====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc2-syzkaller-gc72692105976 #0 Not tainted ------------------------------------------------------ syz.5.246/7765 is trying to acquire lock: ffff0000e7f06610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_write_begin_inline fs/ocfs2/aops.c:1458 [inline] ffff0000e7f06610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline] ffff0000e7f06610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_write_begin_nolock+0xa04/0x3e90 fs/ocfs2/aops.c:1648 but task is already holding lock: ffff0000f80a22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x178/0x38c fs/ocfs2/aops.c:1880 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xb4/0x2f0 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x670/0x1448 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x410/0x4b4 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x230/0x374 fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x7a0/0xa24 fs/posix_acl.c:1133 do_set_acl+0xc8/0x1ac fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x2e4/0x3fc fs/xattr.c:665 path_setxattrat+0x374/0x420 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __arm64_sys_setxattr+0xc0/0xdc fs/xattr.c:743 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1524 ocfs2_xattr_get+0x104/0x28c fs/ocfs2/xattr.c:1338 ocfs2_xattr_security_get+0x40/0x54 fs/ocfs2/xattr.c:7231 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:423 smk_fetch+0xc8/0x150 security/smack/smack_lsm.c:290 smack_d_instantiate+0x594/0x880 security/smack/smack_lsm.c:3607 security_d_instantiate+0x100/0x204 security/security.c:4079 d_instantiate+0x5c/0xa0 fs/dcache.c:1936 ocfs2_mknod+0x1998/0x2438 fs/ocfs2/namei.c:450 ocfs2_mkdir+0x194/0x4d4 fs/ocfs2/namei.c:656 vfs_mkdir+0x288/0x42c fs/namei.c:4324 do_mkdirat+0x25c/0x5ec fs/namei.c:4357 __do_sys_mkdirat fs/namei.c:4374 [inline] __se_sys_mkdirat fs/namei.c:4372 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4372 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0xee0/0x1170 fs/jbd2/transaction.c:444 jbd2__journal_start+0x298/0x544 fs/jbd2/transaction.c:501 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3d0/0x71c fs/ocfs2/journal.c:352 ocfs2_modify_bh+0xe4/0x484 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1220/0x15bc fs/ocfs2/quota_local.c:771 dquot_load_quota_sb+0x6e4/0xb24 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:930 ocfs2_fill_super+0x4f34/0x60fc fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636 get_tree_bdev+0x2c/0x3c fs/super.c:1659 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x278/0x900 fs/namespace.c:3879 path_mount+0x590/0xe04 fs/namespace.c:4206 do_mount fs/namespace.c:4219 [inline] __do_sys_mount fs/namespace.c:4430 [inline] __se_sys_mount fs/namespace.c:4407 [inline] __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4407 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3c4/0x71c fs/ocfs2/journal.c:350 ocfs2_modify_bh+0xe4/0x484 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1220/0x15bc fs/ocfs2/quota_local.c:771 dquot_load_quota_sb+0x6e4/0xb24 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:930 ocfs2_fill_super+0x4f34/0x60fc fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636 get_tree_bdev+0x2c/0x3c fs/super.c:1659 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x278/0x900 fs/namespace.c:3879 path_mount+0x590/0xe04 fs/namespace.c:4206 do_mount fs/namespace.c:4219 [inline] __do_sys_mount fs/namespace.c:4430 [inline] __se_sys_mount fs/namespace.c:4407 [inline] __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4407 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (sb_internal#4){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x17b8/0x32c4 kernel/locking/lockdep.c:5235 lock_acquire+0x150/0x2e8 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x244/0x71c fs/ocfs2/journal.c:348 ocfs2_write_begin_inline fs/ocfs2/aops.c:1458 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline] ocfs2_write_begin_nolock+0xa04/0x3e90 fs/ocfs2/aops.c:1648 ocfs2_write_begin+0x1ac/0x38c fs/ocfs2/aops.c:1882 generic_perform_write+0x280/0x894 mm/filemap.c:4102 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4219 ocfs2_file_write_iter+0x161c/0x1f3c fs/ocfs2/file.c:2469 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x704/0xa9c fs/read_write.c:684 ksys_write+0x15c/0x26c fs/read_write.c:736 __do_sys_write fs/read_write.c:747 [inline] __se_sys_write fs/read_write.c:744 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:744 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: sb_internal#4 --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); rlock(sb_internal#4); *** DEADLOCK *** 4 locks held by syz.5.246/7765: #0: ffff0000d1afcb78 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x20c/0x2a0 fs/file.c:1213 #1: ffff0000e7f06420 (sb_writers#26){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #1: ffff0000e7f06420 (sb_writers#26){.+.+}-{0:0}, at: vfs_write+0x248/0xa9c fs/read_write.c:680 #2: ffff0000f80a2640 (&sb->s_type->i_mutex_key#38){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #2: ffff0000f80a2640 (&sb->s_type->i_mutex_key#38){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x3a4/0x1f3c fs/ocfs2/file.c:2399 #3: ffff0000f80a22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x178/0x38c fs/ocfs2/aops.c:1880 stack backtrace: CPU: 0 UID: 0 PID: 7765 Comm: syz.5.246 Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x1028 lib/dump_stack.c:129 print_circular_bug+0x32c/0x334 kernel/locking/lockdep.c:2079 check_noncircular+0x15c/0x178 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x17b8/0x32c4 kernel/locking/lockdep.c:5235 lock_acquire+0x150/0x2e8 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x244/0x71c fs/ocfs2/journal.c:348 ocfs2_write_begin_inline fs/ocfs2/aops.c:1458 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline] ocfs2_write_begin_nolock+0xa04/0x3e90 fs/ocfs2/aops.c:1648 ocfs2_write_begin+0x1ac/0x38c fs/ocfs2/aops.c:1882 generic_perform_write+0x280/0x894 mm/filemap.c:4102 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4219 ocfs2_file_write_iter+0x161c/0x1f3c fs/ocfs2/file.c:2469 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x704/0xa9c fs/read_write.c:684 ksys_write+0x15c/0x26c fs/read_write.c:736 __do_sys_write fs/read_write.c:747 [inline] __se_sys_write fs/read_write.c:744 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:744 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600