============================================ WARNING: possible recursive locking detected 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 Not tainted -------------------------------------------- syz-executor324/5218 is trying to acquire lock: ffff88802e9e1548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260 but task is already holding lock: ffff88802e9e22c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x30a/0xc70 fs/hfsplus/extents.c:577 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by syz-executor324/5218: #0: ffff888027b46420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff88802e9e1df8 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline] #1: ffff88802e9e1df8 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4520 #2: ffff88802e9e24b8 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #2: ffff88802e9e24b8 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4458 #3: ffff888141ab5998 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x161/0x790 fs/hfsplus/dir.c:370 #4: ffff88802e9e22c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x30a/0xc70 fs/hfsplus/extents.c:577 #5: ffff888141ab58f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xbb/0x4e0 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 UID: 0 PID: 5218 Comm: syz-executor324 Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260 block_read_full_folio+0x418/0xcd0 fs/buffer.c:2401 filemap_read_folio+0x14b/0x630 mm/filemap.c:2367 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3825 do_read_cache_page+0x30/0x200 mm/filemap.c:3891 read_mapping_page include/linux/pagemap.h:1005 [inline] hfsplus_block_free+0x128/0x4e0 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x17a/0xae0 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0x86c/0xc70 fs/hfsplus/extents.c:592 hfsplus_delete_inode+0x174/0x220 hfsplus_unlink+0x512/0x790 fs/hfsplus/dir.c:405 vfs_unlink+0x365/0x650 fs/namei.c:4469 do_unlinkat+0x4ae/0x830 fs/namei.c:4533 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0d5c50fb17 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe83106198 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0d5c50fb17 RDX: 00007ffe831061c0 RSI: 00007ffe83106250 RDI: 00007ffe83106250 RBP: 00007ffe83106250 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe83107340 R13: 00005555733d8700 R14: 0000000000000001 R15: 431bde82d7b634db hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent