linux-stable.git/drivers, branch v5.4.44

bonding: Fix reference count leak in bond_sysfs_slave_add.

2020-06-03T06:21:38+00:00

commit a068aab42258e25094bc2c159948d263ed7d7a77 upstream.

kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object. Previous
commit "b8eb718348b8" fixed a similar problem.

Fixes: 07699f9a7c8d ("bonding: add sysfs /slave dir for bond slave devices.")
Signed-off-by: Qiushi Wu 
Acked-by: Jay Vosburgh 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

crypto: chelsio/chtls: properly set tp->lsndtime

2020-06-03T06:21:36+00:00

commit a4976a3ef844c510ae9120290b23e9f3f47d6bce upstream.

TCP tp->lsndtime unit/base is tcp_jiffies32, not tcp_time_stamp()

Fixes: 36bedb3f2e5b ("crypto: chtls - Inline TLS record Tx")
Signed-off-by: Eric Dumazet 
Cc: Ayush Sawal 
Cc: Vinay Kumar Yadav 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

qlcnic: fix missing release in qlcnic_83xx_interrupt_test.

2020-06-03T06:21:36+00:00

commit 15c973858903009e995b2037683de29dfe968621 upstream.

In function qlcnic_83xx_interrupt_test(), function
qlcnic_83xx_diag_alloc_res() is not handled by function
qlcnic_83xx_diag_free_res() after a call of the function
qlcnic_alloc_mbx_args() failed. Fix this issue by adding
a jump target "fail_mbx_args", and jump to this new target
when qlcnic_alloc_mbx_args() failed.

Fixes: b6b4316c8b2f ("qlcnic: Handle qlcnic_alloc_mbx_args() failure")
Signed-off-by: Qiushi Wu 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

bnxt_en: Fix accumulation of bp->net_stats_prev.

2020-06-03T06:21:36+00:00

commit b8056e8434b037fdab08158fea99ed7bc8ef3a74 upstream.

We have logic to maintain network counters across resets by storing
the counters in bp->net_stats_prev before reset.  But not all resets
will clear the counters.  Certain resets that don't need to change
the number of rings do not clear the counters.  The current logic
accumulates the counters before all resets, causing big jumps in
the counters after some resets, such as ethtool -G.

Fix it by only accumulating the counters during reset if the irq_re_init
parameter is set.  The parameter signifies that all rings and interrupts
will be reset and that means that the counters will also be reset.

Reported-by: Vijayendra Suman 
Fixes: b8875ca356f1 ("bnxt_en: Save ring statistics before reset.")
Signed-off-by: Michael Chan 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

iommu: Fix reference count leak in iommu_group_alloc.

2020-06-03T06:21:28+00:00

[ Upstream commit 7cc31613734c4870ae32f5265d576ef296621343 ]

kobject_init_and_add() takes reference even when it fails.
Thus, when kobject_init_and_add() returns an error,
kobject_put() must be called to properly clean up the kobject.

Fixes: d72e31c93746 ("iommu: IOMMU Groups")
Signed-off-by: Qiushi Wu 
Link: https://lore.kernel.org/r/20200527210020.6522-1-wu000273@umn.edu
Signed-off-by: Joerg Roedel 
Signed-off-by: Sasha Levin

gpio: fix locking open drain IRQ lines

2020-06-03T06:21:28+00:00

[ Upstream commit e9bdf7e655b9ee81ee912fae1d59df48ce7311b6 ]

We provided the right semantics on open drain lines being
by definition output but incidentally the irq set up function
would only allow IRQs on lines that were "not output".

Fix the semantics to allow output open drain lines to be used
for IRQs.

Reported-by: Hans Verkuil 
Signed-off-by: Linus Walleij 
Signed-off-by: Hans Verkuil 
Tested-by: Hans Verkuil 
Cc: Russell King 
Cc: stable@vger.kernel.org # v5.3+
Link: https://lore.kernel.org/r/20200527140758.162280-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij 
Signed-off-by: Sasha Levin

IB/ipoib: Fix double free of skb in case of multicast traffic in CM mode

2020-06-03T06:21:26+00:00

[ Upstream commit 1acba6a817852d4aa7916d5c4f2c82f702ee9224 ]

When connected mode is set, and we have connected and datagram traffic in
parallel, ipoib might crash with double free of datagram skb.

