HID: Fix slab-out-of-bounds read in hid_field_extract
  HID: multitouch: Add LG MELF0410 I2C touchscreen support
  HID: uhid: Fix returning EPOLLOUT from uhid_char_poll
  HID: hidraw: Fix returning EPOLLOUT from hidraw_poll
      e69ec487
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · a5f48c78
      Linus Torvalds authored 
      Pull networking fixes from David Miller:

 1) Missing netns pointer init in arp_tables, from Florian Westphal.

 2) Fix normal tcp SACK being treated as D-SACK, from Pengcheng Yang.

 3) Fix divide by zero in sch_cake, from Wen Yang.

 4) Len passed to skb_put_padto() is wrong in qrtr code, from Carl
    Huang.

 5) cmd->obj.chunk is leaked in sctp code error paths, from Xin Long.

 6) cgroup bpf programs can be released out of order, fix from Roman
    Gushchin.

 7) Make sure stmmac debugfs entry name is changed when device name
    changes, from Jiping Ma.

 8) Fix memory leak in vlan_dev_set_egress_priority(), from Eric
    Dumazet.

 9) SKB leak in lan78xx usb driver, also from Eric Dumazet.

10) Ridiculous TCA_FQ_QUANTUM values configured can cause loops in fq
    packet scheduler, reject them. From Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
  tipc: fix wrong connect() return code
  tipc: fix link overflow issue at socket shutdown
  netfilter: ipset: avoid null deref when IPSET_ATTR_LINENO is present
  netfilter: conntrack: dccp, sctp: handle null timeout argument
  atm: eni: fix uninitialized variable warning
  macvlan: do not assume mac_header is set in macvlan_broadcast()
  net: sch_prio: When ungrafting, replace with FIFO
  mlxsw: spectrum_qdisc: Ignore grafting of invisible FIFO
  MAINTAINERS: Remove myself as co-maintainer for qcom-ethqos
  gtp: fix bad unlock balance in gtp_encap_enable_socket
  pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM
  tipc: remove meaningless assignment in Makefile
  tipc: do not add socket.o to tipc-y twice
  net: stmmac: dwmac-sun8i: Allow all RGMII modes
  net: stmmac: dwmac-sunxi: Allow all RGMII modes
  net: usb: lan78xx: fix possible skb leak
  net: stmmac: Fixed link does not need MDIO Bus
  vlan: vlan_changelink() should propagate errors
  vlan: fix memory leak in vlan_dev_set_egress_priority
  stmmac: debugfs entry name is not be changed when udev rename device name.
  ...
      a5f48c78
    • Rodrigo Rivas Costa's avatar
      HID: steam: Fix input device disappearing · 20eee6e5
      Rodrigo Rivas Costa authored 
      The `connected` value for wired devices was not properly initialized,
it must be set to `true` upon creation, because wired devices do not
generate connection events.

When a raw client (the Steam Client) uses the device, the input device
is destroyed. Then, when the raw client finishes, it must be recreated.
But since the `connected` variable was false this never happended.
Signed-off-by: default avatarRodrigo Rivas Costa <rodrigorivascosta@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      20eee6e5
  5. 08 Jan, 2020 19 commits
    • Tuong Lien's avatar
      tipc: fix wrong connect() return code · 9546a0b7
      Tuong Lien authored 
      The current 'tipc_wait_for_connect()' function does a wait-loop for the
condition 'sk->sk_state != TIPC_CONNECTING' to conclude if the socket
connecting has done. However, when the condition is met, it returns '0'
even in the case the connecting is actually failed, the socket state is
set to 'TIPC_DISCONNECTING' (e.g. when the server socket has closed..).
This results in a wrong return code for the 'connect()' call from user,
making it believe that the connection is established and go ahead with
building, sending a message, etc. but finally failed e.g. '-EPIPE'.

This commit fixes the issue by changing the wait condition to the
'tipc_sk_connected(sk)', so the function will return '0' only when the
connection is really established. Otherwise, either the socket 'sk_err'
if any or '-ETIMEDOUT'/'-EINTR' will be returned correspondingly.
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Acked-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarTuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9546a0b7
    • Tuong Lien's avatar
      tipc: fix link overflow issue at socket shutdown · 49afb806
      Tuong Lien authored 
      When a socket is suddenly shutdown or released, it will reject all the
unreceived messages in its receive queue. This applies to a connected
socket too, whereas there is only one 'FIN' message required to be sent
back to its peer in this case.

