hfsplus: xattr searching failed hfsplus: xattr searching failed ====================================================== WARNING: possible circular locking dependency detected 6.8.0-syzkaller-11752-gdba89d1b81df #0 Not tainted ------------------------------------------------------ syz-executor312/5206 is trying to acquire lock: ffff888020d300b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x886/0x9e0 fs/hfsplus/extents.c:595 but task is already holding lock: ffff88801ab387c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x204/0x9e0 fs/hfsplus/extents.c:576 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 hfsplus_file_extend+0x1c1/0x1090 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x31c/0x410 fs/hfsplus/btree.c:358 hfsplus_create_cat+0x213/0x10d0 fs/hfsplus/catalog.c:272 hfsplus_mknod+0x169/0x300 fs/hfsplus/dir.c:494 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3497 open_last_lookups fs/namei.c:3566 [inline] path_openat+0x92f/0x2990 fs/namei.c:3796 do_filp_open+0x1dc/0x430 fs/namei.c:3826 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 -> #0 (&tree->tree_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 hfsplus_file_truncate+0x886/0x9e0 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1eb/0x310 fs/hfsplus/inode.c:265 notify_change+0x742/0x11c0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 vfs_truncate+0x3ef/0x4e0 fs/open.c:111 do_sys_truncate fs/open.c:134 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x177/0x1f0 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); *** DEADLOCK *** 3 locks held by syz-executor312/5206: #0: ffff888020d32420 (sb_writers#10){.+.+}-{0:0}, at: vfs_truncate+0xea/0x4e0 fs/open.c:84 #1: ffff88801ab389c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #1: ffff88801ab389c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:63 #2: ffff88801ab387c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x204/0x9e0 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 5206 Comm: syz-executor312 Not tainted 6.8.0-syzkaller-11752-gdba89d1b81df #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 hfsplus_file_truncate+0x886/0x9e0 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1eb/0x310 fs/hfsplus/inode.c:265 notify_change+0x742/0x11c0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 vfs_truncate+0x3ef/0x4e0 fs/open.c:111 do_sys_truncate fs/open.c:134 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x177/0x1f0 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f87e5f33639 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fff6803ebe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007fff6803edc8 RCX: 00007f87e5f33639 RDX: 00007f87e5f33639 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f87e5fa6610 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000063c R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff6803edb8 R14: 0000000000000001 R15: 0000000000000001