====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.1062/7728 is trying to acquire lock: ffff88805fe1a2e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x237/0x8d0 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff8880607530e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe0/0x4c0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x13c8/0x1750 fs/ocfs2/quota_local.c:764 dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2463 dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2500 ocfs2_enable_quotas+0x1c5/0x490 fs/ocfs2/super.c:927 ocfs2_fill_super+0x3cd2/0x50f0 fs/ocfs2/super.c:1140 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_setattr+0xbc2/0x1ad0 fs/ocfs2/file.c:1266 notify_change+0xbcd/0xee0 fs/attr.c:505 chown_common+0x4a7/0x660 fs/open.c:680 do_fchownat+0x147/0x240 fs/open.c:711 __do_sys_chown fs/open.c:731 [inline] __se_sys_chown fs/open.c:729 [inline] __x64_sys_chown+0x7e/0x90 fs/open.c:729 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x237/0x8d0 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3ca/0x2060 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0xdb/0x2f0 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 ocfs2_find_victim_alloc_group+0x19e/0x960 fs/ocfs2/move_extents.c:385 ocfs2_move_extent fs/ocfs2/move_extents.c:656 [inline] __ocfs2_move_extents_range+0x1cac/0x35d0 fs/ocfs2/move_extents.c:866 ocfs2_move_extents+0x3ad/0x9c0 fs/ocfs2/move_extents.c:938 ocfs2_ioctl_move_extents+0x523/0x6c0 fs/ocfs2/move_extents.c:1064 ocfs2_ioctl+0x31f/0x7a0 fs/ocfs2/ioctl.c:931 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> sb_internal#5 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#5); lock(&journal->j_trans_barrier); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 9 locks held by syz.2.1062/7728: #0: ffff88801e110460 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write_file+0x5c/0x200 fs/namespace.c:430 #1: ffff88805fdf6d88 (&sb->s_type->i_mutex_key#32){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88805fdf6d88 (&sb->s_type->i_mutex_key#32){+.+.}-{3:3}, at: ocfs2_move_extents+0x19e/0x9c0 fs/ocfs2/move_extents.c:916 #2: ffff88805fdf6a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_move_extents+0x3a0/0x9c0 fs/ocfs2/move_extents.c:936 #3: ffff88805fe1ed88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #3: ffff88805fe1ed88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16a/0x44d0 fs/ocfs2/suballoc.c:782 #4: ffff88805fe1d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #4: ffff88805fe1d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:638 [inline] #4: ffff88805fe1d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x137d/0x35d0 fs/ocfs2/move_extents.c:866 #5: ffff88805fe09808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #5: ffff88805fe09808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:646 [inline] #5: ffff88805fe09808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: __ocfs2_move_extents_range+0x1a5f/0x35d0 fs/ocfs2/move_extents.c:866 #6: ffff88801e110650 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:648 [inline] #6: ffff88801e110650 (sb_internal#5){.+.+}-{0:0}, at: __ocfs2_move_extents_range+0x1a73/0x35d0 fs/ocfs2/move_extents.c:866 #7: ffff8880607530e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 #8: ffff88801bede990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x134c/0x15c0 fs/jbd2/transaction.c:462 stack backtrace: CPU: 1 PID: 7728 Comm: syz.2.1062 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x237/0x8d0 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3ca/0x2060 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0xdb/0x2f0 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 ocfs2_find_victim_alloc_group+0x19e/0x960 fs/ocfs2/move_extents.c:385 ocfs2_move_extent fs/ocfs2/move_extents.c:656 [inline] __ocfs2_move_extents_range+0x1cac/0x35d0 fs/ocfs2/move_extents.c:866 ocfs2_move_extents+0x3ad/0x9c0 fs/ocfs2/move_extents.c:938 ocfs2_ioctl_move_extents+0x523/0x6c0 fs/ocfs2/move_extents.c:1064 ocfs2_ioctl+0x31f/0x7a0 fs/ocfs2/ioctl.c:931 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fbf6d20ef79 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:00007fbf6b448028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbf6d489090 RCX: 00007fbf6d20ef79 RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004 RBP: 00007fbf6d2a57e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbf6d489128 R14: 00007fbf6d489090 R15: 00007ffd90f2b548