In case there are many messages in the queue and/or some connections
with such messages are shutdown at the same time, the link layer will
easily get overflowed at the 'TIPC_SYSTEM_IMPORTANCE' backlog level
because of the message rejections. As a result, the link will be taken
down. Moreover, immediately when the link is re-established, the socket
layer can continue to reject the messages and the same issue happens...

The commit refactors the '__tipc_shutdown()' function to only send one
'FIN' in the situation mentioned above. For the connectionless case, it
is unavoidable but usually there is no rejections for such socket
messages because they are 'dest-droppable' by default.

In addition, the new code makes the other socket states clear
(e.g.'TIPC_LISTEN') and treats as a separate case to avoid misbehaving.
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Acked-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarTuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      49afb806
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf · b73a6561
      David S. Miller authored 
      Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Missing netns context in arp_tables, from Florian Westphal.

2) Underflow in flowtable reference counter, from wenxu.

3) Fix incorrect ethernet destination address in flowtable offload,
   from wenxu.

4) Check for status of neighbour entry, from wenxu.

5) Fix NAT port mangling, from wenxu.

6) Unbind callbacks from destroy path to cleanup hardware properly
   on flowtable removal.

7) Fix missing casting statistics timestamp, add nf_flowtable_time_stamp
   and use it.

8) NULL pointer exception when timeout argument is null in conntrack
   dccp and sctp protocol helpers, from Florian Westphal.

9) Possible nul-dereference in ipset with IPSET_ATTR_LINENO, also from
   Florian.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b73a6561
    • Florian Westphal's avatar
      netfilter: ipset: avoid null deref when IPSET_ATTR_LINENO is present · 22dad713
      Florian Westphal authored 
      The set uadt functions assume lineno is never NULL, but it is in
case of ip_set_utest().

syzkaller managed to generate a netlink message that calls this with
LINENO attr present:

general protection fault: 0000 [#1] PREEMPT SMP KASAN
RIP: 0010:hash_mac4_uadt+0x1bc/0x470 net/netfilter/ipset/ip_set_hash_mac.c:104
Call Trace:
 ip_set_utest+0x55b/0x890 net/netfilter/ipset/ip_set_core.c:1867
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563

pass a dummy lineno storage, its easier than patching all set
implementations.

This seems to be a day-0 bug.

Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Reported-by: syzbot+34bd2369d38707f3f4a7@syzkaller.appspotmail.com
Fixes: a7b4f989 ("netfilter: ipset: IP set core support")
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Acked-by: default avatarJozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      22dad713
    • Florian Westphal's avatar
      netfilter: conntrack: dccp, sctp: handle null timeout argument · 1d9a7acd
      Florian Westphal authored 
      The timeout pointer can be NULL which means we should modify the
per-nets timeout instead.

All do this, except sctp and dccp which instead give:

general protection fault: 0000 [#1] PREEMPT SMP KASAN
net/netfilter/nf_conntrack_proto_dccp.c:682
 ctnl_timeout_parse_policy+0x150/0x1d0 net/netfilter/nfnetlink_cttimeout.c:67
 cttimeout_default_set+0x150/0x1c0 net/netfilter/nfnetlink_cttimeout.c:368
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477

Reported-by: syzbot+46a4ad33f345d1dd346e@syzkaller.appspotmail.com
Fixes: c779e849 ("netfilter: conntrack: remove get_timeout() indirection")
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      1d9a7acd
    • Arnd Bergmann's avatar
      atm: eni: fix uninitialized variable warning · 30780d08
      Arnd Bergmann authored 
      With -O3, gcc has found an actual unintialized variable stored
into an mmio register in two instances:

drivers/atm/eni.c: In function 'discard':
drivers/atm/eni.c:465:13: error: 'dma[1]' is used uninitialized in this function [-Werror=uninitialized]
   writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
             ^
drivers/atm/eni.c:465:13: error: 'dma[3]' is used uninitialized in this function [-Werror=uninitialized]

Change the code to always write zeroes instead.
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      30780d08
    • Eric Dumazet's avatar
      macvlan: do not assume mac_header is set in macvlan_broadcast() · 96cc4b69
      Eric Dumazet authored 
      Use of eth_hdr() in tx path is error prone.

Many drivers call skb_reset_mac_header() before using it,
but others do not.

Commit 6d1ccff6 ("net: reset mac header in dev_start_xmit()")
attempted to fix this generically, but commit d346a3fa
("packet: introduce PACKET_QDISC_BYPASS socket option") brought
back the macvlan bug.

Lets add a new helper, so that tx paths no longer have
to call skb_reset_mac_header() only to get a pointer
to skb->data.

Hopefully we will be able to revert 6d1ccff6
("net: reset mac header in dev_start_xmit()") and save few cycles
in transmit fast path.

BUG: KASAN: use-after-free in __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline]
BUG: KASAN: use-after-free in mc_hash drivers/net/macvlan.c:251 [inline]
BUG: KASAN: use-after-free in macvlan_broadcast+0x547/0x620 drivers/net/macvlan.c:277
Read of size 4 at addr ffff8880a4932401 by task syz-executor947/9579

CPU: 0 PID: 9579 Comm: syz-executor947 Not tainted 5.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/generic_report.c:145
 __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline]
 mc_hash drivers/net/macvlan.c:251 [inline]
 macvlan_broadcast+0x547/0x620 drivers/net/macvlan.c:277
 macvlan_queue_xmit drivers/net/macvlan.c:520 [inline]
 macvlan_start_xmit+0x402/0x77f drivers/net/macvlan.c:559
 __netdev_start_xmit include/linux/netdevice.h:4447 [inline]
 netdev_start_xmit include/linux/netdevice.h:4461 [inline]
 dev_direct_xmit+0x419/0x630 net/core/dev.c:4079
 packet_direct_xmit+0x1a9/0x250 net/packet/af_packet.c:240
 packet_snd net/packet/af_packet.c:2966 [inline]
 packet_sendmsg+0x260d/0x6220 net/packet/af_packet.c:2991
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:659
 __sys_sendto+0x262/0x380 net/socket.c:1985
 __do_sys_sendto net/socket.c:1997 [inline]
 __se_sys_sendto net/socket.c:1993 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1993
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x442639
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc13549e08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442639
RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000403bb0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 9389:
 save_stack+0x23/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527
 __do_kmalloc mm/slab.c:3656 [inline]
 __kmalloc+0x163/0x770 mm/slab.c:3665
 kmalloc include/linux/slab.h:561 [inline]
 tomoyo_realpath_from_path+0xc5/0x660 security/tomoyo/realpath.c:252
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x230/0x430 security/tomoyo/file.c:822
 tomoyo_inode_getattr+0x1d/0x30 security/tomoyo/tomoyo.c:129
 security_inode_getattr+0xf2/0x150 security/security.c:1222
 vfs_getattr+0x25/0x70 fs/stat.c:115
 vfs_statx_fd+0x71/0xc0 fs/stat.c:145
 vfs_fstat include/linux/fs.h:3265 [inline]
 __do_sys_newfstat+0x9b/0x120 fs/stat.c:378
 __se_sys_newfstat fs/stat.c:375 [inline]
 __x64_sys_newfstat+0x54/0x80 fs/stat.c:375
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9389:
 save_stack+0x23/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:335 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10a/0x2c0 mm/slab.c:3757
 tomoyo_realpath_from_path+0x1a7/0x660 security/tomoyo/realpath.c:289
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x230/0x430 security/tomoyo/file.c:822
 tomoyo_inode_getattr+0x1d/0x30 security/tomoyo/tomoyo.c:129
 security_inode_getattr+0xf2/0x150 security/security.c:1222
 vfs_getattr+0x25/0x70 fs/stat.c:115
 vfs_statx_fd+0x71/0xc0 fs/stat.c:145
 vfs_fstat include/linux/fs.h:3265 [inline]
 __do_sys_newfstat+0x9b/0x120 fs/stat.c:378
 __se_sys_newfstat fs/stat.c:375 [inline]
 __x64_sys_newfstat+0x54/0x80 fs/stat.c:375
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880a4932000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 1025 bytes inside of
 4096-byte region [ffff8880a4932000, ffff8880a4933000)
The buggy address belongs to the page:
page:ffffea0002924c80 refcount:1 mapcount:0 mapping:ffff8880aa402000 index:0x0 compound_mapcount: 0
raw: 00fffe0000010200 ffffea0002846208 ffffea00028f3888 ffff8880aa402000
raw: 0000000000000000 ffff8880a4932000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a4932300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a4932380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880a4932400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8880a4932480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a4932500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb

Fixes: b863ceb7 ("[NET]: Add macvlan driver")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      96cc4b69
    • David S. Miller's avatar
      Merge branch 'net-ungraft-prio' · 2f806c2a
      David S. Miller authored 
      Petr Machata says:

====================
When ungrafting from PRIO, replace child with FIFO

When a child Qdisc is removed from one of the PRIO Qdisc's bands, it is
replaced unconditionally by a NOOP qdisc. As a result, any traffic hitting
that band gets dropped. That is incorrect--no Qdisc was explicitly added
when PRIO was created, and after removal, none should have to be added
either.

