RBP: 000000000072bea0 R08: 0000000020b3bfff R09: 0000000000000000 R10: 0000000020c35ffc R11: 0000000000000246 R12: 0000000000000013 R13: 00000000004bb8db R14: 00000000004c82a8 R15: 0000000000000003 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 1 PID: 24428 Comm: syz-executor7 Not tainted 4.17.0+ #106 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 Code: 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 48 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 01 RSP: 0018:ffff8801bd9a4da8 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000323e000 RDX: 0000000000000007 RSI: ffffffff817cba01 RDI: 0000000000000038 RBP: ffff8801bd9a4dc0 R08: ffffed003b5e46d7 R09: 0000000000000001 R10: ffff8801bd9a4ed0 R11: ffff8801daf236b3 R12: ffff8801b6e7a140 R13: ffff8801b2f7e4c0 R14: ffff8801b2f7e4fc R15: 0000000000000002 FS: 00007feb1e36a700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020b53000 CR3: 00000001b222c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xacb/0x12b0 kernel/sched/core.c:2057 default_wake_function+0x30/0x50 kernel/sched/core.c:3742 autoremove_wake_function+0x80/0x370 kernel/sched/wait.c:373 wake_page_function+0x15f/0x1c0 mm/filemap.c:1010 __wake_up_common+0x191/0x740 kernel/sched/wait.c:90 __wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165 wake_up_page_bit+0x2ab/0x5b0 mm/filemap.c:1030 unlock_page+0x223/0x2c0 mm/filemap.c:1207 __split_huge_page+0xfcc/0x17d0 mm/huge_memory.c:2461 split_huge_page_to_list+0x15ba/0x1c10 mm/huge_memory.c:2682 shrink_page_list+0x4a73/0x6080 mm/vmscan.c:1142 shrink_inactive_list+0x75a/0x1c90 mm/vmscan.c:1784 shrink_list mm/vmscan.c:2095 [inline] shrink_node_memcg+0x798/0x1940 mm/vmscan.c:2358 shrink_node+0x3be/0x1790 mm/vmscan.c:2573 shrink_zones mm/vmscan.c:2810 [inline] do_try_to_free_pages+0x3d1/0x1260 mm/vmscan.c:2872 try_to_free_mem_cgroup_pages+0x498/0xc80 mm/vmscan.c:3162 reclaim_high.constprop.68+0x137/0x1e0 mm/memcontrol.c:1862 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:1887 tracehook_notify_resume include/linux/tracehook.h:194 [inline] exit_to_usermode_loop+0x287/0x370 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007feb1e369c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: 00000000000005ae RBX: 00007feb1e36a6d4 RCX: 0000000000455b29 RDX: 000000002084effc RSI: 0000000020b53000 RDI: 0000000000000000 RBP: 000000000072bea0 R08: 0000000020b3bfff R09: 0000000000000000 R10: 0000000020c35ffc R11: 0000000000000246 R12: 0000000000000013 R13: 00000000004bb8db R14: 00000000004c82a8 R15: 0000000000000003 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ====================================================== WARNING: possible circular locking dependency detected 4.17.0+ #106 Not tainted ------------------------------------------------------ syz-executor7/24428 is trying to acquire lock: 000000000a96c59c ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 0000000024dff930 (&p->pi_lock){-.-.}, at: try_to_wake_up+0xd2/0x12b0 kernel/sched/core.c:1986 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #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+0xd2/0x12b0 kernel/sched/core.c:1986 wake_up_process+0x10/0x20 kernel/sched/core.c:2149 __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:242 console_unlock+0x7a2/0x10b0 kernel/printk/printk.c:2411 vprintk_emit+0x6c6/0xdf0 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+0xa7/0xcf 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+0x1e4/0x540 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+0x6ad/0xdf0 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+0xa7/0xcf kernel/printk/printk.c:1981 kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:251 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193 notify_die+0x1be/0x2e0 kernel/notifier.c:549 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:559 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 __delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xacb/0x12b0 kernel/sched/core.c:2057 default_wake_function+0x30/0x50 kernel/sched/core.c:3742 autoremove_wake_function+0x80/0x370 kernel/sched/wait.c:373 wake_page_function+0x15f/0x1c0 mm/filemap.c:1010 __wake_up_common+0x191/0x740 kernel/sched/wait.c:90 __wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165 wake_up_page_bit+0x2ab/0x5b0 mm/filemap.c:1030 unlock_page+0x223/0x2c0 mm/filemap.c:1207 __split_huge_page+0xfcc/0x17d0 mm/huge_memory.c:2461 split_huge_page_to_list+0x15ba/0x1c10 mm/huge_memory.c:2682 shrink_page_list+0x4a73/0x6080 mm/vmscan.c:1142 shrink_inactive_list+0x75a/0x1c90 mm/vmscan.c:1784 shrink_list mm/vmscan.c:2095 [inline] shrink_node_memcg+0x798/0x1940 mm/vmscan.c:2358 shrink_node+0x3be/0x1790 mm/vmscan.c:2573 shrink_zones mm/vmscan.c:2810 [inline] do_try_to_free_pages+0x3d1/0x1260 mm/vmscan.c:2872 try_to_free_mem_cgroup_pages+0x498/0xc80 mm/vmscan.c:3162 reclaim_high.constprop.68+0x137/0x1e0 mm/memcontrol.c:1862 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:1887 tracehook_notify_resume include/linux/tracehook.h:194 [inline] exit_to_usermode_loop+0x287/0x370 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->pi_lock); lock((console_sem).lock); lock(&p->pi_lock); lock((console_sem).lock); *** DEADLOCK *** 4 locks held by syz-executor7/24428: #0: 00000000e2f2e336 (&anon_vma->rwsem){++++}, at: anon_vma_lock_write include/linux/rmap.h:120 [inline] #0: 00000000e2f2e336 (&anon_vma->rwsem){++++}, at: split_huge_page_to_list+0xd59/0x1c10 mm/huge_memory.c:2621 #1: 00000000eabffb84 (&page_wait_table[i]){-.-.}, at: wake_up_page_bit+0x291/0x5b0 mm/filemap.c:1029 #2: 0000000024dff930 (&p->pi_lock){-.-.}, at: try_to_wake_up+0xd2/0x12b0 kernel/sched/core.c:1986 #3: 00000000b88f3579 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329 stack backtrace: CPU: 1 PID: 24428 Comm: syz-executor7 Not tainted 4.17.0+ #106 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+0x1c9/0x2b4 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+0x3449/0x5020 kernel/locking/lockdep.c:3435 lock_acquire+0x1e4/0x540 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+0x6ad/0xdf0 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+0xa7/0xcf kernel/printk/printk.c:1981 kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:251 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193 notify_die+0x1be/0x2e0 kernel/notifier.c:549 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:559 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 Code: 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 48 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 01 RSP: 0018:ffff8801bd9a4da8 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000323e000 RDX: 0000000000000007 RSI: ffffffff817cba01 RDI: 0000000000000038 RBP: ffff8801bd9a4dc0 R08: ffffed003b5e46d7 R09: 0000000000000001 R10: ffff8801bd9a4ed0 R11: ffff8801daf236b3 R12: ffff8801b6e7a140 R13: ffff8801b2f7e4c0 R14: ffff8801b2f7e4fc R15: 0000000000000002 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xacb/0x12b0 kernel/sched/core.c:2057 default_wake_function+0x30/0x50 kernel/sched/core.c:3742 autoremove_wake_function+0x80/0x370 kernel/sched/wait.c:373 wake_page_function+0x15f/0x1c0 mm/filemap.c:1010 __wake_up_common+0x191/0x740 kernel/sched/wait.c:90 __wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165 wake_up_page_bit+0x2ab/0x5b0 mm/filemap.c:1030 unlock_page+0x223/0x2c0 mm/filemap.c:1207 __split_huge_page+0xfcc/0x17d0 mm/huge_memory.c:2461 ? tr Lost 228 message(s)! ---[ end trace 2a5978140d74df86 ]--- RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:83 Code: 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 48 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 01 RSP: 0018:ffff8801bd9a4da8 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000323e000 RDX: 0000000000000007 RSI: ffffffff817cba01 RDI: 0000000000000038 RBP: ffff8801bd9a4dc0 R08: ffffed003b5e46d7 R09: 0000000000000001 R10: ffff8801bd9a4ed0 R11: ffff8801daf236b3 R12: ffff8801b6e7a140 R13: ffff8801b2f7e4c0 R14: ffff8801b2f7e4fc R15: 0000000000000002 FS: 00007feb1e36a700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020b53000 CR3: 00000001b222c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400