====================================================== WARNING: possible circular locking dependency detected 6.1.118-syzkaller #0 Not tainted ------------------------------------------------------ syz.3.48/4570 is trying to acquire lock: ffff0000f35567a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x240 fs/quota/dquot.c:507 but task is already holding lock: ffff0000f35c48c0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_truncate+0x7e0/0x1178 fs/ext4/inode.c:4283 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&ei->i_data_sem){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ext4_truncate+0x7e0/0x1178 fs/ext4/inode.c:4283 ext4_setattr+0xda0/0x14e8 fs/ext4/inode.c:5601 notify_change+0xb58/0xe1c fs/attr.c:499 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __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+0x58/0x168 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 -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1140/0x13ac fs/jbd2/transaction.c:463 jbd2__journal_start+0x298/0x544 fs/jbd2/transaction.c:520 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:559 ocfs2_start_trans+0x3e8/0x73c fs/ocfs2/journal.c:354 ocfs2_mknod+0xe64/0x2560 fs/ocfs2/namei.c:359 ocfs2_create+0x1a8/0x560 fs/ocfs2/namei.c:672 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0xeac/0x2548 fs/namei.c:3780 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 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+0x1f0/0x240 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+0x58/0x168 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 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x308 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3dc/0x73c fs/ocfs2/journal.c:352 ocfs2_mknod+0xe64/0x2560 fs/ocfs2/namei.c:359 ocfs2_create+0x1a8/0x560 fs/ocfs2/namei.c:672 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0xeac/0x2548 fs/namei.c:3780 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 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+0x1f0/0x240 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+0x58/0x168 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 (sb_internal#2){.+.+}-{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+0x260/0x73c fs/ocfs2/journal.c:350 ocfs2_acquire_dquot+0x3d8/0xb1c fs/ocfs2/quota_global.c:843 dqget+0x660/0xcec fs/quota/dquot.c:986 __dquot_initialize+0x344/0xc04 fs/quota/dquot.c:1515 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1577 ocfs2_get_init_inode+0x14c/0x1b8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ac/0x2560 fs/ocfs2/namei.c:308 ocfs2_mkdir+0x1a8/0x560 fs/ocfs2/namei.c:655 vfs_mkdir+0x334/0x4e4 fs/namei.c:4106 do_mkdirat+0x220/0x510 fs/namei.c:4131 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4144 __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+0x58/0x168 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 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x194/0x1654 fs/ocfs2/quota_local.c:1231 ocfs2_acquire_dquot+0x720/0xb1c fs/ocfs2/quota_global.c:866 dqget+0x660/0xcec fs/quota/dquot.c:986 __dquot_initialize+0x344/0xc04 fs/quota/dquot.c:1515 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1577 ocfs2_get_init_inode+0x14c/0x1b8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ac/0x2560 fs/ocfs2/namei.c:308 ocfs2_mkdir+0x1a8/0x560 fs/ocfs2/namei.c:655 vfs_mkdir+0x334/0x4e4 fs/namei.c:4106 do_mkdirat+0x220/0x510 fs/namei.c:4131 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4144 __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+0x58/0x168 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 (&dquot->dq_lock){+.+.