In patch #2, this problem is fixed for PRIO by first attempting to create a
default Qdisc and only falling back to noop when that fails. This pattern
of attempting to create an invisible FIFO, using NOOP only as a fallback,
is also seen in some other Qdiscs.

The only driver currently offloading PRIO (and thus presumably the only one
impacted by this) is mlxsw. Therefore patch #1 extends mlxsw to handle the
replacement by an invisible FIFO gracefully.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2f806c2a
    • Petr Machata's avatar
      net: sch_prio: When ungrafting, replace with FIFO · 240ce7f6
      Petr Machata authored 
      When a child Qdisc is removed from one of the PRIO Qdisc's bands, it is
replaced unconditionally by a NOOP qdisc. As a result, any traffic hitting
that band gets dropped. That is incorrect--no Qdisc was explicitly added
when PRIO was created, and after removal, none should have to be added
either.

Fix PRIO by first attempting to create a default Qdisc and only falling
back to noop when that fails. This pattern of attempting to create an
invisible FIFO, using NOOP only as a fallback, is also seen in other
Qdiscs.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      240ce7f6
    • Petr Machata's avatar
      mlxsw: spectrum_qdisc: Ignore grafting of invisible FIFO · 3971a535
      Petr Machata authored 
      The following patch will change PRIO to replace a removed Qdisc with an
invisible FIFO, instead of NOOP. mlxsw will see this replacement due to the
graft message that is generated. But because FIFO does not issue its own
REPLACE message, when the graft operation takes place, the Qdisc that mlxsw
tracks under the indicated band is still the old one. The child
handle (0:0) therefore does not match, and mlxsw rejects the graft
operation, which leads to an extack message:

    Warning: Offloading graft operation failed.

Fix by ignoring the invisible children in the PRIO graft handler. The
DESTROY message of the removed Qdisc is going to follow shortly and handle
the removal.

Fixes: 32dc5efc ("mlxsw: spectrum: qdiscs: prio: Handle graft command")
Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3971a535
    • Niklas Cassel's avatar
      MAINTAINERS: Remove myself as co-maintainer for qcom-ethqos · cb6f74a1
      Niklas Cassel authored 
      As I am no longer with Linaro, I no longer have access to documentation
for this IP. The Linaro email will start bouncing soon.

Vinod is fully capable to maintain this driver by himself, therefore
remove myself as co-maintainer for qcom-ethqos.
Signed-off-by: default avatarNiklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cb6f74a1
    • Eric Dumazet's avatar
      gtp: fix bad unlock balance in gtp_encap_enable_socket · 90d72256
      Eric Dumazet authored 
      WARNING: bad unlock balance detected!
5.5.0-rc5-syzkaller #0 Not tainted
-------------------------------------
syz-executor921/9688 is trying to release lock (sk_lock-AF_INET6) at:
[<ffffffff84bf8506>] gtp_encap_enable_socket+0x146/0x400 drivers/net/gtp.c:830
but there are no more locks to release!

other info that might help us debug this:
2 locks held by syz-executor921/9688:
 #0: ffffffff8a4d8840 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8a4d8840 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x405/0xaf0 net/core/rtnetlink.c:5421
 #1: ffff88809304b560 (slock-AF_INET6){+...}, at: spin_lock_bh include/linux/spinlock.h:343 [inline]
 #1: ffff88809304b560 (slock-AF_INET6){+...}, at: release_sock+0x20/0x1c0 net/core/sock.c:2951

stack backtrace:
CPU: 0 PID: 9688 Comm: syz-executor921 Not tainted 5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_unlock_imbalance_bug kernel/locking/lockdep.c:4008 [inline]
 print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3984
 __lock_release kernel/locking/lockdep.c:4242 [inline]
 lock_release+0x5f2/0x960 kernel/locking/lockdep.c:4503
 sock_release_ownership include/net/sock.h:1496 [inline]
 release_sock+0x17c/0x1c0 net/core/sock.c:2961
 gtp_encap_enable_socket+0x146/0x400 drivers/net/gtp.c:830
 gtp_encap_enable drivers/net/gtp.c:852 [inline]
 gtp_newlink+0x9fc/0xc60 drivers/net/gtp.c:666
 __rtnl_newlink+0x109e/0x1790 net/core/rtnetlink.c:3305
 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3363
 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5424
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:659
 ____sys_sendmsg+0x753/0x880 net/socket.c:2330
 ___sys_sendmsg+0x100/0x170 net/socket.c:2384
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg net/socket.c:2424 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445d49
Code: e8 bc b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8019074db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445d49
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000006dac30 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00000000006dac3c
R13: 00007ffea687f6bf R14: 00007f80190759c0 R15: 20c49ba5e353f7cf

