====================================================== WARNING: possible circular locking dependency detected 6.1.147-syzkaller #0 Not tainted ------------------------------------------------------ syz.3.140/5179 is trying to acquire lock: ffff0000f52c5be0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x244/0x8e0 fs/ocfs2/extent_map.c:976 but task is already holding lock: ffff0000d9a40990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb8/0x122c fs/jbd2/transaction.c:461 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (jbd2_handle){++++}-{0:0}: jbd2_log_wait_commit+0x158/0x428 fs/jbd2/journal.c:694 ocfs2_try_to_free_truncate_log+0x2a8/0x2d8 fs/ocfs2/alloc.c:6143 ocfs2_write_begin_nolock+0x28a8/0x3ab4 fs/ocfs2/aops.c:1870 ocfs2_write_begin+0x1b4/0x30c fs/ocfs2/aops.c:1904 generic_perform_write+0x230/0x4b0 mm/filemap.c:3846 __generic_file_write_iter+0x168/0x37c mm/filemap.c:3974 ocfs2_file_write_iter+0x1300/0x1bf4 fs/ocfs2/file.c:2469 __kernel_write_iter+0x200/0x558 fs/read_write.c:517 dump_emit_page fs/coredump.c:950 [inline] dump_user_range+0x318/0x5e8 fs/coredump.c:977 elf_core_dump+0x27bc/0x2cc4 fs/binfmt_elf.c:2354 do_coredump+0x10c4/0x1c4c fs/coredump.c:824 get_signal+0xdec/0x1310 kernel/signal.c:2857 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x290/0x2b0c arch/arm64/kernel/signal.c:1134 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_da+0xb4/0x154 arch/arm64/kernel/entry-common.c:516 el0t_64_sync_handler+0x90/0xf0 arch/arm64/kernel/entry-common.c:658 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&oi->ip_alloc_sem){++++}-{3:3}: 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+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x244/0x8e0 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block+0xdc/0x454 fs/ocfs2/dir.c:508 ocfs2_dir_foreach_blk_el fs/ocfs2/dir.c:1842 [inline] ocfs2_dir_foreach_blk+0x224/0x1670 fs/ocfs2/dir.c:1928 ocfs2_dir_foreach+0x160/0x1b8 fs/ocfs2/dir.c:1938 ocfs2_empty_dir+0xf4/0x538 fs/ocfs2/dir.c:2156 ocfs2_rename+0x1aa8/0x2edc fs/ocfs2/namei.c:1499 vfs_rename+0x954/0xdcc fs/namei.c:4874 do_renameat2+0x738/0xa54 fs/namei.c:5027 __do_sys_renameat2 fs/namei.c:5060 [inline] __se_sys_renameat2 fs/namei.c:5057 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(jbd2_handle); lock(&oi->ip_alloc_sem); lock(jbd2_handle); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 10 locks held by syz.3.140/5179: #0: ffff0000d9676460 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000d9676748 (&type->s_vfs_rename_key#4){+.+.}-{3:3}, at: lock_rename fs/namei.c:3038 [inline] #1: ffff0000d9676748 (&type->s_vfs_rename_key#4){+.+.}-{3:3}, at: do_renameat2+0x2fc/0xa54 fs/namei.c:4966 #2: ffff0000e1f209c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff0000e1f209c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff0000e1f209c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3039 [inline] #2: ffff0000e1f209c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: do_renameat2+0x378/0xa54 fs/namei.c:4966 #3: ffff0000f52ab488 (&sb->s_type->i_mutex_key#29/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff0000f52ab488 (&sb->s_type->i_mutex_key#29/5){+.+.}-{3:3}, at: do_renameat2+0x3ac/0xa54 fs/namei.c:4966 #4: ffff0000f52ac2c8 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #4: ffff0000f52ac2c8 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: vfs_rename+0x60c/0xdcc fs/namei.c:4837 #5: ffff0000f52c5f48 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #5: ffff0000f52c5f48 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: vfs_rename+0x670/0xdcc fs/namei.c:4839 #6: ffff0000f52c09c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #6: ffff0000f52c09c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_lookup_lock_orphan_dir+0xd0/0x278 fs/ocfs2/namei.c:2116 #7: ffff0000d9676650 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_rename+0x14b4/0x2edc fs/ocfs2/namei.c:1488 #8: ffff0000f4fa68e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x374/0x6c4 fs/ocfs2/journal.c:374 #9: ffff0000d9a40990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb8/0x122c fs/jbd2/transaction.c:461 stack backtrace: CPU: 0 PID: 5179 Comm: syz.3.140 Not tainted 6.1.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x1c8/0x1f4 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+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:2048 check_noncircular+0x240/0x2d4 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+0x293c/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x244/0x8e0 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block+0xdc/0x454 fs/ocfs2/dir.c:508 ocfs2_dir_foreach_blk_el fs/ocfs2/dir.c:1842 [inline] ocfs2_dir_foreach_blk+0x224/0x1670 fs/ocfs2/dir.c:1928 ocfs2_dir_foreach+0x160/0x1b8 fs/ocfs2/dir.c:1938 ocfs2_empty_dir+0xf4/0x538 fs/ocfs2/dir.c:2156 ocfs2_rename+0x1aa8/0x2edc fs/ocfs2/namei.c:1499 vfs_rename+0x954/0xdcc fs/namei.c:4874 do_renameat2+0x738/0xa54 fs/namei.c:5027 __do_sys_renameat2 fs/namei.c:5060 [inline] __se_sys_renameat2 fs/namei.c:5057 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 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