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memory leak in hfsplus_init_fs_context

Status: upstream: reported C repro on 2025/12/05 05:38
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+99f6ed51479b86ac4c41@syzkaller.appspotmail.com
First crash: 73d, last: 59d
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[PATCH v2] hfsplus: fix s_fs_info leak on mount setup failure 13 (13) 2026/02/11 23:49
[PATCH] fs/super: fix s_fs_info leak when setup_bdev_super() fails 3 (3) 2026/02/01 11:39
[PATCH v1] hfsplus: fix memory leak on mount failure 2 (3) 2025/12/06 00:09
[syzbot] [hfs?] memory leak in hfsplus_init_fs_context 0 (5) 2025/12/05 14:48
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/12/15 06:12 17m retest repro upstream report log
2025/12/05 18:39 17m swarajgaikwad1925@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git e69c7c175115 error
2025/12/05 14:48 14m kartikey406@gmail.com patch upstream report log
2025/12/05 12:43 59m kartikey406@gmail.com patch upstream report log
2025/12/05 07:51 46m kartikey406@gmail.com patch upstream error
2025/12/05 06:28 1h07m kartikey406@gmail.com patch upstream error

Sample crash report:
BUG: memory leak
unreferenced object 0xffff8881287f8a00 (size 512):
  comm "syz.0.17", pid 6072, jiffies 4294944858
  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 aaf4239b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4983 [inline]
    slab_alloc_node mm/slub.c:5288 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfsplus_init_fs_context+0x26/0x90 fs/hfsplus/super.c:678
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3698 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4028
    do_mount fs/namespace.c:4041 [inline]
    __do_sys_mount fs/namespace.c:4229 [inline]
    __se_sys_mount fs/namespace.c:4206 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4206
    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 0xffff8881287f9a00 (size 512):
  comm "syz.0.18", pid 6078, jiffies 4294944862
  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 aaf4239b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4983 [inline]
    slab_alloc_node mm/slub.c:5288 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfsplus_init_fs_context+0x26/0x90 fs/hfsplus/super.c:678
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3698 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4028
    do_mount fs/namespace.c:4041 [inline]
    __do_sys_mount fs/namespace.c:4229 [inline]
    __se_sys_mount fs/namespace.c:4206 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4206
    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 0xffff8881287f9c00 (size 512):
  comm "syz.0.19", pid 6079, jiffies 4294944864
  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 aaf4239b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4983 [inline]
    slab_alloc_node mm/slub.c:5288 [inline]
    __kmalloc_cache_noprof+0x3a6/0x5b0 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    hfsplus_init_fs_context+0x26/0x90 fs/hfsplus/super.c:678
    alloc_fs_context+0x214/0x430 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3698 [inline]
    path_mount+0x93c/0x12e0 fs/namespace.c:4028
    do_mount fs/namespace.c:4041 [inline]
    __do_sys_mount fs/namespace.c:4229 [inline]
    __se_sys_mount fs/namespace.c:4206 [inline]
    __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4206
    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

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/01 05:32 upstream e69c7c175115 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-leak memory leak in hfsplus_init_fs_context
* Struck through repros no longer work on HEAD.