Fixes: e198987e ("gtp: fix suspicious RCU usage")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
Cc: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      90d72256
    • Eric Dumazet's avatar
      pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM · d9e15a27
      Eric Dumazet authored 
      As diagnosed by Florian :

If TCA_FQ_QUANTUM is set to 0x80000000, fq_deueue()
can loop forever in :

if (f->credit <= 0) {
  f->credit += q->quantum;
  goto begin;
}

... because f->credit is either 0 or -2147483648.

Let's limit TCA_FQ_QUANTUM to no more than 1 << 20 :
This max value should limit risks of breaking user setups
while fixing this bug.

Fixes: afe4fd06 ("pkt_sched: fq: Fair Queue packet scheduler")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Diagnosed-by: default avatarFlorian Westphal <fw@strlen.de>
Reported-by: syzbot+dc9071cc5a85950bdfce@syzkaller.appspotmail.com
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d9e15a27
    • Masahiro Yamada's avatar
      tipc: remove meaningless assignment in Makefile · b969fee1
      Masahiro Yamada authored 
      There is no module named tipc_diag.

The assignment to tipc_diag-y has no effect.
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b969fee1
    • Masahiro Yamada's avatar
      tipc: do not add socket.o to tipc-y twice · ea04b445
      Masahiro Yamada authored 
      net/tipc/Makefile adds socket.o twice.

tipc-y	+= addr.o bcast.o bearer.o \
           core.o link.o discover.o msg.o  \
           name_distr.o  subscr.o monitor.o name_table.o net.o  \
           netlink.o netlink_compat.o node.o socket.o eth_media.o \
                                             ^^^^^^^^
           topsrv.o socket.o group.o trace.o
                    ^^^^^^^^
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ea04b445
    • Chen-Yu Tsai's avatar
      net: stmmac: dwmac-sun8i: Allow all RGMII modes · f1239d8a
      Chen-Yu Tsai authored 
      Allow all the RGMII modes to be used. This would allow us to represent
the hardware better in the device tree with RGMII_ID where in most
cases the PHY's internal delay for both RX and TX are used.

Fixes: 9f93ac8d ("net-next: stmmac: Add dwmac-sun8i")
Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f1239d8a
    • Chen-Yu Tsai's avatar
      net: stmmac: dwmac-sunxi: Allow all RGMII modes · 52cc73e5
      Chen-Yu Tsai authored 
      Allow all the RGMII modes to be used. This would allow us to represent
the hardware better in the device tree with RGMII_ID where in most
cases the PHY's internal delay for both RX and TX are used.

Fixes: af0bd4e9 ("net: stmmac: sunxi platform extensions for GMAC in Allwinner A20 SoC's")
Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      52cc73e5
    • Linus Torvalds's avatar
      Merge tag 'tpmdd-next-20200108' of git://git.infradead.org/users/jjs/linux-tpmdd · b07f636f
      Linus Torvalds authored 
      Pull more tpmd fixes from Jarkko Sakkinen:
 "One critical regression fix (the faulty commit got merged in rc3, but
  also marked for stable)"

* tag 'tpmdd-next-20200108' of git://git.infradead.org/users/jjs/linux-tpmdd:
  tpm: Handle negative priv->response_len in tpm_common_read()
      b07f636f
    • Tadeusz Struk's avatar
      tpm: Handle negative priv->response_len in tpm_common_read() · a430e67d
      Tadeusz Struk authored 
      The priv->response_length can hold the size of an response or an negative
error code, and the tpm_common_read() needs to handle both cases correctly.
Changed the type of response_length to signed and accounted for negative
value in tpm_common_read().

Cc: stable@vger.kernel.org
Fixes: d23d1248 ("tpm: fix invalid locking in NONBLOCKING mode")
Reported-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarTadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
      a430e67d
  7. 07 Jan, 2020 14 commits
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