EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/19292 is trying to acquire lock: 000000004a1ab551 (&ei->i_data_sem/2){++++}, at: ext4_map_blocks+0x33e/0x1a50 fs/ext4/inode.c:578 overlayfs: unrecognized mount option "euid<00000000000000000000" or missing value but task is already holding lock: 00000000187b0225 (&s->s_dquot.dqio_sem){++++}, at: v2_write_dquot+0x8b/0x250 fs/quota/quota_v2.c:355 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&s->s_dquot.dqio_sem){++++}: v2_read_dquot+0x49/0x120 fs/quota/quota_v2.c:333 dquot_acquire+0x121/0x490 fs/quota/dquot.c:428 ext4_acquire_dquot+0x1e7/0x2d0 fs/ext4/super.c:5666 dqget+0x785/0xfc0 fs/quota/dquot.c:896 __dquot_initialize+0x3bd/0xb70 fs/quota/dquot.c:1470 ext4_mkdir+0xd7/0xe10 fs/ext4/namei.c:2689 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819 do_mkdirat+0x262/0x2d0 fs/namei.c:3842 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&dquot->dq_lock){+.+.}: dquot_commit+0x4d/0x400 fs/quota/dquot.c:469 ext4_write_dquot+0x1e7/0x280 fs/ext4/super.c:5650 ext4_mark_dquot_dirty+0x111/0x1a0 fs/ext4/super.c:5701 mark_dquot_dirty fs/quota/dquot.c:341 [inline] mark_all_dquot_dirty fs/quota/dquot.c:379 [inline] __dquot_alloc_space+0x37e/0x860 fs/quota/dquot.c:1702 dquot_alloc_space_nodirty include/linux/quotaops.h:298 [inline] dquot_alloc_space include/linux/quotaops.h:311 [inline] dquot_alloc_block include/linux/quotaops.h:335 [inline] ext4_mb_new_blocks+0x58c/0x4370 fs/ext4/mballoc.c:4534 ext4_ext_map_blocks+0x2aa2/0x7390 fs/ext4/extents.c:4493 ext4_map_blocks+0x7a2/0x1a50 fs/ext4/inode.c:657 ext4_getblk+0xad/0x4f0 fs/ext4/inode.c:993 ext4_bread+0x7c/0x210 fs/ext4/inode.c:1043 ext4_append+0x155/0x370 fs/ext4/namei.c:66 ext4_init_new_dir fs/ext4/namei.c:2659 [inline] ext4_mkdir+0x5bd/0xe10 fs/ext4/namei.c:2706 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819 do_mkdirat+0x262/0x2d0 fs/namei.c:3842 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ei->i_data_sem/2){++++}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 ext4_map_blocks+0x33e/0x1a50 fs/ext4/inode.c:578 ext4_getblk+0xad/0x4f0 fs/ext4/inode.c:993 ext4_bread+0x7c/0x210 fs/ext4/inode.c:1043 ext4_quota_write+0x205/0x530 fs/ext4/super.c:6008 write_blk+0x10a/0x200 fs/quota/quota_tree.c:72 get_free_dqblk+0xff/0x2d0 fs/quota/quota_tree.c:101 do_insert_tree+0x79c/0x1150 fs/quota/quota_tree.c:308 do_insert_tree+0xf5c/0x1150 fs/quota/quota_tree.c:339 dq_insert_tree fs/quota/quota_tree.c:365 [inline] qtree_write_dquot+0x1cb/0x570 fs/quota/quota_tree.c:384 v2_write_dquot+0x11c/0x250 fs/quota/quota_v2.c:359 dquot_acquire+0x25c/0x490 fs/quota/dquot.c:436 ext4_acquire_dquot+0x1e7/0x2d0 fs/ext4/super.c:5666 dqget+0x785/0xfc0 fs/quota/dquot.c:896 dquot_transfer+0x2b0/0x4c0 fs/quota/dquot.c:2090 ext4_setattr+0x58a/0x2560 fs/ext4/inode.c:5604 notify_change+0x70b/0xfc0 fs/attr.c:334 chown_common+0x4a9/0x550 fs/open.c:651 do_fchownat+0x126/0x1e0 fs/open.c:681 __do_sys_chown fs/open.c:701 [inline] __se_sys_chown fs/open.c:699 [inline] __x64_sys_chown+0x77/0xb0 fs/open.c:699 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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.4/19292: #0: 0000000070b907b8 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000070b907b8 (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 000000008a16a895 (&type->i_mutex_dir_key#3){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 000000008a16a895 (&type->i_mutex_dir_key#3){++++}, at: chown_common+0x2d0/0x550 fs/open.c:648 #2: 00000000a09bb9af (&ei->xattr_sem){++++}, at: ext4_setattr+0x57f/0x2560 fs/ext4/inode.c:5603 #3: 0000000041738ba6 (&dquot->dq_lock){+.