EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue
Quota error (device loop5): find_block_dqentry: Quota for id 0 referenced but not present
WARNING: CPU: 1 PID: 10689 at fs/ext4/xattr.c:1661 ext4_xattr_set_entry+0x2910/0x3690 fs/ext4/xattr.c:1661
Kernel panic - not syncing: panic_on_warn set ...

Quota error (device loop5): qtree_read_dquot: Can't read quota structure for id 0
CPU: 1 PID: 10689 Comm: syz-executor.2 Not tainted 4.19.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:ext4_xattr_set_entry+0x2910/0x3690 fs/ext4/xattr.c:1661
Code: e8 25 d3 73 ff 48 8b 7c 24 20 e8 ab ef cf ff 4c 8b b4 24 20 01 00 00 48 c7 44 24 18 00 00 00 00 e9 b2 db ff ff e8 00 d3 73 ff <0f> 0b e9 fb e7 ff ff e8 f4 d2 73 ff 48 8b 7c 24 18 e8 fa a1 f0 ff
RSP: 0018:ffff888051d773a8 EFLAGS: 00010206
RAX: 0000000000040000 RBX: ffff888097421b60 RCX: ffffc9000a12a000
RDX: 0000000000005cd0 RSI: ffffffff81ee86c0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000007 R11: 000000003bc8fe8e R12: 00000000000003dc
R13: 0000000000000000 R14: 00000000ffffffc3 R15: 0000000000000001
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
 ext4_xattr_block_set+0xf44/0x2eb0 fs/ext4/xattr.c:1963
Quota error (device loop1): find_block_dqentry: Quota for id 0 referenced but not present
 ext4_xattr_set_handle+0x9c1/0xfa0 fs/ext4/xattr.c:2411
Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0
 ext4_xattr_set+0x135/0x2a0 fs/ext4/xattr.c:2511
 __vfs_setxattr+0x10e/0x170 fs/xattr.c:149
 __vfs_setxattr_noperm+0x11a/0x420 fs/xattr.c:180
 __vfs_setxattr_locked+0x176/0x250 fs/xattr.c:238
 vfs_setxattr+0xe5/0x270 fs/xattr.c:255
 setxattr+0x23d/0x330 fs/xattr.c:520
 path_setxattr+0x170/0x190 fs/xattr.c:539
 __do_sys_setxattr fs/xattr.c:554 [inline]
 __se_sys_setxattr fs/xattr.c:550 [inline]
 __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:550
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465b09
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde76fa5188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffe43fbd23f R14: 00007fde76fa5300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..