====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc5-syzkaller-gec4801305969 #0 Not tainted ------------------------------------------------------ syz.5.139/7405 is trying to acquire lock: ffff00012e522640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff00012e522640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] ffff00012e522640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860 but task is already holding lock: ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline] ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0xe58/0x2abc fs/ocfs2/move_extents.c:860 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] __ocfs2_flush_truncate_log+0x2e8/0xf6c fs/ocfs2/alloc.c:6054 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6084 [inline] ocfs2_truncate_log_worker+0xa8/0x1a0 fs/ocfs2/alloc.c:6097 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:843 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860 ocfs2_move_extents+0x314/0x7f0 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x424/0x5f0 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x1c4/0x738 fs/ocfs2/ioctl.c:946 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); *** DEADLOCK *** 5 locks held by syz.5.139/7405: #0: ffff0000c57fe428 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:601 #1: ffff0001ffabc9c0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff0001ffabc9c0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: ocfs2_move_extents+0x16c/0x7f0 fs/ocfs2/move_extents.c:905 #2: ffff0001ffabc660 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_move_extents+0x308/0x7f0 fs/ocfs2/move_extents.c:925 #3: ffff00012e51df40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #3: ffff00012e51df40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #4: ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #4: ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline] #4: ffff00012e51c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0xe58/0x2abc fs/ocfs2/move_extents.c:860 stack backtrace: CPU: 0 UID: 0 PID: 7405 Comm: syz.5.139 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline] __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860 ocfs2_move_extents+0x314/0x7f0 fs/ocfs2/move_extents.c:927 ocfs2_ioctl_move_extents+0x424/0x5f0 fs/ocfs2/move_extents.c:1053 ocfs2_ioctl+0x1c4/0x738 fs/ocfs2/ioctl.c:946 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596