Add Icelake core PMU perf code, including constraint tables and the main
enable code.
Icelake expanded the generic counters to always 8 even with HT on, but a
range of events cannot be scheduled on the extra 4 counters.
Add new constraint ranges to describe this to the scheduler.
The number of constraints that need to be checked is larger now than
with earlier CPUs.
At some point we may need a new data structure to look them up more
efficiently than with linear search. So far it still seems to be
acceptable however.
Icelake added a new fixed counter SLOTS. Full support for it is added
later in the patch series.
The cache events table is identical to Skylake.
Compare to PEBS instruction event on generic counter, fixed counter 0
has less skid. Force instruction:ppp always in fixed counter 0.
Originally-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-9-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Icelake extended the general counters to 8, even when SMT is enabled.
However only a (large) subset of the events can be used on all 8
counters.
The events that can or cannot be used on all counters are organized
in ranges.
A lot of scheduler constraints are required to handle all this.
To avoid blowing up the tables add event code ranges to the constraint
tables, and a new inline function to match them.
Originally-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> # developer hat on
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> # maintainer hat on
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-8-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
With adaptive PEBS the CPU can directly supply the LBR information,
so we don't need to read it again. But the LBRs still need to be
enabled. Add a special count to the cpuc that distinguishes these
two cases, and avoid reading the LBRs unnecessarily when PEBS is
active.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-7-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Adaptive PEBS is a new way to report PEBS sampling information. Instead
of a fixed size record for all PEBS events it allows to configure the
PEBS record to only include the information needed. Events can then opt
in to use such an extended record, or stay with a basic record which
only contains the IP.
The major new feature is to support LBRs in PEBS record.
Besides normal LBR, this allows (much faster) large PEBS, while still
supporting callstacks through callstack LBR. So essentially a lot of
profiling can now be done without frequent interrupts, dropping the
overhead significantly.
The main requirement still is to use a period, and not use frequency
mode, because frequency mode requires reevaluating the frequency on each
overflow.
The floating point state (XMM) is also supported, which allows efficient
profiling of FP function arguments.
Introduce specific drain function to handle variable length records.
Use a new callback to parse the new record format, and also handle the
STATUS field now being at a different offset.
Add code to set up the configuration register. Since there is only a
single register, all events either get the full super set of all events,
or only the basic record.
Originally-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-6-kan.liang@linux.intel.com
[ Renamed GPRS => GP. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The drain_pebs() could be called twice in a short period for auto-reload
event in pmu::read(). The intel_pmu_save_and_restart_reload() should be
called to update the event->count.
This case should also be handled on Icelake. Extract the code for
later reuse.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-5-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Extract some code related to memory profiling from the PEBS record
parser into separate functions. It can be reused by the upcoming
adaptive PEBS parser. No functional changes.
Rename intel_hsw_weight to intel_get_tsx_weight, and
intel_hsw_transaction to intel_get_tsx_transaction. Because the input is
not the hsw pebs format anymore.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-4-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Starting from Icelake, XMM registers can be collected in PEBS record.
But current code only output the pt_regs.
Add a new struct x86_perf_regs for both pt_regs and xmm_regs. The
xmm_regs will be used later to keep a pointer to PEBS record which has
XMM information.
XMM registers are 128 bit. To simplify the code, they are handled like
two different registers, which means setting two bits in the register
bitmap. This also allows only sampling the lower 64bit bits in XMM.
The index of XMM registers starts from 32. There are 16 XMM registers.
So all reserved space for regs are used. Remove REG_RESERVED.
Add PERF_REG_X86_XMM_MAX, which stands for the max number of all x86
regs including both GPRs and XMM.
Add REG_NOSUPPORT for 32bit to exclude unsupported registers.
Previous platforms can not collect XMM information in PEBS record.
Adding pebs_no_xmm_regs to indicate the unsupported platforms.
The common code still validates the supported registers. However, it
cannot check model specific registers, e.g. XMM. Add extra check in
x86_pmu_hw_config() to reject invalid config of regs_user and regs_intr.
The regs_user never supports XMM collection.
The regs_intr only supports XMM collection when sampling PEBS event on
icelake and later platforms.
Originally-by: Andi Kleen <ak@linux.intel.com>
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: https://lkml.kernel.org/r/20190402194509.2832-3-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This patch add perf_pmu_resched() a global function that can be called
to force rescheduling of events for a given PMU. The function locks
both cpuctx and task_ctx internally. This will be used by a subsequent
patch.
