====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.305/5954 is trying to acquire lock: ffff0000e2321538 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x264/0x61c fs/ocfs2/acl.c:365 but task is already holding lock: ffff0000f51cc0e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x374/0x6cc fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&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_mknod+0xd1c/0x2110 fs/ocfs2/namei.c:361 ocfs2_create+0x19c/0x4f8 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3490 [inline] open_last_lookups fs/namei.c:3558 [inline] path_openat+0xe18/0x26bc fs/namei.c:3788 do_filp_open+0x194/0x384 fs/namei.c:3818 do_sys_openat2+0x134/0x3f4 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 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 -> #2 (sb_internal#4){.+.+}-{0:0}: 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_orphan_for_truncate fs/ocfs2/file.c:392 [inline] ocfs2_truncate_file+0x60c/0x14f8 fs/ocfs2/file.c:496 ocfs2_setattr+0x1288/0x1930 fs/ocfs2/file.c:1212 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x188/0x20c fs/open.c:65 do_coredump+0x196c/0x1c68 fs/coredump.c:801 get_signal+0xdec/0x1304 kernel/signal.c:2857 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x33c/0x2aa4 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_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 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 (&oi->ip_alloc_sem){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb4/0x2e4 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xd24/0x14f8 fs/ocfs2/file.c:517 ocfs2_setattr+0x1288/0x1930 fs/ocfs2/file.c:1212 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x188/0x20c fs/open.c:65 do_coredump+0x196c/0x1c68 fs/coredump.c:801 get_signal+0xdec/0x1304 kernel/signal.c:2857 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x33c/0x2aa4 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_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 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 (&oi->ip_xattr_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+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x264/0x61c fs/ocfs2/acl.c:365 ocfs2_mknod+0x129c/0x2110 fs/ocfs2/namei.c:410 ocfs2_create+0x19c/0x4f8 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3490 [inline] open_last_lookups fs/namei.c:3558 [inline] path_openat+0xe18/0x26bc fs/namei.c:3788 do_filp_open+0x194/0x384 fs/namei.c:3818 do_sys_openat2+0x134/0x3f4 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 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: &oi->ip_xattr_sem --> sb_internal#4 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#4); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.5.305/5954: #0: ffff0000dca7a460 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402 #1: ffff0000e2321808 (&type->i_mutex_dir_key#14){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0000e2321808 (&type->i_mutex_dir_key#14){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline] #1: ffff0000e2321808 (&type->i_mutex_dir_key#14){++++}-{3:3}, at: path_openat+0x5f4/0x26bc fs/namei.c:3788 #2: ffff0000f5c72648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff0000f5c72648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x10c/0x3c80 fs/ocfs2/suballoc.c:782 #3: ffff0000f5c71808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #3: ffff0000f5c71808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x10c/0x3c80 fs/ocfs2/suballoc.c:782 #4: ffff0000f5c742c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #4: ffff0000f5c742c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0xe4/0x26c8 fs/ocfs2/localalloc.c:635 #5: ffff0000dca7a650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_mknod+0xd1c/0x2110 fs/ocfs2/namei.c:361 #6: ffff0000f51cc0e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x374/0x6cc fs/ocfs2/journal.c:374 #7: ffff0000e0330990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1020/0x1280 fs/jbd2/transaction.c:461 stack backtrace: CPU: 1 PID: 5954 Comm: syz.5.305 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x264/0x61c fs/ocfs2/acl.c:365 ocfs2_mknod+0x129c/0x2110 fs/ocfs2/namei.c:410 ocfs2_create+0x19c/0x4f8 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3490 [inline] open_last_lookups fs/namei.c:3558 [inline] path_openat+0xe18/0x26bc fs/namei.c:3788 do_filp_open+0x194/0x384 fs/namei.c:3818 do_sys_openat2+0x134/0x3f4 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 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