====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-g573067a5a685 #0 Not tainted ------------------------------------------------------ syz.5.441/8540 is trying to acquire lock: ffff0000de15a428 (&dquot->dq_lock){+.+.}-{4:4}, at: wait_on_dquot fs/quota/dquot.c:354 [inline] ffff0000de15a428 (&dquot->dq_lock){+.+.}-{4:4}, at: dqget+0x5f0/0xcec fs/quota/dquot.c:972 but task is already holding lock: ffff0000de2dbc38 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0x8a8/0x173c fs/ext4/inode.c:5399 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&ei->xattr_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ext4_write_lock_xattr fs/ext4/xattr.h:154 [inline] ext4_xattr_set_handle+0x1dc/0x12d0 fs/ext4/xattr.c:2373 ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44 security_inode_init_security+0x73c/0x908 security/security.c:1847 ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x2ba8/0x37dc fs/ext4/ialloc.c:1324 ext4_create+0x234/0x480 fs/ext4/namei.c:2841 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x13e4/0x2b14 fs/namei.c:3984 do_filp_open+0x1e8/0x404 fs/namei.c:4014 do_sys_openat2+0x124/0x1b8 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1428 __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 -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0xf34/0x11c4 fs/jbd2/transaction.c:448 jbd2__journal_start+0x298/0x544 fs/jbd2/transaction.c:505 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:544 ocfs2_start_trans+0x3d0/0x71c fs/ocfs2/journal.c:352 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x840/0x4254 fs/ocfs2/suballoc.c:832 ocfs2_reserve_new_metadata_blocks+0x384/0x848 fs/ocfs2/suballoc.c:982 ocfs2_mknod+0xdc8/0x2438 fs/ocfs2/namei.c:347 ocfs2_create+0x194/0x4d4 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x13e4/0x2b14 fs/namei.c:3984 do_filp_open+0x1e8/0x404 fs/namei.c:4014 do_sys_openat2+0x124/0x1b8 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1428 __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_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x840/0x4254 fs/ocfs2/suballoc.c:832 ocfs2_reserve_new_metadata_blocks+0x384/0x848 fs/ocfs2/suballoc.c:982 ocfs2_mknod+0xdc8/0x2438 fs/ocfs2/namei.c:347 ocfs2_create+0x194/0x4d4 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x13e4/0x2b14 fs/namei.c:3984 do_filp_open+0x1e8/0x404 fs/namei.c:4014 do_sys_openat2+0x124/0x1b8 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1428 __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#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1725 [inline] sb_start_intwrite include/linux/fs.h:1908 [inline] ocfs2_start_trans+0x244/0x71c fs/ocfs2/journal.c:348 ocfs2_acquire_dquot+0x5c0/0xa90 fs/ocfs2/quota_global.c:855 dqget+0x660/0xcec fs/quota/dquot.c:977 dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820 quota_setquota+0x618/0x6f0 fs/quota/quota.c:310 do_quotactl+0x508/0x698 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __arm64_sys_quotactl+0x2c0/0xc9c fs/quota/quota.c:917 __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_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_create_local_dquot+0x1a0/0x1778 fs/ocfs2/quota_local.c:1231 ocfs2_acquire_dquot+0x6e4/0xa90 fs/ocfs2/quota_global.c:878 dqget+0x660/0xcec fs/quota/dquot.c:977 dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820 quota_setquota+0x618/0x6f0 fs/quota/quota.c:310 do_quotactl+0x508/0x698 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __arm64_sys_quotactl+0x2c0/0xc9c fs/quota/quota.c:917 __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 (&dquot->dq_lock){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x5f0/0xcec fs/quota/dquot.c:972 dquot_transfer+0x248/0x5c0 fs/quota/dquot.c:2140 ext4_setattr+0x8b8/0x173c fs/ext4/inode.c:5400 notify_change+0x9f0/0xca0 fs/attr.c:552 chown_common+0x438/0x700 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe0/0x158 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:861 __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: &dquot->dq_lock --> jbd2_handle --> &ei->xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&ei->xattr_sem); lock(jbd2_handle); lock(&ei->xattr_sem); lock(&dquot->dq_lock); *** DEADLOCK *** 3 locks held by syz.5.441/8540: #0: ffff0000d5388420 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:559 #1: ffff0000de2dbf68 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #1: ffff0000de2dbf68 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: chown_common+0x348/0x700 fs/open.c:768 #2: ffff0000de2dbc38 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0x8a8/0x173c fs/ext4/inode.c:5399 stack backtrace: CPU: 1 UID: 0 PID: 8540 Comm: syz.5.441 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2074 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x5f0/0xcec fs/quota/dquot.c:972 dquot_transfer+0x248/0x5c0 fs/quota/dquot.c:2140 ext4_setattr+0x8b8/0x173c fs/ext4/inode.c:5400 notify_change+0x9f0/0xca0 fs/attr.c:552 chown_common+0x438/0x700 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe0/0x158 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:861 __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