Signed-off-by: Stephane Eranian <eranian@google.com>
[ Simplified the calling convention. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Cc: nelson.dsouza@intel.com
Cc: tonyj@suse.com
Link: https://lkml.kernel.org/r/20190408173252.37932-2-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
PEBS_REGS used as mask for the supported registers for large PEBS.
However, the mask cannot filter the sample_regs_user/sample_regs_intr
correctly.
(1ULL << PERF_REG_X86_*) should be used to replace PERF_REG_X86_*, which
is only the index.
Rename PEBS_REGS to PEBS_GP_REGS, because the mask is only for general
purpose registers.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Fixes: 2fe1bc1f50 ("perf/x86: Enable free running PEBS for REGS_USER/INTR")
Link: https://lkml.kernel.org/r/20190402194509.2832-2-kan.liang@linux.intel.com
[ Renamed it to PEBS_GP_REGS - as 'GPRS' is used elsewhere ;-) ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The following commit:
1627314fb5 ("perf: Suppress AUX/OVERWRITE records")
has an unintended side-effect of also suppressing all AUX records with no flags
and non-zero size, so all the regular records in the full trace mode.
This breaks some use cases for people.
Fix this by restoring "regular" AUX records.
Reported-by: Ben Gainey <Ben.Gainey@arm.com>
Tested-by: Ben Gainey <Ben.Gainey@arm.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: 1627314fb5 ("perf: Suppress AUX/OVERWRITE records")
Link: https://lkml.kernel.org/r/20190329091338.29999-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The following recent commit:
c60f83b813 ("perf, pt, coresight: Fix address filters for vmas with non-zero offset")
changes the address filtering logic to communicate filter ranges to the PMU driver
via a single address range object, instead of having the driver do the final bit of
math.
That change forgets to take into account kernel filters, which are not calculated
the same way as DSO based filters.
Fix that by passing the kernel filters the same way as file-based filters.
This doesn't require any additional changes in the drivers.
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: c60f83b813 ("perf, pt, coresight: Fix address filters for vmas with non-zero offset")
Link: https://lkml.kernel.org/r/20190329091212.29870-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The following commit introduced a bug in one of our error paths:
819319fc93 ("kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()")
it missed to handle the return value of kprobe_optready() as
error-value. In reality, the kprobe_optready() returns a bool
result, so "true" case must be passed instead of 0.
This causes some errors on kprobe boot-time selftests on ARM:
[ ] Beginning kprobe tests...
[ ] Probe ARM code
[ ] kprobe
[ ] kretprobe
[ ] ARM instruction simulation
[ ] Check decoding tables
[ ] Run test cases
[ ] FAIL: test_case_handler not run
[ ] FAIL: Test andge r10, r11, r14, asr r7
[ ] FAIL: Scenario 11
...
[ ] FAIL: Scenario 7
[ ] Total instruction simulation tests=1631, pass=1433 fail=198
[ ] kprobe tests failed
This can happen if an optimized probe is unregistered and next
kprobe is registered on same address until the previous probe
is not reclaimed.
If this happens, a hidden aggregated probe may be kept in memory,
and no new kprobe can probe same address. Also, in that case
register_kprobe() will return "1" instead of minus error value,
which can mislead caller logic.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Naveen N . Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org # v5.0+
Fixes: 819319fc93 ("kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()")
Link: http://lkml.kernel.org/r/155530808559.32517.539898325433642204.stgit@devnote2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- Compatibility fix for nvdimm-security implementations with a default
zero-key.
- Miscellaneous small fixes for out-of-bound accesses, cleanup after
initialization failures, and missing debug messages.
-----BEGIN PGP SIGNATURE-----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=zISv
-----END PGP SIGNATURE-----
Merge tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"I debated holding this back for the v5.2 merge window due to the size
of the "zero-key" changes, but affected users would benefit from
having the fixes sooner. It did not make sense to change the zero-key
semantic in isolation for the "secure-erase" command, but instead
include it for all security commands.
The short background on the need for these changes is that some NVDIMM
platforms enable security with a default zero-key rather than let the
OS specify the initial key. This makes the security enabling that
landed in v5.0 unusable for some users.
