random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) ================================================================== ------------[ cut here ]------------ BUG: KASAN: slab-out-of-bounds in memset include/linux/string.h:330 [inline] BUG: KASAN: slab-out-of-bounds in vmac_final+0x161/0x26a0 crypto/vmac.c:611 ODEBUG: deactivate not available (active state 0) object type: timer_list hint: process_timeout+0x0/0x40 kernel/time/timer.c:1423 Write of size 18446744073709551516 at addr ffff8801cef677cc by task syz-executor217/6484 WARNING: CPU: 0 PID: 6468 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6484 Comm: syz-executor217 Not tainted 4.17.0+ #98 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+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe 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 memset+0x23/0x40 mm/kasan/kasan.c:285 memset include/linux/string.h:330 [inline] vmac_final+0x161/0x26a0 crypto/vmac.c:611 crypto_shash_final+0x104/0x260 crypto/shash.c:152 shash_async_final+0x35/0x40 crypto/shash.c:252 crypto_ahash_op+0xcf/0x180 crypto/ahash.c:362 crypto_ahash_final+0x57/0x70 crypto/ahash.c:367 hash_sendmsg+0x750/0xac0 crypto/algif_hash.c:126 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 ___sys_sendmsg+0x805/0x940 net/socket.c:2161 __sys_sendmsg+0x115/0x270 net/socket.c:2199 __do_sys_sendmsg net/socket.c:2208 [inline] __se_sys_sendmsg net/socket.c:2206 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2206 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446af9 Code: e8 4c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b 56 00 00 c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4c7cca3ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000006dcc5c RCX: 0000000000446af9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000008 RBP: 00000000006dcc58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff3230487f R14: 00007f4c7cca49c0 R15: 000000000000000b CPU: 0 PID: 6468 Comm: syz-executor217 Not tainted 4.17.0+ #98 Allocated by task 6468: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 Call Trace: set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 kmalloc include/linux/slab.h:518 [inline] kzalloc include/linux/slab.h:706 [inline] crypto_create_tfm+0x87/0x310 crypto/api.c:464 crypto_init_shash_ops_async+0x5d/0x3e4 crypto/shash.c:357 crypto_ahash_init_tfm+0x357/0x430 crypto/ahash.c:458 panic+0x22f/0x4de kernel/panic.c:184 crypto_create_tfm+0xe9/0x310 crypto/api.c:471 crypto_alloc_tfm+0x1b5/0x2d0 crypto/api.c:543 crypto_alloc_ahash+0x2c/0x40 crypto/ahash.c:539 hash_bind+0x25/0x30 crypto/algif_hash.c:408 alg_bind+0x2be/0x560 crypto/af_alg.c:183 __sys_bind+0x331/0x440 net/socket.c:1528 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 __do_sys_bind net/socket.c:1539 [inline] __se_sys_bind net/socket.c:1537 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1537 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 report_bug+0x252/0x2d0 lib/bug.c:186 entry_SYSCALL_64_after_hwframe+0x49/0xbe fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 Freed by task 3238: (stack is not available) The buggy address belongs to the object at ffff8801cef675c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 12 bytes to the right of 512-byte region [ffff8801cef675c0, ffff8801cef677c0) The buggy address belongs to the page: page:ffffea00073bd9c0 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 flags: 0x2fffc0000000100(slab) RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326 raw: 02fffc0000000100 ffffea00073bd848 ffffea00073a4748 ffff8801da800940 Code: raw: 0000000000000000 ffff8801cef670c0 0000000100000006 0000000000000000 1a page dumped because: kasan: bad access detected 88 48 Memory state around the buggy address: 89 ffff8801cef67680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa ffff8801cef67700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc 48 >ffff8801cef67780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc c1 ^ ea 03 ffff8801cef67800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb 80 ffff8801cef67880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 3c ================================================================== 02 00 0f 85 92 00 00 00 48 8b 14 dd 20 7a 1a 88 4c 89 f6 48 c7 c7 a0 6f 1a 88 e8 a6 4d ec fd <0f> 0b 83 05 19 4c 44 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f kasan: CONFIG_KASAN_INLINE enabled RSP: 0018:ffff8801dae07850 EFLAGS: 00010086 kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN RAX: 0000000000000068 RBX: 0000000000000005 RCX: ffffffff81854ed8 CPU: 1 PID: 0 Comm: Tainted: G B 4.17.0+ #98 RDX: 0000000000000100 RSI: ffffffff8161f371 RDI: 0000000000000001 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RBP: ffff8801dae07890 R08: ffff8801d2e38280 R09: ffffed003b5c3ec2 R10: ffffed003b5c3ec2 R11: ffff8801dae1f617 R12: 0000000000000001 RIP: 0010:__read_once_size include/linux/compiler.h:188 [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+0xea/0x5b0 kernel/sched/cputime.c:168 R13: ffffffff88f9a940 R14: ffffffff881a7380 R15: ffffffff81677180 Code: 63 04 00 debug_object_deactivate+0x2a7/0x400 lib/debugobjects.c:563 00 48 8b 83 b8 debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers+0x569/0xc50 kernel/time/timer.c:1666 06 00 00 48 ba 00 00 00 00 00 fc ff run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 df __do_softirq+0x2e0/0xaf5 kernel/softirq.c:284 48 8d b8 38 01 00 00 48 8d 88 20 01 00 00 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:404 48 89 exiting_irq arch/x86/include/asm/apic.h:527 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 fe 48 c1 ee 03 <0f> b6 14 16 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 48 89 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 fe Code: 83 c1 e6 e9 07 40 03 40 38 0f f2 b6 7f 08 f6 84 d2 48 0f b8 85 01 f6 01 03 01 01 00 01 RSP: 0018:ffff8801daf07980 EFLAGS: 00010006 01 01 01 RAX: 0000000000000000 RBX: ffff8801d0bce680 RCX: 0000000000000120 48 RDX: dffffc0000000000 RSI: 0000000000000027 RDI: 0000000000000138 0f RBP: ffff8801daf07a68 R08: ffff8801d0bce680 R09: 0000000000000000 af c6 R10: ffffed0043fff009 R11: ffff88021fff8057 R12: ffff8801daf07a40 f3 48 R13: ffff8801d0bce680 R14: 00000000000f4240 R15: 0000000000000002 ab FS: 00007f4c7cca4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 89 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 d1 f3 CR2: 0000000020000080 CR3: 00000001adf27000 CR4: 00000000001406e0 aa DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 4c 89 c8 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: c3 90 49 89 f9 40 88 f0 48 89 d1 account_system_time+0x7f/0xb0 kernel/sched/cputime.c:199 account_process_tick+0x76/0x240 kernel/sched/cputime.c:498 aa 4c 89 update_process_times+0x21/0x70 kernel/time/timer.c:1634 c8 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 c3 90 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 49 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1460 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8801d24d77f0 EFLAGS: 00010282 ORIG_RAX: ffffffffffffff13 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518 RAX: 0000000000000000 RBX: ffff8801cef677cc RCX: ffffffffffc16593 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050 RDX: ffffffffffffff9c RSI: 0000000000000000 RDI: ffff8801cf3511d5 RBP: ffff8801d24d7810 R08: ffffed0039deceed R09: ffff8801cef677cc R10: ffffed0039deceec R11: ffff8801cef67767 R12: ffffffffffffff9c R13: 0000000000000000 R14: ffff8801cef675c0 R15: ffff8801cef676e8 memset include/linux/string.h:330 [inline] vmac_final+0x161/0x26a0 crypto/vmac.c:611 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 Modules linked in: crypto_shash_final+0x104/0x260 crypto/shash.c:152 Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 6543079521a07167 ]--- shash_async_final+0x35/0x40 crypto/shash.c:252 RIP: 0010:__read_once_size include/linux/compiler.h:188 [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+0xea/0x5b0 kernel/sched/cputime.c:168 crypto_ahash_op+0xcf/0x180 crypto/ahash.c:362 Code: crypto_ahash_final+0x57/0x70 crypto/ahash.c:367 63 hash_sendmsg+0x750/0xac0 crypto/algif_hash.c:126 04 hash_sendmsg_nokey+0x61/0x80 crypto/algif_hash.c:346 00 00 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 48 __sys_sendto+0x3d7/0x670 net/socket.c:1833 8b 83 b8 06 00 00 48 ba 00 00 00 00 00 fc __do_sys_sendto net/socket.c:1845 [inline] __se_sys_sendto net/socket.c:1841 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1841 ff df do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 48 8d b8 38 01 00 entry_SYSCALL_64_after_hwframe+0x49/0xbe 00 RIP: 0033:0x446af9 48 8d Code: 88 20 e8 01 4c 00 e7 ff 00 ff 48 48 89 83 fe c4 18 48 c3 0f c1 1f ee 80 03 <0f> 00 b6 00 14 00 16 00 48 48 89 fe 89 f8 83 48 e6 89 07 f7 40 48 89 38 d6 f2 48 89 7f 08 ca 84 4d d2 89 c2 0f 85 4d f6 89 03 00 c8 4c 8b RSP: 0018:ffff8801daf07980 EFLAGS: 00010006 4c 24 08 RAX: 0000000000000000 RBX: ffff8801d0bce680 RCX: 0000000000000120 0f 05 RDX: dffffc0000000000 RSI: 0000000000000027 RDI: 0000000000000138 RBP: ffff8801daf07a68 R08: ffff8801d0bce680 R09: 0000000000000000 <48> R10: ffffed0043fff009 R11: ffff88021fff8057 R12: ffff8801daf07a40 3d R13: ffff8801d0bce680 R14: 00000000000f4240 R15: 0000000000000002 01 f0 FS: 00007f4c7cca4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 ff ff CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 0f 83 CR2: 0000000020000080 CR3: 00000001adf27000 CR4: 00000000001406e0 4b DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 56 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 00 00 c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4c7ccc4cd8 EFLAGS: 00000216 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000006dcc44 RCX: 0000000000446af9 RDX: 00000000000000f9 RSI: 0000000020000380 RDI: 0000000000000007 RBP: 00000000006dcc40 R08: 0000000020000480 R09: 0000000000000010 R10: 0000000000000804 R11: 0000000000000216 R12: 0000000000000000 R13: 00007fff3230487f R14: 00007f4c7ccc59c0 R15: 000000000000000b ====================================================== WARNING: possible circular locking dependency detected 4.17.0+ #98 Not tainted ------------------------------------------------------ syz-executor217/6468 is trying to acquire lock: (____ptrval____) ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: (____ptrval____) (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0xe1/0x400 lib/debugobjects.c:538 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+0x96/0xc0 kernel/locking/spinlock.c:152 __debug_object_init+0x11f/0x12c0 lib/debugobjects.c:381 debug_object_init+0x16/0x20 lib/debugobjects.c:429 debug_hrtimer_init kernel/time/hrtimer.c:410 [inline] debug_init kernel/time/hrtimer.c:458 [inline] hrtimer_init+0x8f/0x460 kernel/time/hrtimer.c:1308 init_dl_task_timer+0x1b/0x50 kernel/sched/deadline.c:1056 __sched_fork+0x2a8/0x570 kernel/sched/core.c:2184 init_idle+0x75/0x7a0 kernel/sched/core.c:5404 sched_init+0xbeb/0xd10 kernel/sched/core.c:6102 start_kernel+0x475/0x92d init/main.c:602 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242 -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1805 [inline] task_fork_fair+0x8a/0x660 kernel/sched/fair.c:9953 sched_fork+0x43e/0xb30 kernel/sched/core.c:2380 copy_process.part.38+0x1bf1/0x7180 kernel/fork.c:1765 copy_process kernel/fork.c:1608 [inline] _do_fork+0x291/0x12a0 kernel/fork.c:2091 kernel_thread+0x34/0x40 kernel/fork.c:2150 rest_init+0x22/0xe4 init/main.c:408 start_kernel+0x906/0x92d init/main.c:738 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 try_to_wake_up+0xca/0x1280 kernel/sched/core.c:1984 wake_up_process+0x10/0x20 kernel/sched/core.c:2147 __up.isra.1+0x1b8/0x290 kernel/locking/semaphore.c:262 up+0x12f/0x1b0 kernel/locking/semaphore.c:187 __up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:242 console_unlock+0x79a/0x10a0 kernel/printk/printk.c:2411 vprintk_emit+0x6b2/0xde0 kernel/printk/printk.c:1907 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0x9e/0xba kernel/printk/printk.c:1981 load_umh+0x51/0xbd net/bpfilter/bpfilter_kern.c:99 do_one_initcall+0x127/0x913 init/main.c:884 do_initcall_level init/main.c:952 [inline] do_initcalls init/main.c:960 [inline] do_basic_setup init/main.c:978 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1135 kernel_init+0x11/0x1b3 init/main.c:1061 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3924 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225 console_trylock+0x15/0xa0 kernel/printk/printk.c:2230 console_trylock_spinning kernel/printk/printk.c:1643 [inline] vprintk_emit+0x699/0xde0 kernel/printk/printk.c:1906 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0x9e/0xba kernel/printk/printk.c:1981 __warn_printk+0x83/0xd0 kernel/panic.c:590 debug_print_object+0x16a/0x210 lib/debugobjects.c:326 debug_object_deactivate+0x2a7/0x400 lib/debugobjects.c:563 debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers+0x569/0xc50 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:404 exiting_irq arch/x86/include/asm/apic.h:527 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 memset include/linux/string.h:330 [inline] vmac_final+0x161/0x26a0 crypto/vmac.c:611 crypto_shash_final+0x104/0x260 crypto/shash.c:152 shash_async_final+0x35/0x40 crypto/shash.c:252 crypto_ahash_op+0xcf/0x180 crypto/ahash.c:362 crypto_ahash_final+0x57/0x70 crypto/ahash.c:367 hash_sendmsg+0x750/0xac0 crypto/algif_hash.c:126 hash_sendmsg_nokey+0x61/0x80 crypto/algif_hash.c:346 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 __sys_sendto+0x3d7/0x670 net/socket.c:1833 __do_sys_sendto net/socket.c:1845 [inline] __se_sys_sendto net/socket.c:1841 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1841 do_syscall_64+0x1b1/0x800 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 --> &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 *** 3 locks held by syz-executor217/6468: #0: (____ptrval____) (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1474 [inline] #0: (____ptrval____) (sk_lock-AF_ALG){+.+.}, at: hash_sendmsg+0xd9/0xac0 crypto/algif_hash.c:81 #1: (____ptrval____) (&base->lock){-.-.}, at: __run_timers+0x16e/0xc50 kernel/time/timer.c:1658 #2: (____ptrval____) (&obj_hash[i].lock){-.-.}, at: debug_object_deactivate+0xe1/0x400 lib/debugobjects.c:538 stack backtrace: CPU: 0 PID: 6468 Comm: syz-executor217 Not tainted 4.17.0+ #98 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+0x1b9/0x294 lib/dump_stack.c:113 print_circular_bug.isra.36.cold.56+0x1bd/0x27d kernel/locking/lockdep.c:1227 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2421 [inline] __lock_acquire+0x343e/0x5140 kernel/locking/lockdep.c:3435 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3924 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225 console_trylock+0x15/0xa0 kernel/printk/printk.c:2230 console_trylock_spinning kernel/printk/printk.c:1643 [inline] vprintk_emit+0x699/0xde0 kernel/printk/printk.c:1906 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0x9e/0xba kernel/printk/printk.c:1981 __warn_printk+0x83/0xd0 kernel/panic.c:590 debug_print_object+0x16a/0x210 lib/debugobjects.c:326 debug_object_deactivate+0x2a7/0x400 lib/debugobjects.c:563 debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers+0x569/0xc50 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:404 exiting_irq arch/x86/include/asm/apic.h:527 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8801d24d77f0 EFLAGS: 00010282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8801cef677cc RCX: ffffffffffc16593 RDX: ffffffffffffff9c RSI: 0000000000000000 RDI: ffff8801cf3511d5 RBP: ffff8801d24d7810 R08: ffffed0039deceed R09: ffff8801cef677cc R10: ffffed0039deceec R11: ffff8801cef67767 R12: ffffffffffffff9c R13: 0000000000000000 R14: ffff8801cef675c0 R15: ffff8801cef676e8 memset include/linux/string.h:330 [inline] vmac_final+0x161/0x26a0 crypto/vmac.c:611 crypto_shash_final+0x104/0x260 crypto/shash.c:152 shash_async_final+0x35/0x40 crypto/shash.c:252 crypto_ahash_op+0xcf/0x180 crypto/ahash.c:362 crypto_ahash_final+0x57/0x70 crypto/ahash.c:367 hash_sendmsg+0x750/0xac0 crypto/algif_hash.c:126 hash_sendmsg_nokey+0x61/0x80 crypto/algif_hash.c:346 Lost 95 message(s)! Shutting down cpus with NMI Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..