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Filename Latest commit message Latest commit date
Masami Hiramatsu 8043d5ee91 perf probe: Fix memory leakage when the probe point is not found 
[ Upstream commit 12d572e785b15bc764e956caaa8a4c846fd15694 ]

Fix the memory leakage in debuginfo__find_trace_events() when the probe
point is not found in the debuginfo. If there is no probe point found in
the debuginfo, debuginfo__find_probes() will NOT return -ENOENT, but 0.

Thus the caller of debuginfo__find_probes() must check the tf.ntevs and
release the allocated memory for the array of struct probe_trace_event.

The current code releases the memory only if the debuginfo__find_probes()
hits an error but not checks tf.ntevs. In the result, the memory allocated
on *tevs are not released if tf.ntevs == 0.

This fixes the memory leakage by checking tf.ntevs == 0 in addition to
ret < 0.

Fixes: ff74178350 ("perf probe: Introduce debuginfo to encapsulate dwarf information")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/159438668346.62703.10887420400718492503.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-26 10:40:48 +02:00
arch x86/boot: kbuild: allow readelf executable to be specified 2020-08-26 10:40:46 +02:00
block
certs
crypto crypto: algif_aead - fix uninitialized ctx->init 2020-08-21 13:05:38 +02:00
Documentation kbuild: support LLVM=1 to switch the default tools to Clang/LLVM 2020-08-26 10:40:47 +02:00
drivers drm/vgem: Replace opencoded version of drm_gem_dumb_map_offset() 2020-08-26 10:40:47 +02:00
fs gfs2: Never call gfs2_block_zero_range with an open transaction 2020-08-26 10:40:48 +02:00
include iommu/vt-d: Enforce PASID devTLB field mask 2020-08-21 13:05:34 +02:00
init
ipc
kernel module: Correctly truncate sysfs sections output 2020-08-21 13:05:28 +02:00
lib test_kmod: avoid potential double free in trigger_config_run_type() 2020-08-21 13:05:37 +02:00
LICENSES
mm khugepaged: retract_page_tables() remember to test exit 2020-08-21 13:05:39 +02:00
net mac80211: fix misplaced while instead of if 2020-08-21 13:05:26 +02:00
samples
scripts recordmcount: Fix build failure on non arm64 2020-08-21 13:05:36 +02:00
security
sound ALSA: echoaudio: Fix potential Oops in snd_echo_resume() 2020-08-21 13:05:38 +02:00
tools perf probe: Fix memory leakage when the probe point is not found 2020-08-26 10:40:48 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-08-26 10:40:46 +02:00
Makefile kbuild: support LLVM=1 to switch the default tools to Clang/LLVM 2020-08-26 10:40:47 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.