====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc3-syzkaller-00283-gf1a3944c860b #0 Not tainted ------------------------------------------------------ syz.0.83/6680 is trying to acquire lock: ffff888032a96c70 (&dat_lock_key){.+.+}-{4:4}, at: nilfs_get_block+0x1b1/0x8f0 fs/nilfs2/inode.c:83 but task is already holding lock: ffff88805847aa80 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] ffff88805847aa80 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_fault+0x546/0x1200 mm/filemap.c:3391 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (mapping.invalidate_lock#11){.+.+}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x546/0x1200 mm/filemap.c:3391 __do_fault+0x135/0x390 mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0x17f9/0x5380 mm/memory.c:6140 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1337 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x68/0x110 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #4 (vm_lock){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __vma_enter_locked+0x182/0x380 mm/memory.c:6473 __vma_start_write+0x1e/0x120 mm/memory.c:6497 vma_start_write include/linux/mm.h:829 [inline] mprotect_fixup+0x571/0x9b0 mm/mprotect.c:670 setup_arg_pages+0x53a/0xaa0 fs/exec.c:780 load_elf_binary+0xb7a/0x27b0 fs/binfmt_elf.c:1019 search_binary_handler fs/exec.c:1778 [inline] exec_binprm fs/exec.c:1810 [inline] bprm_execve+0x999/0x1440 fs/exec.c:1862 kernel_execve+0x8f0/0x9f0 fs/exec.c:2028 try_to_run_init_process+0x13/0x60 init/main.c:1385 kernel_init+0xad/0x1d0 init/main.c:1513 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #3 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 __might_fault+0xcc/0x130 mm/memory.c:7151 _copy_to_iter+0xf3/0x15a0 lib/iov_iter.c:184 copy_page_to_iter+0xa7/0x150 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:198 [inline] filemap_read+0x78d/0x11d0 mm/filemap.c:2753 blkdev_read_iter+0x30a/0x440 block/fops.c:809 new_sync_read fs/read_write.c:489 [inline] vfs_read+0x4cd/0x980 fs/read_write.c:570 ksys_read+0x145/0x250 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&sb->s_type->i_mutex_key#7){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] set_blocksize+0x23b/0x500 block/bdev.c:203 sb_set_blocksize block/bdev.c:224 [inline] sb_min_blocksize+0x119/0x210 block/bdev.c:239 init_nilfs+0x43/0x690 fs/nilfs2/the_nilfs.c:710 nilfs_fill_super+0x8f/0x650 fs/nilfs2/super.c:1060 nilfs_get_tree+0x4f4/0x870 fs/nilfs2/super.c:1228 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3884 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&nilfs->ns_sem){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 nilfs_set_error fs/nilfs2/super.c:92 [inline] __nilfs_error+0x1ca/0x4b0 fs/nilfs2/super.c:141 nilfs_bmap_convert_error fs/nilfs2/bmap.c:35 [inline] nilfs_bmap_lookup_contig+0x13e/0x160 fs/nilfs2/bmap.c:100 nilfs_get_block+0x1fb/0x8f0 fs/nilfs2/inode.c:84 __block_write_begin_int+0x6b2/0x1900 fs/buffer.c:2151 nilfs_prepare_chunk fs/nilfs2/dir.c:86 [inline] nilfs_add_link+0x855/0xd50 fs/nilfs2/dir.c:492 nilfs_add_nondir fs/nilfs2/namei.c:37 [inline] nilfs_mknod+0x16a/0x280 fs/nilfs2/namei.c:131 vfs_mknod+0x37c/0x3c0 fs/namei.c:4228 do_mknodat+0x385/0x4d0 fs/namei.c:-1 __do_sys_mknod fs/namei.c:4311 [inline] __se_sys_mknod fs/namei.c:4309 [inline] __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4309 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&dat_lock_key){.+.+}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 nilfs_get_block+0x1b1/0x8f0 fs/nilfs2/inode.c:83 block_read_full_folio+0x29c/0x830 fs/buffer.c:2427 do_mpage_readpage+0x175d/0x19a0 fs/mpage.c:314 mpage_read_folio+0x14a/0x220 fs/mpage.c:389 filemap_read_folio+0x114/0x380 mm/filemap.c:2401 filemap_fault+0xb1a/0x1200 mm/filemap.c:3495 __do_fault+0x135/0x390 mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0x17f9/0x5380 mm/memory.c:6140 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1337 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x68/0x110 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 other info that might help us debug this: Chain exists of: &dat_lock_key --> vm_lock --> mapping.invalidate_lock#11 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#11); lock(vm_lock); lock(mapping.invalidate_lock#11); rlock(&dat_lock_key); *** DEADLOCK *** 1 lock held by syz.0.83/6680: #0: ffff88805847aa80 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] #0: ffff88805847aa80 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_fault+0x546/0x1200 mm/filemap.c:3391 stack backtrace: CPU: 1 UID: 0 PID: 6680 Comm: syz.0.83 Not tainted 6.15.0-rc3-syzkaller-00283-gf1a3944c860b #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 nilfs_get_block+0x1b1/0x8f0 fs/nilfs2/inode.c:83 block_read_full_folio+0x29c/0x830 fs/buffer.c:2427 do_mpage_readpage+0x175d/0x19a0 fs/mpage.c:314 mpage_read_folio+0x14a/0x220 fs/mpage.c:389 filemap_read_folio+0x114/0x380 mm/filemap.c:2401 filemap_fault+0xb1a/0x1200 mm/filemap.c:3495 __do_fault+0x135/0x390 mm/memory.c:5098 do_shared_fault mm/memory.c:5582 [inline] do_fault mm/memory.c:5656 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault+0x17f9/0x5380 mm/memory.c:6140 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1337 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x68/0x110 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f0c09156769 Code: fe 6f 64 16 e0 c5 fe 6f 6c 16 c0 c5 fe 6f 74 16 a0 c5 fe 6f 7c 16 80 c5 fe 7f 07 c5 fe 7f 4f 20 c5 fe 7f 57 40 c5 fe 7f 5f 60 fe 7f 64 17 e0 c5 fe 7f 6c 17 c0 c5 fe 7f 74 17 a0 c5 fe 7f 7c RSP: 002b:00007fff1f59b2a8 EFLAGS: 00010202 RAX: 0000200000000f80 RBX: 0000000000000004 RCX: 80000000000000fa RDX: 00000000000000fa RSI: 00007f0c08c01c70 RDI: 0000200000000f80 RBP: 00007f0c093b7ba0 R08: 00007f0c09000000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000009 R12: 00007f0c093b5fac R13: 00007fff1f59b3a0 R14: fffffffffffffffe R15: 00007fff1f59b3c0 NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15) NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=15)