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| author | Mark Brown <broonie@kernel.org> | 2020-12-11 17:47:55 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-12-11 17:47:55 +0000 |
| commit | 031616c434db05ce766f76c62865f55698e0924f (patch) | |
| tree | 7f29aa1ff3e7b51a8058cd570fb785c6e769b245 /security/integrity/evm/evm_main.c | |
| parent | 064841ccfc49b2315dc0b797239862d3a343aa07 (diff) | |
| parent | 85a7555575a0e48f9b73db310d0d762a08a46d63 (diff) | |
Merge remote-tracking branch 'asoc/for-5.10' into asoc-linus
Diffstat (limited to 'security/integrity/evm/evm_main.c')
| -rw-r--r-- | security/integrity/evm/evm_main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 0d36259b690d..76d19146d74b 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -59,6 +59,9 @@ static int __init evm_set_fixmode(char *str) { if (strncmp(str, "fix", 3) == 0) evm_fixmode = 1; + else + pr_err("invalid \"%s\" mode", str); + return 0; } __setup("evm=", evm_set_fixmode); @@ -181,6 +184,12 @@ static enum integrity_status evm_verify_hmac(struct dentry *dentry, break; case EVM_IMA_XATTR_DIGSIG: case EVM_XATTR_PORTABLE_DIGSIG: + /* accept xattr with non-empty signature field */ + if (xattr_len <= sizeof(struct signature_v2_hdr)) { + evm_status = INTEGRITY_FAIL; + goto out; + } + hdr = (struct signature_v2_hdr *)xattr_data; digest.hdr.algo = hdr->hash_algo; rc = evm_calc_hash(dentry, xattr_name, xattr_value, |