History log of /openbmc/linux/arch/x86/kernel/kprobes/opt.c (Results 401 – 425 of 576)
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# 9095bf25 25-Apr-2017 Mark Brown <broonie@kernel.org>

Merge tag 'v4.11-rc1' into regulator-arizona

Linux 4.11-rc1


Revision tags: v4.10.12, v4.10.11, v4.10.10, v4.10.9, v4.10.8, v4.10.7
# a8d11cd0 29-Mar-2017 Masami Hiramatsu <mhiramat@kernel.org>

kprobes/x86: Consolidate insn decoder users for copying code

Consolidate x86 instruction decoder users on the path of
copying original code for kprobes.

Kprobes decodes the same instruction a maxim

kprobes/x86: Consolidate insn decoder users for copying code

Consolidate x86 instruction decoder users on the path of
copying original code for kprobes.

Kprobes decodes the same instruction a maximum of 3 times when
preparing the instruction buffer:

- The first time for getting the length of the instruction,
- the 2nd for adjusting displacement,
- and the 3rd for checking whether the instruction is boostable or not.

For each time, the actual decoding target address is slightly
different (1st is original address or recovered instruction buffer,
2nd and 3rd are pointing to the copied buffer), but all have
the same instruction.

Thus, this patch also changes the target address to the copied
buffer at first and reuses the decoded "insn" for displacement
adjusting and checking boostability.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ye Xiaolong <xiaolong.ye@intel.com>
Link: http://lkml.kernel.org/r/149076389643.22469.13151892839998777373.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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# ea1e34fc 29-Mar-2017 Masami Hiramatsu <mhiramat@kernel.org>

kprobes/x86: Use probe_kernel_read() instead of memcpy()

Use probe_kernel_read() for avoiding unexpected faults while
copying kernel text in __recover_probed_insn(),
__recover_optprobed_insn() and _

kprobes/x86: Use probe_kernel_read() instead of memcpy()

Use probe_kernel_read() for avoiding unexpected faults while
copying kernel text in __recover_probed_insn(),
__recover_optprobed_insn() and __copy_instruction().

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ye Xiaolong <xiaolong.ye@intel.com>
Link: http://lkml.kernel.org/r/149076382624.22469.10091613887942958518.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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# d0381c81 29-Mar-2017 Masami Hiramatsu <mhiramat@kernel.org>

kprobes/x86: Set kprobes pages read-only

Set the pages which is used for kprobes' singlestep buffer
and optprobe's trampoline instruction buffer to readonly.
This can prevent unexpected (or unintend

kprobes/x86: Set kprobes pages read-only

Set the pages which is used for kprobes' singlestep buffer
and optprobe's trampoline instruction buffer to readonly.
This can prevent unexpected (or unintended) instruction
modification.

This also passes rodata_test as below.

Without this patch, rodata_test shows a warning:

WARNING: CPU: 0 PID: 1 at arch/x86/mm/dump_pagetables.c:235 note_page+0x7a9/0xa20
x86/mm: Found insecure W+X mapping at address ffffffffa0000000/0xffffffffa0000000

With this fix, no W+X pages are found:

x86/mm: Checked W+X mappings: passed, no W+X pages found.
rodata_test: all tests were successful

Reported-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ye Xiaolong <xiaolong.ye@intel.com>
Link: http://lkml.kernel.org/r/149076375592.22469.14174394514338612247.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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# fccfb995 06-Apr-2017 Al Viro <viro@zeniv.linux.org.uk>

Merge commit 'b4fb8f66f1ae2e167d06c12d018025a8d4d3ba7e' into uaccess.ia64

backmerge of mainline ia64 fix


# 3a374715 06-Apr-2017 Mark Brown <broonie@kernel.org>

Merge branch 'fix/rcar' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-rcar


# 054838bc 06-Apr-2017 Al Viro <viro@zeniv.linux.org.uk>

Merge commit 'fc69910f329d' into uaccess.mips

backmerge of a build fix from mainline


# 3872fe83 05-Apr-2017 Russell King <rmk+kernel@armlinux.org.uk>

Merge branch 'kprobe-fixes' of https://git.linaro.org/people/tixy/kernel into fixes


# 7ca0ef3d 04-Apr-2017 Mauro Carvalho Chehab <mchehab@s-opensource.com>

Merge tag 'v4.11-rc5' into patchwork

Linux 4.11-rc5

* tag 'v4.11-rc5': (1168 commits)
Linux 4.11-rc5
tty: pl011: fix earlycon work-around for QDF2400 erratum 44
kasan: do not sanitize kexec p

Merge tag 'v4.11-rc5' into patchwork

Linux 4.11-rc5

* tag 'v4.11-rc5': (1168 commits)
Linux 4.11-rc5
tty: pl011: fix earlycon work-around for QDF2400 erratum 44
kasan: do not sanitize kexec purgatory
drivers/rapidio/devices/tsi721.c: make module parameter variable name unique
mm/hugetlb.c: don't call region_abort if region_chg fails
kasan: report only the first error by default
hugetlbfs: initialize shared policy as part of inode allocation
mm: fix section name for .data..ro_after_init
mm, hugetlb: use pte_present() instead of pmd_present() in follow_huge_pmd()
mm: workingset: fix premature shadow node shrinking with cgroups
mm: rmap: fix huge file mmap accounting in the memcg stats
mm: move mm_percpu_wq initialization earlier
mm: migrate: fix remove_migration_pte() for ksm pages
nfs: flexfiles: fix kernel OOPS if MDS returns unsupported DS type
NFSv4.1 fix infinite loop on IO BAD_STATEID error
serial: 8250_EXAR: fix duplicate Kconfig text and add missing help text
tty/serial: atmel: fix TX path in atmel_console_write()
tty/serial: atmel: fix race condition (TX+DMA)
serial: mxs-auart: Fix baudrate calculation
irqchip/mips-gic: Fix Local compare interrupt
...

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# 03b22057 03-Apr-2017 Dmitry Torokhov <dmitry.torokhov@gmail.com>

Merge tag 'v4.11-rc5' into next

Sync up with mainline to bring in changes to input subsystem merged
through other trees.


# a8e28440 03-Apr-2017 Al Viro <viro@zeniv.linux.org.uk>

Merge branch 'work.statx' into for-next


# bee3f412 02-Apr-2017 Al Viro <viro@zeniv.linux.org.uk>

Merge branch 'parisc-4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux into uaccess.parisc


# 840c91dc 27-Mar-2017 James Morris <james.l.morris@oracle.com>

update to v4.11-rc4 due to memory corruption bug in rc2


# 1c816bad 27-Mar-2017 Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 4.11-rc4 into staging-next

We need the IIO fixes in here as well to handle merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


Revision tags: v4.10.6
# 2e6d603e 24-Mar-2017 Herbert Xu <herbert@gondor.apana.org.au>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux

Merging 4.11-rc3 to pick up md5 removal from /dev/random.


# 628d4c46 23-Mar-2017 Daniel Vetter <daniel.vetter@ffwll.ch>

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux into drm-misc-next

Resync with drm-next, I have a patch which currently can't be applied
because drm-misc-next lacked the lates

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux into drm-misc-next

Resync with drm-next, I have a patch which currently can't be applied
because drm-misc-next lacked the latest drm/i915 code.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

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# aa18bc8d 23-Mar-2017 Daniel Vetter <daniel.vetter@ffwll.ch>

Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued

Backmerge drm-next to get at the hdmi2.0 helper functions.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>


# 4ccb6aea 23-Mar-2017 Ingo Molnar <mingo@kernel.org>

Merge branch 'linus' into x86/asm, to refresh the topic tree with fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>


# 65d1086c 22-Mar-2017 Dave Airlie <airlied@redhat.com>

BackMerge tag 'v4.11-rc3' into drm-next

Linux 4.11-rc3 as requested by Daniel


Revision tags: v4.10.5, v4.10.4
# 79a21d57 17-Mar-2017 Thomas Gleixner <tglx@linutronix.de>

Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/urgent

Pull a single UEFI fix from Ard:

- Reduce the severity of the notice that appears when the ESRT table

Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/urgent

Pull a single UEFI fix from Ard:

- Reduce the severity of the notice that appears when the ESRT table points
to memory that is not covered by the memory map. It is scaring our users
and interfering with their nice splash screens. Note that the ESRT may still
be perfectly usable, and is currently (to my knowledge) not widely used to
begin with.

show more ...


