NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/8068 is trying to acquire lock: 0000000083cb5afb (&tree->tree_lock/1){+.+.}, at: hfsplus_find_init+0x170/0x220 fs/hfsplus/bfind.c:33 but task is already holding lock: 00000000e2f24beb (&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_ext_write_extent+0x45b/0x5a0 fs/hfsplus/extents.c:104 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline] hfsplus_ext_read_extent+0x910/0xab0 fs/hfsplus/extents.c:218 hfsplus_file_extend+0x672/0xf40 fs/hfsplus/extents.c:461 hfsplus_get_block+0x196/0x960 fs/hfsplus/extents.c:245 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978 __block_write_begin fs/buffer.c:2028 [inline] block_write_begin+0x58/0x2e0 fs/buffer.c:2087 cont_write_begin+0x55a/0x820 fs/buffer.c:2440 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&tree->tree_lock/1){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_find_init+0x170/0x220 fs/hfsplus/bfind.c:33 hfsplus_file_truncate+0x297/0x1040 fs/hfsplus/extents.c:582 hfsplus_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock/1); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock/1); *** DEADLOCK *** 3 locks held by syz-executor.2/8068: #0: 0000000055f7ab72 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000055f7ab72 (sb_writers#16){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000301bb535 (&sb->s_type->i_mutex_key#23){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000301bb535 (&sb->s_type->i_mutex_key#23){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 00000000e2f24beb (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 8068 Comm: syz-executor.2 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_find_init+0x170/0x220 fs/hfsplus/bfind.c:33 hfsplus_file_truncate+0x297/0x1040 fs/hfsplus/extents.c:582 hfsplus_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 RIP: 0033:0x7ffadd80d0a9 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:00007ffadbd7f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ffadd92cf80 RCX: 00007ffadd80d0a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007ffadd868ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff16390e7f R14: 00007ffadbd7f300 R15: 0000000000022000 XFS (loop4): Superblock has unknown incompatible features (0x8) enabled. init_special_inode: bogus i_mode (170000) for inode loop1:7 XFS (loop4): Filesystem cannot be safely mounted by this kernel. XFS (loop4): SB validate failed with error -22. NILFS (loop5): broken superblock, retrying with spare superblock (blocksize = 1024) NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1804 audit(1672085015.373:97): pid=8073 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3609449084/syzkaller.KY0fbO/1791/bus" dev="sda1" ino=13941 res=1 init_special_inode: bogus i_mode (170000) for inode loop1:7 NILFS (loop5): broken superblock, retrying with spare superblock (blocksize = 1024) NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds XFS (loop3): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop4): Superblock has unknown incompatible features (0x8) enabled. XFS (loop3): Attempted to mount read-only compatible filesystem read-write. XFS (loop3): Filesystem can only be safely mounted read only. XFS (loop3): SB validate failed with error -22. XFS (loop4): Filesystem cannot be safely mounted by this kernel. XFS (loop4): SB validate failed with error -22. audit: type=1804 audit(1672085016.144:98): pid=8192 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3609449084/syzkaller.KY0fbO/1792/bus" dev="sda1" ino=13877 res=1 XFS (loop4): Superblock has unknown incompatible features (0x8) enabled. XFS (loop4): Filesystem cannot be safely mounted by this kernel. XFS (loop4): SB validate failed with error -22. audit: type=1804 audit(1672085016.524:99): pid=8278 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3609449084/syzkaller.KY0fbO/1793/bus" dev="sda1" ino=13905 res=1 XFS (loop4): Superblock has unknown incompatible features (0x8) enabled. XFS (loop4): Filesystem cannot be safely mounted by this kernel. XFS (loop4): SB validate failed with error -22. audit: type=1804 audit(1672085016.864:100): pid=8338 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3609449084/syzkaller.KY0fbO/1794/bus" dev="sda1" ino=13877 res=1 IPVS: ftp: loaded support on port[0] = 21 SQUASHFS error: Unable to read inode 0x11f SQUASHFS error: Unable to read inode 0x11f SQUASHFS error: Unable to read inode 0x11f SQUASHFS error: Unable to read inode 0x11f UBIFS error (pid: 8715): cannot open "ubi0", error -19 EXT4-fs (loop4): mounted filesystem without journal. Opts: nodiscard,barrier,nouid32,grpquota,,errors=continue EXT4-fs error (device loop4): ext4_xattr_block_get:534: inode #15: comm syz-executor.4: corrupted xattr block 33 UBIFS error (pid: 8742): cannot open "ubi0", error -19 UBIFS error (pid: 8754): cannot open "ubi0", error -19 EXT4-fs (loop4): mounted filesystem without journal. Opts: nodiscard,barrier,nouid32,grpquota,,errors=continue XFS (loop5): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop5): Attempted to mount read-only compatible filesystem read-write. XFS (loop5): Filesystem can only be safely mounted read only. XFS (loop5): SB validate failed with error -22. EXT4-fs (loop4): mounted filesystem without journal. Opts: nodiscard,barrier,nouid32,grpquota,,errors=continue EXT4-fs error (device loop4): ext4_xattr_block_get:534: inode #15: comm syz-executor.4: corrupted xattr block 33 EXT4-fs error (device loop4): ext4_xattr_block_get:534: inode #15: comm syz-executor.4: corrupted xattr block 33 UBIFS error (pid: 8845): cannot open "ubi0", error -19 XFS (loop5): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop5): Attempted to mount read-only compatible filesystem read-write. XFS (loop5): Filesystem can only be safely mounted read only. XFS (loop5): SB validate failed with error -22. XFS (loop5): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop5): Attempted to mount read-only compatible filesystem read-write. XFS (loop5): Filesystem can only be safely mounted read only. XFS (loop5): SB validate failed with error -22. audit: type=1804 audit(1672085022.674:101): pid=8945 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3263808862/syzkaller.wpsz0s/1797/file0" dev="sda1" ino=16374 res=1 XFS (loop5): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop5): Attempted to mount read-only compatible filesystem read-write. XFS (loop5): Filesystem can only be safely mounted read only. XFS (loop5): SB validate failed with error -22.