REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 4.14.302-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/9638 is trying to acquire lock: (&sbi->lock){+.+.}, at: [] reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 but task is already holding lock: (&type->i_mutex_dir_key#8/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] (&type->i_mutex_dir_key#8/1){+.+.}, at: [] filename_create+0x12a/0x3f0 fs/namei.c:3676 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&type->i_mutex_dir_key#8/1){+.+.}: down_write_nested+0x36/0x90 kernel/locking/rwsem.c:172 inode_lock_nested include/linux/fs.h:754 [inline] filename_create+0x12a/0x3f0 fs/namei.c:3676 user_path_create fs/namei.c:3734 [inline] SYSC_mkdirat fs/namei.c:3866 [inline] SyS_mkdirat+0x95/0x270 fs/namei.c:3858 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #1 (sb_writers#14){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1551 [inline] mnt_want_write_file+0xfd/0x3b0 fs/namespace.c:497 reiserfs_ioctl+0x18e/0x8b0 fs/reiserfs/ioctl.c:110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (&sbi->lock){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x130/0x400 fs/reiserfs/namei.c:363 lookup_real fs/namei.c:1555 [inline] __lookup_hash fs/namei.c:1575 [inline] __lookup_hash+0x1bb/0x270 fs/namei.c:1563 filename_create+0x156/0x3f0 fs/namei.c:3677 user_path_create fs/namei.c:3734 [inline] SYSC_mkdirat fs/namei.c:3866 [inline] SyS_mkdirat+0x95/0x270 fs/namei.c:3858 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Chain exists of: &sbi->lock --> sb_writers#14 --> &type->i_mutex_dir_key#8/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&type->i_mutex_dir_key#8/1); lock(sb_writers#14); lock(&type->i_mutex_dir_key#8/1); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor.0/9638: #0: (sb_writers#14){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#14){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#8/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #1: (&type->i_mutex_dir_key#8/1){+.+.}, at: [] filename_create+0x12a/0x3f0 fs/namei.c:3676 stack backtrace: CPU: 0 PID: 9638 Comm: syz-executor.0 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x130/0x400 fs/reiserfs/namei.c:363 lookup_real fs/namei.c:1555 [inline] __lookup_hash fs/namei.c:1575 [inline] __lookup_hash+0x1bb/0x270 fs/namei.c:1563 filename_create+0x156/0x3f0 fs/namei.c:3677 user_path_create fs/namei.c:3734 [inline] SYSC_mkdirat fs/namei.c:3866 [inline] SyS_mkdirat+0x95/0x270 fs/namei.c:3858 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fe3ec4db0c9 RSP: 002b:00007fe3eaa4d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fe3ec5faf80 RCX: 00007fe3ec4db0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007fe3ec536ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd256c465f R14: 00007fe3eaa4d300 R15: 0000000000022000 EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop3): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 1822, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 1822, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. Cannot find add_set index 0 as target capability: warning: `syz-executor.0' uses deprecated v2 capabilities in a way that may be insecure L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. audit: type=1326 audit(1673365261.973:2): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10105 comm="syz-executor.2" exe="/root/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f86c16470c9 code=0x0 audit: type=1804 audit(1673365263.063:3): pid=10213 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir808218567/syzkaller.7OYnwX/36/bus" dev="sda1" ino=13987 res=1 sctp: [Deprecated]: syz-executor.0 (pid 10325) Use of int in maxseg socket option. Use struct sctp_assoc_value instead syz-executor.2 uses obsolete (PF_INET,SOCK_PACKET) audit: type=1326 audit(1673365264.083:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10341 comm="syz-executor.1" exe="/root/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd12ce060c9 code=0x0 unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1