mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity
linux-stable/tools/lib
History
Ian Rogers d0e2f7ae04 libperf evlist: Avoid out-of-bounds access 
[ Upstream commit 1947b92464 ]

Parallel testing appears to show a race between allocating and setting
evsel ids. As there is a bounds check on the xyarray it yields a segv
like:

```
AddressSanitizer:DEADLYSIGNAL

=================================================================

==484408==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010

==484408==The signal is caused by a WRITE memory access.

==484408==Hint: address points to the zero page.

    #0 0x55cef5d4eff4 in perf_evlist__id_hash tools/lib/perf/evlist.c:256
    #1 0x55cef5d4f132 in perf_evlist__id_add tools/lib/perf/evlist.c:274
    #2 0x55cef5d4f545 in perf_evlist__id_add_fd tools/lib/perf/evlist.c:315
    #3 0x55cef5a1923f in store_evsel_ids util/evsel.c:3130
    #4 0x55cef5a19400 in evsel__store_ids util/evsel.c:3147
    #5 0x55cef5888204 in __run_perf_stat tools/perf/builtin-stat.c:832
    #6 0x55cef5888c06 in run_perf_stat tools/perf/builtin-stat.c:960
    #7 0x55cef58932db in cmd_stat tools/perf/builtin-stat.c:2878
...
```

Avoid this crash by early exiting the perf_evlist__id_add_fd and
perf_evlist__id_add is the access is out-of-bounds.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240229070757.796244-1-irogers@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2024-04-13 13:07:36 +02:00
..
api libapi: Add missing linux/types.h header to get the __u64 type on io.h 2024-01-25 15:35:51 -08:00
bpf libbpf: Use OPTS_SET() macro in bpf_xdp_query() 2024-03-26 18:19:26 -04:00
perf libperf evlist: Avoid out-of-bounds access 2024-04-13 13:07:36 +02:00
subcmd libsubcmd: Fix memory leak in uniq() 2024-02-05 20:14:32 +00:00
symbol tools lib symbol: Add dependency test to install_headers 2022-12-14 11:16:12 -03:00
thermal tools/lib/thermal: Fix include path for libnl3 in pkg-config file. 2023-02-15 17:29:40 +01:00
argv_split.c
…
bitmap.c
…
ctype.c
…
find_bit.c
…
hweight.c
…
list_sort.c
…
rbtree.c
…
slab.c
…
str_error_r.c
…
string.c
…
vsprintf.c
…
zalloc.c
…