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  1. 10 Jan, 2019 9 commits
  3. 09 Jan, 2019 19 commits
  5. 08 Jan, 2019 10 commits
    • Amadeusz Sławiński's avatar
      ALSA: usb-audio: fix CM6206 register definitions · f5c9571e
      Amadeusz Sławiński authored 
      fix typo after a recent commit causing headphones to have no sound

Fixes: ad43d528 (ALSA: usb-audio: Define registers for CM6206)
Signed-off-by: default avatarAmadeusz Sławiński <amade@asmblr.net>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      f5c9571e
    • David Herrmann's avatar
      fork: record start_time late · 7b558513
      David Herrmann authored 
      This changes the fork(2) syscall to record the process start_time after
initializing the basic task structure but still before making the new
process visible to user-space.

Technically, we could record the start_time anytime during fork(2).  But
this might lead to scenarios where a start_time is recorded long before
a process becomes visible to user-space.  For instance, with
userfaultfd(2) and TLS, user-space can delay the execution of fork(2)
for an indefinite amount of time (and will, if this causes network
access, or similar).

By recording the start_time late, it much closer reflects the point in
time where the process becomes live and can be observed by other
processes.

Lastly, this makes it much harder for user-space to predict and control
the start_time they get assigned.  Previously, user-space could fork a
process and stall it in copy_thread_tls() before its pid is allocated,
but after its start_time is recorded.  This can be misused to later-on
cycle through PIDs and resume the stalled fork(2) yielding a process
that has the same pid and start_time as a process that existed before.
This can be used to circumvent security systems that identify processes
by their pid+start_time combination.

Even though user-space was always aware that start_time recording is
flaky (but several projects are known to still rely on start_time-based
identification), changing the start_time to be recorded late will help
mitigate existing attacks and make it much harder for user-space to
control the start_time a process gets assigned.
Reported-by: default avatarJann Horn <jannh@google.com>
Signed-off-by: default avatarTom Gundersen <teg@jklm.no>
Signed-off-by: default avatarDavid Herrmann <dh.herrmann@gmail.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7b558513
    • Alex Williamson's avatar
      vfio/type1: Fix unmap overflow off-by-one · 58fec830
      Alex Williamson authored 
      The below referenced commit adds a test for integer overflow, but in
doing so prevents the unmap ioctl from ever including the last page of
the address space.  Subtract one to compare to the last address of the
unmap to avoid the overflow and wrap-around.

Fixes: 71a7d3d7 ("vfio/type1: silence integer overflow warning")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1662291
Cc: stable@vger.kernel.org # v4.15+
Reported-by: default avatarPei Zhang <pezhang@redhat.com>
Debugged-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: default avatarPeter Xu <peterx@redhat.com>
Tested-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      58fec830
    • Guo Ren's avatar
      irqchip/csky: fixup handle_irq_perbit break irq · 56752b21
      Guo Ren authored 
      The handle_irq_perbit function loop every bit in hwirq local variable.

handle_irq_perbit(hwirq) {
  for_everyt_bit_in(hwirq) {
	handle_domain_irq()
		->irq_exit()
		->invoke_softirq()
		->__do_softirq()
		->local_irq_enable() // Here will cause new interrupt.
  }
}

When new interrupt coming at local_irq_enable, it will finish another
interrupt handler and pull down the interrupt source. But hwirq is the
local variable for handle_irq_perbit(), it can't get new interrupt
controller pending reg status. So we need update hwirq with pending reg
in every loop.

Also change write_relax to writel could prevent stw from fast retire.
When local_irq is enabled, intc regs is really set-in.
Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Lu Baoquan <lu.baoquan@intellif.com>
      56752b21
    • Guo Ren's avatar
      csky: fixup compile error with pte_alloc · 2a60aa14
      Guo Ren authored 
      Commit: 4cf58924 remove the address argument of pte_alloc without
modify csky related code. linux-5.0-rc1 compile failed with csky.

Remove the unnecessary address testing in pte_alloc().
Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
      2a60aa14
    • Masahiro Yamada's avatar
      vfio/pci: set TRACE_INCLUDE_PATH to fix the build error · d1fc1176
      Masahiro Yamada authored 
      drivers/vfio/pci/vfio_pci_nvlink2.c cannot be compiled for in-tree
building.

    CC      drivers/vfio/pci/vfio_pci_nvlink2.o
  In file included from drivers/vfio/pci/trace.h:102,
                   from drivers/vfio/pci/vfio_pci_nvlink2.c:29:
  ./include/trace/define_trace.h:89:42: fatal error: ./trace.h: No such file or directory
   #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
                                          ^
  compilation terminated.
  make[1]: *** [scripts/Makefile.build;277: drivers/vfio/pci/vfio_pci_nvlink2.o] Error 1

To fix the build error, let's tell include/trace/define_trace.h the
location of drivers/vfio/pci/trace.h

Fixes: 7f928917 ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Reported-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      d1fc1176
    • Guo Ren's avatar
      csky: fixup CACHEV1 store instruction fast retire · 96354ad7
      Guo Ren authored 
      For I/O access, 810/807 store instruction fast retire will cause wrong
primitive. For example:

	stw (clear interrupt source)
	stw (unmask interrupt controller)
	enable interrupt

stw is fast retire instruction. When PC is run at enable interrupt
stage, the clear interrupt source hasn't finished. It will cause another
wrong irq-enter.

