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BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff888059977838 by task syz-executor.4/4684

CPU: 1 PID: 4684 Comm: syz-executor.4 Not tainted 4.19.163-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:68 [inline]
 squashfs_read_inode+0x1ee/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
overlayfs: unrecognized mount option "work" or missing value
 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
overlayfs: unrecognized mount option "work" or missing value
RIP: 0033:0x460baa
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:00007fa9be272a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa9be272b10 RCX: 0000000000460baa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fa9be272ad0
RBP: 00007fa9be272ad0 R08: 00007fa9be272b10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010200

Allocated by task 27116:
 __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
 netdev_queue_add_kobject net/core/net-sysfs.c:1481 [inline]
 netdev_queue_update_kobjects+0x128/0x3c0 net/core/net-sysfs.c:1509
 register_queue_kobjects net/core/net-sysfs.c:1551 [inline]
 netdev_register_kobject+0x35e/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 26343:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 bpf_migrate_filter+0x307/0x380 net/core/filter.c:1277
 bpf_prepare_filter+0x183/0x370 net/core/filter.c:1321
 bpf_prog_create_from_user+0x1e4/0x2e0 net/core/filter.c:1415
 seccomp_prepare_filter kernel/seccomp.c:394 [inline]
 seccomp_prepare_user_filter kernel/seccomp.c:429 [inline]
 seccomp_set_mode_filter kernel/seccomp.c:861 [inline]
 do_seccomp+0x386/0x1c40 kernel/seccomp.c:934
 prctl_set_seccomp+0x4a/0x70 kernel/seccomp.c:982
 __do_sys_prctl kernel/sys.c:2345 [inline]
 __se_sys_prctl+0x2d8/0xd80 kernel/sys.c:2263
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888059977800
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes to the right of
 32-byte region [ffff888059977800, ffff888059977820)
The buggy address belongs to the page:
page:ffffea0001665dc0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff888059977fc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002ac8a88 ffffea0001616488 ffff88813bff01c0
raw: ffff888059977fc1 ffff888059977000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888059977700: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
 ffff888059977780: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff888059977800: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
                                        ^
 ffff888059977880: fb fb fb fb fc fc fc fc 07 fc fc fc fc fc fc fc
 ffff888059977900: 07 fc fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
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