loop4: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,4) on (node local, slot 0) with writeback data mode. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc4-syzkaller-g7482bb149b9f #0 Not tainted ------------------------------------------------------ syz.4.1198/9980 is trying to acquire lock: ffff0000f6289538 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set_handle+0x2a8/0x5e4 fs/ocfs2/xattr.c:3501 but task is already holding lock: ffff0000d849a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (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_acl_set_mode+0x168/0x6c8 fs/ocfs2/acl.c:174 ocfs2_iop_set_acl+0x234/0x25c fs/ocfs2/acl.c:282 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x70c/0x974 fs/posix_acl.c:1133 do_set_acl+0xe0/0x1a8 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] file_setxattr+0x210/0x294 fs/xattr.c:646 path_setxattrat+0x2ac/0x320 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __arm64_sys_fsetxattr+0xc0/0xdc fs/xattr.c:758 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 ocfs2_acl_set_mode+0x168/0x6c8 fs/ocfs2/acl.c:174 ocfs2_iop_set_acl+0x234/0x25c fs/ocfs2/acl.c:282 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x70c/0x974 fs/posix_acl.c:1133 do_set_acl+0xe0/0x1a8 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] file_setxattr+0x210/0x294 fs/xattr.c:646 path_setxattrat+0x2ac/0x320 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __arm64_sys_fsetxattr+0xc0/0xdc fs/xattr.c:758 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (sb_internal#3){.+.+}-{0:0}: 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:1795 [inline] sb_start_intwrite include/linux/fs.h:1978 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_xattr_set+0xac4/0xe9c fs/ocfs2/xattr.c:3643 ocfs2_set_acl+0x574/0x628 fs/ocfs2/acl.c:254 ocfs2_acl_chmod+0x1c0/0x2f0 fs/ocfs2/acl.c:341 ocfs2_setattr+0xfc0/0x17a0 fs/ocfs2/file.c:1297 notify_change+0x9a4/0xc50 fs/attr.c:552 chmod_common+0x1f8/0x370 fs/open.c:649 do_fchmodat+0x114/0x224 fs/open.c:696 __do_sys_fchmodat fs/open.c:715 [inline] __se_sys_fchmodat fs/open.c:712 [inline] __arm64_sys_fchmodat+0x80/0x98 fs/open.c:712 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 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:419 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 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+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); lock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.4.1198/9980: #0: ffff0000f653e428 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557 #1: ffff0000f628a640 (&type->i_mutex_dir_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff0000f628a640 (&type->i_mutex_dir_key#9){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3813 [inline] #1: ffff0000f628a640 (&type->i_mutex_dir_key#9){+.+.}-{4:4}, at: path_openat+0x638/0x2c40 fs/namei.c:4052 #2: ffff0000f60a89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #2: ffff0000f60a89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #3: ffff0000f60ab480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #3: ffff0000f60ab480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #4: ffff0000f628b480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #4: ffff0000f628b480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #5: ffff0000f653e618 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xc50/0x1cf0 fs/ocfs2/namei.c:361 #6: ffff0000f3ea40e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 #7: ffff0000d849a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 stack backtrace: CPU: 1 UID: 0 PID: 9980 Comm: syz.4.1198 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (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:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 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:419 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 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+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600