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| author | Edward Cree <ecree@solarflare.com> | 2017-12-18 20:11:53 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2017-12-21 02:15:41 +0100 |
| commit | 4374f256ce8182019353c0c639bb8d0695b4c941 (patch) | |
| tree | 8cc5cc5ecf8b7b1414810542b540b9b7bb3831e6 /tools | |
| parent | 19c832ed9b8f7b49fa5eeef06b4338af5fe5c1dc (diff) | |
| download | linux-4374f256ce8182019353c0c639bb8d0695b4c941.tar.gz linux-4374f256ce8182019353c0c639bb8d0695b4c941.tar.bz2 linux-4374f256ce8182019353c0c639bb8d0695b4c941.zip | |
bpf/verifier: fix bounds calculation on BPF_RSH
Incorrect signed bounds were being computed.
If the old upper signed bound was positive and the old lower signed bound was
negative, this could cause the new upper signed bound to be too low,
leading to security issues.
Fixes: b03c9f9fdc37 ("bpf/verifier: track signed and unsigned min/max values")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
[jannh@google.com: changed description to reflect bug impact]
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions