====================================================== ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/14853 is trying to acquire lock: 00000000bfd0c138 (&ei->i_data_sem/2){++++}, at: ext4_map_blocks+0x33e/0x1a50 fs/ext4/inode.c:578 but task is already holding lock: 0000000066e49864 (&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_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 -> #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_get_block+0x208/0x530 fs/ext4/inode.c:810 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978 ext4_write_begin+0x52d/0x1610 fs/ext4/inode.c:1345 ext4_da_write_begin+0x737/0x10e0 fs/ext4/inode.c:3051 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 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_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 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 *** 4 locks held by syz-executor.1/14853: #0: 00000000157f9752 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000157f9752 (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000d5d82d06 (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 00000000d5d82d06 (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x15a/0x490 fs/namei.c:3638 #2: 00000000c6f53cf1 (&dquot->dq_lock){+.+.}, at: dquot_acquire+0x54/0x490 fs/quota/dquot.c:426 #3: 0000000066e49864 (&s->s_dquot.dqio_sem){++++}, at: v2_write_dquot+0x8b/0x250 fs/quota/quota_v2.c:355 stack backtrace: CPU: 0 PID: 14853 Comm: syz-executor.1 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 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_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 RIP: 0033:0x7ff93e9400d9 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:00007ff93ceb2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ff93ea5ff80 RCX: 00007ff93e9400d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007ff93e99bae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc696741bf R14: 00007ff93ceb2300 R15: 0000000000022000 EXT4-fs (loop4): warning: checktime reached, running e2fsck is recommended EXT4-fs error (device loop4): ext4_xattr_ibody_find:2199: inode #15: comm syz-executor.4: corrupted in-inode xattr Quota error (device loop1): find_block_dqentry: Quota for id 0 referenced but not present Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 EXT4-fs error (device loop4): ext4_orphan_get:1235: comm syz-executor.4: couldn't read orphan inode 15 (err -117) EXT4-fs (loop4): mounted filesystem without journal. Opts: abort,debug_want_extra_isize=0x000000000000003a,,errors=continue xt_CT: No such helper "snmp" netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. xt_CT: No such helper "snmp" netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. xt_CT: No such helper "snmp" xt_CT: No such helper "snmp" xt_CT: No such helper "snmp" audit: type=1804 audit(1670654029.868:43): pid=15106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/187/bus" dev="sda1" ino=13887 res=1 audit: type=1804 audit(1670654029.948:44): pid=15110 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/187/bus" dev="sda1" ino=13887 res=1 xt_CT: No such helper "snmp" audit: type=1804 audit(1670654031.218:45): pid=15177 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/188/bus" dev="sda1" ino=13887 res=1 audit: type=1804 audit(1670654031.298:46): pid=15182 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/188/bus" dev="sda1" ino=13887 res=1 xt_CT: No such helper "snmp" audit: type=1804 audit(1670654032.208:47): pid=15235 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/189/bus" dev="sda1" ino=13887 res=1 audit: type=1804 audit(1670654032.268:48): pid=15238 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/189/bus" dev="sda1" ino=13887 res=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1670654033.348:49): pid=15303 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/190/bus" dev="sda1" ino=13887 res=1 audit: type=1804 audit(1670654033.398:50): pid=15305 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir777084626/syzkaller.vyZHq8/190/bus" dev="sda1" ino=13887 res=1 erofs: read_super, device -> /dev/loop2 erofs: options -> erofs: read_super, device -> /dev/loop4 erofs: unidentified requirements 1, please upgrade kernel version erofs: options -> erofs: unidentified requirements 1, please upgrade kernel version erofs: read_super, device -> /dev/loop4 erofs: options -> EXT4-fs (loop2): can't mount with dioread_nolock if block size != PAGE_SIZE erofs: unidentified requirements 1, please upgrade kernel version EXT4-fs error (device loop5): ext4_ext_check_inode:498: inode #15: comm syz-executor.5: pblk 0 bad header/extent: invalid eh_entries - magic f30a, entries 24833, max 4(4), depth 0(0) EXT4-fs (loop2): can't mount with dioread_nolock if block size != PAGE_SIZE