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selftests/bpf: Fix OOB write in test_verifier

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The commit referenced below added fixup_map_timer support (to create a
BPF map containing timers), but failed to increase the size of the
map_fds array, leading to out of bounds write. Fix this by changing
MAX_NR_MAPS to 22.

Fixes: e60e6962c5 ("selftests/bpf: Add tests for restricted helpers")
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211214014800.78762-1-memxor@gmail.com
This commit is contained in:
Kumar Kartikeya Dwivedi 2021-12-14 07:18:00 +05:30 committed by Daniel Borkmann
parent bd0687c18e
commit f7abc4c8df
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/bpf/test_verifier.c
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@ -54,7 +54,7 @@
#define MAX_INSNS BPF_MAXINSNS #define MAX_INSNS BPF_MAXINSNS
#define MAX_TEST_INSNS 1000000 #define MAX_TEST_INSNS 1000000
#define MAX_FIXUPS 8 #define MAX_FIXUPS 8
#define MAX_NR_MAPS 21 #define MAX_NR_MAPS 22
#define MAX_TEST_RUNS 8 #define MAX_TEST_RUNS 8
#define POINTER_VALUE 0xcafe4all #define POINTER_VALUE 0xcafe4all
#define TEST_DATA_LEN 64 #define TEST_DATA_LEN 64