ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.242/5194 is trying to acquire lock: ffff0000c66b8660 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb4/0x2d8 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff0000c66b86f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa8/0x2d8 fs/ocfs2/refcounttree.c:931 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_mknod+0xc7c/0x1f18 fs/ocfs2/namei.c:361 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 -> #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_mknod+0xc7c/0x1f18 fs/ocfs2/namei.c:361 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 -> #1 (sb_internal#3){.+.+}-{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/0x6c4 fs/ocfs2/journal.c:372 ocfs2_write_begin_nolock+0x2078/0x3ab4 fs/ocfs2/aops.c:1770 ocfs2_dio_wr_get_block+0x75c/0x14e0 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:665 [inline] do_direct_IO fs/direct-io.c:953 [inline] __blockdev_direct_IO+0x112c/0x318c fs/direct-io.c:1266 ocfs2_direct_IO+0x208/0x280 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x31c/0x620 mm/filemap.c:3770 __generic_file_write_iter+0x1bc/0x37c mm/filemap.c:3930 ocfs2_file_write_iter+0x1300/0x1bf4 fs/ocfs2/file.c:2469 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x530/0x91c fs/read_write.c:861 vfs_iter_write+0x88/0xac fs/read_write.c:902 iter_file_splice_write+0x500/0xa18 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe4/0x134 fs/splice.c:950 splice_direct_to_actor+0x3b4/0x978 fs/splice.c:896 do_splice_direct+0x158/0x244 fs/splice.c:1002 do_sendfile+0x458/0xc88 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __arm64_sys_sendfile64+0x130/0x360 fs/read_write.c:1309 __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_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb4/0x2d8 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xce8/0x149c fs/ocfs2/file.c:517 ocfs2_setattr+0x1234/0x18d4 fs/ocfs2/file.c:1212 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x178/0x1f0 fs/open.c:65 handle_truncate fs/namei.c:3285 [inline] do_open fs/namei.c:3630 [inline] path_openat+0x20d0/0x2680 fs/namei.c:3783 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 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.4.242/5194: #0: ffff0000df5cc460 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000c66b89c8 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0000c66b89c8 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: do_truncate+0x164/0x1f0 fs/open.c:63 #2: ffff0000c66b86f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa8/0x2d8 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 0 PID: 5194 Comm: syz.4.242 Not tainted 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_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb4/0x2d8 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xce8/0x149c fs/ocfs2/file.c:517 ocfs2_setattr+0x1234/0x18d4 fs/ocfs2/file.c:1212 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x178/0x1f0 fs/open.c:65 handle_truncate fs/namei.c:3285 [inline] do_open fs/namei.c:3630 [inline] path_openat+0x20d0/0x2680 fs/namei.c:3783 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