NILFS (loop5): recovery complete ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 Not tainted ------------------------------------------------------ syz.5.253/8183 is trying to acquire lock: ffff0000f1fc4400 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] ffff0000f1fc4400 (mapping.invalidate_lock#9){.+.+}-{4:4}, at: filemap_fault+0x564/0x1278 mm/filemap.c:3391 but task is already holding lock: ffff0000c25f4e50 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:184 [inline] ffff0000c25f4e50 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x154/0x330 mm/gup.c:2011 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xc4/0x124 mm/memory.c:7151 _copy_to_iter+0xe0/0x1394 lib/iov_iter.c:184 copy_page_to_iter+0x24c/0x348 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:198 [inline] filemap_read+0x668/0xf4c mm/filemap.c:2753 blkdev_read_iter+0x2b0/0x3dc block/fops.c:809 new_sync_read fs/read_write.c:489 [inline] vfs_read+0x5fc/0x898 fs/read_write.c:570 ksys_read+0x120/0x210 fs/read_write.c:713 __do_sys_read fs/read_write.c:722 [inline] __se_sys_read fs/read_write.c:720 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:720 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #3 (&sb->s_type->i_mutex_key#8){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] set_blocksize+0x1c4/0x440 block/bdev.c:203 sb_set_blocksize block/bdev.c:224 [inline] sb_min_blocksize+0x118/0x1fc block/bdev.c:239 init_nilfs+0x4c/0x584 fs/nilfs2/the_nilfs.c:710 nilfs_fill_super+0x94/0x568 fs/nilfs2/super.c:1060 nilfs_get_tree+0x378/0x664 fs/nilfs2/super.c:1228 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x228/0x814 fs/namespace.c:3884 path_mount+0x5b4/0xde0 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #2 (&nilfs->ns_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 nilfs_set_error fs/nilfs2/super.c:92 [inline] __nilfs_error+0x164/0x3bc fs/nilfs2/super.c:141 nilfs_bmap_convert_error fs/nilfs2/bmap.c:35 [inline] nilfs_bmap_lookup_contig+0x114/0x13c fs/nilfs2/bmap.c:100 nilfs_get_block+0x1a0/0x7a8 fs/nilfs2/inode.c:84 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2151 __block_write_begin+0x40/0x54 fs/buffer.c:2200 nilfs_prepare_chunk fs/nilfs2/dir.c:86 [inline] nilfs_add_link+0x768/0xc00 fs/nilfs2/dir.c:492 nilfs_mkdir+0x1c4/0x2e4 fs/nilfs2/namei.c:249 vfs_mkdir+0x284/0x424 fs/namei.c:4359 ovl_do_mkdir fs/overlayfs/overlayfs.h:249 [inline] ovl_workdir_create+0x268/0x6ec fs/overlayfs/super.c:330 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir+0x2b4/0x11d8 fs/overlayfs/super.c:827 ovl_fill_super+0x1028/0x2c80 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb4/0x144 fs/super.c:1299 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:701 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x228/0x814 fs/namespace.c:3884 path_mount+0x5b4/0xde0 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (&dat_lock_key){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 nilfs_get_block+0x170/0x7a8 fs/nilfs2/inode.c:83 do_mpage_readpage+0x618/0x16f8 fs/mpage.c:222 mpage_readahead+0x2c8/0x530 fs/mpage.c:371 nilfs_readahead+0x28/0x38 fs/nilfs2/inode.c:156 read_pages+0x13c/0x4c8 mm/readahead.c:160 page_cache_ra_unbounded+0x21c/0x71c mm/readahead.c:264 do_page_cache_ra mm/readahead.c:327 [inline] page_cache_ra_order+0x938/0xb34 mm/readahead.c:532 do_sync_mmap_readahead+0x2f0/0x660 mm/filemap.c:-1 filemap_fault+0x600/0x1278 mm/filemap.c:3403 __do_fault+0xf8/0x498 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x2c00/0x4cec mm/memory.c:6309 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x1da4/0x30cc mm/gup.c:1491 populate_vma_page_range+0x218/0x2e8 mm/gup.c:1929 __mm_populate+0x208/0x330 mm/gup.c:2032 mm_populate include/linux/mm.h:3487 [inline] vm_mmap_pgoff+0x378/0x43c mm/util.c:584 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (mapping.invalidate_lock#9){.+.+}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x564/0x1278 mm/filemap.c:3391 __do_fault+0xf8/0x498 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x2c00/0x4cec mm/memory.c:6309 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x1da4/0x30cc mm/gup.c:1491 populate_vma_page_range+0x218/0x2e8 mm/gup.c:1929 __mm_populate+0x208/0x330 mm/gup.c:2032 mm_populate include/linux/mm.h:3487 [inline] vm_mmap_pgoff+0x378/0x43c mm/util.c:584 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#9 --> &sb->s_type->i_mutex_key#8 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#8); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#9); *** DEADLOCK *** 1 lock held by syz.5.253/8183: #0: ffff0000c25f4e50 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:184 [inline] #0: ffff0000c25f4e50 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x154/0x330 mm/gup.c:2011 stack backtrace: CPU: 0 UID: 0 PID: 8183 Comm: syz.5.253 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2079 check_noncircular+0x154/0x174 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 kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] filemap_fault+0x564/0x1278 mm/filemap.c:3391 __do_fault+0xf8/0x498 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x2c00/0x4cec mm/memory.c:6309 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x1da4/0x30cc mm/gup.c:1491 populate_vma_page_range+0x218/0x2e8 mm/gup.c:1929 __mm_populate+0x208/0x330 mm/gup.c:2032 mm_populate include/linux/mm.h:3487 [inline] vm_mmap_pgoff+0x378/0x43c mm/util.c:584 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600