memory leak in autofs_new_ino

Status: upstream: reported C repro on 2026/09/02 16:33
Subsystems: autofs
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+df1db6e034b3953e19f5@syzkaller.appspotmail.com
First crash: 16d, last: 9h27m
▶ ▼ ✨ AI Patch Versions (1)
Version Stage Reported Report Link Job
1 moderation 2026/09/02 18:55 Discussion fb78862e-8c53-4157-80dc-3813ad0b70f3
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
fb78862e patching ❓ memory leak in autofs_new_ino 2026/09/02 16:33 2026/09/02 16:34 2026/09/02 18:55 9941e97d
1dfb6237 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ memory leak in autofs_new_ino 2026/08/18 00:00 2026/08/18 00:00 2026/08/18 00:50 1e72964b
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [autofs?] memory leak in autofs_new_ino 0 (1) 2026/09/02 16:33
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2026/09/02 17:35 26m retest repro upstream report job log log
2026/09/02 17:35 14m retest repro upstream report job log log

Sample crash report:
BUG: memory leak
unreferenced object 0xffff8881146ebc00 (size 192):
  comm "syz.0.20", pid 5969, jiffies 4294943196
  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 55e8e63e):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4597 [inline]
    slab_alloc_node mm/slub.c:4917 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
    _kmalloc_noprof include/linux/slab.h:988 [inline]
    _kzalloc_noprof include/linux/slab.h:1309 [inline]
    autofs_new_ino+0x24/0x80 fs/autofs/inode.c:16
    autofs_fill_super+0x66/0x1d0 fs/autofs/inode.c:321
    vfs_get_super fs/super.c:1273 [inline]
    get_tree_nodev+0x91/0xf0 fs/super.c:1292
    autofs_get_tree+0xbc/0x120 fs/autofs/inode.c:378
    vfs_get_tree+0x30/0x120 fs/super.c:1700
    vfs_cmd_create+0x7d/0x120 fs/fsopen.c:231
    vfs_fsconfig_locked fs/fsopen.c:295 [inline]
    __do_sys_fsconfig+0x492/0x9e0 fs/fsopen.c:463
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

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

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/18 00:10 upstream 8d3ae59288f1 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in autofs_new_ino
2026/08/17 23:37 upstream 8d3ae59288f1 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in autofs_new_ino
* Struck through repros no longer work on HEAD.