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/* PKCS#7 crypto data parser
 *
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#ifndef _CRYPTO_PKCS7_H
#define _CRYPTO_PKCS7_H

#include <linux/verification.h>
#include <crypto/public_key.h>

struct key;
struct pkcs7_message;

/*
 * pkcs7_parser.c
 */
extern struct pkcs7_message *pkcs7_parse_message(const void *data,
						 size_t datalen);
extern void pkcs7_free_message(struct pkcs7_message *pkcs7);

extern int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
				  const void **_data, size_t *_datalen,
				  size_t *_headerlen);

/*
 * pkcs7_trust.c
 */
extern int pkcs7_validate_trust(struct pkcs7_message *pkcs7,
				struct key *trust_keyring);

/*
 * pkcs7_verify.c
 */
extern int pkcs7_verify(struct pkcs7_message *pkcs7,
			enum key_being_used_for usage);

extern int pkcs7_supply_detached_data(struct pkcs7_message *pkcs7,
				      const void *data, size_t datalen);

#endif /* _CRYPTO_PKCS7_H */
_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/dcb/Kconfig')