diff options
| author |   Yu Zhao <yuzhao@google.com> | 2018-09-27 17:05:04 -0600 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2018-10-01 09:14:03 +0200 |
| commit | 1db58529454742f67ebd96e3588315e880b72837 (patch) | |
| tree | 2cbfe62e909d07a01a7b27e9278149253b4aa8a1 /security | |
| parent | mac80211: fix setting IEEE80211_KEY_FLAG_RX_MGMT for AP mode keys (diff) | |
| download | linux-dev-1db58529454742f67ebd96e3588315e880b72837.tar.xz linux-dev-1db58529454742f67ebd96e3588315e880b72837.zip | |
cfg80211: fix use-after-free in reg_process_hint()
reg_process_hint_country_ie() can free regulatory_request and return
REG_REQ_ALREADY_SET. We shouldn't use regulatory_request after it's
called. KASAN error was observed when this happens.
BUG: KASAN: use-after-free in reg_process_hint+0x839/0x8aa [cfg80211]
Read of size 4 at addr ffff8800c430d434 by task kworker/1:3/89
<snipped>
Workqueue: events reg_todo [cfg80211]
Call Trace:
dump_stack+0xc1/0x10c
? _atomic_dec_and_lock+0x1ad/0x1ad
? _raw_spin_lock_irqsave+0xa0/0xd2
print_address_description+0x86/0x26f
? reg_process_hint+0x839/0x8aa [cfg80211]
kasan_report+0x241/0x29b
reg_process_hint+0x839/0x8aa [cfg80211]
reg_todo+0x204/0x5b9 [cfg80211]
process_one_work+0x55f/0x8d0
? worker_detach_from_pool+0x1b5/0x1b5
? _raw_spin_unlock_irq+0x65/0xdd
? _raw_spin_unlock_irqrestore+0xf3/0xf3
worker_thread+0x5dd/0x841
? kthread_parkme+0x1d/0x1d
kthread+0x270/0x285
? pr_cont_work+0xe3/0xe3
? rcu_read_unlock_sched_notrace+0xca/0xca
ret_from_fork+0x22/0x40
Allocated by task 2718:
set_track+0x63/0xfa
__kmalloc+0x119/0x1ac
regulatory_hint_country_ie+0x38/0x329 [cfg80211]
__cfg80211_connect_result+0x854/0xadd [cfg80211]
cfg80211_rx_assoc_resp+0x3bc/0x4f0 [cfg80211]
smsc95xx v1.0.6
ieee80211_sta_rx_queued_mgmt+0x1803/0x7ed5 [mac80211]
ieee80211_iface_work+0x411/0x696 [mac80211]
process_one_work+0x55f/0x8d0
worker_thread+0x5dd/0x841
kthread+0x270/0x285
ret_from_fork+0x22/0x40
Freed by task 89:
set_track+0x63/0xfa
kasan_slab_free+0x6a/0x87
kfree+0xdc/0x470
reg_process_hint+0x31e/0x8aa [cfg80211]
reg_todo+0x204/0x5b9 [cfg80211]
process_one_work+0x55f/0x8d0
worker_thread+0x5dd/0x841
kthread+0x270/0x285
ret_from_fork+0x22/0x40
<snipped>
Signed-off-by: Yu Zhao <yuzhao@google.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions