68 lines
2.8 KiB
Python
Executable File
68 lines
2.8 KiB
Python
Executable File
#!/usr/bin/python3
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#
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# Collect information about a kernel oops.
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#
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# Copyright (c) 2007 Canonical Ltd.
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# Author: Martin Pitt <martin.pitt@ubuntu.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version. See http://www.gnu.org/copyleft/gpl.html for
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# the full text of the license.
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import os, re, glob
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import apport, apport.fileutils
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pr = apport.Report('KernelCrash')
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package = apport.packaging.get_kernel_package()
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pr.add_package(package)
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pr.add_os_info()
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vmcore_path = os.path.join(apport.fileutils.report_dir, 'vmcore')
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# only accept plain files here, not symlinks; otherwise we might recursively
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# include the report, or similar DoS attacks
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if os.path.exists(vmcore_path + '.log'):
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try:
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log_fd = os.open(vmcore_path + '.log', os.O_RDONLY | os.O_NOFOLLOW)
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pr['VmCoreLog'] = (os.fdopen(log_fd, 'rb'),)
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os.unlink(vmcore_path + '.log')
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except OSError as e:
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apport.fatal('Cannot open vmcore log: ' + str(e))
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if os.path.exists(vmcore_path):
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try:
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core_fd = os.open(vmcore_path, os.O_RDONLY | os.O_NOFOLLOW)
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pr['VmCore'] = (os.fdopen(core_fd, 'rb'),)
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with apport.fileutils.make_report_file(pr) as f:
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pr.write(f)
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except (IOError, OSError) as e:
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apport.fatal('Cannot create report: ' + str(e))
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try:
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os.unlink(vmcore_path)
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except OSError:
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pass # huh, already gone?
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else:
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# check for kdump-tools generated dmesg in timestamped dir
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for dmesg_file in glob.glob(os.path.join(apport.fileutils.report_dir, '*', 'dmesg.*')):
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timedir = os.path.dirname(dmesg_file)
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timestamp = os.path.basename(timedir)
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if re.match('^[0-9]{12}$', timestamp):
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# we require the containing dir to be owned by root, to avoid users
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# creating a symlink to someplace else and disclosing data; we just
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# compare against euid here so that we can test this as non-root
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if os.lstat(timedir).st_uid != os.geteuid():
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apport.fatal('%s has unsafe permissions, ignoring' % timedir)
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report_name = package + '-' + timestamp + '.crash'
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try:
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crash_report = os.path.join(apport.fileutils.report_dir, report_name)
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dmesg_fd = os.open(dmesg_file, os.O_RDONLY | os.O_NOFOLLOW)
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pr['VmCoreDmesg'] = (os.fdopen(dmesg_fd, 'rb'),)
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# TODO: Replace with open(..., 'xb') once we drop Python 2 support
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with os.fdopen(os.open(crash_report, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o640), 'wb') as f:
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pr.write(f)
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except (IOError, OSError) as e:
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apport.fatal('Cannot create report: ' + str(e))
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