Summary:
- Compatibility fix for nvdimm-security implementations with a
default zero-key.
- Miscellaneous small fixes for out-of-bound accesses, cleanup after
initialization failures, and missing debug messages"
* tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
tools/testing/nvdimm: Retain security state after overwrite
libnvdimm/pmem: fix a possible OOB access when read and write pmem
libnvdimm/security, acpi/nfit: unify zero-key for all security commands
libnvdimm/security: provide fix for secure-erase to use zero-key
libnvdimm/btt: Fix a kmemdup failure check
libnvdimm/namespace: Fix a potential NULL pointer dereference
acpi/nfit: Always dump _DSM output payload
- Avoid a crash scenario with architectures like powerpc that require
'pgtable_deposit' for the zero page.
-----BEGIN PGP SIGNATURE-----
iQIcBAABAgAGBQJctNryAAoJEB7SkWpmfYgCzcMP/37LJbb4SYNwnDIW4BF33ril
ZwtPeJJVTR56Ojo+Dy1v9084zeyhUHHewz0Oqx15dm6k/N5SS19yKNFKQDOK+4OC
zbaWD5UOtllU3RQ2ORUOUoqNGF278+h4VVVQMntVaHhdt5f120tgHXxmKoB5Z5zH
Gcy0vZNHoJ5lVYfKjKYG0b0/dWWOD1ZEjTkZjTa4DjhVSQcFauN8DxJ4hSyumYqs
HDnZZt44RTTUS5W3BTlhuaSEcZaDOznmyj1HmKXNg3ghxguKACho4xhA7xFKqT8O
03WZxDBFnOXZb3yfKpHB6RclkJgrtmD5U5GStzl5SobLPb2E/TPQzCRhZ/kcFPZ8
RE2JkgdGl8gqCDRqRsC/tbF3dETO66vxUyf5utNv0ttBk7qLMwTGTKm3VQz7Xvu2
SLkwv6Rlw4UT6ML8nd2kNhf8xRkaLl6j1B6zWDy7wEoFPXWW+My0PPpsJZcbTeza
eib2ood7AlPHRU0/mW2ZrGHGabbS6kNGeQlod9U5sikkE7ZA/LwzyFl4b/uCqYNP
NKGQdz0iHVcq8lFPXEmZ7vP2krd6uUWIv9KaiwmjBBMf9w3ZAzS85c7HFAZD0zgC
tTHm6stMhpdS3ndyIxMBf0sL7AB/Q9BH7jJwDK/P8QObovezW2zZ4CPx/gQYJ2XU
LTeCJmQh3xcCpI3f/eka
=ijtJ
-----END PGP SIGNATURE-----
Merge tag 'fsdax-fix-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull fsdax fix from Dan Williams:
"A single filesystem-dax fix. It has been lingering in -next for a long
while and there are no other fsdax fixes on the horizon:
- Avoid a crash scenario with architectures like powerpc that require
'pgtable_deposit' for the zero page"
* tag 'fsdax-fix-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
fs/dax: Deposit pagetable even when installing zero page
Merge page ref overflow branch.
Jann Horn reported that he can overflow the page ref count with
sufficient memory (and a filesystem that is intentionally extremely
slow).
Admittedly it's not exactly easy. To have more than four billion
references to a page requires a minimum of 32GB of kernel memory just
for the pointers to the pages, much less any metadata to keep track of
those pointers. Jann needed a total of 140GB of memory and a specially
crafted filesystem that leaves all reads pending (in order to not ever
free the page references and just keep adding more).
Still, we have a fairly straightforward way to limit the two obvious
user-controllable sources of page references: direct-IO like page
references gotten through get_user_pages(), and the splice pipe page
duplication. So let's just do that.
* branch page-refs:
fs: prevent page refcount overflow in pipe_buf_get
mm: prevent get_user_pages() from overflowing page refcount
mm: add 'try_get_page()' helper function
mm: make page ref count overflow check tighter and more explicit
Change pipe_buf_get() to return a bool indicating whether it succeeded
in raising the refcount of the page (if the thing in the pipe is a page).
This removes another mechanism for overflowing the page refcount. All
callers converted to handle a failure.
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If the page refcount wraps around past zero, it will be freed while
there are still four billion references to it. One of the possible
avenues for an attacker to try to make this happen is by doing direct IO
on a page multiple times. This patch makes get_user_pages() refuse to
take a new page reference if there are already more than two billion
references to the page.
