====================================================== WARNING: possible circular locking dependency detected 5.15.185-syzkaller #0 Not tainted ------------------------------------------------------ syz.9.340/6671 is trying to acquire lock: ffff0000ef54bf60 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x228/0x858 fs/ocfs2/extent_map.c:976 but task is already holding lock: ffff0000e8742990 (jbd2_handle ){++++}-{0:0}, at: start_this_handle+0xecc/0x11a4 fs/jbd2/transaction.c:462 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0xef4/0x11a4 fs/jbd2/transaction.c:464 jbd2__journal_start+0x28c/0x744 fs/jbd2/transaction.c:521 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:560 ocfs2_start_trans+0x43c/0x794 fs/ocfs2/journal.c:376 ocfs2_setattr+0x954/0x16c4 fs/ocfs2/file.c:1266 notify_change+0xa08/0xcd8 fs/attr.c:505 chmod_common+0x1dc/0x344 fs/open.c:582 do_fchmodat+0xcc/0x1d0 fs/open.c:621 __do_sys_fchmodat fs/open.c:634 [inline] __se_sys_fchmodat fs/open.c:631 [inline] __arm64_sys_fchmodat+0x7c/0x94 fs/open.c:631 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x430/0x794 fs/ocfs2/journal.c:374 ocfs2_setattr+0x954/0x16c4 fs/ocfs2/file.c:1266 notify_change+0xa08/0xcd8 fs/attr.c:505 chmod_common+0x1dc/0x344 fs/open.c:582 do_fchmodat+0xcc/0x1d0 fs/open.c:621 __do_sys_fchmodat fs/open.c:634 [inline] __se_sys_fchmodat fs/open.c:631 [inline] __arm64_sys_fchmodat+0x7c/0x94 fs/open.c:631 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (sb_internal#4){.+.+}-{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+0x2c4/0x794 fs/ocfs2/journal.c:372 ocfs2_setattr+0x954/0x16c4 fs/ocfs2/file.c:1266 notify_change+0xa08/0xcd8 fs/attr.c:505 chmod_common+0x1dc/0x344 fs/open.c:582 do_fchmodat+0xcc/0x1d0 fs/open.c:621 __do_sys_fchmodat fs/open.c:634 [inline] __se_sys_fchmodat fs/open.c:631 [inline] __arm64_sys_fchmodat+0x7c/0x94 fs/open.c:631 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #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+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x228/0x858 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x314/0x1b84 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1840/0x2e98 fs/ocfs2/namei.c:1568 vfs_rename+0x954/0xdcc fs/namei.c:4832 do_renameat2+0x74c/0xcdc fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 8 locks held by syz.9.340/6671: #0: ffff0000f0eb2460 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f0eb2748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: lock_rename fs/namei.c:3016 [inline] #1: ffff0000f0eb2748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: do_renameat2+0x30c/0xcdc fs/namei.c:4924 #2: ffff0000ef54c2c8 (&sb->s_type->i_mutex_key#36/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #2: ffff0000ef54c2c8 (&sb->s_type->i_mutex_key#36/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff0000ef54c2c8 (&sb->s_type->i_mutex_key#36/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3017 [inline] #2: ffff0000ef54c2c8 (&sb->s_type->i_mutex_key#36/1){+.+.}-{3:3}, at: do_renameat2+0x388/0xcdc fs/namei.c:4924 #3: ffff0000ef54a648 (&sb->s_type->i_mutex_key#37/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff0000ef54a648 (&sb->s_type->i_mutex_key#37/5){+.+.}-{3:3}, at: do_renameat2+0x3bc/0xcdc fs/namei.c:4924 #4: ffff0000ef54b488 (&sb->s_type->i_mutex_key#38/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #4: ffff0000ef54b488 (&sb->s_type->i_mutex_key#38/2){+.+.}-{3:3}, at: vfs_rename+0x60c/0xdcc fs/namei.c:4795 #5: ffff0000f0eb2650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_rename+0x14d8/0x2e98 fs/ocfs2/namei.c:1488 #6: ffff0000e7c850e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x430/0x794 fs/ocfs2/journal.c:374 #7: ffff0000e8742990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xecc/0x11a4 fs/jbd2/transaction.c:462 stack backtrace: CPU: 0 PID: 6671 Comm: syz.9.340 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2011 check_noncircular+0x240/0x2d4 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+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x228/0x858 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x314/0x1b84 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1840/0x2e98 fs/ocfs2/namei.c:1568 vfs_rename+0x954/0xdcc fs/namei.c:4832 do_renameat2+0x74c/0xcdc fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584