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| author |   Tony Jones <tonyj@suse.de> | 2019-02-27 17:55:32 -0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-02-28 16:06:47 -0300 |
| commit | 7c5b019e3a638a5a290b0ec020f6ca83d2ec2aaa (patch) | |
| tree | 4b1b8645e4c70ef97f96c08347681f778c3a2c7f /tools/lib/traceevent/event-parse.c | |
| parent | perf probe: Clarify error message about not finding kernel modules debuginfo (diff) | |
| download | linux-dev-7c5b019e3a638a5a290b0ec020f6ca83d2ec2aaa.tar.xz linux-dev-7c5b019e3a638a5a290b0ec020f6ca83d2ec2aaa.zip | |
tools lib traceevent: Fix buffer overflow in arg_eval
Fix buffer overflow observed when running perf test.
The overflow is when trying to evaluate "1ULL << (64 - 1)" which is
resulting in -9223372036854775808 which overflows the 20 character
buffer.
If is possible this bug has been reported before but I still don't see
any fix checked in:
See: https://www.spinics.net/lists/linux-perf-users/msg07714.html
Reported-by: Michael Sartain <mikesart@fastmail.com>
Reported-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Tony Jones <tonyj@suse.de>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Fixes: f7d82350e597 ("tools/events: Add files to create libtraceevent.a")
Link: http://lkml.kernel.org/r/20190228015532.8941-1-tonyj@suse.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/traceevent/event-parse.c')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index abd4fa5d3088..87494c7c619d 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2457,7 +2457,7 @@ static int arg_num_eval(struct tep_print_arg *arg, long long *val) static char *arg_eval (struct tep_print_arg *arg) { long long val; - static char buf[20]; + static char buf[24]; switch (arg->type) { case TEP_PRINT_ATOM: |