Reported-by: Jann Horn <jannh@google.com>
Acked-by: Matthew Wilcox <willy@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is the same as the traditional 'get_page()' function, but instead
of unconditionally incrementing the reference count of the page, it only
does so if the count was "safe". It returns whether the reference count
was incremented (and is marked __must_check, since the caller obviously
has to be aware of it).
Also like 'get_page()', you can't use this function unless you already
had a reference to the page. The intent is that you can use this
exactly like get_page(), but in situations where you want to limit the
maximum reference count.
The code currently does an unconditional WARN_ON_ONCE() if we ever hit
the reference count issues (either zero or negative), as a notification
that the conditional non-increment actually happened.
NOTE! The count access for the "safety" check is inherently racy, but
that doesn't matter since the buffer we use is basically half the range
of the reference count (ie we look at the sign of the count).
Acked-by: Matthew Wilcox <willy@infradead.org>
Cc: Jann Horn <jannh@google.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We have a VM_BUG_ON() to check that the page reference count doesn't
underflow (or get close to overflow) by checking the sign of the count.
That's all fine, but we actually want to allow people to use a "get page
ref unless it's already very high" helper function, and we want that one
to use the sign of the page ref (without triggering this VM_BUG_ON).
Change the VM_BUG_ON to only check for small underflows (or _very_ close
to overflowing), and ignore overflows which have strayed into negative
territory.
Acked-by: Matthew Wilcox <willy@infradead.org>
Cc: Jann Horn <jannh@google.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=cISy
-----END PGP SIGNATURE-----
Merge tag 'for-linus-20190412' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Set of fixes that should go into this round. This pull is larger than
I'd like at this time, but there's really no specific reason for that.
Some are fixes for issues that went into this merge window, others are
not. Anyway, this contains:
- Hardware queue limiting for virtio-blk/scsi (Dongli)
- Multi-page bvec fixes for lightnvm pblk
- Multi-bio dio error fix (Jason)
- Remove the cache hint from the io_uring tool side, since we didn't
move forward with that (me)
- Make io_uring SETUP_SQPOLL root restricted (me)
- Fix leak of page in error handling for pc requests (Jérôme)
- Fix BFQ regression introduced in this merge window (Paolo)
- Fix break logic for bio segment iteration (Ming)
- Fix NVMe cancel request error handling (Ming)
- NVMe pull request with two fixes (Christoph):
- fix the initial CSN for nvme-fc (James)
- handle log page offsets properly in the target (Keith)"
* tag 'for-linus-20190412' of git://git.kernel.dk/linux-block:
block: fix the return errno for direct IO
nvmet: fix discover log page when offsets are used
nvme-fc: correct csn initialization and increments on error
block: do not leak memory in bio_copy_user_iov()
lightnvm: pblk: fix crash in pblk_end_partial_read due to multipage bvecs
nvme: cancel request synchronously
blk-mq: introduce blk_mq_complete_request_sync()
scsi: virtio_scsi: limit number of hw queues by nr_cpu_ids
virtio-blk: limit number of hw queues by nr_cpu_ids
block, bfq: fix use after free in bfq_bfqq_expire
io_uring: restrict IORING_SETUP_SQPOLL to root
tools/io_uring: remove IOCQE_FLAG_CACHEHIT
block: don't use for-inside-for in bio_for_each_segment_all
Highlights include:
Stable fixes:
- Fix a deadlock in close() due to incorrect draining of RDMA queues
Bugfixes:
- Revert "SUNRPC: Micro-optimise when the task is known not to be sleeping"
as it is causing stack overflows
- Fix a regression where NFSv4 getacl and fs_locations stopped working
- Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
- Fix xfstests failures due to incorrect copy_file_range() return values
-----BEGIN PGP SIGNATURE-----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=vRPB
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.1-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Highlights include:
Stable fix:
- Fix a deadlock in close() due to incorrect draining of RDMA queues
Bugfixes:
- Revert "SUNRPC: Micro-optimise when the task is known not to be
sleeping" as it is causing stack overflows
- Fix a regression where NFSv4 getacl and fs_locations stopped
working
- Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
