====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.278/8010 is trying to acquire lock: ffff0000d6dbc610 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_remove_btree_range+0x67c/0x11cc fs/ocfs2/alloc.c:5760 but task is already holding lock: ffff0000f676a640 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] ffff0000f676a640 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_btree_range+0x524/0x11cc fs/ocfs2/alloc.c:5750 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:980 [inline] ocfs2_xattr_set+0x8a8/0xe9c fs/ocfs2/xattr.c:3622 ocfs2_xattr_trusted_set+0x4c/0x64 fs/ocfs2/xattr.c:7336 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:200 __vfs_setxattr_noperm+0x120/0x5c4 fs/xattr.c:234 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:295 vfs_setxattr+0x158/0x2ac fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline] ovl_make_workdir fs/overlayfs/super.c:725 [inline] ovl_get_workdir+0x9d4/0x1270 fs/overlayfs/super.c:837 ovl_fill_super+0x10d8/0x3118 fs/overlayfs/super.c:1468 vfs_get_super fs/super.c:1324 [inline] get_tree_nodev+0xb4/0x144 fs/super.c:1343 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:708 vfs_get_tree+0x90/0x28c fs/super.c:1751 fc_mount fs/namespace.c:1208 [inline] do_new_mount_fc fs/namespace.c:3651 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3727 path_mount+0x5b4/0xdfc fs/namespace.c:4037 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount fs/namespace.c:4215 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4215 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1590 ocfs2_xattr_set_handle+0x2a8/0x5e4 fs/ocfs2/xattr.c:3501 ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7307 ocfs2_mknod+0x106c/0x1cf0 fs/ocfs2/namei.c:422 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4131 do_filp_open+0x18c/0x36c fs/namei.c:4161 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x630/0x3b9c fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x368/0x810 fs/ocfs2/suballoc.c:984 ocfs2_mknod+0xbd8/0x1cf0 fs/ocfs2/namei.c:350 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4131 do_filp_open+0x18c/0x36c fs/namei.c:4161 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x630/0x3b9c fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x368/0x810 fs/ocfs2/suballoc.c:984 ocfs2_mknod+0xbd8/0x1cf0 fs/ocfs2/namei.c:350 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4131 do_filp_open+0x18c/0x36c fs/namei.c:4161 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (sb_internal#3){.+.+}-{0:0}: 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+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 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.h:1916 [inline] sb_start_intwrite include/linux/fs.h:2099 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_remove_btree_range+0x67c/0x11cc fs/ocfs2/alloc.c:5760 ocfs2_remove_inode_range+0xbc0/0x2174 fs/ocfs2/file.c:1907 ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4534 [inline] ocfs2_reflink_remap_blocks+0x950/0x14b0 fs/ocfs2/refcounttree.c:4681 ocfs2_remap_file_range+0x3fc/0x638 fs/ocfs2/file.c:2740 vfs_copy_file_range+0xbc4/0x10f8 fs/read_write.c:1598 __do_sys_copy_file_range fs/read_write.c:1681 [inline] __se_sys_copy_file_range fs/read_write.c:1648 [inline] __arm64_sys_copy_file_range+0x308/0x5d4 fs/read_write.c:1648 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: sb_internal#3 --> &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]); rlock(sb_internal#3); *** DEADLOCK *** 7 locks held by syz.0.278/8010: #0: ffff0000d6dbc420 (sb_writers#15){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3111 [inline] #0: ffff0000d6dbc420 (sb_writers#15){.+.+}-{0:0}, at: vfs_copy_file_range+0x868/0x10f8 fs/read_write.c:1586 #1: ffff0000f66289c0 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff0000f66289c0 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: lock_two_nondirectories+0xc4/0x150 fs/inode.c:1232 #2: ffff0000f81709c0 (&sb->s_type->i_mutex_key#25/4){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline] #2: ffff0000f81709c0 (&sb->s_type->i_mutex_key#25/4){+.+.}-{4:4}, at: lock_two_nondirectories+0xf0/0x150 fs/inode.c:1234 #3: ffff0000f8170660 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_remap_file_range+0x344/0x638 fs/ocfs2/file.c:2730 #4: ffff0000f6628660 (&ocfs2_file_ip_alloc_sem_key/1){+.+.}-{4:4}, at: ocfs2_remap_file_range+0x35c/0x638 fs/ocfs2/file.c:2732 #5: ffff0000d0555098 (&new->rf_sem){+.+.}-{4:4}, at: __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline] #5: ffff0000d0555098 (&new->rf_sem){+.+.}-{4:4}, at: ocfs2_lock_refcount_tree+0x188/0x924 fs/ocfs2/refcounttree.c:463 #6: ffff0000f676a640 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #6: ffff0000f676a640 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_btree_range+0x524/0x11cc fs/ocfs2/alloc.c:5750 stack backtrace: CPU: 0 UID: 0 PID: 8010 Comm: syz.0.278 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043 check_noncircular+0x154/0x174 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+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 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.h:1916 [inline] sb_start_intwrite include/linux/fs.h:2099 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_remove_btree_range+0x67c/0x11cc fs/ocfs2/alloc.c:5760 ocfs2_remove_inode_range+0xbc0/0x2174 fs/ocfs2/file.c:1907 ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4534 [inline] ocfs2_reflink_remap_blocks+0x950/0x14b0 fs/ocfs2/refcounttree.c:4681 ocfs2_remap_file_range+0x3fc/0x638 fs/ocfs2/file.c:2740 vfs_copy_file_range+0xbc4/0x10f8 fs/read_write.c:1598 __do_sys_copy_file_range fs/read_write.c:1681 [inline] __se_sys_copy_file_range fs/read_write.c:1648 [inline] __arm64_sys_copy_file_range+0x308/0x5d4 fs/read_write.c:1648 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596