Subject: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)

From: Sergey Senozhatsky <[email-masked]>
Date: Tue, 11 Oct 2016 00:03:58 +0900

Hello,

current -git kills my system. adding

	if (!virt_addr_valid(&aad[2])) {
		WARN_ON(1);
		return -EINVAL;
	}

to ieee80211_aes_ccm_decrypt() given the following backtrace

 WARNING: CPU: 5 PID: 252 at net/mac80211/aes_ccm.c:77 ieee80211_aes_ccm_decrypt+0xc8/0x197
 CPU: 5 PID: 252 Comm: irq/29-iwlwifi Tainted: G        W       4.8.0-next-20161010-dbg-00007-g79797e9-dirty #88
  ffffc90000413638 ffffffff811ff0e3 0000000000000000 0000000000000000
  ffffc90000413678 ffffffff8103fe91 0000004d000001c8 1ffff920000826d3
  ffff88040fc526d8 0000000000000008 ffffc90000413978 ffffc9000041397a
 Call Trace:
  [<ffffffff811ff0e3>] dump_stack+0x4f/0x65
  [<ffffffff8103fe91>] __warn+0xc2/0xdd
  [<ffffffff8103ff1c>] warn_slowpath_null+0x1d/0x1f
  [<ffffffff8142aaa5>] ieee80211_aes_ccm_decrypt+0xc8/0x197
  [<ffffffff810ed595>] ? __put_page+0x3c/0x3f
  [<ffffffff8131fa42>] ? put_page+0x4a/0x62
  [<ffffffff813218d3>] ? __pskb_pull_tail+0x1e8/0x279
  [<ffffffff8141a7dc>] ? ccmp_special_blocks.isra.5+0x51/0x12d
  [<ffffffff8141b226>] ieee80211_crypto_ccmp_decrypt+0x1ba/0x221
  [<ffffffff81432e80>] ieee80211_rx_handlers+0x52a/0x19c2
  [<ffffffff81070000>] ? start_dl_timer+0xa8/0xb4
  [<ffffffff8107462d>] ? put_lock_stats.isra.24+0xe/0x20
  [<ffffffff8108ebec>] ? del_timer+0x57/0x61
  [<ffffffff814351a8>] ieee80211_prepare_and_rx_handle+0xcd6/0xd2a
  [<ffffffff810742a5>] ? local_clock+0x10/0x12
  [<ffffffff8107642b>] ? __lock_acquire.isra.31+0x202/0x57e
  [<ffffffff8143207b>] ? rcu_read_unlock+0x23/0x23
  [<ffffffff81066e77>] ? sched_clock_cpu+0x17/0xc6
  [<ffffffff814357ab>] ieee80211_rx_napi+0x5af/0x698
  [<ffffffff810742c0>] ? get_lock_stats+0x19/0x50
  [<ffffffff8107462d>] ? put_lock_stats.isra.24+0xe/0x20
  [<ffffffffa023aaa9>] iwl_mvm_rx_rx_mpdu+0x5ab/0x60c [iwlmvm]
  [<ffffffff810742c0>] ? get_lock_stats+0x19/0x50
  [<ffffffffa0235c80>] iwl_mvm_rx+0x45/0x69 [iwlmvm]
  [<ffffffffa01a989e>] iwl_pcie_rx_handle+0x478/0x584 [iwlwifi]
  [<ffffffffa01aaafd>] iwl_pcie_irq_handler+0x39c/0x52d [iwlwifi]
  [<ffffffff81080824>] ? irq_finalize_oneshot+0xa7/0xa7
  [<ffffffff81080841>] irq_thread_fn+0x1d/0x34
  [<ffffffff81080ab5>] irq_thread+0xe6/0x1bb
  [<ffffffff8108093a>] ? wake_threads_waitq+0x2c/0x2c
  [<ffffffff810809cf>] ? irq_thread_dtor+0x95/0x95
  [<ffffffff81059d79>] kthread+0xc6/0xce
  [<ffffffff8107462d>] ? put_lock_stats.isra.24+0xe/0x20
  [<ffffffff81059cb3>] ? __list_del_entry+0x22/0x22
  [<ffffffff814669d2>] ret_from_fork+0x22/0x30
 ---[ end trace 94da6d4698b938b2 ]---

	-ss