The current mechanism assumes that the order in the completion queue is
the same as the order of sent packets for all QPs. Order is kept only for
specific QP, in case of mixed UD and CM traffic we have few QPs (one UD and
few CM's) in parallel.

The problem:
----------------------------------------------------------

Transmit queue:
-----------------
UD skb pointer kept in queue itself, CM skb kept in spearate queue and
uses transmit queue as a placeholder to count the number of total
transmitted packets.

0   1   2   3   4  5  6  7  8   9  10  11 12 13 .........127
------------------------------------------------------------
NL ud1 UD2 CM1 ud3 cm2 cm3 ud4 cm4 ud5 NL NL NL ...........
------------------------------------------------------------
    ^                                  ^
   tail                               head

Completion queue (problematic scenario) - the order not the same as in
the transmit queue:

  1  2  3  4  5  6  7  8  9
------------------------------------
 ud1 CM1 UD2 ud3 cm2 cm3 ud4 cm4 ud5
------------------------------------

1. CM1 'wc' processing
   - skb freed in cm separate ring.
   - tx_tail of transmit queue increased although UD2 is not freed.
     Now driver assumes UD2 index is already freed and it could be used for
     new transmitted skb.

0   1   2   3   4  5  6  7  8   9  10  11 12 13 .........127
------------------------------------------------------------
NL NL  UD2 CM1 ud3 cm2 cm3 ud4 cm4 ud5 NL NL NL ...........
------------------------------------------------------------
        ^   ^                       ^
      (Bad)tail                    head
(Bad - Could be used for new SKB)

In this case (due to heavy load) UD2 skb pointer could be replaced by new
transmitted packet UD_NEW, as the driver assumes its free.  At this point
we will have to process two 'wc' with same index but we have only one
pointer to free.

During second attempt to free the same skb we will have NULL pointer
exception.

2. UD2 'wc' processing
   - skb freed according the index we got from 'wc', but it was already
     overwritten by mistake. So actually the skb that was released is the
     skb of the new transmitted packet and not the original one.

3. UD_NEW 'wc' processing
   - attempt to free already freed skb. NUll pointer exception.

The fix:
-----------------------------------------------------------------------

The fix is to stop using the UD ring as a placeholder for CM packets, the
cyclic ring variables tx_head and tx_tail will manage the UD tx_ring, a
new cyclic variables global_tx_head and global_tx_tail are introduced for
managing and counting the overall outstanding sent packets, then the send
queue will be stopped and waken based on these variables only.

Note that no locking is needed since global_tx_head is updated in the xmit
flow and global_tx_tail is updated in the NAPI flow only.  A previous
attempt tried to use one variable to count the outstanding sent packets,
but it did not work since xmit and NAPI flows can run at the same time and
the counter will be updated wrongly. Thus, we use the same simple cyclic
head and tail scheme that we have today for the UD tx_ring.

Fixes: 2c104ea68350 ("IB/ipoib: Get rid of the tx_outstanding variable in all modes")
Link: https://lore.kernel.org/r/20200527134705.480068-1-leon@kernel.org
Signed-off-by: Valentine Fatiev 
Signed-off-by: Alaa Hleihel 
Signed-off-by: Leon Romanovsky 
Acked-by: Doug Ledford 
Signed-off-by: Jason Gunthorpe 
Signed-off-by: Sasha Levin

drm/amd/display: drop cursor position check in atomic test

2020-06-03T06:21:25+00:00

[ Upstream commit f7d5991b92ff824798693ddf231cf814c9d5a88b ]

get_cursor_position already handles the case where the cursor has
negative off-screen coordinates by not setting
dc_cursor_position.enabled.

Signed-off-by: Simon Ser 
Fixes: 626bf90fe03f ("drm/amd/display: add basic atomic check for cursor plane")
Cc: Alex Deucher 
Cc: Nicholas Kazlauskas 
Signed-off-by: Alex Deucher 
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin

RDMA/core: Fix double destruction of uobject

2020-06-03T06:21:25+00:00

[ Upstream commit c85f4abe66bea0b5db8d28d55da760c4fe0a0301 ]

Fix use after free when user user space request uobject concurrently for
the same object, within the RCU grace period.

