================================ WARNING: inconsistent lock state 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-fuzzer/5142 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88807ffdb728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff88807ffdb728 (&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: 1364781 hardirqs last enabled at (1364780): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (1364780): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (1364781): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (1363626): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (1363626): [] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 softirqs last disabled at (1364697): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (1364697): [] __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 *** 4 locks held by syz-fuzzer/5142: #0: ffff88801246ae68 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:161 [inline] #0: ffff88801246ae68 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x448/0x1210 arch/x86/mm/fault.c:1381 #1: ffff88801a74af68 (mutex){+.+.}-{3:3}, at: zswap_frontswap_load+0x4c5/0x1110 mm/zswap.c:1393 #2: ffff88802c938d38 (scomp_scratch.lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #2: ffff88802c938d38 (scomp_scratch.lock){+.+.}-{2:2}, at: scomp_acomp_comp_decomp+0x192/0x7b0 crypto/scompress.c:132 #3: ffffffff8c798fe0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2104 [inline] #3: ffffffff8c798fe0 (rcu_callback){....}-{0:0}, at: rcu_core+0x791/0x1ad0 kernel/rcu/tree.c:2377 stack backtrace: CPU: 3 PID: 5142 Comm: syz-fuzzer Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #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:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 Code: 16 14 8f 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be a8 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 8b 05 5d 70 7f 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0000:ffffc90003a8f4e0 EFLAGS: 00000287 RAX: 0000000000000000 RBX: ffffc90003da7165 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffc90003dc8901 RBP: ffffc90003dc8909 R08: 0000000000000006 R09: 0000000000000014 R10: 0000000000000707 R11: 0000000000094001 R12: ffffc90003dc88fe R13: dffffc0000000000 R14: aaa2aaaaac890410 R15: ffffc90003dc88d6 lzo1x_decompress_safe+0x6de/0x1970 lib/lzo/lzo1x_decompress_safe.c:226 __lzo_decompress crypto/lzo.c:88 [inline] lzo_sdecompress+0xab/0x150 crypto/lzo.c:107 crypto_scomp_decompress include/crypto/internal/scompress.h:98 [inline] scomp_acomp_comp_decomp+0x2f7/0x7b0 crypto/scompress.c:139 crypto_acomp_decompress include/crypto/acompress.h:328 [inline] zswap_frontswap_load+0x721/0x1110 mm/zswap.c:1398 __frontswap_load+0x202/0x560 mm/frontswap.c:218 frontswap_load include/linux/frontswap.h:74 [inline] swap_readpage+0x697/0x20b0 mm/page_io.c:518 read_swap_cache_async mm/swap_state.c:528 [inline] swap_cluster_readahead+0x855/0x9c0 mm/swap_state.c:663 swapin_readahead+0xd1/0xdf0 mm/swap_state.c:848 do_swap_page+0x554/0x3570 mm/memory.c:3796 handle_pte_fault mm/memory.c:4950 [inline] __handle_mm_fault+0x15de/0x41c0 mm/memory.c:5089 handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243 do_user_addr_fault+0x51a/0x1210 arch/x86/mm/fault.c:1440 handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x4156a8 Code: 48 83 ff 40 4d 19 c0 49 89 c1 48 c1 e8 09 49 89 c2 25 ff ff 01 00 48 89 f9 41 bc 01 00 00 00 49 d3 e4 4d 21 c4 4d 8d 44 24 ff <4c> 23 04 c2 49 09 d8 4c 89 04 c2 48 c1 e8 03 48 3d 00 40 00 00 73 RSP: 002b:000000c0000a3598 EFLAGS: 00010206 RAX: 000000000001c39e RBX: f800000000000000 RCX: 000000000000003a RDX: 00007f9f819fe000 RSI: 000000000000000c RDI: 000000000000003a RBP: 000000c0000a35a8 R08: 03ffffffffffffff R09: 000000c007873c00 R10: 000000006003c39e R11: 0000000000000807 R12: 0400000000000000 R13: 0000000000000036 R14: 000000c00048b040 R15: 000000c00056e800 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 8f 02 popq (%rdx) 2: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 8: f3 0f 1e fa endbr64 c: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi 13: e8 b0 ff ff ff callq 0xffffffc8 18: 31 c0 xor %eax,%eax 1a: c3 retq 1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 22: 00 00 00 00 26: 66 90 xchg %ax,%ax * 28: f3 0f 1e fa endbr64 <-- trapping instruction 2c: 65 8b 05 5d 70 7f 7e mov %gs:0x7e7f705d(%rip),%eax # 0x7e7f7090 33: 89 c1 mov %eax,%ecx 35: 48 8b 34 24 mov (%rsp),%rsi 39: 81 .byte 0x81 3a: e1 00 loope 0x3c 3c: 01 00 add %eax,(%rax)