9pnet_virtio: no channels available for device 127.0.0.1
==================================================================
BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133
Write of size 1 at addr ffff8880b3df874e by task syz-executor.2/27268

CPU: 0 PID: 27268 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
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_store1_noabort+0x88/0x90 mm/kasan/report.c:435
 hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133
 hfs_cat_build_key+0xbe/0x1a0 fs/hfs/catalog.c:28
 hfs_lookup+0x1c2/0x300 fs/hfs/dir.c:31
 __lookup_hash+0x117/0x180 fs/namei.c:1547
 filename_create+0x186/0x490 fs/namei.c:3639
 user_path_create fs/namei.c:3696 [inline]
 do_mkdirat+0xa0/0x2d0 fs/namei.c:3834
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f7db89470f9
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:00007f7db6eb9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7db8a66f80 RCX: 00007f7db89470f9
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f7db89a2ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeaea7fa2f R14: 00007f7db6eb9300 R15: 0000000000022000

Allocated by task 27268:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 hfs_find_init+0x91/0x230 fs/hfs/bfind.c:21
 hfs_lookup+0xfe/0x300 fs/hfs/dir.c:28
 __lookup_hash+0x117/0x180 fs/namei.c:1547
 filename_create+0x186/0x490 fs/namei.c:3639
 user_path_create fs/namei.c:3696 [inline]
 do_mkdirat+0xa0/0x2d0 fs/namei.c:3834
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8126:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 ext4_ext_map_blocks+0x9f5/0x7390 fs/ext4/extents.c:4633
 ext4_map_blocks+0x7a2/0x1a50 fs/ext4/inode.c:657
 ext4_getblk+0xad/0x4f0 fs/ext4/inode.c:993
 ext4_bread+0x7c/0x210 fs/ext4/inode.c:1043
 ext4_append+0x155/0x370 fs/ext4/namei.c:66
 ext4_init_new_dir fs/ext4/namei.c:2659 [inline]
 ext4_mkdir+0x5bd/0xe10 fs/ext4/namei.c:2706
 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

The buggy address belongs to the object at ffff8880b3df8700
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 78 bytes inside of
 96-byte region [ffff8880b3df8700, ffff8880b3df8760)
The buggy address belongs to the page:
page:ffffea0002cf7e00 count:1 mapcount:0 mapping:ffff88813bff04c0 index:0xffff8880b3df8780
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea00025d4c88 ffffea0002ad2688 ffff88813bff04c0
raw: ffff8880b3df8780 ffff8880b3df8000 0000000100000017 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b3df8600: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880b3df8680: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8880b3df8700: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff8880b3df8780: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880b3df8800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================