In that case, remove_handle_idr_uobject() is called twice and we will have
an extra put on the uobject which cause use after free.  Fix it by leaving
the uobject write locked after it was removed from the idr.

Call to rdma_lookup_put_uobject with UVERBS_LOOKUP_DESTROY instead of
UVERBS_LOOKUP_WRITE will do the work.

  refcount_t: underflow; use-after-free.
  WARNING: CPU: 0 PID: 1381 at lib/refcount.c:28 refcount_warn_saturate+0xfe/0x1a0
  Kernel panic - not syncing: panic_on_warn set ...
  CPU: 0 PID: 1381 Comm: syz-executor.0 Not tainted 5.5.0-rc3 #8
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
  Call Trace:
   dump_stack+0x94/0xce
   panic+0x234/0x56f
   __warn+0x1cc/0x1e1
   report_bug+0x200/0x310
   fixup_bug.part.11+0x32/0x80
   do_error_trap+0xd3/0x100
   do_invalid_op+0x31/0x40
   invalid_op+0x1e/0x30
  RIP: 0010:refcount_warn_saturate+0xfe/0x1a0
  Code: 0f 0b eb 9b e8 23 f6 6d ff 80 3d 6c d4 19 03 00 75 8d e8 15 f6 6d ff 48 c7 c7 c0 02 55 bd c6 05 57 d4 19 03 01 e8 a2 58 49 ff <0f> 0b e9 6e ff ff ff e8 f6 f5 6d ff 80 3d 42 d4 19 03 00 0f 85 5c
  RSP: 0018:ffffc90002df7b98 EFLAGS: 00010282
  RAX: 0000000000000000 RBX: ffff88810f6a193c RCX: ffffffffba649009
  RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88811b0283cc
  RBP: 0000000000000003 R08: ffffed10236060e3 R09: ffffed10236060e3
  R10: 0000000000000001 R11: ffffed10236060e2 R12: ffff88810f6a193c
  R13: ffffc90002df7d60 R14: 0000000000000000 R15: ffff888116ae6a08
   uverbs_uobject_put+0xfd/0x140
   __uobj_perform_destroy+0x3d/0x60
   ib_uverbs_close_xrcd+0x148/0x170
   ib_uverbs_write+0xaa5/0xdf0
   __vfs_write+0x7c/0x100
   vfs_write+0x168/0x4a0
   ksys_write+0xc8/0x200
   do_syscall_64+0x9c/0x390
   entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x465b49
  Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
  RSP: 002b:00007f759d122c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
  RAX: ffffffffffffffda RBX: 000000000073bfa8 RCX: 0000000000465b49
  RDX: 000000000000000c RSI: 0000000020000080 RDI: 0000000000000003
  RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000246 R12: 00007f759d1236bc
  R13: 00000000004ca27c R14: 000000000070de40 R15: 00000000ffffffff
  Dumping ftrace buffer:
     (ftrace buffer empty)
  Kernel Offset: 0x39400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

Fixes: 7452a3c745a2 ("IB/uverbs: Allow RDMA_REMOVE_DESTROY to work concurrently with disassociate")
Link: https://lore.kernel.org/r/20200527135534.482279-1-leon@kernel.org
Signed-off-by: Maor Gottlieb 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe 
Signed-off-by: Sasha Levin

clk: qcom: gcc: Fix parent for gpll0_out_even

2020-06-03T06:21:23+00:00

[ Upstream commit a76f274182f054481182c81cd62bb8794a5450a6 ]

Documentation says that gpll0 is parent of gpll0_out_even, somehow
driver coded that as bi_tcxo, so fix it

Fixes: 2a1d7eb854bb ("clk: qcom: gcc: Add global clock controller driver for SM8150")
Reported-by: Jonathan Marek 
Signed-off-by: Vinod Koul 
Link: https://lkml.kernel.org/r/20200521052728.2141377-1-vkoul@kernel.org
Reviewed-by: Bjorn Andersson 
Signed-off-by: Stephen Boyd 
Signed-off-by: Sasha Levin