MTD: Attempt to mount non-MTD device "/dev/loop4"
romfs: Mounting image 'rom 5f663c08' through the block layer
UBIFS error (pid: 520): cannot open "/dev/loop3", error -22
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x780/0x860 fs/udf/inode.c:2065
Write of size 4 at addr ffff888049ba6ff0 by task syz-executor.3/535

CPU: 1 PID: 535 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_store_n_noabort+0x8b/0xa0 mm/kasan/report.c:449
 udf_write_aext+0x780/0x860 fs/udf/inode.c:2065
 udf_add_entry+0xdab/0x2a20 fs/udf/namei.c:496
 udf_mkdir+0x145/0x650 fs/udf/namei.c:693
 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: 0033:0x7f8285cfa5a9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f828460a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f8285e1b1f0 RCX: 00007f8285cfa5a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007f8285d55580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0373f3df R14: 00007f828460a300 R15: 0000000000022000

Allocated by task 32351:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 pskb_expand_head+0x159/0xf20 net/core/skbuff.c:1473
 skb_ensure_writable+0x2c6/0x470 net/core/skbuff.c:5196
 __bpf_try_make_writable net/core/filter.c:1633 [inline]
 bpf_try_make_writable net/core/filter.c:1639 [inline]
 bpf_try_make_head_writable net/core/filter.c:1647 [inline]
 ____bpf_clone_redirect net/core/filter.c:2088 [inline]
 bpf_clone_redirect+0x131/0x430 net/core/filter.c:2066
 ___bpf_prog_run+0x1bfa/0x4e80 kernel/bpf/core.c:1184

Freed by task 32351:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 skb_free_head net/core/skbuff.c:563 [inline]
 skb_release_data+0x6de/0x920 net/core/skbuff.c:583
 skb_release_all net/core/skbuff.c:640 [inline]
 __kfree_skb net/core/skbuff.c:654 [inline]
 kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672
 vti_tunnel_xmit+0x539/0x1850 net/ipv4/ip_vti.c:340
 __netdev_start_xmit include/linux/netdevice.h:4349 [inline]
 netdev_start_xmit include/linux/netdevice.h:4363 [inline]
 xmit_one net/core/dev.c:3256 [inline]
 dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
 __bpf_tx_skb net/core/filter.c:2015 [inline]
 __bpf_redirect_common net/core/filter.c:2054 [inline]
 __bpf_redirect+0x746/0xbc0 net/core/filter.c:2061
 ____bpf_clone_redirect net/core/filter.c:2094 [inline]
 bpf_clone_redirect+0x2c0/0x430 net/core/filter.c:2066
 ___bpf_prog_run+0x1bfa/0x4e80 kernel/bpf/core.c:1184

The buggy address belongs to the object at ffff888049ba6cc0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 304 bytes to the right of
 512-byte region [ffff888049ba6cc0, ffff888049ba6ec0)
The buggy address belongs to the page:
page:ffffea000126e980 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002bcb788 ffffea0001119e88 ffff88813bff0940
raw: 0000000000000000 ffff888049ba6040 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888049ba6e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888049ba6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888049ba6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff888049ba7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888049ba7080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================