cannot load conntrack support for proto=7 ================================================================== kasan: CONFIG_KASAN_INLINE enabled BUG: KASAN: stack-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] BUG: KASAN: stack-out-of-bounds in refcount_inc_not_zero_checked+0x97/0x2f0 lib/refcount.c:120 kasan: GPF could be caused by NULL-ptr deref or user memory access Read of size 4 at addr ffff8881da9c0bf0 by task kworker/u4:1/21 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8057 Comm: syz-executor4 Not tainted 4.20.0-rc2+ #294 CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 4.20.0-rc2+ #294 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_object lib/debugobjects.c:157 [inline] RIP: 0010:debug_object_deactivate+0x191/0x450 lib/debugobjects.c:543 Workqueue: call_usermodehelper_exec_work (events_unbound) ------------[ cut here ]------------ Call Trace: Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object '$' (offset 224, size 64)! __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 WARNING: CPU: 0 PID: 8057 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] refcount_inc_not_zero_checked+0x97/0x2f0 lib/refcount.c:120 refcount_inc_checked+0x15/0x70 lib/refcount.c:153 kref_get include/linux/kref.h:47 [inline] aa_get_label security/apparmor/include/label.h:387 [inline] aa_get_newest_label security/apparmor/include/label.h:441 [inline] apparmor_cred_prepare+0x307/0x5a0 security/apparmor/lsm.c:80 security_prepare_creds+0x60/0xc0 security/security.c:1022 prepare_creds+0x3b9/0x4d0 kernel/cred.c:278 copy_creds+0x79/0x560 kernel/cred.c:344 copy_process+0x1266/0x87a0 kernel/fork.c:1784 _do_fork+0x1cb/0x11d0 kernel/fork.c:2216 kernel_thread+0x34/0x40 kernel/fork.c:2275 call_usermodehelper_exec_sync kernel/umh.c:130 [inline] call_usermodehelper_exec_work+0xc9/0x2f0 kernel/umh.c:182 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881da9c0040 which belongs to the cache of size -30591 The buggy address is located 33583 bytes to the right of -30591-byte region [ffff8881da9c0040, ffff8881da9b88c1) The buggy address belongs to the page: page:ffffea00076a7000 count:1 mapcount:0 mapping:ffff8881da800ac0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea00076a4108 ffffea0007650a08 ffff8881da800ac0 raw: 0000000000000000 ffff8881da9c0040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881da9c0a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 ffff8881da9c0b00: f1 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 00 00 00 >ffff8881da9c0b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 ^ ffff8881da9c0c00: f1 f8 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 ffff8881da9c0c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 ================================================================== Kernel Offset: disabled ====================================================== WARNING: possible circular locking dependency detected 4.20.0-rc2+ #294 Not tainted ------------------------------------------------------ syz-executor4/8057 is trying to acquire lock: 0000000019252f0a ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 000000003a11d92b (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0xf7/0x450 lib/debugobjects.c:541 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&obj_hash[i].lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 __debug_object_init+0x127/0x1290 lib/debugobjects.c:384 debug_object_init+0x16/0x20 lib/debugobjects.c:432 debug_hrtimer_init kernel/time/hrtimer.c:410 [inline] debug_init kernel/time/hrtimer.c:458 [inline] hrtimer_init+0x97/0x490 kernel/time/hrtimer.c:1308 init_dl_task_timer+0x1b/0x50 kernel/sched/deadline.c:1057 __sched_fork+0x2ae/0x590 kernel/sched/core.c:2166 init_idle+0x75/0x740 kernel/sched/core.c:5374 sched_init+0xb33/0xc07 kernel/sched/core.c:6060 start_kernel+0x4be/0xa2b init/main.c:608 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1126 [inline] task_fork_fair+0xb0/0x6d0 kernel/sched/fair.c:9768 sched_fork+0x443/0xba0 kernel/sched/core.c:2359 copy_process+0x25b8/0x87a0 kernel/fork.c:1887 _do_fork+0x1cb/0x11d0 kernel/fork.c:2216 kernel_thread+0x34/0x40 kernel/fork.c:2275 rest_init+0x28/0x372 init/main.c:409 arch_call_rest_init+0xe/0x1b start_kernel+0x9f0/0xa2b init/main.c:745 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 try_to_wake_up+0xdc/0x1490 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 __up.isra.1+0x1c0/0x2a0 kernel/locking/semaphore.c:262 up+0x13c/0x1c0 kernel/locking/semaphore.c:187 __up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:236 console_unlock+0x811/0x1190 kernel/printk/printk.c:2432 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 kobject_uevent_env+0x96/0x101e lib/kobject_uevent.c:467 call_crda net/wireless/reg.c:556 [inline] reg_query_database+0x283/0x400 net/wireless/reg.c:1104 reg_process_hint_core net/wireless/reg.c:2339 [inline] reg_process_hint+0x189/0xec0 net/wireless/reg.c:2677 reg_process_pending_hints net/wireless/reg.c:2767 [inline] reg_todo+0x49a/0xc20 net/wireless/reg.c:2844 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #0 ((console_sem).lock){-.-.}: other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->lock --> &obj_hash[i].lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&obj_hash[i].lock); lock(&rq->lock); lock(&obj_hash[i].lock); lock((console_sem).lock); *** DEADLOCK *** 5 locks held by syz-executor4/8057: #0: 000000001cf43636 (rcu_read_lock){....}, at: __skb_unlink include/linux/skbuff.h:1893 [inline] #0: 000000001cf43636 (rcu_read_lock){....}, at: __skb_dequeue include/linux/skbuff.h:1909 [inline] #0: 000000001cf43636 (rcu_read_lock){....}, at: process_backlog+0x1dd/0x7a0 net/core/dev.c:5855 #1: 000000001cf43636 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2126 [inline] #1: 000000001cf43636 (rcu_read_lock){....}, at: ip_local_deliver_finish+0x13d/0x390 net/ipv4/ip_input.c:231 #2: 000000005ccb0f38 (hrtimer_bases.lock){-.-.}, at: hrtimer_interrupt+0xfc/0x780 kernel/time/hrtimer.c:1499 #3: 000000003a11d92b (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0xf7/0x450 lib/debugobjects.c:541 #4: 000000001cf43636 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329 stack backtrace: CPU: 0 PID: 8057 Comm: syz-executor4 Not tainted 4.20.0-rc2+ #294 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Rebooting in 86400 seconds..