XFS (loop1): Unmounting Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/6551 is trying to acquire lock: ffff0000da8340f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_free+0xc0/0x48c fs/hfsplus/bitmap.c:182 but task is already holding lock: ffff0000cc8e1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x21c/0xa40 fs/hfsplus/extents.c:573 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 hfsplus_get_block+0x2d4/0x1244 fs/hfsplus/extents.c:260 block_read_full_folio+0x2ec/0x824 fs/buffer.c:2420 hfsplus_read_folio+0x28/0x38 fs/hfsplus/inode.c:28 filemap_read_folio+0xec/0x2f8 mm/filemap.c:2444 do_read_cache_folio+0x364/0x5bc mm/filemap.c:4036 do_read_cache_page mm/filemap.c:4102 [inline] read_cache_page+0x6c/0x160 mm/filemap.c:4111 read_mapping_page include/linux/pagemap.h:993 [inline] hfsplus_block_allocate+0xe4/0x91c fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0x774/0x1530 fs/hfsplus/extents.c:464 hfsplus_get_block+0x32c/0x1244 fs/hfsplus/extents.c:245 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x10bc/0x2818 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3509 [inline] hfsplus_direct_IO+0xf0/0x1d0 fs/hfsplus/inode.c:131 generic_file_direct_write+0x1a8/0x350 mm/filemap.c:4188 __generic_file_write_iter+0x10c/0x204 mm/filemap.c:4357 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4397 iter_file_splice_write+0x770/0xd7c fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0xec/0x14c fs/splice.c:1161 splice_direct_to_actor+0x414/0x994 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x130/0x210 fs/splice.c:1230 do_sendfile+0x3cc/0x658 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __arm64_sys_sendfile64+0x1b4/0x274 fs/read_write.c:1417 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&sbi->alloc_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 hfsplus_block_free+0xc0/0x48c fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x108/0x890 fs/hfsplus/extents.c:360 hfsplus_file_truncate+0x5d8/0xa40 fs/hfsplus/extents.c:588 hfsplus_delete_inode+0x164/0x210 fs/hfsplus/inode.c:-1 hfsplus_unlink+0x404/0x63c fs/hfsplus/dir.c:405 vfs_unlink+0x2e0/0x520 fs/namei.c:4673 do_unlinkat+0x2b8/0x488 fs/namei.c:4737 __do_sys_unlinkat fs/namei.c:4778 [inline] __se_sys_unlinkat fs/namei.c:4771 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4771 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); *** DEADLOCK *** 5 locks held by syz-executor/6551: #0: ffff0000dc7be420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:508 #1: ffff0000db30e838 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline] #1: ffff0000db30e838 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: do_unlinkat+0x190/0x488 fs/namei.c:4724 #2: ffff0000cc8e1df8 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #2: ffff0000cc8e1df8 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: vfs_unlink+0xd0/0x520 fs/namei.c:4662 #3: ffff0000da834198 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_unlink+0x140/0x63c fs/hfsplus/dir.c:370 #4: ffff0000cc8e1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x21c/0xa40 fs/hfsplus/extents.c:573 stack backtrace: CPU: 0 UID: 0 PID: 6551 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 hfsplus_block_free+0xc0/0x48c fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x108/0x890 fs/hfsplus/extents.c:360 hfsplus_file_truncate+0x5d8/0xa40 fs/hfsplus/extents.c:588 hfsplus_delete_inode+0x164/0x210 fs/hfsplus/inode.c:-1 hfsplus_unlink+0x404/0x63c fs/hfsplus/dir.c:405 vfs_unlink+0x2e0/0x520 fs/namei.c:4673 do_unlinkat+0x2b8/0x488 fs/namei.c:4737 __do_sys_unlinkat fs/namei.c:4778 [inline] __se_sys_unlinkat fs/namei.c:4771 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4771 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 init_special_inode: bogus i_mode (174377) for inode loop1:21