[syzbot] [hfs?] memory leak in hfs_init_fs_context

[syzbot <syzbot+ad45f827c88778ff7df6@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    4ea7c1717f3f Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17346c12580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cb128cd5cb439809
dashboard link: https://syzkaller.appspot.com/bug?extid=ad45f827c88778ff7df6
compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143f5c12580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17c9a7cd980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1f8cf51c9042/disk-4ea7c171.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6f227246b5b7/vmlinux-4ea7c171.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f935766a00b3/bzImage-4ea7c171.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/bee9311f4026/mount_4.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ad45f827c88778ff7df6@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888111778c00 (size 512):
  comm "syz.0.17", pid 6092, jiffies 4294942644
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc eb1d7412):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4979 [inline]
    slab_alloc_node mm/slub.c:5284 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5762
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfs_init_fs_context+0x24/0xd0 fs/hfs/super.c:411
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3707 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4037
    do_mount fs/namespace.c:4050 [inline]
    __do_sys_mount fs/namespace.c:4238 [inline]
    __se_sys_mount fs/namespace.c:4215 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4215
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810a2e8800 (size 512):
  comm "syz.0.18", pid 6098, jiffies 4294942646
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc eb1d7412):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4979 [inline]
    slab_alloc_node mm/slub.c:5284 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5762
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfs_init_fs_context+0x24/0xd0 fs/hfs/super.c:411
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3707 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4037
    do_mount fs/namespace.c:4050 [inline]
    __do_sys_mount fs/namespace.c:4238 [inline]
    __se_sys_mount fs/namespace.c:4215 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4215
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810a2e8e00 (size 512):
  comm "syz.0.19", pid 6102, jiffies 4294942648
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc eb1d7412):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4979 [inline]
    slab_alloc_node mm/slub.c:5284 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5762
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfs_init_fs_context+0x24/0xd0 fs/hfs/super.c:411
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3707 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4037
    do_mount fs/namespace.c:4050 [inline]
    __do_sys_mount fs/namespace.c:4238 [inline]
    __se_sys_mount fs/namespace.c:4215 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4215
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff8881263ed600 (size 512):
  comm "syz.0.20", pid 6125, jiffies 4294943177
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc eb1d7412):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4979 [inline]
    slab_alloc_node mm/slub.c:5284 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5762
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfs_init_fs_context+0x24/0xd0 fs/hfs/super.c:411
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3707 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4037
    do_mount fs/namespace.c:4050 [inline]
    __do_sys_mount fs/namespace.c:4238 [inline]
    __se_sys_mount fs/namespace.c:4215 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4215
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810db18c00 (size 512):
  comm "syz.0.21", pid 6127, jiffies 4294943179
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc eb1d7412):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4979 [inline]
    slab_alloc_node mm/slub.c:5284 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5762
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfs_init_fs_context+0x24/0xd0 fs/hfs/super.c:411
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3707 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4037
    do_mount fs/namespace.c:4050 [inline]
    __do_sys_mount fs/namespace.c:4238 [inline]
    __se_sys_mount fs/namespace.c:4215 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4215
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF


---
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