================================================================== kasan: CONFIG_KASAN_INLINE enabled BUG: KASAN: stack-out-of-bounds in select_task_rq_fair+0x2b5d/0x3b60 kernel/sched/fair.c:6624 kasan: GPF could be caused by NULL-ptr deref or user memory access Read of size 4 at addr ffff8880a9dd12cc by task syz-executor0/12513 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: -1878635320 Comm: ÷ Not tainted 4.20.0+ #3 CPU: 1 PID: 12513 Comm: syz-executor0 Not tainted 4.20.0+ #3 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:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline] RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 Call Trace: Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 RSP: 0018:ffff8880ae607a80 EFLAGS: 00010006 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 RAX: 0000000000000000 RBX: 1ffff11015cc0f54 RCX: 0000000000000128 RDX: dffffc0000000000 RSI: 0000000000000028 RDI: 0000000000000140 RBP: ffff8880ae607b48 R08: ffff8880ae61f5f0 R09: fffffbfff1335ddd print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 R10: fffffbfff1301b45 R11: ffffffff899aeee3 R12: ffff8880a9e62240 R13: 000000000092a0b2 R14: 0000000000000003 R15: ffff8880ae607b20 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 0000000098244000 CR4: 00000000001406f0 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 select_task_rq_fair+0x2b5d/0x3b60 kernel/sched/fair.c:6624 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irqtime_account_process_tick.isra.0+0x3a2/0x490 kernel/sched/cputime.c:380 account_process_tick+0x27f/0x350 kernel/sched/cputime.c:483 update_process_times+0x25/0x80 kernel/time/timer.c:1633 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 select_task_rq kernel/sched/core.c:1536 [inline] try_to_wake_up+0x4ce/0x1480 kernel/sched/core.c:2041 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1637 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 Modules linked in: ====================================================== WARNING: possible circular locking dependency detected 4.20.0+ #3 Not tainted ------------------------------------------------------ syz-executor0/12513 is trying to acquire lock: 00000000a46d8062 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 0000000043e1d06c (report_lock){-...}, at: kasan_start_report mm/kasan/report.c:170 [inline] 0000000043e1d06c (report_lock){-...}, at: kasan_report_error mm/kasan/report.c:346 [inline] 0000000043e1d06c (report_lock){-...}, at: kasan_report mm/kasan/report.c:412 [inline] 0000000043e1d06c (report_lock){-...}, at: kasan_report+0x8d/0x110 mm/kasan/report.c:396 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (report_lock){-...}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 kasan_start_report mm/kasan/report.c:170 [inline] kasan_report_error mm/kasan/report.c:346 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report+0x8d/0x110 mm/kasan/report.c:396 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 select_task_rq_fair+0x2b5d/0x3b60 kernel/sched/fair.c:6624 select_task_rq kernel/sched/core.c:1536 [inline] try_to_wake_up+0x4ce/0x1480 kernel/sched/core.c:2041 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1637 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 loop3+0x290/0x37d sha256_avx2_update+0x2d/0x40 arch/x86/crypto/sha256_ssse3_glue.c:235 crypto_shash_update+0xcf/0x130 crypto/shash.c:116 ima_calc_file_hash_tfm+0x386/0x460 security/integrity/ima/ima_crypto.c:365 ima_calc_file_shash security/integrity/ima/ima_crypto.c:385 [inline] ima_calc_file_hash+0x1aa/0x570 security/integrity/ima/ima_crypto.c:450 ima_collect_measurement+0x5fc/0x710 security/integrity/ima/ima_api.c:231 process_measurement+0x11e4/0x1be0 security/integrity/ima/ima_main.c:286 ima_file_mmap+0x144/0x170 security/integrity/ima/ima_main.c:342 security_mmap_file+0x19f/0x1e0 security/security.c:949 vm_mmap_pgoff+0x12e/0x2b0 mm/util.c:346 ksys_mmap_pgoff+0x2d0/0x650 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 __up.isra.0+0x1c0/0x2a0 kernel/locking/semaphore.c:262 up+0x13e/0x1c0 kernel/locking/semaphore.c:187 __up_console_sem+0xb7/0x1c0 kernel/printk/printk.c:236 console_unlock+0x778/0x11e0 kernel/printk/printk.c:2426 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kobject_uevent_env+0x96/0x102b lib/kobject_uevent.c:467 call_crda net/wireless/reg.c:556 [inline] reg_query_database+0x27b/0x400 net/wireless/reg.c:1104 reg_process_hint_core net/wireless/reg.c:2339 [inline] reg_process_hint+0x1b3/0xf50 net/wireless/reg.c:2677 reg_process_pending_hints net/wireless/reg.c:2767 [inline] reg_todo+0x468/0xc00 net/wireless/reg.c:2844 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2242 