BTRFS error (device loop0): superblock checksum mismatch
BTRFS error (device loop0): open_ctree failed
==================================================================
BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880480bf4e0 by task syz-executor.4/6432

CPU: 1 PID: 6432 Comm: syz-executor.4 Not tainted 4.19.152-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/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
 squashfs_new_inode fs/squashfs/inode.c:64 [inline]
 squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
 squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x30c fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4608aa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007efe0b104a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007efe0b104b20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007efe0b104ae0
RBP: 00007efe0b104ae0 R08: 00007efe0b104b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000080 R15: 0000000020000540

Allocated by task 4622:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc_track_caller+0x155/0x3c0 mm/slab.c:3742
 kstrdup+0x36/0x70 mm/util.c:56
 kstrdup_const+0x53/0x80 mm/util.c:77
 __kernfs_new_node+0x9b/0x680 fs/kernfs/dir.c:629
 kernfs_new_node fs/kernfs/dir.c:693 [inline]
 kernfs_create_dir_ns+0x9e/0x230 fs/kernfs/dir.c:1019
 sysfs_create_dir_ns+0x127/0x280 fs/sysfs/dir.c:58
 create_dir lib/kobject.c:88 [inline]
 kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247
 kobject_add_varg lib/kobject.c:382 [inline]
 kobject_init_and_add+0x101/0x160 lib/kobject.c:453
 rx_queue_add_kobject net/core/net-sysfs.c:937 [inline]
 net_rx_queue_update_kobjects+0x1bb/0x450 net/core/net-sysfs.c:970
 register_queue_kobjects net/core/net-sysfs.c:1546 [inline]
 netdev_register_kobject+0x279/0x430 net/core/net-sysfs.c:1769
 register_netdevice+0xb46/0x10f0 net/core/dev.c:8717
 veth_newlink+0x3eb/0x930 drivers/net/veth.c:1143
 rtnl_newlink+0x1027/0x15b0 net/core/rtnetlink.c:3141
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4778
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115
 __sys_sendmsg net/socket.c:2153 [inline]
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880480bf4c0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff8880480bf4c0, ffff8880480bf4e0)
The buggy address belongs to the page:
page:ffffea0001202fc0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880480bffc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0001202d48 ffffea0002ac7cc8 ffff88813bff01c0
raw: ffff8880480bffc1 ffff8880480bf000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880480bf380: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880480bf400: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc
>ffff8880480bf480: 00 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc
                                                       ^
 ffff8880480bf500: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880480bf580: 00 01 fc fc fc fc fc fc 00 01 fc fc fc fc fc fc
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