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| author | Tony Jones <tonyj@suse.de> | 2019-02-28 04:55:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-05 23:31:29 +0300 |
| commit | d63dc6f9f4e97c56a09cc1d49b8e562929a315ab (patch) | |
| tree | 8429dae78a0b9914e7e5c64215cf916156b539d4 | |
| parent | c263daec8bfec0e12e5e3077efee65fbd1a61637 (diff) | |
| download | linux-d63dc6f9f4e97c56a09cc1d49b8e562929a315ab.tar.xz | |
tools lib traceevent: Fix buffer overflow in arg_eval
[ Upstream commit 7c5b019e3a638a5a290b0ec020f6ca83d2ec2aaa ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 9a17bc27296e..3955ba9e6fcb 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2430,7 +2430,7 @@ static int arg_num_eval(struct print_arg *arg, long long *val) static char *arg_eval (struct print_arg *arg) { long long val; - static char buf[20]; + static char buf[24]; switch (arg->type) { case PRINT_ATOM: |