====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00275-gbec6f00f120e #0 Not tainted ------------------------------------------------------ syz.5.241/7682 is trying to acquire lock: ffff888027118870 (&dat_lock_key){.+.+}-{4:4}, at: nilfs_get_block+0x1b1/0x8f0 fs/nilfs2/inode.c:83 but task is already holding lock: ffff888051f9a420 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] ffff888051f9a420 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (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 faultin_page mm/gup.c:1193 [inline] __get_user_pages+0x16f0/0x2a40 mm/gup.c:1491 __get_user_pages_locked mm/gup.c:1757 [inline] __gup_longterm_locked+0xd66/0x15b0 mm/gup.c:2523 gup_fast_fallback+0x1843/0x1d60 mm/gup.c:3417 iov_iter_extract_user_pages lib/iov_iter.c:1849 [inline] iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1912 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:213 [inline] do_direct_IO fs/direct-io.c:915 [inline] __blockdev_direct_IO+0x10ed/0x3310 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3422 [inline] nilfs_direct_IO+0xed/0x120 fs/nilfs2/inode.c:267 generic_file_read_iter+0x319/0x510 mm/filemap.c:2871 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 -> #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:3881 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4409 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 do_mpage_readpage+0x86d/0x19a0 fs/mpage.c:222 mpage_read_folio+0x14a/0x220 fs/mpage.c:389 filemap_read_folio+0x114/0x380 mm/filemap.c:2401 do_read_cache_folio+0x354/0x590 mm/filemap.c:3885 read_mapping_folio include/linux/pagemap.h:995 [inline] nilfs_get_folio+0x4a/0x160 fs/nilfs2/dir.c:190 nilfs_dotdot+0x3f/0x3f0 fs/nilfs2/dir.c:359 nilfs_rename+0x257/0x820 fs/nilfs2/namei.c:391 vfs_rename+0xb99/0xec0 fs/namei.c:5121 do_renameat2+0x878/0xc50 fs/namei.c:5270 __do_sys_rename fs/namei.c:5317 [inline] __se_sys_rename fs/namei.c:5315 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5315 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 do_mpage_readpage+0x86d/0x19a0 fs/mpage.c:222 mpage_readahead+0x398/0x650 fs/mpage.c:371 read_pages+0x177/0x590 mm/readahead.c:160 page_cache_ra_unbounded+0x6b0/0x7b0 mm/readahead.c:297 do_sync_mmap_readahead+0x4b5/0x5f0 mm/filemap.c:3262 filemap_fault+0x62a/0x1200 mm/filemap.c:3403 __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 --> &mm->mmap_lock --> mapping.invalidate_lock#11 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#11); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#11); rlock(&dat_lock_key); *** DEADLOCK *** 1 lock held by syz.5.241/7682: #0: ffff888051f9a420 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] #0: ffff888051f9a420 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228 stack backtrace: CPU: 0 UID: 0 PID: 7682 Comm: syz.5.241 Not tainted 6.15.0-rc5-syzkaller-00275-gbec6f00f120e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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 do_mpage_readpage+0x86d/0x19a0 fs/mpage.c:222 mpage_readahead+0x398/0x650 fs/mpage.c:371 read_pages+0x177/0x590 mm/readahead.c:160 page_cache_ra_unbounded+0x6b0/0x7b0 mm/readahead.c:297 do_sync_mmap_readahead+0x4b5/0x5f0 mm/filemap.c:3262 filemap_fault+0x62a/0x1200 mm/filemap.c:3403 __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: 0033:0x7f4adf956807 Code: ce 48 ff c7 48 01 fe 48 8d 54 11 80 0f 1f 80 00 00 00 00 c5 fe 6f 0e c5 fe 6f 56 20 c5 fe 6f 5e 40 c5 fe 6f 66 60 48 83 ee 80 fd 7f 0f c5 fd 7f 57 20 c5 fd 7f 5f 40 c5 fd 7f 67 60 48 83 ef RSP: 002b:00007fff8cc1eb78 EFLAGS: 00010207 RAX: 00002000000011c0 RBX: 0000000000000004 RCX: 00002000000011c0 RDX: 00002000000015ec RSI: 00007f4adf401347 RDI: 00002000000011e0 RBP: 00007fff8cc1ec48 R08: 0000000000000000 R09: 0000000000000012 R10: 0000000000000000 R11: 0000000000000001 R12: 00007f4adfbb5fac R13: 00007f4adfbb5fa0 R14: fffffffffffffffe R15: 00007fff8cc1ec90