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7622236ceb
linux/tools/perf
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Vince Weaver 7622236ceb perf header: Fix divide by zero error if f_header.attr_size==0 
So I have been having lots of trouble with hand-crafted perf.data files
causing segfaults and the like, so I have started fuzzing the perf tool.

First issue found:

If f_header.attr_size is 0 in the perf.data file, then perf will crash
with a divide-by-zero error.

Committer note:

Added a pr_err() to tell the user why the command failed.

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1907231100440.14532@macbook-air
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-07-29 09:03:43 -03:00
..
arch tools include UAPI: Sync x86's syscalls_64.tbl and generic unistd.h to pick up clone3 and pidfd_open 2019-07-26 12:31:28 -03:00
bench perf tools: Use zfree() where applicable 2019-07-09 10:13:27 -03:00
Documentation perf/urgent fixes: 2019-07-23 23:41:33 +02:00
examples/bpf perf augmented_raw_syscalls: Move reading filename to the loop 2019-06-05 09:48:55 -03:00
include/bpf perf bpf: Automatically add BTF ELF markers 2019-03-06 09:45:37 -03:00
jvmti tools build: Check if gettid() is available before providing helper 2019-07-07 17:53:09 -03:00
pmu-events perf vendor events s390: Add JSON files for machine type 8561 2019-07-12 13:51:59 -03:00
python treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 407 2019-06-05 17:37:14 +02:00
scripts perf scripts python: export-to-postgresql.py: Export switch events 2019-07-10 13:05:12 -03:00
tests perf test: Auto bump rlimit(MEMLOCK) for BPF test sake 2019-07-09 16:27:01 -03:00
trace tools perf beauty: Fix usbdevfs_ioctl table generator to handle _IOC() 2019-07-29 09:03:42 -03:00
ui perf hists browser: Fix potential NULL pointer dereference found by the smatch tool 2019-07-09 10:13:27 -03:00
util perf header: Fix divide by zero error if f_header.attr_size==0 2019-07-29 09:03:43 -03:00
.gitignore
Build
builtin-annotate.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-bench.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-buildid-cache.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-buildid-list.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-c2c.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-config.c perf tools: Add missing headers, mostly stdlib.h 2019-07-09 10:13:22 -03:00
builtin-data.c
builtin-diff.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-evlist.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-ftrace.c perf tools: Use list_del_init() more thorougly 2019-07-09 10:13:27 -03:00
builtin-help.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-inject.c perf inject: The tool->read() call may pass a NULL evsel, handle it 2019-07-09 09:33:55 -03:00
builtin-kallsyms.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 251 2019-06-05 17:30:26 +02:00
builtin-kmem.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-kvm.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-list.c perf list: Output tool events 2019-04-01 14:49:25 -03:00
builtin-lock.c perf tools: Use list_del_init() more thorougly 2019-07-09 10:13:27 -03:00
builtin-mem.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-probe.c perf probe: Avoid calling freeing routine multiple times for same pointer 2019-07-23 09:04:41 -03:00
builtin-record.c perf tools: Use zfree() where applicable 2019-07-09 10:13:27 -03:00
builtin-report.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-sched.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-script.c perf script: Fix off by one in brstackinsn IPC computation 2019-07-23 08:59:37 -03:00
builtin-stat.c perf stat: Fix segfault for event group in repeat mode 2019-07-23 09:00:05 -03:00
builtin-timechart.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
builtin-top.c perf top: Fix potential NULL pointer dereference detected by the smatch tool 2019-07-09 09:33:54 -03:00
builtin-trace.c perf trace: Auto bump rlimit(MEMLOCK) for eBPF maps sake 2019-07-09 16:36:45 -03:00
builtin-version.c perf version: Fix segfault due to missing OPT_END() 2019-07-15 07:59:05 -03:00
builtin.h perf script: Add array bound checking to list_scripts 2019-03-11 16:33:19 -03:00
check-headers.sh tools perf: Move from sane_ctype.h obtained from git to the Linux's original 2019-06-25 21:02:47 -03:00
command-list.txt
CREDITS
design.txt
Makefile
Makefile.config tools build: Check if gettid() is available before providing helper 2019-07-07 17:53:09 -03:00
Makefile.perf Linux 5.2-rc3 2019-06-03 11:56:35 +02:00
MANIFEST tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
perf-archive.sh
perf-completion.sh
perf-read-vdso.c
perf-sys.h
perf-with-kcore.sh Merge branch 'x86/cpu' into perf/core, to pick up dependent changes 2019-06-17 12:29:16 +02:00
perf.c tools lib: Adopt zalloc()/zfree() from tools/perf 2019-07-09 10:13:26 -03:00
perf.h perf tools: Increase MAX_NR_CPUS and MAX_CACHES 2019-06-25 08:47:10 -03:00