====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/9830 is trying to acquire lock: 00000000b1be522a (sb_writers#15){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] 00000000b1be522a (sb_writers#15){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 but task is already holding lock: 00000000abab22a2 (&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){+.+.}: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x171/0x490 fs/reiserfs/namei.c:363 __lookup_slow+0x246/0x4a0 fs/namei.c:1672 lookup_one_len+0x163/0x190 fs/namei.c:2544 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:970 reiserfs_fill_super+0x1f12/0x2d80 fs/reiserfs/super.c:2187 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 -> #1 (&type->i_mutex_dir_key#8){+.+.}: inode_lock include/linux/fs.h:748 [inline] do_last fs/namei.c:3324 [inline] path_openat+0x1071/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (sb_writers#15){.+.+}: 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+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 reiserfs_ioctl+0x1a7/0x9a0 fs/reiserfs/ioctl.c:110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 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: Chain exists of: sb_writers#15 --> &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#15); *** DEADLOCK *** 1 lock held by syz-executor.3/9830: #0: 00000000abab22a2 (&sbi->lock){+.+.}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 0 PID: 9830 Comm: syz-executor.3 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 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+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 reiserfs_ioctl+0x1a7/0x9a0 fs/reiserfs/ioctl.c:110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff25636c0d9 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:00007ff2548de168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff25648bf80 RCX: 00007ff25636c0d9 RDX: 0000000020000180 RSI: 0000000040087602 RDI: 0000000000000005 RBP: 00007ff2563c7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea8563c0f R14: 00007ff2548de300 R15: 0000000000022000 EXT4-fs (loop5): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 62 with error 28 EXT4-fs (loop5): This should not happen!! Data will be lost EXT4-fs (loop5): Total free blocks count 0 EXT4-fs (loop5): Free/Dirty block details EXT4-fs (loop5): free_blocks=2415919104 EXT4-fs (loop5): dirty_blocks=64 EXT4-fs (loop5): Block reservation details EXT4-fs (loop5): i_reserved_data_blocks=4 EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop2): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 312 with error 28 EXT4-fs (loop2): This should not happen!! Data will be lost EXT4-fs (loop2): Total free blocks count 0 EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. EXT4-fs (loop2): Free/Dirty block details netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. EXT4-fs (loop2): free_blocks=2415919104 EXT4-fs (loop2): dirty_blocks=320 EXT4-fs (loop2): Block reservation details EXT4-fs (loop2): i_reserved_data_blocks=20 overlayfs: missing 'lowerdir' EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. REISERFS (device loop3): checking transaction log (loop3) netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' overlayfs: missing 'lowerdir' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' BTRFS: device fsid 11f48b31-c56c-4ac8-b2ac-117247207a11 devid 1 transid 8 /dev/loop2 BTRFS info (device loop2): force clearing of disk cache BTRFS info (device loop2): enabling inode map caching BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): turning on discard BTRFS info (device loop2): unrecognized mount option 'ref_verify' BTRFS error (device loop2): open_ctree failed tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' 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 loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. BTRFS info (device loop4): force clearing of disk cache BTRFS info (device loop4): enabling inode map caching BTRFS info (device loop4): max_inline at 0 BTRFS info (device loop4): max_inline at 0 BTRFS info (device loop4): turning on discard BTRFS info (device loop4): unrecognized mount option 'ref_verify' BTRFS error (device loop4): open_ctree failed BTRFS info (device loop2): force clearing of disk cache BTRFS info (device loop2): enabling inode map caching BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): turning on discard BTRFS info (device loop2): unrecognized mount option 'ref_verify' BTRFS error (device loop2): open_ctree failed tmpfs: Bad value 'within_sizeŻ' for mount option 'huge' IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. 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 loop0): Using r5 hash to sort names IPVS: ftp: loaded support on port[0] = 21 REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (10121) BTRFS info (device loop2): force clearing of disk cache BTRFS info (device loop2): enabling inode map caching BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): max_inline at 0 BTRFS info (device loop2): turning on discard BTRFS info (device loop2): unrecognized mount option 'ref_verify' BTRFS error (device loop2): open_ctree failed IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.