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| author | Thomas Weißschuh <[email protected]> | 2023-07-26 08:08:13 +0200 |
|---|---|---|
| committer | Willy Tarreau <[email protected]> | 2023-08-23 05:17:07 +0200 |
| commit | 447e56023fc281c588e4977add552f4d49d78b22 (patch) | |
| tree | 2f20d212ca59452e609c464b3484dcc00be4f296 /net/lapb/lapb_subr.c | |
| parent | 4893c22eb2f4364bc037e9451dfc3bd36a231901 (diff) | |
selftests/nolibc: avoid buffer underrun in space printing
If the test description is longer than the status alignment the
parameter 'n' to putcharn() would lead to a signed underflow that then
gets converted to a very large unsigned value.
This in turn leads out-of-bound writes in memset() crashing the
application.
The failure case of EXPECT_PTRER() used in "mmap_bad" exhibits this
exact behavior.
Fixes: 29f5540be392 ("selftests/nolibc: add EXPECT_PTREQ, EXPECT_PTRNE and EXPECT_PTRER")
Signed-off-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Willy Tarreau <[email protected]>
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions