====================================================== WARNING: possible circular locking dependency detected 6.5.0-rc1-syzkaller #0 Not tainted ------------------------------------------------------ /2653 is trying to acquire lock: ffff888104739f80 (&info->lock){....}-{2:2}, at: shmem_uncharge+0x1f/0xc0 mm/shmem.c:449 but task is already holding lock: ffff888101fe9068 (&lruvec->lru_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff888101fe9068 (&lruvec->lru_lock){....}-{2:2}, at: folio_lruvec_lock+0xa2/0x1c0 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+0xa2/0x1c0 mm/memcontrol.c:1323 __split_huge_page mm/huge_memory.c:2538 [inline] split_huge_page_to_list+0x5c3/0x1820 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] split_folio include/linux/huge_mm.h:405 [inline] truncate_inode_partial_folio+0x146/0x1c0 mm/truncate.c:242 shmem_undo_range+0x326/0x6a0 mm/shmem.c:1025 shmem_truncate_range mm/shmem.c:1119 [inline] shmem_setattr+0x35c/0x420 mm/shmem.c:1204 notify_change+0x1ee/0x470 fs/attr.c:483 do_truncate+0x93/0xe0 fs/open.c:66 do_sys_ftruncate+0x278/0x2d0 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&xa->xa_lock#6){..-.}-{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+0x37/0xa0 mm/filemap.c:259 truncate_inode_folio+0x1e/0x30 mm/truncate.c:195 shmem_undo_range+0x168/0x6a0 mm/shmem.c:1003 shmem_truncate_range mm/shmem.c:1119 [inline] shmem_evict_inode+0xd8/0x280 mm/shmem.c:1249 evict+0xc8/0x1c0 fs/inode.c:665 __dentry_kill+0xda/0x1a0 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x2c2/0x500 fs/dcache.c:913 do_renameat2+0x371/0x600 fs/namei.c:5011 __do_sys_rename fs/namei.c:5055 [inline] __se_sys_rename fs/namei.c:5053 [inline] __x64_sys_rename+0x3e/0x50 fs/namei.c:5053 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 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+0x1d/0x70 fs/stat.c:816 __dquot_free_space+0x2e0/0x2f0 fs/quota/dquot.c:1875 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:242 [inline] shmem_recalc_inode+0x59/0xa0 mm/shmem.c:419 shmem_undo_range+0x246/0x6a0 mm/shmem.c:1113 shmem_truncate_range mm/shmem.c:1119 [inline] shmem_evict_inode+0xd8/0x280 mm/shmem.c:1249 evict+0xc8/0x1c0 fs/inode.c:665 __dentry_kill+0xda/0x1a0 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x2c2/0x500 fs/dcache.c:913 do_renameat2+0x371/0x600 fs/namei.c:5011 __do_sys_rename fs/namei.c:5055 [inline] __se_sys_rename fs/namei.c:5053 [inline] __x64_sys_rename+0x3e/0x50 fs/namei.c:5053 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 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+0x12e6/0x1d00 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0xcd/0x2d0 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+0x1f/0xc0 mm/shmem.c:449 __split_huge_page mm/huge_memory.c:2549 [inline] split_huge_page_to_list+0x1291/0x1820 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] split_folio include/linux/huge_mm.h:405 [inline] truncate_inode_partial_folio+0x146/0x1c0 mm/truncate.c:242 shmem_undo_range+0x326/0x6a0 mm/shmem.c:1025 shmem_truncate_range mm/shmem.c:1119 [inline] shmem_setattr+0x35c/0x420 mm/shmem.c:1204 notify_change+0x1ee/0x470 fs/attr.c:483 do_truncate+0x93/0xe0 fs/open.c:66 do_sys_ftruncate+0x278/0x2d0 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 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#6 --> &lruvec->lru_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&lruvec->lru_lock); lock(&xa->xa_lock#6); lock(&lruvec->lru_lock); lock(&info->lock); *** DEADLOCK *** 5 locks held by /2653: #0: ffff88810279d3f8 (sb_writers#5){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline] #0: ffff88810279d3f8 (sb_writers#5){.+.+}-{0:0}, at: do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 #1: ffff88810473a1f8 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88810473a1f8 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: do_truncate+0x83/0xe0 fs/open.c:64 #2: ffff88810473a498 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:501 [inline] #2: ffff88810473a498 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: split_huge_page_to_list+0x2ed/0x1820 mm/huge_memory.c:2712 #3: ffff88810473a308 (&xa->xa_lock#6){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #3: ffff88810473a308 (&xa->xa_lock#6){..-.}-{2:2}, at: split_huge_page_to_list+0x37a/0x1820 mm/huge_memory.c:2744 #4: ffff888101fe9068 (&lruvec->lru_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #4: ffff888101fe9068 (&lruvec->lru_lock){....}-{2:2}, at: folio_lruvec_lock+0xa2/0x1c0 mm/memcontrol.c:1323 stack backtrace: CPU: 0 PID: 2653 Comm: Not tainted 6.5.0-rc1-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+0x5c/0xb0 lib/dump_stack.c:106 check_noncircular+0x116/0x130 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+0x12e6/0x1d00 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0xcd/0x2d0 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+0x1f/0xc0 mm/shmem.c:449 __split_huge_page mm/huge_memory.c:2549 [inline] split_huge_page_to_list+0x1291/0x1820 mm/huge_memory.c:2772 split_folio_to_list include/linux/huge_mm.h:400 [inline] split_folio include/linux/huge_mm.h:405 [inline] truncate_inode_partial_folio+0x146/0x1c0 mm/truncate.c:242 shmem_undo_range+0x326/0x6a0 mm/shmem.c:1025 shmem_truncate_range mm/shmem.c:1119 [inline] shmem_setattr+0x35c/0x420 mm/shmem.c:1204 notify_change+0x1ee/0x470 fs/attr.c:483 do_truncate+0x93/0xe0 fs/open.c:66 do_sys_ftruncate+0x278/0x2d0 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9c3527cb29 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:00007f9c35fca0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007f9c3539bf80 RCX: 00007f9c3527cb29 RDX: 0000000000000000 RSI: 0000000000008979 RDI: 0000000000000003 RBP: 00007f9c352c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f9c3539bf80 R15: 00007ffcf6980c98