REISERFS (device loop5): checking transaction log (loop5) REISERFS (device loop5): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 4.14.307-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/9943 is trying to acquire lock: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] (sb_writers#13){.+.+}, at: [] mnt_want_write_file+0xfd/0x3b0 fs/namespace.c:497 but task is already holding lock: (&sbi->lock){+.+.}, at: [] reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->lock){+.+.}: __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 lookup_one_len+0x279/0x3a0 fs/namei.c:2539 reiserfs_lookup_privroot+0x92/0x270 fs/reiserfs/xattr.c:970 reiserfs_fill_super+0x1772/0x2990 fs/reiserfs/super.c:2199 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #1 (&type->i_mutex_dir_key#8){+.+.}: down_write+0x34/0x90 kernel/locking/rwsem.c:54 inode_lock include/linux/fs.h:719 [inline] do_last fs/namei.c:3331 [inline] path_openat+0xde2/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (sb_writers#13){.+.+}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 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 other info that might help us debug this: Chain exists of: sb_writers#13 --> &type->i_mutex_dir_key#8 --> &sbi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#8); lock(&sbi->lock); lock(sb_writers#13); *** DEADLOCK *** 1 lock held by syz-executor.5/9943: #0: (&sbi->lock){+.+.}, at: [] reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 1 PID: 9943 Comm: syz-executor.5 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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 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 RIP: 0033:0x7f077afa30f9 RSP: 002b:00007f0779515168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f077b0c2f80 RCX: 00007f077afa30f9 RDX: 0000000000000000 RSI: 0000000040087602 RDI: 0000000000000005 RBP: 00007f077affeae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9bf5ee5f R14: 00007f0779515300 R15: 0000000000022000 REISERFS (device loop4): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): using ordered data mode REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers reiserfs: using flush barriers REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): checking transaction log (loop5) REISERFS (device loop5): Using r5 hash to sort names REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 reiserfs: enabling write barrier flush mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal REISERFS (device loop4): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): using ordered data mode REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop5): checking transaction log (loop5) reiserfs: enabling write barrier flush mode REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop5): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal REISERFS (device loop4): using ordered data mode REISERFS (device loop5): using ordered data mode reiserfs: using flush barriers reiserfs: using flush barriers REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): checking transaction log (loop5) REISERFS (device loop5): Using r5 hash to sort names REISERFS (device loop4): checking transaction log (loop4) reiserfs: enabling write barrier flush mode REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. reiserfs: enabling write barrier flush mode REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. audit: type=1326 audit(1677591657.478:3): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=10164 comm="syz-executor.2" exe="/root/syz-executor.2" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76ab8bc0f9 code=0x0 Zero length message leads to an empty skb XFS (loop2): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop2): Attempted to mount read-only compatible filesystem read-write. XFS (loop2): Filesystem can only be safely mounted read only. XFS (loop2): SB validate failed with error -22. netlink: 60 bytes leftover after parsing attributes in process `syz-executor.5'. ip6tnl0: Invalid MTU 536871616 requested, hw max 65407 ip6tnl0: Invalid MTU 0 requested, hw min 68 IPVS: set_ctl: invalid protocol: 0 172.30.0.1:0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 65284 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. x_tables: ip6_tables: TCPOPTSTRIP target: only valid for protocol 6 tc_ctl_action: received NO action attribs unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 audit: type=1804 audit(1677591662.118:4): pid=10975 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir1281959850/syzkaller.jZfmL7/80/file0/bus" dev="loop2" ino=3 res=1 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) attempt to access beyond end of device loop2: rw=2049, want=2052, limit=2048 audit: type=1804 audit(1677591662.228:5): pid=11000 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir1281959850/syzkaller.jZfmL7/80/file0/bus" dev="loop2" ino=3 res=1 attempt to access beyond end of device loop2: rw=1, want=2064, limit=2048 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) audit: type=1804 audit(1677591662.978:6): pid=11046 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir1281959850/syzkaller.jZfmL7/81/bus" dev="sda1" ino=13999 res=1 audit: type=1804 audit(1677591662.988:7): pid=11049 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir1281959850/syzkaller.jZfmL7/81/bus" dev="sda1" ino=13999 res=1 process 'syz-executor.1' launched '/dev/fd/3/./file1' with NULL argv: empty string added audit: type=1804 audit(1677591663.918:8): pid=11147 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:9): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 attempt to access beyond end of device loop2: rw=1, want=2064, limit=2048 audit: type=1804 audit(1677591663.948:10): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:11): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:12): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:13): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:14): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1 audit: type=1804 audit(1677591663.948:15): pid=11145 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name=2F726F6F742F73797A6B616C6C65722D74657374646972313238313935393835302F73797A6B616C6C65722E6A5A666D4C372F38322FFE882F627573 dev="loop2" ino=4 res=1