OpenCloudOS-Kernel/drivers/misc
Linus Torvalds ba9f6f8954 Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull siginfo updates from Eric Biederman:
 "I have been slowly sorting out siginfo and this is the culmination of
  that work.

  The primary result is in several ways the signal infrastructure has
  been made less error prone. The code has been updated so that manually
  specifying SEND_SIG_FORCED is never necessary. The conversion to the
  new siginfo sending functions is now complete, which makes it
  difficult to send a signal without filling in the proper siginfo
  fields.

  At the tail end of the patchset comes the optimization of decreasing
  the size of struct siginfo in the kernel from 128 bytes to about 48
  bytes on 64bit. The fundamental observation that enables this is by
  definition none of the known ways to use struct siginfo uses the extra
  bytes.

  This comes at the cost of a small user space observable difference.
  For the rare case of siginfo being injected into the kernel only what
  can be copied into kernel_siginfo is delivered to the destination, the
  rest of the bytes are set to 0. For cases where the signal and the
  si_code are known this is safe, because we know those bytes are not
  used. For cases where the signal and si_code combination is unknown
  the bits that won't fit into struct kernel_siginfo are tested to
  verify they are zero, and the send fails if they are not.

  I made an extensive search through userspace code and I could not find
  anything that would break because of the above change. If it turns out
  I did break something it will take just the revert of a single change
  to restore kernel_siginfo to the same size as userspace siginfo.

  Testing did reveal dependencies on preferring the signo passed to
  sigqueueinfo over si->signo, so bit the bullet and added the
  complexity necessary to handle that case.

  Testing also revealed bad things can happen if a negative signal
  number is passed into the system calls. Something no sane application
  will do but something a malicious program or a fuzzer might do. So I
  have fixed the code that performs the bounds checks to ensure negative
  signal numbers are handled"

