====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/13375 is trying to acquire lock: 00000000a2f77ae7 (&tree->tree_lock#2){+.+.}, at: hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 but task is already holding lock: 0000000023825ae9 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 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){+.+.}: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 hfsplus_create_cat+0x1e3/0x1210 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0x14a8/0x19e0 fs/hfsplus/super.c:560 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&tree->tree_lock#2){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 hfsplus_delete_inode+0x18d/0x220 fs/hfsplus/inode.c:419 hfsplus_unlink+0x595/0x820 fs/hfsplus/dir.c:405 hfsplus_rename+0xbe/0x200 fs/hfsplus/dir.c:545 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_renameat2 fs/namei.c:4664 [inline] __se_sys_renameat2 fs/namei.c:4661 [inline] __x64_sys_renameat2+0xba/0x150 fs/namei.c:4661 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock#2); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock#2); *** DEADLOCK *** 8 locks held by syz-executor.5/13375: #0: 00000000c2e6ac46 (sb_writers#30){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000c2e6ac46 (sb_writers#30){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000636379a8 (&type->s_vfs_rename_key#3){+.+.}, at: lock_rename+0x54/0x280 fs/namei.c:2867 #2: 000000003887a542 (&type->i_mutex_dir_key#17/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #2: 000000003887a542 (&type->i_mutex_dir_key#17/1){+.+.}, at: lock_rename+0x132/0x280 fs/namei.c:2878 #3: 00000000987d4983 (&type->i_mutex_dir_key#17/2){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #3: 00000000987d4983 (&type->i_mutex_dir_key#17/2){+.+.}, at: lock_rename+0x166/0x280 fs/namei.c:2879 #4: 00000000c3b80c1f (&sb->s_type->i_mutex_key#35){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #4: 00000000c3b80c1f (&sb->s_type->i_mutex_key#35){+.+.}, at: lock_two_nondirectories+0xec/0x110 fs/inode.c:1015 #5: 0000000036e10ca4 (&sb->s_type->i_mutex_key#35/4){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #5: 0000000036e10ca4 (&sb->s_type->i_mutex_key#35/4){+.+.}, at: lock_two_nondirectories+0xd1/0x110 fs/inode.c:1017 #6: 00000000d4ef0119 (&sbi->vh_mutex){+.+.}, at: hfsplus_unlink+0x140/0x820 fs/hfsplus/dir.c:370 #7: 0000000023825ae9 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 stack backtrace: CPU: 1 PID: 13375 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 hfsplus_delete_inode+0x18d/0x220 fs/hfsplus/inode.c:419 hfsplus_unlink+0x595/0x820 fs/hfsplus/dir.c:405 hfsplus_rename+0xbe/0x200 fs/hfsplus/dir.c:545 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_renameat2 fs/namei.c:4664 [inline] __se_sys_renameat2 fs/namei.c:4661 [inline] __x64_sys_renameat2+0xba/0x150 fs/namei.c:4661 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f76e43510d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f76e28c3168 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007f76e4470f80 RCX: 00007f76e43510d9 RDX: 0000000000000006 RSI: 0000000020000000 RDI: 0000000000000007 RBP: 00007f76e43acae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd085e037f R14: 00007f76e28c3300 R15: 0000000000022000 netlink: 104 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 104 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 104 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 304 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 324 bytes leftover after parsing attributes in process `syz-executor.3'. hfsplus: unable to parse mount options netlink: 280 bytes leftover after parsing attributes in process `syz-executor.3'. hfsplus: unable to parse mount options nla_parse: 1 callbacks suppressed netlink: 304 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 324 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 280 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 328 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 304 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 324 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 280 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 328 bytes leftover after parsing attributes in process `syz-executor.0'. wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)