================================ WARNING: inconsistent lock state 6.4.0-rc7-syzkaller-00204-g61dabacdad4e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.1/5143 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88807ffdc728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff88807ffdc728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: lru_gen_rotate_memcg+0x64/0xab0 mm/vmscan.c:4734 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] lru_gen_online_memcg+0x16b/0x5a0 mm/vmscan.c:4782 mem_cgroup_css_online+0x227/0x3b0 mm/memcontrol.c:5468 online_css+0xaf/0x2a0 kernel/cgroup/cgroup.c:5505 cgroup_init_subsys+0x46b/0x900 kernel/cgroup/cgroup.c:6036 cgroup_init+0xb83/0x1090 kernel/cgroup/cgroup.c:6120 start_kernel+0x398/0x490 init/main.c:1077 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb3/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0xf4/0xfb irq event stamp: 60508951 hardirqs last enabled at (60508950): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (60508950): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (60508951): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (60508600): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (60508600): [] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 softirqs last disabled at (60508813): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (60508813): [] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&pgdat->memcg_lru.lock); lock(&pgdat->memcg_lru.lock); *** DEADLOCK *** 5 locks held by syz-executor.1/5143: #0: ffffffff8c881790 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap+0xea/0x19d0 kernel/fork.c:660 #1: ffff888029c0c3e8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline] #1: ffff888029c0c3e8 (&mm->mmap_lock){++++}-{3:3}, at: dup_mmap+0x108/0x19d0 kernel/fork.c:661 #2: ffff88802d4f3468 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:101 [inline] #2: ffff88802d4f3468 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap+0x159/0x19d0 kernel/fork.c:670 #3: ffff88802373dd38 (&anon_vma->rwsem){++++}-{3:3}, at: lock_anon_vma_root mm/rmap.c:251 [inline] #3: ffff88802373dd38 (&anon_vma->rwsem){++++}-{3:3}, at: anon_vma_clone+0x140/0x5e0 mm/rmap.c:298 #4: ffffffff8c796020 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2104 [inline] #4: ffffffff8c796020 (rcu_callback){....}-{0:0}, at: rcu_core+0x791/0x1ad0 kernel/rcu/tree.c:2377 stack backtrace: CPU: 0 PID: 5143 Comm: syz-executor.1 Not tainted 6.4.0-rc7-syzkaller-00204-g61dabacdad4e #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3949 [inline] valid_state kernel/locking/lockdep.c:3991 [inline] mark_lock_irq kernel/locking/lockdep.c:4194 [inline] mark_lock.part.0+0x1110/0x1970 kernel/locking/lockdep.c:4656 mark_lock kernel/locking/lockdep.c:4620 [inline] mark_usage kernel/locking/lockdep.c:4545 [inline] __lock_acquire+0x1227/0x5f30 kernel/locking/lockdep.c:5042 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] lru_gen_rotate_memcg+0x64/0xab0 mm/vmscan.c:4734 lru_gen_soft_reclaim+0x62/0x70 mm/vmscan.c:4837 uncharge_batch+0x2be/0x560 mm/memcontrol.c:7145 __mem_cgroup_uncharge+0x11f/0x290 mm/memcontrol.c:7221 mem_cgroup_uncharge include/linux/memcontrol.h:698 [inline] __folio_put_small mm/swap.c:105 [inline] __folio_put+0xb6/0x140 mm/swap.c:129 folio_put include/linux/mm.h:1430 [inline] put_page include/linux/mm.h:1499 [inline] free_page_and_swap_cache+0x257/0x2c0 mm/swap_state.c:305 __tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline] __tlb_remove_table_free mm/mmu_gather.c:153 [inline] tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:208 rcu_do_batch kernel/rcu/tree.c:2115 [inline] rcu_core+0x806/0x1ad0 kernel/rcu/tree.c:2377 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__orc_find+0x5b/0xf0 arch/x86/kernel/unwind_orc.c:50 Code: ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 <48> d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 48 89 RSP: 0018:ffffc900034f7468 EFLAGS: 00000206 RAX: 0000000000000003 RBX: ffffffff8e905f18 RCX: ffffffff81c76409 RDX: 0000000000000003 RSI: ffffffff8f0bd7e8 RDI: ffffffff8e905f08 RBP: ffffffff8e905f08 R08: ffffffff8f0bd7e8 R09: ffffc900034f7960 R10: ffffc900034f7520 R11: 0000000000094001 R12: ffffffff8e905f14 R13: ffffffff8e905f08 R14: ffffffff8e905f08 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:192 [inline] unwind_next_frame+0x2ac/0x1e30 arch/x86/kernel/unwind_orc.c:466 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slab.c:3256 [inline] slab_alloc mm/slab.c:3265 [inline] __kmem_cache_alloc_lru mm/slab.c:3442 [inline] kmem_cache_alloc+0x1bd/0x3f0 mm/slab.c:3451 anon_vma_chain_alloc mm/rmap.c:142 [inline] anon_vma_clone+0xdb/0x5e0 mm/rmap.c:289 anon_vma_fork+0x7a/0x630 mm/rmap.c:352 dup_mmap+0xfc9/0x19d0 kernel/fork.c:730 dup_mm kernel/fork.c:1692 [inline] copy_mm kernel/fork.c:1741 [inline] copy_process+0x6663/0x75c0 kernel/fork.c:2507 kernel_clone+0xeb/0x890 kernel/fork.c:2915 __do_sys_clone+0xba/0x100 kernel/fork.c:3058 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f115d689fab Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00 RSP: 002b:00007fffab13a8a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f115d689fab RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 000055555747f400 R10: 000055555747f6d0 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffab13a980 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 49 89 fisttps -0x77(%rcx) 3: fe 48 89 decb -0x77(%rax) 6: fd std 7: eb 0c jmp 0x15 9: 48 8d 6b 04 lea 0x4(%rbx),%rbp d: 49 89 de mov %rbx,%r14 10: 49 39 ec cmp %rbp,%r12 13: 72 4d jb 0x62 15: 4c 89 e0 mov %r12,%rax 18: 48 29 e8 sub %rbp,%rax 1b: 48 89 c2 mov %rax,%rdx 1e: 48 c1 e8 3f shr $0x3f,%rax 22: 48 c1 fa 02 sar $0x2,%rdx 26: 48 01 d0 add %rdx,%rax * 29: 48 d1 f8 sar %rax <-- trapping instruction 2c: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 31: 48 89 d8 mov %rbx,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx 3d: 48 rex.W 3e: 89 .byte 0x89