- Fix xfstests failures due to incorrect copy_file_range() return
values"
* tag 'nfs-for-5.1-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
Revert "SUNRPC: Micro-optimise when the task is known not to be sleeping"
NFSv4.1 fix incorrect return value in copy_file_range
xprtrdma: Fix helper that drains the transport
NFS: Fix handling of reply page vector
NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
One obvious fix for a ciostor data corruption on error bug.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
-----BEGIN PGP SIGNATURE-----
iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCXLGx4yYcamFtZXMuYm90
dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishXlDAQD41knG
TLx+E1FCgYEMuq7SdQx6D1Z7l6ZSwBh1hntHdQD+KHAVafU6Kx2lTzfNw7FlCZZ5
LBwX/4AxmatTzQI4jFg=
=Fxkf
-----END PGP SIGNATURE-----
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fix from James Bottomley:
"One obvious fix for a ciostor data corruption on error bug"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: csiostor: fix missing data copy in csio_scsi_err_handler()
during the merge window:
- Fix the AT91 sama5d2 programmable clk prescaler formula
- A bunch of Amlogic meson clk driver fixes for the VPU clks
- A DMI quirk for Intel's Bay Trail SoC's driver to properly mark
pmc clks as critical only when really needed
- Stop overwriting CLK_SET_RATE_PARENT flag in mediatek's clk gate
implementation
- Use the right structure to test for a frequency table in i.MX's
PLL_1416x driver
-----BEGIN PGP SIGNATURE-----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=JS0o
-----END PGP SIGNATURE-----
Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"Here's more than a handful of clk driver fixes for changes that came
in during the merge window:
- Fix the AT91 sama5d2 programmable clk prescaler formula
- A bunch of Amlogic meson clk driver fixes for the VPU clks
- A DMI quirk for Intel's Bay Trail SoC's driver to properly mark pmc
clks as critical only when really needed
- Stop overwriting CLK_SET_RATE_PARENT flag in mediatek's clk gate
implementation
- Use the right structure to test for a frequency table in i.MX's
PLL_1416x driver"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: imx: Fix PLL_1416X not rounding rates
clk: mediatek: fix clk-gate flag setting
platform/x86: pmc_atom: Drop __initconst on dmi table
clk: x86: Add system specific quirk to mark clocks as critical
clk: meson: vid-pll-div: remove warning and return 0 on invalid config
clk: meson: pll: fix rounding and setting a rate that matches precisely
clk: meson-g12a: fix VPU clock parents
clk: meson: g12a: fix VPU clock muxes mask
clk: meson-gxbb: round the vdec dividers to closest
clk: at91: fix programmable clock for sama5d2
-----BEGIN PGP SIGNATURE-----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=DdoZ
-----END PGP SIGNATURE-----
Merge tag 'pci-v5.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
- Add a DMA alias quirk for another Marvell SATA device (Andre
Przywara)
- Fix a pciehp regression that broke safe removal of devices (Sergey
Miroshnichenko)
* tag 'pci-v5.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: pciehp: Ignore Link State Changes after powering off a slot
PCI: Add function 1 DMA alias quirk for Marvell 9170 SATA controller
A minor build fix for 64-bit FLATMEM configs.
A fix for a boot failure on 32-bit powermacs.
My commit to fix CLOCK_MONOTONIC across Y2038 broke the 32-bit VDSO on 64-bit
kernels, ie. compat mode, which is only used on big endian.
The rewrite of the SLB code we merged in 4.20 missed the fact that the 0x380
exception is also used with the Radix MMU to report out of range accesses. This
could lead to an oops if userspace tried to read from addresses outside the user
or kernel range.
Thanks to:
Aneesh Kumar K.V, Christophe Leroy, Larry Finger, Nicholas Piggin.
-----BEGIN PGP SIGNATURE-----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=pfZc
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.1-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"A minor build fix for 64-bit FLATMEM configs.
A fix for a boot failure on 32-bit powermacs.
My commit to fix CLOCK_MONOTONIC across Y2038 broke the 32-bit VDSO on
64-bit kernels, ie. compat mode, which is only used on big endian.
The rewrite of the SLB code we merged in 4.20 missed the fact that the
0x380 exception is also used with the Radix MMU to report out of range
accesses. This could lead to an oops if userspace tried to read from
addresses outside the user or kernel range.
