ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.1.148-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.93/4811 is trying to acquire lock: ffff0000fc85b120 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2693 but task is already holding lock: ffff0000fc85b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x32c/0xe98 fs/ocfs2/xattr.c:3587 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x258/0x5f0 fs/ocfs2/acl.c:365 ocfs2_mknod+0x1168/0x1f18 fs/ocfs2/namei.c:410 ocfs2_create+0x19c/0x4f0 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x112c/0x2680 fs/namei.c:3780 do_filp_open+0x174/0x344 fs/namei.c:3810 do_sys_openat2+0x128/0x3d8 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1345 __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 -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0xfe0/0x122c fs/jbd2/transaction.c:463 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:520 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:559 ocfs2_start_trans+0x380/0x6c4 fs/ocfs2/journal.c:376 ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1f0/0x93c fs/ocfs2/super.c:1882 ocfs2_put_super+0x108/0x390 fs/ocfs2/super.c:1609 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1182 __cleanup_mnt+0x20/0x30 fs/namespace.c:1189 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137 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+0x98/0x138 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 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x304 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x374/0x6c4 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1f0/0x93c fs/ocfs2/super.c:1882 ocfs2_put_super+0x108/0x390 fs/ocfs2/super.c:1609 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1182 __cleanup_mnt+0x20/0x30 fs/namespace.c:1189 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137 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+0x98/0x138 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 (sb_internal#3){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5376 [inline] lock_release+0x308/0x910 kernel/locking/lockdep.c:5682 up_write+0x48/0x5c0 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:763 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x94/0x188 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x3a1c/0x3ab4 fs/ocfs2/aops.c:1825 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 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ac/0x7c4 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x170/0x200 fs/read_write.c:706 __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 -> #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_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2693 ocfs2_xattr_set+0x340/0xe98 fs/ocfs2/xattr.c:3592 ocfs2_set_acl+0x3ec/0x4a0 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x174/0x240 fs/ocfs2/acl.c:285 set_posix_acl fs/posix_acl.c:1160 [inline] posix_acl_xattr_set+0x2f8/0x398 fs/posix_acl.c:1189 __vfs_removexattr+0x370/0x38c fs/xattr.c:479 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514 vfs_removexattr+0x80/0x190 fs/xattr.c:536 removexattr fs/xattr.c:878 [inline] path_removexattr+0x188/0x31c fs/xattr.c:892 __do_sys_removexattr fs/xattr.c:906 [inline] __se_sys_removexattr fs/xattr.c:903 [inline] __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:903 __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: Chain exists of: &oi->ip_alloc_sem --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 3 locks held by syz.0.93/4811: #0: ffff0000cac82460 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000fc85b488 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0000fc85b488 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: vfs_removexattr+0x6c/0x190 fs/xattr.c:535 #2: ffff0000fc85b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x32c/0xe98 fs/ocfs2/xattr.c:3587 stack backtrace: CPU: 1 PID: 4811 Comm: syz.0.93 Not tainted 6.1.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2693 ocfs2_xattr_set+0x340/0xe98 fs/ocfs2/xattr.c:3592 ocfs2_set_acl+0x3ec/0x4a0 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x174/0x240 fs/ocfs2/acl.c:285 set_posix_acl fs/posix_acl.c:1160 [inline] posix_acl_xattr_set+0x2f8/0x398 fs/posix_acl.c:1189 __vfs_removexattr+0x370/0x38c fs/xattr.c:479 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514 vfs_removexattr+0x80/0x190 fs/xattr.c:536 removexattr fs/xattr.c:878 [inline] path_removexattr+0x188/0x31c fs/xattr.c:892 __do_sys_removexattr fs/xattr.c:906 [inline] __se_sys_removexattr fs/xattr.c:903 [inline] __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:903 __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