+.}, at: dquot_acquire+0x54/0x490 fs/quota/dquot.c:426 #4: 00000000187b0225 (&s->s_dquot.dqio_sem){++++}, at: v2_write_dquot+0x8b/0x250 fs/quota/quota_v2.c:355 stack backtrace: CPU: 0 PID: 19292 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 down_read+0x36/0x80 kernel/locking/rwsem.c:24 ext4_map_blocks+0x33e/0x1a50 fs/ext4/inode.c:578 ext4_getblk+0xad/0x4f0 fs/ext4/inode.c:993 ext4_bread+0x7c/0x210 fs/ext4/inode.c:1043 ext4_quota_write+0x205/0x530 fs/ext4/super.c:6008 write_blk+0x10a/0x200 fs/quota/quota_tree.c:72 get_free_dqblk+0xff/0x2d0 fs/quota/quota_tree.c:101 do_insert_tree+0x79c/0x1150 fs/quota/quota_tree.c:308 do_insert_tree+0xf5c/0x1150 fs/quota/quota_tree.c:339 dq_insert_tree fs/quota/quota_tree.c:365 [inline] qtree_write_dquot+0x1cb/0x570 fs/quota/quota_tree.c:384 v2_write_dquot+0x11c/0x250 fs/quota/quota_v2.c:359 dquot_acquire+0x25c/0x490 fs/quota/dquot.c:436 ext4_acquire_dquot+0x1e7/0x2d0 fs/ext4/super.c:5666 dqget+0x785/0xfc0 fs/quota/dquot.c:896 dquot_transfer+0x2b0/0x4c0 fs/quota/dquot.c:2090 ext4_setattr+0x58a/0x2560 fs/ext4/inode.c:5604 notify_change+0x70b/0xfc0 fs/attr.c:334 chown_common+0x4a9/0x550 fs/open.c:651 do_fchownat+0x126/0x1e0 fs/open.c:681 __do_sys_chown fs/open.c:701 [inline] __se_sys_chown fs/open.c:699 [inline] __x64_sys_chown+0x77/0xb0 fs/open.c:699 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1b634c20c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1b61a34168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c RAX: ffffffffffffffda RBX: 00007f1b635e1f80 RCX: 00007f1b634c20c9 RDX: 00000000ffffff00 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00007f1b6351dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc15d23b0f R14: 00007f1b61a34300 R15: 0000000000022000 overlayfs: unrecognized mount option "upperäir=./bus\/âÐ31ª@" or missing value overlayfs: unrecognized mount option "euid<00000000000000000000" or missing value overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled overlayfs: unrecognized mount option "upperäir=./bus\/âÐ31ª@" or missing value EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: unrecognized mount option "euid<00000000000000000000" or missing value EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: unrecognized mount option "upperäir=./bus\/âÐ31ª@" or missing value EXT4-fs (loop4): Unrecognized mount option "›šL’" or missing value 9pnet: Insufficient options for proto=fd EXT4-fs (loop4): Unrecognized mount option "›šL’" or missing value 9pnet: Insufficient options for proto=fd EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: failed to resolve './file2/': -2 EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: failed to resolve './file2/': -2 EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: unrecognized mount option "workdig ÚC‰$zzšr=./fileÚÉÊÃjÁ@I†0ò1" or missing value EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: unrecognized mount option "workdig ÚC‰$zzšr=./fileÚÉÊÃjÁ@I†0ò1" or missing value EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: unrecognized mount option "workdig ÚC‰$zzšr=./fileÚÉÊÃjÁ@I†0ò1" or missing value EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: failed to resolve './bus/': -20 EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: failed to resolve './bus/': -20 overlayfs: failed to resolve './bus/': -20 EXT4-fs (loop4): Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop4): mounted filesystem without journal. Opts: acl,jqfmt=vfsv0,nouid32,,errors=continue overlayfs: failed to resolve './bus/': -20