memory leak in fscrypt_setup_filename

Status: fixed on 2026/05/21 07:49
Subsystems: fscrypt f2fs
[Documentation on labels]
Reported-by: syzbot+cf7946ab25b21abc4b66@syzkaller.appspotmail.com
Fix commit: 3cf11e6f36c1 f2fs: fix to avoid memory leak in f2fs_rename()
First crash: 143d, last: 143d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
059aa654-78d0-4f6a-8d80-1260bb7af0bb assessment-security 💥 memory leak in fscrypt_setup_filename 2026/05/14 11:13 2026/05/14 11:13 2026/05/14 11:14 6ccb967e465e832a7bfd7a116ad00d52a0923a5d 
failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128
From /app/workdir/repo/linux
 * branch                HEAD       -> FETCH_HEAD
Updating files:  ...
truncated to first 200 bytes; open job for full error
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] f2fs: fix to avoid memory leak in f2fs_rename() 2 (2) 2026/03/05 19:10
[syzbot] [fscrypt?] [f2fs?] memory leak in fscrypt_setup_filename 3 (5) 2026/03/04 08:17
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/03/04 07:37 38m chao@kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot OK log

Sample crash report:
BUG: memory leak
unreferenced object 0xffff888127f70830 (size 16):
  comm "syz.0.23", pid 6144, jiffies 4294943712
  hex dump (first 16 bytes):
    3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff  <.Wr[...n..3B9..
  backtrace (crc 925f8a80):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4520 [inline]
    slab_alloc_node mm/slub.c:4844 [inline]
    __do_kmalloc_node mm/slub.c:5237 [inline]
    __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250
    kmalloc_noprof include/linux/slab.h:954 [inline]
    fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364
    f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143
    f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961
    f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308
    vfs_rename+0x7ff/0x1250 fs/namei.c:6026
    filename_renameat2+0x4f4/0x660 fs/namei.c:6144
    __do_sys_renameat2 fs/namei.c:6173 [inline]
    __se_sys_renameat2 fs/namei.c:6168 [inline]
    __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xe2/0xf80 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
2026/03/03 10:47 upstream af4e9ef3d784 28b83e23 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-leak memory leak in fscrypt_setup_filename
* Struck through repros no longer work on HEAD.