From: coverity-bot <keescook@chromium.org>
To: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
linux-next@vger.kernel.org
Subject: Coverity: _iwl_dbgfs_fw_dbg_domain_write(): Insecure data handling
Date: Mon, 4 Nov 2019 09:42:21 -0800 [thread overview]
Message-ID: <201911040942.30D0EBA@keescook> (raw)
Hello!
This is an experimental automated report about issues detected by Coverity
from a scan of next-20191031 as part of the linux-next weekly scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan
You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by recent commits:
068893b7a28f ("iwlwifi: dbg_ini: support domain changing via debugfs")
Coverity reported the following:
*** CID 1487394: Insecure data handling (TAINTED_SCALAR)
/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c: 355 in _iwl_dbgfs_fw_dbg_domain_write()
349 size_t size, char *buf)
350 {
351 return scnprintf(buf, size, "0x%08x\n",
352 fwrt->trans->dbg.domains_bitmap);
353 }
354
vvv CID 1487394: Insecure data handling (TAINTED_SCALAR)
vvv Passing tainted variable "buf" to a tainted sink.
355 FWRT_DEBUGFS_READ_WRITE_FILE_OPS(fw_dbg_domain, 20);
356
357 void iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,
358 struct dentry *dbgfs_dir)
359 {
360 INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);
361 FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200);
362 FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200);
363 FWRT_DEBUGFS_ADD_FILE(fw_dbg_domain, dbgfs_dir, 0600);
If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1487394 ("Insecure data handling")
Fixes: 068893b7a28f ("iwlwifi: dbg_ini: support domain changing via debugfs")
Thanks for your attention!
--
Coverity-bot
next reply other threads:[~2019-11-04 17:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 17:42 coverity-bot [this message]
2019-11-25 10:35 ` Coverity: _iwl_dbgfs_fw_dbg_domain_write(): Insecure data handling Luciano Coelho
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