====================================================== WARNING: possible circular locking dependency detected 6.5.0-rc1-next-20230714-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/4349 is trying to acquire lock: ffff88802d5a2458 (&info->lock){....}-{2:2}, at: shmem_uncharge+0x28/0x2b0 mm/shmem.c:450 but task is already holding lock: ffff8880404e6068 (&lruvec->lru_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff8880404e6068 (&lruvec->lru_lock){..-.}-{2:2}, at: folio_lruvec_lock+0x1ba/0x3b0 mm/memcontrol.c:1323 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&lruvec->lru_lock){..-.}-{2:2}: __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:351 [inline] folio_lruvec_lock+0x1ba/0x3b0 mm/memcontrol.c:1323 __split_huge_page mm/huge_memory.c:2538 [inline] split_huge_page_to_list+0x103b/0x49e0 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] shrink_folio_list+0x24c3/0x3dc0 mm/vmscan.c:1927 reclaim_folio_list+0xe4/0x3a0 mm/vmscan.c:2801 reclaim_pages+0x483/0x6a0 mm/vmscan.c:2837 madvise_cold_or_pageout_pte_range+0x1174/0x1f20 mm/madvise.c:430 walk_pmd_range mm/pagewalk.c:140 [inline] walk_pud_range mm/pagewalk.c:218 [inline] walk_p4d_range mm/pagewalk.c:253 [inline] walk_pgd_range+0xa36/0x1770 mm/pagewalk.c:290 __walk_page_range+0x62e/0x770 mm/pagewalk.c:392 walk_page_range+0x3b2/0x470 mm/pagewalk.c:490 madvise_pageout_page_range mm/madvise.c:591 [inline] madvise_pageout+0x317/0x570 mm/madvise.c:618 madvise_vma_behavior+0x1ce/0x1e60 mm/madvise.c:1039 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1268 do_madvise+0x333/0x660 mm/madvise.c:1448 __do_sys_madvise mm/madvise.c:1461 [inline] __se_sys_madvise mm/madvise.c:1459 [inline] __x64_sys_madvise+0xaa/0x110 mm/madvise.c:1459 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&xa->xa_lock#8){..-.}-{2:2}: __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] filemap_remove_folio+0xbf/0x250 mm/filemap.c:259 truncate_inode_folio+0x49/0x70 mm/truncate.c:195 shmem_undo_range+0x363/0x1190 mm/shmem.c:1004 shmem_truncate_range mm/shmem.c:1120 [inline] shmem_evict_inode+0x334/0xb10 mm/shmem.c:1250 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1791 [inline] iput.part.0+0x55e/0x7a0 fs/inode.c:1817 iput+0x5c/0x80 fs/inode.c:1807 dentry_unlink_inode+0x292/0x430 fs/dcache.c:401 __dentry_kill+0x3b8/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x703/0xfd0 fs/dcache.c:913 do_renameat2+0xc4c/0xdc0 fs/namei.c:5011 __do_sys_rename fs/namei.c:5055 [inline] __se_sys_rename fs/namei.c:5053 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:5053 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&sb->s_type->i_lock_key){+.+.}-{2:2}: __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:351 [inline] inode_sub_bytes+0x28/0x100 fs/stat.c:816 __dquot_free_space+0x8f7/0xaf0 fs/quota/dquot.c:1881 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_block_nodirty include/linux/quotaops.h:390 [inline] shmem_inode_unacct_blocks mm/shmem.c:243 [inline] shmem_recalc_inode+0x196/0x350 mm/shmem.c:420 shmem_undo_range+0x558/0x1190 mm/shmem.c:1114 shmem_truncate_range mm/shmem.c:1120 [inline] shmem_evict_inode+0x334/0xb10 mm/shmem.c:1250 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1791 [inline] iput.part.0+0x55e/0x7a0 fs/inode.c:1817 iput+0x5c/0x80 fs/inode.c:1807 dentry_unlink_inode+0x292/0x430 fs/dcache.c:401 __dentry_kill+0x3b8/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x703/0xfd0 fs/dcache.c:913 do_renameat2+0xc4c/0xdc0 fs/namei.c:5011 __do_sys_rename fs/namei.c:5055 [inline] __se_sys_rename fs/namei.c:5053 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:5053 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&info->lock){....}-{2:2}: check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 shmem_uncharge+0x28/0x2b0 mm/shmem.c:450 __split_huge_page mm/huge_memory.c:2549 [inline] split_huge_page_to_list+0x3832/0x49e0 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] shrink_folio_list+0x24c3/0x3dc0 mm/vmscan.c:1927 reclaim_folio_list+0xe4/0x3a0 mm/vmscan.c:2801 reclaim_pages+0x483/0x6a0 mm/vmscan.c:2837 madvise_cold_or_pageout_pte_range+0x1174/0x1f20 mm/madvise.c:430 walk_pmd_range mm/pagewalk.c:140 [inline] walk_pud_range mm/pagewalk.c:218 [inline] walk_p4d_range mm/pagewalk.c:253 [inline] walk_pgd_range+0xa36/0x1770 mm/pagewalk.c:290 __walk_page_range+0x62e/0x770 mm/pagewalk.c:392 walk_page_range+0x3b2/0x470 mm/pagewalk.c:490 madvise_pageout_page_range mm/madvise.c:591 [inline] madvise_pageout+0x317/0x570 mm/madvise.c:618 madvise_vma_behavior+0x1ce/0x1e60 mm/madvise.c:1039 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1268 do_madvise+0x333/0x660 mm/madvise.c:1448 __do_sys_madvise mm/madvise.c:1461 [inline] __se_sys_madvise mm/madvise.c:1459 [inline] __x64_sys_madvise+0xaa/0x110 mm/madvise.c:1459 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &info->lock --> &xa->xa_lock#8 --> &lruvec->lru_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&lruvec->lru_lock); lock(&xa->xa_lock#8); lock(&lruvec->lru_lock); lock(&info->lock); *** DEADLOCK *** 4 locks held by syz-executor.0/4349: #0: ffff88807a4b6a20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:132 [inline] #0: ffff88807a4b6a20 (&mm->mmap_lock){++++}-{3:3}, at: do_madvise+0x4ae/0x660 mm/madvise.c:1441 #1: ffff88802d5a29f0 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:501 [inline] #1: ffff88802d5a29f0 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: split_huge_page_to_list+0x7d5/0x49e0 mm/huge_memory.c:2712 #2: ffff88802d5a2860 (&xa->xa_lock#8){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff88802d5a2860 (&xa->xa_lock#8){..-.}-{2:2}, at: split_huge_page_to_list+0x980/0x49e0 mm/huge_memory.c:2744 #3: ffff8880404e6068 (&lruvec->lru_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #3: ffff8880404e6068 (&lruvec->lru_lock){..-.}-{2:2}, at: folio_lruvec_lock+0x1ba/0x3b0 mm/memcontrol.c:1323 stack backtrace: CPU: 1 PID: 4349 Comm: syz-executor.0 Not tainted 6.5.0-rc1-next-20230714-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 kernel/locking/lockdep.c:2195 check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 shmem_uncharge+0x28/0x2b0 mm/shmem.c:450 __split_huge_page mm/huge_memory.c:2549 [inline] split_huge_page_to_list+0x3832/0x49e0 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] shrink_folio_list+0x24c3/0x3dc0 mm/vmscan.c:1927 reclaim_folio_list+0xe4/0x3a0 mm/vmscan.c:2801 reclaim_pages+0x483/0x6a0 mm/vmscan.c:2837 madvise_cold_or_pageout_pte_range+0x1174/0x1f20 mm/madvise.c:430 walk_pmd_range mm/pagewalk.c:140 [inline] walk_pud_range mm/pagewalk.c:218 [inline] walk_p4d_range mm/pagewalk.c:253 [inline] walk_pgd_range+0xa36/0x1770 mm/pagewalk.c:290 __walk_page_range+0x62e/0x770 mm/pagewalk.c:392 walk_page_range+0x3b2/0x470 mm/pagewalk.c:490 madvise_pageout_page_range mm/madvise.c:591 [inline] madvise_pageout+0x317/0x570 mm/madvise.c:618 madvise_vma_behavior+0x1ce/0x1e60 mm/madvise.c:1039 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1268 do_madvise+0x333/0x660 mm/madvise.c:1448 __do_sys_madvise mm/madvise.c:1461 [inline] __se_sys_madvise mm/madvise.c:1459 [inline] __x64_sys_madvise+0xaa/0x110 mm/madvise.c:1459 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe66ee7cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe66fafc0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fe66ef9bf80 RCX: 00007fe66ee7cb29 RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000000020000000 RBP: 00007fe66eec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe66ef9bf80 R15: 00007fffa6ef4258