====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc2-syzkaller-gc72692105976 #0 Not tainted ------------------------------------------------------ syz.3.81/6998 is trying to acquire lock: ffff0000f1cd86f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_get+0x104/0x28c fs/ocfs2/xattr.c:1338 but task is already holding lock: ffff0000cd220950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xeb8/0x1170 fs/jbd2/transaction.c:442 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (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 -> #3 (&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 -> #2 (sb_internal#4){.+.+}-{0:0}: 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_xattr_set+0xdac/0x1448 fs/ocfs2/xattr.c:3643 ocfs2_xattr_security_set+0x4c/0x64 fs/ocfs2/xattr.c:7241 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:200 __vfs_setxattr_noperm+0x110/0x578 fs/xattr.c:234 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:295 vfs_setxattr+0x1a8/0x344 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x268/0x3fc fs/xattr.c:665 path_setxattrat+0x374/0x420 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __arm64_sys_lsetxattr+0xc0/0xdc fs/xattr.c:750 __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 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ocfs2_reserve_local_alloc_bits+0x108/0x24f8 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1166 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1227 ocfs2_init_xattr_set_ctxt+0x428/0x978 fs/ocfs2/xattr.c:3286 ocfs2_xattr_set+0xbe0/0x1448 fs/ocfs2/xattr.c:3634 ocfs2_xattr_trusted_set+0x4c/0x64 fs/ocfs2/xattr.c:7336 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:200 __vfs_setxattr_noperm+0x110/0x578 fs/xattr.c:234 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:295 vfs_setxattr+0x1a8/0x344 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x268/0x3fc 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 -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: 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 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_create+0x194/0x4d4 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0x13ec/0x2b1c fs/namei.c:4001 do_filp_open+0x1e8/0x404 fs/namei.c:4031 do_sys_openat2+0x120/0x1b8 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __arm64_sys_openat+0x1f0/0x244 fs/open.c:1455 __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: &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); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.3.81/6998: #0: ffff0000cb6cc420 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:556 #1: ffff0000dda1ed80 (&type->i_mutex_dir_key#14){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff0000dda1ed80 (&type->i_mutex_dir_key#14){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3762 [inline] #1: ffff0000dda1ed80 (&type->i_mutex_dir_key#14){+.+.}-{4:4}, at: path_openat+0x684/0x2b1c fs/namei.c:4001 #2: ffff0000f31809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #2: ffff0000f31809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4254 fs/ocfs2/suballoc.c:786 #3: ffff0000f1eced80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #3: ffff0000f1eced80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4254 fs/ocfs2/suballoc.c:786 #4: ffff0000f3182640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #4: ffff0000f3182640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x108/0x24f8 fs/ocfs2/localalloc.c:636 #5: ffff0000cb6cc610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_mknod+0xe58/0x2438 fs/ocfs2/namei.c:361 #6: ffff0000d5f258e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3c4/0x71c fs/ocfs2/journal.c:350 #7: ffff0000cd220950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xeb8/0x1170 fs/jbd2/transaction.c:442 stack backtrace: CPU: 1 UID: 0 PID: 6998 Comm: syz.3.81 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 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_create+0x194/0x4d4 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0x13ec/0x2b1c fs/namei.c:4001 do_filp_open+0x1e8/0x404 fs/namei.c:4031 do_sys_openat2+0x120/0x1b8 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __arm64_sys_openat+0x1f0/0x244 fs/open.c:1455 __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