* 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (80 commits)
  signal: Guard against negative signal numbers in copy_siginfo_from_user32
  signal: Guard against negative signal numbers in copy_siginfo_from_user
  signal: In sigqueueinfo prefer sig not si_signo
  signal: Use a smaller struct siginfo in the kernel
  signal: Distinguish between kernel_siginfo and siginfo
  signal: Introduce copy_siginfo_from_user and use it's return value
  signal: Remove the need for __ARCH_SI_PREABLE_SIZE and SI_PAD_SIZE
  signal: Fail sigqueueinfo if si_signo != sig
  signal/sparc: Move EMT_TAGOVF into the generic siginfo.h
  signal/unicore32: Use force_sig_fault where appropriate
  signal/unicore32: Generate siginfo in ucs32_notify_die
  signal/unicore32: Use send_sig_fault where appropriate
  signal/arc: Use force_sig_fault where appropriate
  signal/arc: Push siginfo generation into unhandled_exception
  signal/ia64: Use force_sig_fault where appropriate
  signal/ia64: Use the force_sig(SIGSEGV,...) in ia64_rt_sigreturn
  signal/ia64: Use the generic force_sigsegv in setup_frame
  signal/arm/kvm: Use send_sig_mceerr
  signal/arm: Use send_sig_fault where appropriate
  signal/arm: Use force_sig_fault where appropriate
  ...
2018-10-24 11:22:39 +01:00
..
altera-stapl treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
c2port kmemcheck: remove annotations 2017-11-15 18:21:04 -08:00
cardreader misc: rtsx: make several functions static 2018-07-03 13:01:48 +02:00
cb710 cb710: Convert to new IDA API 2018-08-21 23:54:18 -04:00
cxl Merge branch 'akpm' (patches from Andrew) 2018-08-17 16:49:31 -07:00
echo misc: Remove Blackfin DSP echo support 2018-03-26 15:56:37 +02:00
eeprom Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-08-21 17:40:46 -07:00
genwqe signal/GenWQE: Fix sending of SIGKILL 2018-09-15 16:07:19 +02:00
ibmasm ibmasm: don't write out of bounds in read handler 2018-07-07 09:59:35 +02:00
lis3lv02d vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
lkdtm lkdtm: Test copy_to_user() on bad kernel pointer under KERNEL_DS 2018-09-03 15:12:10 +02:00
mei mei: bus: need to unlink client before freeing 2018-09-12 09:14:24 +02:00
mic mm, oom: distinguish blockable mode for mmu notifiers 2018-08-22 10:52:44 -07:00
ocxl Merge branch 'akpm' (patches from Andrew) 2018-08-17 16:49:31 -07:00
sgi-gru mm, oom: distinguish blockable mode for mmu notifiers 2018-08-22 10:52:44 -07:00
sgi-xp sgi-xp: xpc_partition: mark expected switch fall-throughs 2018-07-07 17:38:57 +02:00
ti-st misc: ti-st: Fix memory leak in the error path of probe() 2018-08-02 10:35:04 +02:00
vmw_vmci vmci: type promotion bug in qp_host_get_user_memory() 2018-07-07 17:32:40 +02:00
Kconfig misc: IBM Virtual Management Channel Driver (VMC) 2018-05-14 16:35:42 +02:00
Makefile misc: IBM Virtual Management Channel Driver (VMC) 2018-05-14 16:35:42 +02:00
ad525x_dpot-i2c.c
ad525x_dpot-spi.c
ad525x_dpot.c misc: ad525x_dpot: macros should not use a trailing semicolon 2017-12-18 16:02:26 +01:00
ad525x_dpot.h misc: ad525x_dpot: Unnecessary space before function pointer arguments 2017-12-18 15:59:17 +01:00
apds990x.c misc: apds990x: Missing a blank line after declarations. 2017-12-18 16:02:26 +01:00
apds9802als.c misc: apds9802als: constify i2c_device_id 2017-08-28 16:55:49 +02:00
aspeed-lpc-ctrl.c misc: aspeed-lpc-ctrl: Enable FWH and A2H bridge cycles 2018-03-15 18:20:51 +01:00
aspeed-lpc-snoop.c drivers/misc: Aspeed LPC snoop output using misc chardev 2018-07-16 13:30:47 +02:00
atmel-ssc.c misc: atmel-ssc: register as sound DAI if #sound-dai-cells is present 2016-12-15 12:13:31 +00:00
atmel_tclib.c
bh1770glc.c misc: bh1770glc: constify attribute_group structures. 2017-08-28 16:55:48 +02:00
cs5535-mfgpt.c
ds1682.c misc: ds1682: Ignore update-in-progress ETC reads 2018-01-09 17:03:57 +01:00
dummy-irq.c Annotate hardware config module parameters in drivers/misc/ 2017-04-20 12:02:32 +01:00
enclosure.c misc: enclosure: Remove unnecessary error check 2017-12-07 18:45:31 +01:00
fsa9480.c misc: fsa9480: Add blank line after declarations. 2018-01-09 17:03:57 +01:00
hmc6352.c misc: hmc6352: fix potential Spectre v1 2018-09-12 09:31:00 +02:00
hpilo.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
hpilo.h misc: hpilo: Use SPDX-License-Identifier 2017-12-07 18:45:31 +01:00
ibmvmc.c misc: ibmvsm: Fix wrong assignment of return code 2018-09-12 09:31:00 +02:00
ibmvmc.h misc: IBM Virtual Management Channel Driver (VMC) 2018-05-14 16:35:42 +02:00
ics932s401.c misc: ics932s401: open brace should be on the previous line 2017-12-18 16:00:57 +01:00
ioc4.c misc: ioc4: constify pci_device_id. 2017-08-28 16:55:48 +02:00
isl29003.c misc: isl29003: Missing a blank line after declarations 2017-12-07 18:45:31 +01:00
isl29020.c misc: isl29020: constify i2c_device_id 2017-08-28 16:55:49 +02:00
kgdbts.c misc: kgdbts: Display progress of asynchronous tests 2018-01-25 08:40:17 -06:00
lattice-ecp3-config.c
pch_phub.c MISC: add const to bin_attribute structures 2017-08-28 16:55:48 +02:00
pci_endpoint_test.c pci_endpoint_test: Add 2 ioctl commands 2018-07-19 11:46:57 +01:00
phantom.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
pti.c drivers/misc/intel/pti: Rename the header file to free up the namespace 2017-12-17 12:52:34 +01:00
qcom-coincell.c ARM: qcom: silence an uninitialized variable warning 2016-05-01 14:20:04 -07:00
spear13xx_pcie_gadget.c
sram-exec.c misc: sram-exec: Use aligned fncpy instead of memcpy 2017-05-18 17:37:52 +02:00
sram.c misc: sram: enable clock before registering regions 2018-07-06 16:48:15 +02:00
sram.h misc: sram: Integrate protect-exec reserved sram area type 2017-01-25 11:48:03 +01:00
tifm_7xx1.c misc: tifm: Remove VLA 2018-04-23 13:31:27 +02:00
tifm_core.c
tsl2550.c tsl2550: fix lux1_input error in low light 2018-07-07 17:44:52 +02:00
vexpress-syscfg.c misc: vexpress/syscfg: Use devm_ioremap_resource() to map memory 2018-07-16 13:32:08 +02:00
vmw_balloon.c Merge 4.18-rc5 into char-misc-next 2018-07-16 09:04:54 +02:00