Thanks to: Aneesh Kumar K.V, Christophe Leroy, Larry Finger, Nicholas
Piggin"
* tag 'powerpc-5.1-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Define MAX_PHYSMEM_BITS for all 64-bit configs
powerpc/64s/radix: Fix radix segment exception handling
powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64
powerpc/32: Fix early boot failure with RTAS built-in
- Fix stack unwinding so we ignore user stacks
- Fix ftrace module PLT trampoline initialisation checks
- Fix terminally broken implementation of FUTEX_WAKE_OP atomics
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAlywnLUACgkQt6xw3ITB
YzSWLAgAtcvWXLbKCGgTsgFwkW0at9j1kwC0eyaLKXY1RQXCA+s2nYaaK1p8vXr0
qhnKI2do2Jwef0kGEX2iS5PMZaGZv32woWNFd+VLzUimAMNAsSBBKpc7S76tovjo
5UtFa5SlePy946hV8vAYdyfOemW+5+VfZ7Z5IqQyrF77SL+5Z4CmQxxsrRCpBKMy
HvNlEzp+opnF0zLBSfcw3YMzN5iYpSK3yqQ2NzR5KjfEKuf9vwePMkgLik1AlT9b
24ba/Q1g3QB58OqUiRbepR1yxK8sPBtsCaabdMFYeU/b6PZtvnvVnvpNS8a54/SG
sTnosSSdPnRZT5HIJYcYwbWS11xaNg==
=EZmf
-----END PGP SIGNATURE-----
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The main thing is a fix to our FUTEX_WAKE_OP implementation which was
unbelievably broken, but did actually work for the one scenario that
GLIBC used to use.
Summary:
- Fix stack unwinding so we ignore user stacks
- Fix ftrace module PLT trampoline initialisation checks
- Fix terminally broken implementation of FUTEX_WAKE_OP atomics"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: futex: Fix FUTEX_WAKE_OP atomic ops with non-zero result value
arm64: backtrace: Don't bother trying to unwind the userspace stack
arm64/ftrace: fix inadvertent BUG() in trampoline check
Pull x86 fixes from Ingo Molnar:
"Fix typos in user-visible resctrl parameters, and also fix assembly
constraint bugs that might result in miscompilation"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm: Use stricter assembly constraints in bitops
x86/resctrl: Fix typos in the mba_sc mount option
Pull timer fix from Ingo Molnar:
"Fix the alarm_timer_remaining() return value"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
alarmtimer: Return correct remaining time
Pull scheduler fix from Ingo Molnar:
"Fix a NULL pointer dereference crash in certain environments"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Do not re-read ->h_load_next during hierarchical load calculation
Pull perf fixes from Ingo Molnar:
"Six kernel side fixes: three related to NMI handling on AMD systems, a
race fix, a kexec initialization fix and a PEBS sampling fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Fix perf_event_disable_inatomic() race
x86/perf/amd: Remove need to check "running" bit in NMI handler
x86/perf/amd: Resolve NMI latency issues for active PMCs
x86/perf/amd: Resolve race condition when disabling PMC
perf/x86/intel: Initialize TFA MSR
perf/x86/intel: Fix handling of wakeup_events for multi-entry PEBS
Pull locking fix from Ingo Molnar:
"Fixes a crash when accessing /proc/lockdep"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/lockdep: Zap lock classes even with lock debugging disabled
Pull core fixes from Ingo Molnar:
"Fix an objtool warning plus fix a u64_to_user_ptr() macro expansion
bug"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Add rewind_stack_do_exit() to the noreturn list
linux/kernel.h: Use parentheses around argument in u64_to_user_ptr()
Code which initializes the "clk_init_data.ops" checks pll->rate_table
before that field is ever assigned to so it always picks
"clk_pll1416x_min_ops".
This breaks dynamic rate rounding for features such as cpufreq.
Fix by checking pll_clk->rate_table instead, here pll_clk refers to
the constant initialization data coming from per-soc clk driver.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Fixes: 8646d4dcc7 ("clk: imx: Add PLLs driver for imx8mm soc")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
CLK_SET_RATE_PARENT would be dropped.
Merge two flag setting together to correct the error.
Fixes: 5a1cc4c27a ("clk: mediatek: Add flags to mtk_gate")
Cc: <stable@vger.kernel.org>
Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Fix a sparc64 sun4v_pci regression introduced in this merged window,
and a dma-debug stracktrace regression from the big refactor last
merge window.
