ocfs2: Mounting device (7,5) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.264/5644 is trying to acquire lock: ffff0000ce688650 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_setattr+0xb00/0x1930 fs/ocfs2/file.c:1263 but task is already holding lock: ffff0000e07d5be0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_setattr+0xaf4/0x1930 fs/ocfs2/file.c:1262 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&oi->ip_alloc_sem){++++}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x238/0x8f0 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+0x2e4/0x1d6c fs/ocfs2/dir.c:1091 ocfs2_rename+0x196c/0x30b4 fs/ocfs2/namei.c:1568 vfs_rename+0x95c/0xde0 fs/namei.c:4882 do_renameat2+0x744/0xa74 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5068 [inline] __se_sys_renameat2 fs/namei.c:5065 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5065 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #1 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x374/0x6cc fs/ocfs2/journal.c:374 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline] ocfs2_reserve_local_alloc_bits+0xb48/0x26c8 fs/ocfs2/localalloc.c:668 ocfs2_reserve_clusters_with_limit+0x188/0xa28 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223 ocfs2_mknod+0xcc8/0x2110 fs/ocfs2/namei.c:354 ocfs2_mkdir+0x19c/0x4f8 fs/ocfs2/namei.c:657 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (sb_internal#6){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x20c/0x6cc fs/ocfs2/journal.c:372 ocfs2_setattr+0xb00/0x1930 fs/ocfs2/file.c:1263 notify_change+0xb0c/0xdcc fs/attr.c:499 ovl_do_notify_change fs/overlayfs/overlayfs.h:142 [inline] ovl_workdir_create+0x4bc/0x658 fs/overlayfs/super.c:833 ovl_make_workdir fs/overlayfs/super.c:1389 [inline] ovl_get_workdir+0x318/0x10bc fs/overlayfs/super.c:1539 ovl_fill_super+0x1390/0x2240 fs/overlayfs/super.c:2095 mount_nodev+0x68/0x104 fs/super.c:1489 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5bc/0xe80 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 other info that might help us debug this: Chain exists of: sb_internal#6 --> &journal->j_trans_barrier --> &oi->ip_alloc_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_alloc_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_alloc_sem); lock(sb_internal#6); *** DEADLOCK *** 5 locks held by syz.5.264/5644: #0: ffff0000dbf8c0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1a4/0x800 fs/super.c:228 #1: ffff0000ce688460 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402 #2: ffff0000e07d5108 (&sb->s_type->i_mutex_key#27/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff0000e07d5108 (&sb->s_type->i_mutex_key#27/1){+.+.}-{3:3}, at: ovl_workdir_create+0x128/0x658 fs/overlayfs/super.c:771 #3: ffff0000e07d5f48 (&sb->s_type->i_mutex_key#38){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #3: ffff0000e07d5f48 (&sb->s_type->i_mutex_key#38){+.+.}-{3:3}, at: ovl_workdir_create+0x460/0x658 fs/overlayfs/super.c:832 #4: ffff0000e07d5be0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_setattr+0xaf4/0x1930 fs/ocfs2/file.c:1262 stack backtrace: CPU: 0 PID: 5644 Comm: syz.5.264 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call trace: dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048 check_noncircular+0x264/0x2f8 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x20c/0x6cc fs/ocfs2/journal.c:372 ocfs2_setattr+0xb00/0x1930 fs/ocfs2/file.c:1263 notify_change+0xb0c/0xdcc fs/attr.c:499 ovl_do_notify_change fs/overlayfs/overlayfs.h:142 [inline] ovl_workdir_create+0x4bc/0x658 fs/overlayfs/super.c:833 ovl_make_workdir fs/overlayfs/super.c:1389 [inline] ovl_get_workdir+0x318/0x10bc fs/overlayfs/super.c:1539 ovl_fill_super+0x1390/0x2240 fs/overlayfs/super.c:2095 mount_nodev+0x68/0x104 fs/super.c:1489 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5bc/0xe80 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.