}-{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+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 dquot_commit+0x54/0x240 fs/quota/dquot.c:507 ext4_write_dquot+0x1b4/0x314 fs/ext4/super.c:6777 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6837 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412 __dquot_free_space+0x840/0xce4 fs/quota/dquot.c:1940 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6143 [inline] ext4_free_blocks+0x1b14/0x2b64 fs/ext4/mballoc.c:6273 ext4_remove_blocks fs/ext4/extents.c:2507 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline] ext4_ext_remove_space+0x1ad0/0x4544 fs/ext4/extents.c:2939 ext4_ext_truncate+0x168/0x210 fs/ext4/extents.c:4469 ext4_truncate+0xa08/0x1178 fs/ext4/inode.c:4288 ext4_evict_inode+0xc3c/0x12cc fs/ext4/inode.c:286 evict+0x418/0x894 fs/inode.c:701 iput_final fs/inode.c:1830 [inline] iput+0x7c0/0x8a4 fs/inode.c:1856 dentry_unlink_inode+0x37c/0x4bc fs/dcache.c:405 __dentry_kill+0x324/0x5e4 fs/dcache.c:611 dentry_kill+0xc8/0x250 dput+0x218/0x454 fs/dcache.c:918 do_renameat2+0x9f8/0xe64 fs/namei.c:5029 __do_sys_renameat2 fs/namei.c:5060 [inline] __se_sys_renameat2 fs/namei.c:5057 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057 __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+0x58/0x168 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: &dquot->dq_lock --> jbd2_handle --> &ei->i_data_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem); lock(jbd2_handle); lock(&ei->i_data_sem); lock(&dquot->dq_lock); *** DEADLOCK *** 5 locks held by syz.3.48/4570: #0: ffff0000de074460 (sb_writers#3){++++}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000f35c1810 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_renameat2+0x538/0xe64 fs/namei.c:4966 #2: ffff0000de074650 (sb_internal){++++}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #2: ffff0000de074650 (sb_internal){++++}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #2: ffff0000de074650 (sb_internal){++++}-{0:0}, at: ext4_evict_inode+0x408/0x12cc fs/ext4/inode.c:240 #3: ffff0000f35c48c0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_truncate+0x7e0/0x1178 fs/ext4/inode.c:4283 #4: ffff800015cd8a48 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:349 stack backtrace: CPU: 1 PID: 4570 Comm: syz.3.48 Not tainted 6.1.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2048 check_noncircular+0x2cc/0x378 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+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 dquot_commit+0x54/0x240 fs/quota/dquot.c:507 ext4_write_dquot+0x1b4/0x314 fs/ext4/super.c:6777 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6837 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412 __dquot_free_space+0x840/0xce4 fs/quota/dquot.c:1940 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6143 [inline] ext4_free_blocks+0x1b14/0x2b64 fs/ext4/mballoc.c:6273 ext4_remove_blocks fs/ext4/extents.c:2507 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline] ext4_ext_remove_space+0x1ad0/0x4544 fs/ext4/extents.c:2939 ext4_ext_truncate+0x168/0x210 fs/ext4/extents.c:4469 ext4_truncate+0xa08/0x1178 fs/ext4/inode.c:4288 ext4_evict_inode+0xc3c/0x12cc fs/ext4/inode.c:286 evict+0x418/0x894 fs/inode.c:701 iput_final fs/inode.c:1830 [inline] iput+0x7c0/0x8a4 fs/inode.c:1856 dentry_unlink_inode+0x37c/0x4bc fs/dcache.c:405 __dentry_kill+0x324/0x5e4 fs/dcache.c:611 dentry_kill+0xc8/0x250 dput+0x218/0x454 fs/dcache.c:918 do_renameat2+0x9f8/0xe64 fs/namei.c:5029 __do_sys_renameat2 fs/namei.c:5060 [inline] __se_sys_renameat2 fs/namei.c:5057 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057 __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+0x58/0x168 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 EXT4-fs error (device loop3): ext4_do_update_inode:5224: inode #15: comm syz.3.48: corrupted inode contents EXT4-fs error (device loop3): ext4_dirty_inode:6089: inode #15: comm syz.3.48: mark_inode_dirty error EXT4-fs error (device loop3): ext4_do_update_inode:5224: inode #15: comm syz.3.48: corrupted inode contents EXT4-fs error (device loop3): __ext4_ext_dirty:202: inode #15: comm syz.3.48: mark_inode_dirty error EXT4-fs error (device loop3): ext4_do_update_inode:5224: inode #15: comm syz.3.48: corrupted inode contents EXT4-fs error (device loop3): __ext4_ext_dirty:202: inode #15: comm syz.3.48: mark_inode_dirty error EXT4-fs error (device loop3): ext4_do_update_inode:5224: inode #15: comm syz.3.48: corrupted inode contents EXT4-fs error (device loop3): ext4_truncate:4311: inode #15: comm syz.3.48: mark_inode_dirty error EXT4-fs error (device loop3): ext4_evict_inode:290: comm syz.3.48: couldn't truncate inode 15 (err -117)