# 101c4314 15-Mar-2017 David S. Miller <davem@davemloft.net>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Conflicts:
drivers/net/ethernet/broadcom/genet/bcmgenet.c
net/core/sock.c

Conflicts were overlapping changes in bcmgenet and the
lock

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Conflicts:
drivers/net/ethernet/broadcom/genet/bcmgenet.c
net/core/sock.c

Conflicts were overlapping changes in bcmgenet and the
lockdep handling of sockets.

Signed-off-by: David S. Miller <davem@davemloft.net>

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Revision tags: v4.10.3, v4.10.2
# c3abcabe 07-Mar-2017 Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
"This includes a fix for a crash if certain special addresses are
k

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
"This includes a fix for a crash if certain special addresses are
kprobed, plus does a rename of two Kconfig variables that were a minor
misnomer"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS
kprobes/x86: Fix kernel panic when certain exception-handling addresses are probed

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# 84e5b549 07-Mar-2017 Ingo Molnar <mingo@kernel.org>

Merge tag 'perf-core-for-mingo-4.11-20170306' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

New fea

Merge tag 'perf-core-for-mingo-4.11-20170306' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

New features:

- Allow sorting by symbol_size in 'perf report' and 'perf top' (Charles Baylis)

E.g.:

# perf report -s symbol_size,symbol

Samples: 9K of event 'cycles:k', Event count (approx.): 2870461623
Overhead Symbol size Symbol
14.55% 326 [k] flush_tlb_mm_range
7.20% 1045 [k] filemap_map_pages
5.82% 124 [k] vma_interval_tree_insert
5.18% 2430 [k] unmap_page_range
2.57% 571 [k] vma_interval_tree_remove
1.94% 494 [k] page_add_file_rmap
1.82% 740 [k] page_remove_rmap
1.66% 1017 [k] release_pages
1.57% 1636 [k] update_blocked_averages
1.57% 76 [k] unlock_page

- Add support for -p/--pid, -a/--all-cpus and -C/--cpu in 'perf ftrace' (Namhyung Kim)

Change in behaviour:

- Make system wide (-a) the default option if no target was specified and one
of following conditions is met:

- No workload specified (current behaviour)

- A workload is specified but all requested events are system wide ones,
like uncore ones. (Jiri Olsa)

Fixes:

- Add missing initialization to the instruction decoder used in the
intel PT/BTS code, which was causing lots of failures in 'perf test',
looking for a value when there was none (Adrian Hunter)

Infrastructure changes:

- Add arch code needed to adopt the kernel's refcount_t to aid in
catching bugs when using atomic_t as a reference counter, basically
cmpxchg related functions (Arnaldo Carvalho de Melo)

- Convert the code using atomic_t as reference counts to refcount_t
(Elena Rashetova)

- Add feature test for sched_getcpu() to more easily check for its
presence in the many libc implementations and accross different
versions of such C libraries (Arnaldo Carvalho de Melo)

- Issue a HW watchdog disable hint in 'perf stat' for when some of the
requested events can't get counted because a PMU counter is taken by that
watchdog (Borislav Petkov).

- Add mapping for Intel's KnightsMill PMU events (Karol Wachowski)

Documentation changes:

- Clarify the term 'convergence' in:

perf bench numa numa-mem -h --show_convergence (Jiri Olsa)

Kernel code changes:

- Ensure probe location is at function entry in kretprobes (Naveen N. Rao)

- Allow return probes with offsets and absolute addresses (Naveen N. Rao)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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# 75013fb1 28-Feb-2017 Masami Hiramatsu <mhiramat@kernel.org>

kprobes/x86: Fix kernel panic when certain exception-handling addresses are probed

Fix to the exception table entry check by using probed address
instead of the address of copied instruction.

This

kprobes/x86: Fix kernel panic when certain exception-handling addresses are probed

Fix to the exception table entry check by using probed address
instead of the address of copied instruction.

This bug may cause unexpected kernel panic if user probe an address
where an exception can happen which should be fixup by __ex_table
(e.g. copy_from_user.)

Unless user puts a kprobe on such address, this doesn't
cause any problem.

This bug has been introduced years ago, by commit:

464846888d9a ("x86/kprobes: Fix a bug which can modify kernel code permanently").

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 464846888d9a ("x86/kprobes: Fix a bug which can modify kernel code permanently")
Link: http://lkml.kernel.org/r/148829899399.28855.12581062400757221722.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Revision tags: v4.10.1
# e98bdb30 25-Feb-2017 Mike Marshall <hubcap@omnibond.com>

Merge tag 'v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into for-next

Linux 4.10


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