loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): orphan cleanup on readonly fs ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted ------------------------------------------------------ syz-executor188/6172 is trying to acquire lock: ffff0000dfe41e68 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x240 fs/quota/dquot.c:479 but task is already holding lock: ffff0000deb0e6d8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x7c0/0x104c fs/ext4/inode.c:4337 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}-{3:3}: down_read+0x50/0x6c kernel/locking/rwsem.c:1520 ext4_map_blocks+0x2ac/0x1884 fs/ext4/inode.c:574 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:863 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:919 ext4_quota_read+0x178/0x294 fs/ext4/super.c:7089 v2_read_header fs/quota/quota_v2.c:62 [inline] v2_read_file_info+0x134/0xb6c fs/quota/quota_v2.c:102 dquot_load_quota_sb+0x6f0/0xb1c fs/quota/dquot.c:2409 dquot_load_quota_inode+0x35c/0x5c0 fs/quota/dquot.c:2445 ext4_quota_enable fs/ext4/super.c:6967 [inline] ext4_enable_quotas+0x53c/0xab4 fs/ext4/super.c:6993 __ext4_remount fs/ext4/super.c:6591 [inline] ext4_reconfigure+0x14d4/0x2928 fs/ext4/super.c:6642 reconfigure_super+0x328/0x738 fs/super.c:956 vfs_fsconfig_locked fs/fsopen.c:254 [inline] __do_sys_fsconfig fs/fsopen.c:439 [inline] __se_sys_fsconfig fs/fsopen.c:314 [inline] __arm64_sys_fsconfig+0xa1c/0xd18 fs/fsopen.c:314 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x50/0x6c kernel/locking/rwsem.c:1520 v2_read_dquot+0x50/0x11c fs/quota/quota_v2.c:332 dquot_acquire+0x130/0x5c4 fs/quota/dquot.c:435 ext4_acquire_dquot+0x270/0x398 fs/ext4/super.c:6770 dqget+0x844/0xc48 fs/quota/dquot.c:914 __dquot_initialize+0x344/0xb54 fs/quota/dquot.c:1492 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1550 ext4_process_orphan+0x5c/0x2b8 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0x968/0x1140 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x644c/0x6a30 fs/ext4/super.c:5637 get_tree_bdev+0x360/0x54c fs/super.c:1303 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5668 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 dquot_commit+0x54/0x240 fs/quota/dquot.c:479 ext4_write_dquot+0x1b4/0x288 fs/ext4/super.c:6754 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6802 mark_dquot_dirty fs/quota/dquot.c:346 [inline] mark_all_dquot_dirty fs/quota/dquot.c:384 [inline] __dquot_free_space+0x7e0/0xb58 fs/quota/dquot.c:1907 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:6044 [inline] ext4_free_blocks+0x1a14/0x2904 fs/ext4/mballoc.c:6173 ext4_remove_blocks fs/ext4/extents.c:2545 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline] ext4_ext_remove_space+0x1cc0/0x42a8 fs/ext4/extents.c:2958 ext4_ext_truncate+0x168/0x210 fs/ext4/extents.c:4416 ext4_truncate+0x9c4/0x104c fs/ext4/inode.c:4342 ext4_evict_inode+0xc24/0x1254 fs/ext4/inode.c:286 evict+0x260/0x68c fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x734/0x818 fs/inode.c:1774 ext4_process_orphan+0x244/0x2b8 fs/ext4/orphan.c:360 ext4_orphan_cleanup+0x968/0x1140 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x644c/0x6a30 fs/ext4/super.c:5637 get_tree_bdev+0x360/0x54c fs/super.c:1303 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5668 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 other info that might help us debug this: Chain exists of: &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/2); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); lock(&dquot->dq_lock); *** DEADLOCK *** 4 locks held by syz-executor188/6172: #0: ffff0000cc1e80e0 (&type->s_umount_key#25/1){+.+.}-{3:3}, at: alloc_super+0x1b4/0x824 fs/super.c:228 #1: ffff0000cc1e8650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1477 [inline] #1: ffff0000cc1e8650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1599 [inline] #1: ffff0000cc1e8650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x3e4/0x1254 fs/ext4/inode.c:240 #2: ffff0000deb0e6d8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x7c0/0x104c fs/ext4/inode.c:4337 #3: ffff80001606fae8 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:326 stack backtrace: CPU: 0 PID: 6172 Comm: syz-executor188 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 dquot_commit+0x54/0x240 fs/quota/dquot.c:479 ext4_write_dquot+0x1b4/0x288 fs/ext4/super.c:6754 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6802 mark_dquot_dirty fs/quota/dquot.c:346 [inline] mark_all_dquot_dirty fs/quota/dquot.c:384 [inline] __dquot_free_space+0x7e0/0xb58 fs/quota/dquot.c:1907 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:6044 [inline] ext4_free_blocks+0x1a14/0x2904 fs/ext4/mballoc.c:6173 ext4_remove_blocks fs/ext4/extents.c:2545 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline] ext4_ext_remove_space+0x1cc0/0x42a8 fs/ext4/extents.c:2958 ext4_ext_truncate+0x168/0x210 fs/ext4/extents.c:4416 ext4_truncate+0x9c4/0x104c fs/ext4/inode.c:4342 ext4_evict_inode+0xc24/0x1254 fs/ext4/inode.c:286 evict+0x260/0x68c fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x734/0x818 fs/inode.c:1774 ext4_process_orphan+0x244/0x2b8 fs/ext4/orphan.c:360 ext4_orphan_cleanup+0x968/0x1140 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x644c/0x6a30 fs/ext4/super.c:5637 get_tree_bdev+0x360/0x54c fs/super.c:1303 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5668 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 EXT4-fs (loop0): 1 orphan inode deleted FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 6172 Comm: syz-executor188 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:52 [inline] should_fail_ex+0x3f8/0x5c4 lib/fault-inject.c:153 __should_failslab+0xc8/0x128 mm/failslab.c:44 should_failslab+0x10/0x28 mm/slab_common.c:1462 slab_pre_alloc_hook mm/slab.h:730 [inline] slab_alloc_node mm/slub.c:3434 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x80/0x434 mm/slub.c:3476 ext4_es_alloc_extent fs/ext4/extents_status.c:456 [inline] __es_insert_extent+0x570/0x1270 fs/ext4/extents_status.c:794 ext4_es_insert_extent+0x2f0/0x27ac fs/ext4/extents_status.c:852 ext4_map_blocks+0x478/0x1884 fs/ext4/inode.c:598 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:863 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:919 ext4_quota_read+0x178/0x294 fs/ext4/super.c:7089 v2_read_header fs/quota/quota_v2.c:62 [inline] v2_check_quota_file+0xe8/0x368 fs/quota/quota_v2.c:81 dquot_load_quota_sb+0x5b0/0xb1c fs/quota/dquot.c:2402 dquot_load_quota_inode+0x35c/0x5c0 fs/quota/dquot.c:2445 ext4_quota_enable fs/ext4/super.c:6967 [inline] ext4_enable_quotas+0x53c/0xab4 fs/ext4/super.c:6993 __ext4_remount fs/ext4/super.c:6591 [inline] ext4_reconfigure+0x14d4/0x2928 fs/ext4/super.c:6642 reconfigure_super+0x328/0x738 fs/super.c:956 vfs_fsconfig_locked fs/fsopen.c:254 [inline] __do_sys_fsconfig fs/fsopen.c:439 [inline] __se_sys_fsconfig fs/fsopen.c:314 [inline] __arm64_sys_fsconfig+0xa1c/0xd18 fs/fsopen.c:314 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 EXT4-fs (loop0): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback.