loop4: detected capacity change from 0 to 512 ====================================================== WARNING: possible circular locking dependency detected 6.1.111-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.2704/12342 is trying to acquire lock: ffff888071b8dcd0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_map_blocks+0x379/0x1cb0 fs/ext4/inode.c:603 but task is already holding lock: ffff88806494a208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x9b/0x190 fs/quota/quota_v2.c:357 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&s->s_dquot.dqio_sem){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 v2_read_dquot+0x4a/0x100 fs/quota/quota_v2.c:335 dquot_acquire+0x188/0x680 fs/quota/dquot.c:463 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6796 dqget+0x762/0xe90 fs/quota/dquot.c:986 __dquot_initialize+0x45e/0xea0 fs/quota/dquot.c:1515 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb70/0x1400 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x83ff/0x8b50 fs/ext4/super.c:5664 get_tree_bdev+0x3fe/0x620 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&dquot->dq_lock){+.+.}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 dquot_commit+0x57/0x510 fs/quota/dquot.c:507 ext4_write_dquot+0x1fd/0x360 fs/ext4/super.c:6776 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x1e0/0x400 fs/quota/dquot.c:412 __dquot_alloc_space+0xb68/0x10e0 fs/quota/dquot.c:1750 dquot_alloc_space_nodirty include/linux/quotaops.h:300 [inline] dquot_alloc_space include/linux/quotaops.h:313 [inline] dquot_alloc_block include/linux/quotaops.h:337 [inline] ext4_mb_new_blocks+0x1302/0x4b80 fs/ext4/mballoc.c:5730 ext4_ext_map_blocks+0x1c1c/0x7ab0 fs/ext4/extents.c:4318 ext4_map_blocks+0xa2b/0x1cb0 fs/ext4/inode.c:678 ext4_alloc_file_blocks+0x3db/0xce0 fs/ext4/extents.c:4502 ext4_fallocate+0xd2b/0x2160 fs/ext4/extents.c:4789 vfs_fallocate+0x547/0x6b0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ei->i_data_sem/2){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x379/0x1cb0 fs/ext4/inode.c:603 ext4_getblk+0x1eb/0x7c0 fs/ext4/inode.c:889 ext4_bread+0x2a/0x170 fs/ext4/inode.c:945 ext4_quota_write+0x21e/0x570 fs/ext4/super.c:7170 write_blk fs/quota/quota_tree.c:70 [inline] get_free_dqblk+0x340/0x6c0 fs/quota/quota_tree.c:136 do_insert_tree+0x298/0x1440 fs/quota/quota_tree.c:347 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 dq_insert_tree fs/quota/quota_tree.c:432 [inline] qtree_write_dquot+0x483/0x5a0 fs/quota/quota_tree.c:451 v2_write_dquot+0x11c/0x190 fs/quota/quota_v2.c:361 dquot_acquire+0x34d/0x680 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6796 dqget+0x762/0xe90 fs/quota/dquot.c:986 __dquot_initialize+0x2d9/0xea0 fs/quota/dquot.c:1515 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb70/0x1400 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x83ff/0x8b50 fs/ext4/super.c:5664 get_tree_bdev+0x3fe/0x620 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ei->i_data_sem/2 --> &dquot->dq_lock --> &s->s_dquot.dqio_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&s->s_dquot.dqio_sem); lock(&dquot->dq_lock); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); *** DEADLOCK *** 3 locks held by syz.4.2704/12342: #0: ffff88806494a0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228 #1: ffff88807186c268 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_acquire+0x64/0x680 fs/quota/dquot.c:460 #2: ffff88806494a208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x9b/0x190 fs/quota/quota_v2.c:357 stack backtrace: CPU: 1 PID: 12342 Comm: syz.4.2704 Not tainted 6.1.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 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+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x379/0x1cb0 fs/ext4/inode.c:603 ext4_getblk+0x1eb/0x7c0 fs/ext4/inode.c:889 ext4_bread+0x2a/0x170 fs/ext4/inode.c:945 ext4_quota_write+0x21e/0x570 fs/ext4/super.c:7170 write_blk fs/quota/quota_tree.c:70 [inline] get_free_dqblk+0x340/0x6c0 fs/quota/quota_tree.c:136 do_insert_tree+0x298/0x1440 fs/quota/quota_tree.c:347 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 do_insert_tree+0xb94/0x1440 fs/quota/quota_tree.c:402 dq_insert_tree fs/quota/quota_tree.c:432 [inline] qtree_write_dquot+0x483/0x5a0 fs/quota/quota_tree.c:451 v2_write_dquot+0x11c/0x190 fs/quota/quota_v2.c:361 dquot_acquire+0x34d/0x680 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6796 dqget+0x762/0xe90 fs/quota/dquot.c:986 __dquot_initialize+0x2d9/0xea0 fs/quota/dquot.c:1515 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb70/0x1400 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x83ff/0x8b50 fs/ext4/super.c:5664 get_tree_bdev+0x3fe/0x620 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fa7d6d7f79a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa7d7bb5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa7d7bb5ef0 RCX: 00007fa7d6d7f79a RDX: 0000000020000100 RSI: 0000000020000080 RDI: 00007fa7d7bb5eb0 RBP: 0000000020000100 R08: 00007fa7d7bb5ef0 R09: 0000000003000010 R10: 0000000003000010 R11: 0000000000000246 R12: 0000000020000080 R13: 00007fa7d7bb5eb0 R14: 0000000000000528 R15: 00000000200001c0 EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #3: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4): ext4_dirty_inode:6086: inode #3: comm syz.4.2704: mark_inode_dirty error EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #3: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4): __ext4_ext_dirty:202: inode #3: comm syz.4.2704: mark_inode_dirty error __quota_error: 17 callbacks suppressed Quota error (device loop4): write_blk: dquota write failed Quota error (device loop4): qtree_write_dquot: Error -117 occurred while creating quota EXT4-fs error (device loop4): ext4_acquire_dquot:6800: comm syz.4.2704: Failed to acquire dquot type 0 EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #16: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4): ext4_dirty_inode:6086: inode #16: comm syz.4.2704: mark_inode_dirty error EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #16: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4): __ext4_ext_dirty:202: inode #16: comm syz.4.2704: mark_inode_dirty error EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #16: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4) in ext4_orphan_del:305: Corrupt filesystem EXT4-fs error (device loop4): ext4_do_update_inode:5224: inode #16: comm syz.4.2704: corrupted inode contents EXT4-fs error (device loop4): ext4_truncate:4311: inode #16: comm syz.4.2704: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_process_orphan:347: Corrupt filesystem EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.