console_trylock_spinning kernel/printk/printk.c:1662 [inline] vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kasan_start_report mm/kasan/report.c:171 [inline] kasan_report_error mm/kasan/report.c:346 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report+0x9d/0x110 mm/kasan/report.c:396 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 select_task_rq_fair+0x2b5d/0x3b60 kernel/sched/fair.c:6624 select_task_rq kernel/sched/core.c:1536 [inline] try_to_wake_up+0x4ce/0x1480 kernel/sched/core.c:2041 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1637 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 loop3+0x290/0x37d sha256_avx2_update+0x2d/0x40 arch/x86/crypto/sha256_ssse3_glue.c:235 crypto_shash_update+0xcf/0x130 crypto/shash.c:116 ima_calc_file_hash_tfm+0x386/0x460 security/integrity/ima/ima_crypto.c:365 ima_calc_file_shash security/integrity/ima/ima_crypto.c:385 [inline] ima_calc_file_hash+0x1aa/0x570 security/integrity/ima/ima_crypto.c:450 ima_collect_measurement+0x5fc/0x710 security/integrity/ima/ima_api.c:231 process_measurement+0x11e4/0x1be0 security/integrity/ima/ima_main.c:286 ima_file_mmap+0x144/0x170 security/integrity/ima/ima_main.c:342 security_mmap_file+0x19f/0x1e0 security/security.c:949 vm_mmap_pgoff+0x12e/0x2b0 mm/util.c:346 ksys_mmap_pgoff+0x2d0/0x650 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: (console_sem).lock --> &p->pi_lock --> report_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(report_lock); lock(&p->pi_lock); lock(report_lock); lock((console_sem).lock); *** DEADLOCK *** 4 locks held by syz-executor0/12513: #0: 0000000092e1b177 (&iint->mutex){+.+.}, at: process_measurement+0x41c/0x1be0 security/integrity/ima/ima_main.c:226 #1: 000000002301e07a (&p->pi_lock){-.-.}, at: try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965 #2: 000000007a973d5d (rcu_read_lock){....}, at: select_task_rq_fair+0x31f/0x3b60 kernel/sched/fair.c:6605 #3: 0000000043e1d06c (report_lock){-...}, at: kasan_start_report mm/kasan/report.c:170 [inline] #3: 0000000043e1d06c (report_lock){-...}, at: kasan_report_error mm/kasan/report.c:346 [inline] #3: 0000000043e1d06c (report_lock){-...}, at: kasan_report mm/kasan/report.c:412 [inline] #3: 0000000043e1d06c (report_lock){-...}, at: kasan_report+0x8d/0x110 mm/kasan/report.c:396 stack backtrace: CPU: 1 PID: 12513 Comm: syz-executor0 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x3014/0x4a30 kernel/locking/lockdep.c:3338 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2242 console_trylock_spinning kernel/printk/printk.c:1662 [inline] vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kasan_start_report mm/kasan/report.c:171 [inline] kasan_report_error mm/kasan/report.c:346 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report+0x9d/0x110 mm/kasan/report.c:396 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 select_task_rq_fair+0x2b5d/0x3b60 kernel/sched/fair.c:6624 select_task_rq kernel/sched/core.c:1536 [inline] try_to_wake_up+0x4ce/0x1480 kernel/sched/core.c:2041 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1637 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:loop3+0x290/0x37d Code: 7b f0 f2 06 45 21 d7 01 f1 45 31 f5 c4 63 7b f0 e1 0d 41 31 c7 c4 63 7b f0 f1 16 89 ce 45 31 e6 c4 63 7b f0 e1 02 03 5c 3c 38 <09> d6 45 31 e6 41 89 cc 44 21 c6 41 21 d4 45 01 ef 41 01 d9 44 09 RSP: 0018:ffff88806aaa7180 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: 0000000061c2fe7b RBX: 000000007c7bf6ec RCX: 000000002ea5ca33 RDX: 00000000f722303d RSI: 000000002ea5ca33 RDI: 0000000000000040 RBP: ffff88806aaa7428 R08: 000000008e2f1367 R09: 00000000c71005e2 R10: 00000000863843aa R11: 00000000095a5e15 R12: 00000000cba9728c R13: 00000000c369f345 R14: 00000000c6b1b994 R15: 0000000061dafe51 sha256_avx2_update+0x2d/0x40 arch/x86/crypto/sha256_ssse3_glue.c:235 crypto_shash_update+0xcf/0x130 crypto/shash.c:116 ima_calc_file_hash_tfm+0x386/0x4 security/integrity/ima/ima_crypto.c:365 Lost 59 message(s)! ---[ end trace cacef9c0bc3023fc ]--- RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline] RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 RSP: 0018:ffff8880ae607a80 EFLAGS: 00010006 RAX: 0000000000000000 RBX: 1ffff11015cc0f54 RCX: 0000000000000128 RDX: dffffc0000000000 RSI: 0000000000000028 RDI: 0000000000000140 RBP: ffff8880ae607b48 R08: ffff8880ae61f5f0 R09: fffffbfff1335ddd R10: fffffbfff1301b45 R11: ffffffff899aeee3 R12: ffff8880a9e62240 R13: 000000000092a0b2 R14: 0000000000000003 R15: ffff8880ae607b20 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 0000000098244000 CR4: 00000000001406f0 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RIP: 0010:loop3+0x290/0x37d