-----BEGIN PGP SIGNATURE-----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=Ohx3
-----END PGP SIGNATURE-----
Merge tag 'dma-mapping-5.1-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
"Fix a sparc64 sun4v_pci regression introduced in this merged window,
and a dma-debug stracktrace regression from the big refactor last
merge window"
* tag 'dma-mapping-5.1-1' of git://git.infradead.org/users/hch/dma-mapping:
dma-debug: only skip one stackframe entry
sparc64/pci_sun4v: fix ATU checks for large DMA masks
- Fix an AMD IOMMU issue where the driver didn't correctly setup the
exclusion range in the hardware registers, resulting in exclusion
ranges being one page too big. This can cause data corruption of the
address of that last page is used by DMA operations.
-----BEGIN PGP SIGNATURE-----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=ct7y
-----END PGP SIGNATURE-----
Merge tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"Fix an AMD IOMMU issue where the driver didn't correctly setup the
exclusion range in the hardware registers, resulting in exclusion
ranges being one page too big.
This can cause data corruption of the address of that last page is
used by DMA operations"
* tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Set exclusion range correctly
-----BEGIN PGP SIGNATURE-----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=yhz1
-----END PGP SIGNATURE-----
Merge tag 'clang-format-for-linus-v5.1-rc5' of git://github.com/ojeda/linux
Pull clang-format update from Miguel Ojeda:
"The usual roughly-per-release .clang-format macro list update"
* tag 'clang-format-for-linus-v5.1-rc5' of git://github.com/ojeda/linux:
clang-format: Update with the latest for_each macro list
- alcor: Stabilize data write requests
- sdhci-omap: Fix command error path during tuning
-----BEGIN PGP SIGNATURE-----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=N8+A
-----END PGP SIGNATURE-----
Merge tag 'mmc-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC host fixes from Ulf Hansson:
- alcor: Stabilize data write requests
- sdhci-omap: Fix command error path during tuning
* tag 'mmc-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning
mmc: alcor: don't write data before command has completed
Well, this one became unpleasantly larger than previous pull requests,
but it's a kind of usual pattern: now it contains a collection of ASoC
fixes, and nothing to worry too much.
The fixes for ASoC core (DAPM, DPCM, topology) are all small and just
covering corner cases. The rest changes are driver-specific, many of
which are for x86 platforms and new drivers like STM32, in addition to
the usual fixups for HD-audio.
-----BEGIN PGP SIGNATURE-----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=aZdP
-----END PGP SIGNATURE-----
Merge tag 'sound-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Well, this one became unpleasantly larger than previous pull requests,
but it's a kind of usual pattern: now it contains a collection of ASoC
fixes, and nothing to worry too much.
The fixes for ASoC core (DAPM, DPCM, topology) are all small and just
covering corner cases. The rest changes are driver-specific, many of
which are for x86 platforms and new drivers like STM32, in addition to
the usual fixups for HD-audio"
* tag 'sound-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (66 commits)
ASoC: wcd9335: Fix missing regmap requirement
ALSA: hda: Fix racy display power access
ASoC: pcm: fix error handling when try_module_get() fails.
ASoC: stm32: sai: fix master clock management
ASoC: Intel: kbl: fix wrong number of channels
ALSA: hda - Add two more machines to the power_save_blacklist
ASoC: pcm: update module refcount if module_get_upon_open is set
ASoC: core: conditionally increase module refcount on component open
ASoC: stm32: fix sai driver name initialisation
ASoC: topology: Use the correct dobj to free enum control values and texts
ALSA: seq: Fix OOB-reads from strlcpy
ASoC: intel: skylake: add remove() callback for component driver
ASoC: cs35l35: Disable regulators on driver removal
ALSA: xen-front: Do not use stream buffer size before it is set
ASoC: rockchip: pdm: change dma burst to 8
ASoC: rockchip: pdm: fix regmap_ops hang issue
ASoC: simple-card: don't select DPCM via simple-audio-card
ASoC: audio-graph-card: don't select DPCM via audio-graph-card
ASoC: tlv320aic32x4: Change author's name
ALSA: hda/realtek - Add quirk for Tuxedo XC 1509
...
Fix an ACPICA issue introduced during the 4.20 development cycle and
causing some systems to crash because of leftover operation region
data still maintained after the operation region in question has gone
away (Erik Schmauss).
