EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended ====================================================== WARNING: possible circular locking dependency detected 6.1.55-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/7547 is trying to acquire lock: ffff0000e21d70e0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_map_blocks+0x2ac/0x1850 fs/ext4/inode.c:574 but task is already holding lock: ffff0001243b0208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_read_dquot+0x50/0x11c fs/quota/quota_v2.c:332 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x64/0x308 kernel/locking/rwsem.c:1520 v2_read_dquot+0x50/0x11c fs/quota/quota_v2.c:332 dquot_acquire+0x130/0x5c4 fs/quota/dquot.c:459 ext4_acquire_dquot+0x270/0x398 fs/ext4/super.c:6769 dqget+0x660/0xc9c fs/quota/dquot.c:972 __dquot_initialize+0x344/0xb54 fs/quota/dquot.c:1550 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1608 ext4_process_orphan+0x5c/0x2b8 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0x974/0x1134 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x6f04/0x7570 fs/ext4/super.c:5664 get_tree_bdev+0x360/0x54c fs/super.c:1355 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5694 vfs_get_tree+0x90/0x274 fs/super.c:1562 do_new_mount+0x25c/0x8c4 fs/namespace.c:3040 path_mount+0x590/0xe58 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 -> #1 (&dquot->dq_lock){+.+.}-{3:3}: __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:503 ext4_write_dquot+0x1b0/0x284 fs/ext4/super.c:6753 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6801 mark_dquot_dirty fs/quota/dquot.c:370 [inline] mark_all_dquot_dirty fs/quota/dquot.c:408 [inline] __dquot_alloc_space+0x47c/0xd00 fs/quota/dquot.c:1780 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+0xf04/0x468c fs/ext4/mballoc.c:5634 ext4_ext_map_blocks+0x13e8/0x6040 fs/ext4/extents.c:4287 ext4_map_blocks+0x828/0x1850 fs/ext4/inode.c:651 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:854 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:910 ext4_append+0x260/0x4cc fs/ext4/namei.c:83 ext4_init_new_dir+0x294/0x8e4 fs/ext4/namei.c:2981 ext4_mkdir+0x3d4/0xa64 fs/ext4/namei.c:3027 vfs_mkdir+0x334/0x4e4 fs/namei.c:4036 do_mkdirat+0x20c/0x610 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4074 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 -> #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 kernel/locking/lockdep.c:3824 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5048 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661 down_read+0x64/0x308 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x2ac/0x1850 fs/ext4/inode.c:574 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:854 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:910 ext4_quota_read+0x178/0x294 fs/ext4/super.c:7089 read_blk fs/quota/quota_tree.c:55 [inline] find_tree_dqentry+0x164/0xa08 fs/quota/quota_tree.c:624 find_tree_dqentry+0x394/0xa08 fs/quota/quota_tree.c:640 find_dqentry fs/quota/quota_tree.c:652 [inline] qtree_read_dquot+0x12c/0x634 fs/quota/quota_tree.c:672 v2_read_dquot+0xc0/0x11c fs/quota/quota_v2.c:333 dquot_acquire+0x130/0x5c4 fs/quota/dquot.c:459 ext4_acquire_dquot+0x270/0x398 fs/ext4/super.c:6769 dqget+0x660/0xc9c fs/quota/dquot.c:972 __dquot_initialize+0x344/0xb54 fs/quota/dquot.c:1550 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1608 ext4_process_orphan+0x5c/0x2b8 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0x974/0x1134 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x6f04/0x7570 fs/ext4/super.c:5664 get_tree_bdev+0x360/0x54c fs/super.c:1355 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5694 vfs_get_tree+0x90/0x274 fs/super.c:1562 do_new_mount+0x25c/0x8c4 fs/namespace.c:3040 path_mount+0x590/0xe58 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 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-executor.4/7547: #0: ffff0001243b00e0 (&type->s_umount_key#26/1){+.+.}-{3:3}, at: alloc_super+0x1b4/0x824 fs/super.c:228 #1: ffff000125e67068 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_acquire+0x68/0x5c4 fs/quota/dquot.c:456 #2: ffff0001243b0208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_read_dquot+0x50/0x11c fs/quota/quota_v2.c:332 stack backtrace: CPU: 1 PID: 7547 Comm: syz-executor.4 Not tainted 6.1.55-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 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:3824 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5048 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661 down_read+0x64/0x308 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x2ac/0x1850 fs/ext4/inode.c:574 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:854 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:910 ext4_quota_read+0x178/0x294 fs/ext4/super.c:7089 read_blk fs/quota/quota_tree.c:55 [inline] find_tree_dqentry+0x164/0xa08 fs/quota/quota_tree.c:624 find_tree_dqentry+0x394/0xa08 fs/quota/quota_tree.c:640 find_dqentry fs/quota/quota_tree.c:652 [inline] qtree_read_dquot+0x12c/0x634 fs/quota/quota_tree.c:672 v2_read_dquot+0xc0/0x11c fs/quota/quota_v2.c:333 dquot_acquire+0x130/0x5c4 fs/quota/dquot.c:459 ext4_acquire_dquot+0x270/0x398 fs/ext4/super.c:6769 dqget+0x660/0xc9c fs/quota/dquot.c:972 __dquot_initialize+0x344/0xb54 fs/quota/dquot.c:1550 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1608 ext4_process_orphan+0x5c/0x2b8 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0x974/0x1134 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5533 [inline] ext4_fill_super+0x6f04/0x7570 fs/ext4/super.c:5664 get_tree_bdev+0x360/0x54c fs/super.c:1355 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5694 vfs_get_tree+0x90/0x274 fs/super.c:1562 do_new_mount+0x25c/0x8c4 fs/namespace.c:3040 path_mount+0x590/0xe58 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 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:581 Quota error (device loop4): do_check_range: Getting dqdh_entries 65529 out of range 0-14 Quota error (device loop4): qtree_write_dquot: Error -117 occurred while creating quota Quota error (device loop4): do_check_range: Getting dqdh_entries 65529 out of range 0-14 Quota error (device loop4): qtree_write_dquot: Error -117 occurred while creating quota Quota error (device loop4): do_check_range: Getting dqdh_entries 65529 out of range 0-14 Quota error (device loop4): qtree_write_dquot: Error -117 occurred while creating quota EXT4-fs (loop4): 1 orphan inode deleted EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.