====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.5.390/7938 is trying to acquire lock: ffff8880662ca640 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] ffff8880662ca640 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xea/0xba0 fs/ocfs2/localalloc.c:636 but task is already holding lock: ffff8880662cbf60 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: __ocfs2_change_file_space+0xc95/0x1210 fs/ocfs2/file.c:2021 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&oi->ip_alloc_sem){+.+.}-{4:4}: down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:933 ocfs2_xattr_set+0x1057/0x2b60 fs/ocfs2/xattr.c:3699 ocfs2_set_acl+0x469/0x550 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:287 set_posix_acl+0x263/0x320 fs/posix_acl.c:954 vfs_set_acl+0x468/0x900 fs/posix_acl.c:1133 do_set_acl+0x14c/0x1a0 fs/posix_acl.c:1278 do_setxattr+0xeb/0x180 fs/xattr.c:633 filename_setxattr+0x16e/0x1d0 fs/xattr.c:665 path_setxattrat+0x1ff/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xc6/0x140 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x99/0x460 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1719/0x2750 fs/ocfs2/namei.c:414 ocfs2_create+0xf4/0x3f0 fs/ocfs2/namei.c:677 lookup_open.isra.0+0x139b/0x1890 fs/namei.c:4449 open_last_lookups fs/namei.c:4549 [inline] path_openat+0x117d/0x3120 fs/namei.c:4793 do_filp_open+0x1f7/0x420 fs/namei.c:4823 do_sys_openat2+0x12e/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x99/0x460 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x5c8/0x920 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x280/0x9b0 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1ee/0x8a0 fs/ocfs2/super.c:1825 generic_shutdown_super+0x15f/0x360 fs/super.c:643 kill_block_super+0x3b/0xa0 fs/super.c:1722 deactivate_locked_super+0xc1/0x1b0 fs/super.c:474 deactivate_super fs/super.c:507 [inline] deactivate_super+0xe7/0x110 fs/super.c:503 cleanup_mnt+0x21f/0x450 fs/namespace.c:1318 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x100/0x4b0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x4fe/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#3){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x4b7/0x920 fs/ocfs2/journal.c:370 ocfs2_mknod+0x15ea/0x2750 fs/ocfs2/namei.c:365 ocfs2_create+0xf4/0x3f0 fs/ocfs2/namei.c:677 lookup_open.isra.0+0x139b/0x1890 fs/namei.c:4449 open_last_lookups fs/namei.c:4549 [inline] path_openat+0x117d/0x3120 fs/namei.c:4793 do_filp_open+0x1f7/0x420 fs/namei.c:4823 do_sys_openat2+0x12e/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_reserve_local_alloc_bits+0xea/0xba0 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x55a/0xe80 fs/ocfs2/suballoc.c:1169 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline] ocfs2_lock_allocators+0x1ca/0x5c0 fs/ocfs2/suballoc.c:2783 ocfs2_extend_allocation+0x284/0x18c0 fs/ocfs2/file.c:589 ocfs2_allocate_unwritten_extents+0x23b/0x750 fs/ocfs2/file.c:1502 __ocfs2_change_file_space+0xce3/0x1210 fs/ocfs2/file.c:2029 ocfs2_fallocate+0x26f/0x2f0 fs/ocfs2/file.c:2144 vfs_fallocate+0x576/0x10d0 fs/open.c:339 ksys_fallocate fs/open.c:363 [inline] __do_sys_fallocate fs/open.c:368 [inline] __se_sys_fallocate fs/open.c:366 [inline] __x64_sys_fallocate+0xd5/0x140 fs/open.c:366 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE] --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_alloc_sem); lock(&oi->ip_xattr_sem); lock(&oi->ip_alloc_sem); lock(&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.5.390/7938: #0: ffff888032528420 (sb_writers#22){.+.+}-{0:0}, at: ksys_fallocate fs/open.c:363 [inline] #0: ffff888032528420 (sb_writers#22){.+.+}-{0:0}, at: __do_sys_fallocate fs/open.c:368 [inline] #0: ffff888032528420 (sb_writers#22){.+.+}-{0:0}, at: __se_sys_fallocate fs/open.c:366 [inline] #0: ffff888032528420 (sb_writers#22){.+.+}-{0:0}, at: __x64_sys_fallocate+0xd5/0x140 fs/open.c:366 #1: ffff8880662cc2c0 (&sb->s_type->i_mutex_key#33){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #1: ffff8880662cc2c0 (&sb->s_type->i_mutex_key#33){+.+.}-{4:4}, at: __ocfs2_change_file_space+0x178/0x1210 fs/ocfs2/file.c:1955 #2: ffff8880662cbf60 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: __ocfs2_change_file_space+0xc95/0x1210 fs/ocfs2/file.c:2021 stack backtrace: CPU: 1 UID: 0 PID: 7938 Comm: syz.5.390 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_reserve_local_alloc_bits+0xea/0xba0 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x55a/0xe80 fs/ocfs2/suballoc.c:1169 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline] ocfs2_lock_allocators+0x1ca/0x5c0 fs/ocfs2/suballoc.c:2783 ocfs2_extend_allocation+0x284/0x18c0 fs/ocfs2/file.c:589 ocfs2_allocate_unwritten_extents+0x23b/0x750 fs/ocfs2/file.c:1502 __ocfs2_change_file_space+0xce3/0x1210 fs/ocfs2/file.c:2029 ocfs2_fallocate+0x26f/0x2f0 fs/ocfs2/file.c:2144 vfs_fallocate+0x576/0x10d0 fs/open.c:339 ksys_fallocate fs/open.c:363 [inline] __do_sys_fallocate fs/open.c:368 [inline] __se_sys_fallocate fs/open.c:366 [inline] __x64_sys_fallocate+0xd5/0x140 fs/open.c:366 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f14fb59acb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f14fc3d8028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f14fb816180 RCX: 00007f14fb59acb9 RDX: 000000000000effb RSI: 0000000000000000 RDI: 0000000000000008 RBP: 00007f14fb608bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f14fb816218 R14: 00007f14fb816180 R15: 00007ffcb21b3bb8