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charset="utf-8" Content-ID: <273245223423364F8EDB943464B2CD61@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [syzbot] [hfs?] memory leak in hfs_init_fs_context X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-13_05,2025-11-13_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 adultscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=2 engine=8.19.0-2510240000 definitions=main-2511080099 Issue has been created: https://github.com/hfs-linux-kernel/hfs-linux-kernel/issues/239 Thanks, Slava. On Wed, 2025-11-12 at 20:27 -0800, syzbot wrote: > Hello, >=20 > syzbot found the following issue on: >=20 > HEAD commit: 4ea7c1717f3f Merge tag 'for-linus' of git://git.kernel.or= g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=3D17346c1258000= 0 =20 > kernel config: https://syzkaller.appspot.com/x/.config?x=3Dcb128cd5cb439= 809 =20 > dashboard link: https://syzkaller.appspot.com/bug?extid=3Dad45f827c88778f= f7df6 =20 > compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binuti= ls for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D143f5c12580= 000 =20 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D17c9a7cd98000= 0 =20 >=20 > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/1f8cf51c9042/dis= k-4ea7c171.raw.xz =20 > vmlinux: https://storage.googleapis.com/syzbot-assets/6f227246b5b7/vmlinu= x-4ea7c171.xz =20 > kernel image: https://storage.googleapis.com/syzbot-assets/f935766a00b3/b= zImage-4ea7c171.xz =20 > mounted in repro: https://storage.googleapis.com/syzbot-assets/bee9311f40= 26/mount_4.gz =20 >=20 > IMPORTANT: if you fix the issue, please add the following tag to the comm= it: > Reported-by: syzbot+ad45f827c88778ff7df6@syzkaller.appspotmail.com >=20 > 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 >=20 > 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 >=20 > 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 >=20 > 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 >=20 > 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 >=20 > connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF >=20 >=20 > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. >=20 > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. >=20 > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title >=20 > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. >=20 > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) >=20 > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report >=20 > If you want to undo deduplication, reply with: > #syz undup --=20 Viacheslav Dubeyko