So use mb() to prevent above.
Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Lu Baoquan <lu.baoquan@intellif.com>
      96354ad7
    • Guo Ren's avatar
      csky: fixup relocation error with 807 & 860 · f553aa1c
      Guo Ren authored 
      810 doesn't support jsri instruction and csky-as will leave
jsri + nop for relocation. Module-probe need replace them with
lrw + jsr.
Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Hui Kai <huikai@acoinfo.com>
      f553aa1c
    • Christian Lamparter's avatar
      mtd: rawnand: qcom: fix memory corruption that causes panic · 81d9bdf5
      Christian Lamparter authored 
      This patch fixes a memory corruption that occurred in the
qcom-nandc driver since it was converted to nand_scan().

On boot, an affected device will panic from a NPE at a weird place:
| Unable to handle kernel NULL pointer dereference at virtual address 0
| pgd = (ptrval)
| [00000000] *pgd=00000000
| Internal error: Oops: 80000005 [#1] SMP ARM
| CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.9 #0
| Hardware name: Generic DT based system
| PC is at   (null)
| LR is at nand_block_isbad+0x90/0xa4
| pc : [<00000000>]    lr : [<c0592240>]    psr: 80000013
| sp : cf839d40  ip : 00000000  fp : cfae9e20
| r10: cf815810  r9 : 00000000  r8 : 00000000
| r7 : 00000000  r6 : 00000000  r5 : 00000001  r4 : cf815810
| r3 : 00000000  r2 : cfae9810  r1 : ffffffff  r0 : cf815810
| Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
| Control: 10c5387d  Table: 8020406a  DAC: 00000051
| Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
| [<c0592240>] (nand_block_isbad) from [<c0580a94>]
| [<c0580a94>] (allocate_partition) from [<c05811e4>]
| [<c05811e4>] (add_mtd_partitions) from [<c0581164>]
| [<c0581164>] (parse_mtd_partitions) from [<c057def4>]
| [<c057def4>] (mtd_device_parse_register) from [<c059d274>]
| [<c059d274>] (qcom_nandc_probe) from [<c0567f00>]

The problem is that the nand_scan()'s qcom_nand_attach_chip callback
is updating the nandc->max_cwperpage from 1 to 4. This causes the
sg_init_table of clear_bam_transaction() in the driver's
qcom_nandc_block_bad() to memset much more than what was initially
allocated by alloc_bam_transaction().

This patch restores the old behavior by reallocating the shared bam
transaction alloc_bam_transaction() after the chip was identified,
but before mtd_device_parse_register() (which is an alias for
mtd_device_register() - see panic) gets called. This fixes the
corruption and the driver is working again.

Cc: stable@vger.kernel.org
Fixes: 6a3cec64 ("mtd: rawnand: qcom: convert driver to nand_scan()")
Signed-off-by: default avatarChristian Lamparter <chunkeey@gmail.com>
Acked-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: default avatarBoris Brezillon <bbrezillon@kernel.org>
      81d9bdf5
    • Dan Carpenter's avatar
      ALSA: cs46xx: Potential NULL dereference in probe · 1524f4e4
      Dan Carpenter authored 
      The "chip->dsp_spos_instance" can be NULL on some of the ealier error
paths in snd_cs46xx_create().
Reported-by: default avatar"Yavuz, Tuba" <tuba@ece.ufl.edu>
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      1524f4e4
  7. 07 Jan, 2019 2 commits
    • Guo Ren's avatar
      Documentation/features: Add csky kernel features · 8a5aaf97
      Guo Ren authored 
            core/ cBPF-JIT             : TODO |
      core/ eBPF-JIT             : TODO |
      core/ generic-idle-thread  :  ok  |
      core/ jump-labels          : TODO |
      core/ tracehook            :  ok  |
     debug/ KASAN                : TODO |
     debug/ gcov-profile-all     : TODO |
     debug/ kgdb                 : TODO |
     debug/ kprobes-on-ftrace    : TODO |
     debug/ kprobes              : TODO |
     debug/ kretprobes           : TODO |
     debug/ optprobes            : TODO |
     debug/ stackprotector       : TODO |
     debug/ uprobes              : TODO |
     debug/ user-ret-profiler    : TODO |
        io/ dma-contiguous       :  ok  |
   locking/ cmpxchg-local        : TODO |
   locking/ lockdep              : TODO |
   locking/ queued-rwlocks       :  ok  |
   locking/ queued-spinlocks     : TODO |
   locking/ rwsem-optimized      : TODO |
      perf/ kprobes-event        : TODO |
      perf/ perf-regs            : TODO |
      perf/ perf-stackdump       : TODO |
     sched/ membarrier-sync-core : TODO |
     sched/ numa-balancing       :  ..  |
   seccomp/ seccomp-filter       : TODO |
      time/ arch-tick-broadcast  : TODO |
      time/ clockevents          :  ok  |
      time/ context-tracking     : TODO |
      time/ irq-time-acct        : TODO |
      time/ modern-timekeeping   :  ok  |
      time/ virt-cpuacct         : TODO |
        vm/ ELF-ASLR             : TODO |
        vm/ PG_uncached          : TODO |
        vm/ THP                  :  ..  |
        vm/ batch-unmap-tlb-flush: TODO |
        vm/ huge-vmap            : TODO |
        vm/ ioremap_prot         : TODO |
        vm/ numa-memblock        :  ..  |
        vm/ pte_special          : TODO |
Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
      8a5aaf97
    • Boris Brezillon's avatar
      mtd: Check add_mtd_device() ret code · 2b6f0090
      Boris Brezillon authored 
      add_mtd_device() can fail. We should always check its return value
and gracefully handle the failure case. Fix the call sites where this
not done (in mtdpart.c) and add a __must_check attribute to the
prototype to avoid this kind of mistakes.
Signed-off-by: default avatarBoris Brezillon <bbrezillon@kernel.org>
      2b6f0090
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