EXT4-fs (loop2): mounted filesystem without journal. Opts: init_itable,noquota,nouid32,barrier,noauto_da_alloc,journal_dev=0x00000000000001ff,barrier,delalloc,usrquota,,errors=continue. Quota mode: writeback. ext4 filesystem being mounted at /root/syzkaller-testdir1168500258/syzkaller.1N4sBU/48/file1 supports timestamps until 2038 (0x7fffffff) ====================================================== WARNING: possible circular locking dependency detected 5.15.155-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/5014 is trying to acquire lock: ffff888071695238 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_map_blocks+0x3a6/0x1e00 fs/ext4/inode.c:568 but task is already holding lock: ffff888073238208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x9b/0x190 fs/quota/quota_v2.c:354 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+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1498 v2_read_dquot+0x4a/0x100 fs/quota/quota_v2.c:332 dquot_acquire+0x188/0x680 fs/quota/dquot.c:463 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6192 dqget+0x74e/0xe30 fs/quota/dquot.c:986 __dquot_initialize+0x45e/0xea0 fs/quota/dquot.c:1516 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0x9d9/0x1240 fs/ext4/orphan.c:474 ext4_fill_super+0x98de/0xa110 fs/ext4/super.c:4974 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&dquot->dq_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x57/0x510 fs/quota/dquot.c:507 ext4_write_dquot+0x1fd/0x360 fs/ext4/super.c:6172 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x1e0/0x400 fs/quota/dquot.c:412 __dquot_free_space+0x932/0xe40 fs/quota/dquot.c:1941 dquot_free_space_nodirty include/linux/quotaops.h:376 [inline] dquot_free_space include/linux/quotaops.h:381 [inline] dquot_free_block include/linux/quotaops.h:392 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6157 [inline] ext4_free_blocks+0x1f6e/0x2ea0 fs/ext4/mballoc.c:6287 ext4_remove_blocks fs/ext4/extents.c:2519 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2685 [inline] ext4_ext_remove_space+0x24da/0x4db0 fs/ext4/extents.c:2933 ext4_ext_truncate+0x191/0x250 fs/ext4/extents.c:4448 ext4_truncate+0x9fd/0x1130 fs/ext4/inode.c:4238 ext4_evict_inode+0xba1/0x1100 fs/ext4/inode.c:289 evict+0x2a4/0x620 fs/inode.c:587 ext4_orphan_cleanup+0x9d9/0x1240 fs/ext4/orphan.c:474 ext4_fill_super+0x98de/0xa110 fs/ext4/super.c:4974 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ei->i_data_sem/2){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1498 ext4_map_blocks+0x3a6/0x1e00 fs/ext4/inode.c:568 ext4_getblk+0x19f/0x710 fs/ext4/inode.c:846 ext4_bread+0x2a/0x170 fs/ext4/inode.c:899 ext4_quota_write+0x21e/0x580 fs/ext4/super.c:6566 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x3a9/0x800 fs/quota/quota_tree.c:125 do_insert_tree+0x2b4/0x1c20 fs/quota/quota_tree.c:335 do_insert_tree+0x6d0/0x1c20 fs/quota/quota_tree.c:366 dq_insert_tree fs/quota/quota_tree.c:392 [inline] qtree_write_dquot+0x3b9/0x530 fs/quota/quota_tree.c:411 v2_write_dquot+0x11c/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x34d/0x680 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6192 dqget+0x74e/0xe30 fs/quota/dquot.c:986 dquot_transfer+0x1d1/0x4e0 fs/quota/dquot.c:2145 ext4_setattr+0x91a/0x1990 fs/ext4/inode.c:5405 notify_change+0xc6d/0xf50 fs/attr.c:505 chown_common+0x592/0x890 fs/open.c:680 vfs_fchown fs/open.c:748 [inline] ksys_fchown+0xde/0x150 fs/open.c:759 __do_sys_fchown fs/open.c:767 [inline] __se_sys_fchown fs/open.c:765 [inline] __x64_sys_fchown+0x76/0x80 fs/open.c:765 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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 *** 5 locks held by syz-executor.2/5014: #0: ffff888073238460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:421 #1: ffff88805cf2dda8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff88805cf2dda8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: chown_common+0x499/0x890 fs/open.c:674 #2: ffff88805cf2da80 (&ei->xattr_sem){++++}-{3:3}, at: ext4_setattr+0x90d/0x1990 fs/ext4/inode.c:5404 #3: ffff88805f2585e8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_acquire+0x64/0x680 fs/quota/dquot.c:460 #4: ffff888073238208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x9b/0x190 fs/quota/quota_v2.c:354 stack backtrace: CPU: 1 PID: 5014 Comm: syz-executor.2 Not tainted 5.15.155-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1498 ext4_map_blocks+0x3a6/0x1e00 fs/ext4/inode.c:568 ext4_getblk+0x19f/0x710 fs/ext4/inode.c:846 ext4_bread+0x2a/0x170 fs/ext4/inode.c:899 ext4_quota_write+0x21e/0x580 fs/ext4/super.c:6566 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x3a9/0x800 fs/quota/quota_tree.c:125 do_insert_tree+0x2b4/0x1c20 fs/quota/quota_tree.c:335 do_insert_tree+0x6d0/0x1c20 fs/quota/quota_tree.c:366 dq_insert_tree fs/quota/quota_tree.c:392 [inline] qtree_write_dquot+0x3b9/0x530 fs/quota/quota_tree.c:411 v2_write_dquot+0x11c/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x34d/0x680 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2eb/0x4a0 fs/ext4/super.c:6192 dqget+0x74e/0xe30 fs/quota/dquot.c:986 dquot_transfer+0x1d1/0x4e0 fs/quota/dquot.c:2145 ext4_setattr+0x91a/0x1990 fs/ext4/inode.c:5405 notify_change+0xc6d/0xf50 fs/attr.c:505 chown_common+0x592/0x890 fs/open.c:680 vfs_fchown fs/open.c:748 [inline] ksys_fchown+0xde/0x150 fs/open.c:759 __do_sys_fchown fs/open.c:767 [inline] __se_sys_fchown fs/open.c:765 [inline] __x64_sys_fchown+0x76/0x80 fs/open.c:765 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4b6819eea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4b667110c8 EFLAGS: 00000246 ORIG_RAX: 000000000000005d RAX: ffffffffffffffda RBX: 00007f4b682ccf80 RCX: 00007f4b6819eea9 RDX: 0000000000000000 RSI: 0000000020737365 RDI: 0000000000000004 RBP: 00007f4b681eb4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4b682ccf80 R15: 00007ffe6c28c998 Quota error (device loop2): write_blk: dquota write failed Quota error (device loop2): qtree_write_dquot: Error -28 occurred while creating quota EXT4-fs error (device loop2): ext4_acquire_dquot:6196: comm syz-executor.2: Failed to acquire dquot type 0