================================ WARNING: inconsistent lock state 6.4.0-rc6-syzkaller-00279-g8c1f0c38b310 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/10266 [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:4749 {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:4797 mem_cgroup_css_online+0x227/0x3b0 mm/memcontrol.c:5468 online_css+0xaf/0x2a0 kernel/cgroup/cgroup.c:5491 cgroup_init_subsys+0x46b/0x900 kernel/cgroup/cgroup.c:6022 cgroup_init+0xb83/0x1090 kernel/cgroup/cgroup.c:6106 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: 525 hardirqs last enabled at (524): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (524): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (525): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (294): [] trace_x86_fpu_after_save arch/x86/include/asm/trace/fpu.h:42 [inline] softirqs last enabled at (294): [] fpu_sync_fpstate+0x160/0x3d0 arch/x86/kernel/fpu/core.c:468 softirqs last disabled at (431): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (431): [] __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.3/10266: #0: ffff888024184460 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x1c02/0x25b0 kernel/signal.c:2862 #1: ffff88805d111480 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88805d111480 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x460 fs/ext4/file.c:283 #2: ffff88802401c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14e0 fs/jbd2/transaction.c:461 #3: ffff88805d1117e0 (&ei->i_raw_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #3: ffff88805d1117e0 (&ei->i_raw_lock){+.+.}-{2:2}, at: ext4_do_update_inode fs/ext4/inode.c:5066 [inline] #3: ffff88805d1117e0 (&ei->i_raw_lock){+.+.}-{2:2}, at: ext4_mark_iloc_dirty+0x1a7/0x1b70 fs/ext4/inode.c:5715 #4: ffffffff8c795fe0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2104 [inline] #4: ffffffff8c795fe0 (rcu_callback){....}-{0:0}, at: rcu_core+0x791/0x1ad0 kernel/rcu/tree.c:2377 stack backtrace: CPU: 2 PID: 10266 Comm: syz-executor.3 Not tainted 6.4.0-rc6-syzkaller-00279-g8c1f0c38b310 #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:4749 lru_gen_soft_reclaim+0x62/0x70 mm/vmscan.c:4852 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:crc32c_pcl_intel_update+0x77/0x320 arch/x86/crypto/crc32c-intel_glue.c:165 Code: 00 00 fc ff df 48 89 ca 48 89 4c 24 08 48 c1 ea 03 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 80 02 00 00 <48> 8b 04 24 49 c1 ec 03 83 e5 07 31 ff 44 89 e6 89 6c 24 14 8b 58 RSP: 0000:ffffc90022e06c50 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffffffff8c633728 RCX: ffffc90022e06d48 RDX: 0000000000000000 RSI: ffffffff81481c9d RDI: 0000000000000005 RBP: 0000000000000002 R08: 0000000000000005 R09: 00000000000001ff R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000002 R13: ffffc90022e06d30 R14: 0000000000000000 R15: ffffc90022e06d40 crypto_shash_update+0xc8/0x120 crypto/shash.c:134 ext4_chksum fs/ext4/ext4.h:2399 [inline] ext4_inode_csum+0x247/0x8d0 fs/ext4/inode.c:62 ext4_inode_csum_set fs/ext4/inode.c:115 [inline] ext4_inode_csum_set+0x16d/0x360 fs/ext4/inode.c:105 ext4_fill_raw_inode+0x118a/0x1e90 fs/ext4/inode.c:4329 ext4_do_update_inode fs/ext4/inode.c:5083 [inline] ext4_mark_iloc_dirty+0x52c/0x1b70 fs/ext4/inode.c:5715 __ext4_mark_inode_dirty+0x21f/0x800 fs/ext4/inode.c:5919 ext4_dirty_inode+0xdd/0x130 fs/ext4/inode.c:5948 __mark_inode_dirty+0x1e0/0xd60 fs/fs-writeback.c:2424 mark_inode_dirty include/linux/fs.h:2144 [inline] generic_write_end+0x354/0x440 fs/buffer.c:2257 ext4_da_write_end+0x19b/0xad0 fs/ext4/inode.c:3012 generic_perform_write+0x316/0x570 mm/filemap.c:3940 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:289 ext4_file_write_iter+0xbe0/0x1740 fs/ext4/file.c:710 __kernel_write_iter+0x262/0x7a0 fs/read_write.c:517 __kernel_write+0xcb/0x110 fs/read_write.c:537 __dump_emit fs/coredump.c:813 [inline] dump_emit+0x21d/0x340 fs/coredump.c:850 elf_core_dump+0x2289/0x36e0 fs/binfmt_elf.c:2121 do_coredump+0x2f2b/0x4020 fs/coredump.c:764 get_signal+0x1c02/0x25b0 kernel/signal.c:2862 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 asm_exc_stack_segment+0x26/0x30 arch/x86/include/asm/idtentry.h:563 RIP: 0033:0x7f81ce88c391 Code: c4 28 c3 e8 f1 19 00 00 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 73 01 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0002001000000000 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f81ce9abf80 RCX: 00007f81ce88c389 RDX: 0000000000000000 RSI: 0002001000000000 RDI: 0000000020000000 RBP: 00007f81ce8d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffebd7777ef R14: 00007f81cf568300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: ca 48 89 lret $0x8948 6: 4c 24 08 rex.WR and $0x8,%al 9: 48 c1 ea 03 shr $0x3,%rdx d: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 11: 48 89 c8 mov %rcx,%rax 14: 83 e0 07 and $0x7,%eax 17: 83 c0 03 add $0x3,%eax 1a: 38 d0 cmp %dl,%al 1c: 7c 08 jl 0x26 1e: 84 d2 test %dl,%dl 20: 0f 85 80 02 00 00 jne 0x2a6 * 26: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction 2a: 49 c1 ec 03 shr $0x3,%r12 2e: 83 e5 07 and $0x7,%ebp 31: 31 ff xor %edi,%edi 33: 44 89 e6 mov %r12d,%esi 36: 89 6c 24 14 mov %ebp,0x14(%rsp) 3a: 8b .byte 0x8b 3b: 58 pop %rax