-----BEGIN PGP SIGNATURE-----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=e+lC
-----END PGP SIGNATURE-----
Merge tag 'acpi-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Fix an ACPICA issue introduced during the 4.20 development cycle and
causing some systems to crash because of leftover operation region
data still maintained after the operation region in question has gone
away (Erik Schmauss)"
* tag 'acpi-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPICA: Namespace: remove address node from global list after method termination
-----BEGIN PGP SIGNATURE-----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=6JCc
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-2019-04-12' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Fixes across the driver spectrum this week, the mediatek fbdev support
might be a bit late for this round, but I looked over it and it's not
very large and seems like a useful feature for them.
Otherwise the main thing is a regression fix for i915 5.0 bug that
caused black screens on a bunch of Dell XPS 15s I think, I know at
least Fedora is waiting for this to land, and the udl fix is also for
a regression since 5.0 where unplugging the device would end badly.
core:
- make atomic hooks optional
i915:
- Revert a 5.0 regression where some eDP panels stopped working
- DSI related fixes for platforms up to IceLake
- GVT (regression fix, warning fix, use-after free fix)
amdgpu:
- Cursor fixes
- missing PCI ID fix for KFD
- XGMI fix
- shadow buffer handling after reset fix
udl:
- fix unplugging device crashes.
mediatek:
- stabilise MT2701 HDMI support
- fbdev support
tegra:
- fix for build regression in rc1.
sun4i:
- Allwinner A6 max freq improvements
- null ptr deref fix
dw-hdmi:
- SCDC configuration improvements
omap:
- CEC clock management policy fix"
* tag 'drm-fixes-2019-04-12' of git://anongit.freedesktop.org/drm/drm: (32 commits)
gpu: host1x: Fix compile error when IOMMU API is not available
drm/i915/gvt: Roundup fb->height into tile's height at calucation fb->size
drm/i915/dp: revert back to max link rate and lane count on eDP
drm/i915/icl: Fix port disable sequence for mipi-dsi
drm/i915/icl: Ungate ddi clocks before IO enable
drm/mediatek: no change parent rate in round_rate() for MT2701 hdmi phy
drm/mediatek: using new factor for tvdpll for MT2701 hdmi phy
drm/mediatek: remove flag CLK_SET_RATE_PARENT for MT2701 hdmi phy
drm/mediatek: make implementation of recalc_rate() for MT2701 hdmi phy
drm/mediatek: fix the rate and divder of hdmi phy for MT2701
drm/mediatek: fix possible object reference leak
drm/i915: Get power refs in encoder->get_power_domains()
drm/i915: Fix pipe_bpp readout for BXT/GLK DSI
drm/amd/display: Fix negative cursor pos programming (v2)
drm/sun4i: tcon top: Fix NULL/invalid pointer dereference in sun8i_tcon_top_un/bind
drm/udl: add a release method and delay modeset teardown
drm/i915/gvt: Prevent use-after-free in ppgtt_free_all_spt()
drm/i915/gvt: Annotate iomem usage
drm/sun4i: DW HDMI: Lower max. supported rate for H6
Revert "Documentation/gpu/meson: Remove link to meson_canvas.c"
...
Rather embarrassingly, our futex() FUTEX_WAKE_OP implementation doesn't
explicitly set the return value on the non-faulting path and instead
leaves it holding the result of the underlying atomic operation. This
means that any FUTEX_WAKE_OP atomic operation which computes a non-zero
value will be reported as having failed. Regrettably, I wrote the buggy
code back in 2011 and it was upstreamed as part of the initial arm64
support in 2012.
The reasons we appear to get away with this are:
1. FUTEX_WAKE_OP is rarely used and therefore doesn't appear to get
exercised by futex() test applications
2. If the result of the atomic operation is zero, the system call
behaves correctly
3. Prior to version 2.25, the only operation used by GLIBC set the
futex to zero, and therefore worked as expected. From 2.25 onwards,
FUTEX_WAKE_OP is not used by GLIBC at all.
Fix the implementation by ensuring that the return value is either 0
to indicate that the atomic operation completed successfully, or -EFAULT
if we encountered a fault when accessing the user mapping.
Cc: <stable@kernel.org>
Fixes: 6170a97460 ("arm64: Atomic operations")
Signed-off-by: Will Deacon <will.deacon@arm.com>
