audit: type=1804 audit(1672737452.924:416): pid=21511 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3336408676/syzkaller.nSeA1t/211/bus" dev="sda1" ino=14264 res=1 audit: type=1800 audit(1672737453.054:417): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/21548 is trying to acquire lock: 000000006632913d (&dquot->dq_lock){+.+.}, at: dquot_commit+0x4d/0x400 fs/quota/dquot.c:469 but task is already holding lock: 000000003d8f66fd (&ei->i_data_sem/2){++++}, at: ext4_map_blocks+0x740/0x1a50 fs/ext4/inode.c:650 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}: 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_initialize+0x3bd/0xb70 fs/quota/dquot.c:1470 ext4_rmdir+0x1b1/0xe20 fs/ext4/namei.c:3006 vfs_rmdir.part.0+0x10f/0x3d0 fs/namei.c:3882 vfs_rmdir fs/namei.c:3868 [inline] do_rmdir+0x3fd/0x490 fs/namei.c:3943 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&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_create+0x84/0x5f0 fs/ext4/namei.c:2510 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&dquot->dq_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 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 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-executor.4/21548: #0: 00000000a2dde358 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000a2dde358 (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 0000000050279538 (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 0000000050279538 (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x15a/0x490 fs/namei.c:3638 #2: 000000003d8f66fd (&ei->i_data_sem/2){++++}, at: ext4_map_blocks+0x740/0x1a50 fs/ext4/inode.c:650 #3: 000000000e4f521c (dquot_srcu){....}, at: i_dquot fs/quota/dquot.c:921 [inline] #3: 000000000e4f521c (dquot_srcu){....}, at: __dquot_alloc_space+0x1ad/0x860 fs/quota/dquot.c:1662 stack backtrace: CPU: 1 PID: 21548 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 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 RIP: 0033:0x7efd8dbba0a9 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:00007efd83cc7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007efd8dcda390 RCX: 00007efd8dbba0a9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: ffffffffffffff9c RBP: 00007efd8dc15ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc25117e5f R14: 00007efd83cc7300 R15: 0000000000022000 kauditd_printk_skb: 1 callbacks suppressed audit: type=1800 audit(1672737453.874:419): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.874:420): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:421): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:422): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:423): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:424): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:425): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:426): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:427): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 audit: type=1800 audit(1672737453.884:428): pid=21544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14435 res=0 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 64 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. IPVS: ftp: loaded support on port[0] = 21 netlink: 64 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: failed to resolve './file1': -2 netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: failed to resolve './file1': -2 netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: failed to resolve './file1': -2 9pnet: Insufficient options for proto=fd netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. 9pnet: Insufficient options for proto=fd netlink: 64 bytes leftover after parsing attributes in process `syz-executor.0'. 9pnet: Insufficient options for proto=fd overlayfs: unrecognized mount option "upperdir³/FøóO¡@Ø\=./bus" or missing value overlayfs: unrecognized mount option "upperdir³/FøóO¡@Ø\=./bus" or missing value overlayfs: unrecognized mount option "obj_type=overlay" or missing value overlayfs: unrecognized mount option "upperdir³/FøóO¡@Ø\=./bus" or missing value 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd mac80211_hwsim hwsim7 : renamed from wlan1 nla_parse: 13 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. x_tables: ip6_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from FORWARD/OUTPUT/POSTROUTING netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. x_tables: ip6_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from FORWARD/OUTPUT/POSTROUTING netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. block nbd5: shutting down sockets netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. x_tables: ip6_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from FORWARD/OUTPUT/POSTROUTING x_tables: ip6_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from FORWARD/OUTPUT/POSTROUTING x_tables: ip6_tables: CLASSIFY target: used from hooks PREROUTING, but only usable from FORWARD/OUTPUT/POSTROUTING netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. block nbd5: Device being setup by another task netlink: 64 bytes leftover after parsing attributes in process `syz-executor.3'. ********************************************************** ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** ** ** ** trace_printk() being used. Allocating extra memory. ** ** **