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AHgh+RrJiJ36F0DYiTzBovkoMjqq5y0EnGWIs3U3wKxheknYoxr0SdIG8bsbME0mFtYiY78p409Kee1pOF0=@vger.kernel.org X-Gm-Message-State: AOJu0YxVmEmB4AZoVxVC77XamclgyeWAvJLixhTZcU4ZOYAQpy6H7kEh UtGYdm5HoYLgPlnaqLld+RoxxONZ74DRFKl5JOG0RbQOLMkyNCRl7trKr2SejCXT77/13ncQw6K Jz4TdSdHJ8y2M3mr7zS13YLAKh+sOdFU8oY5lSfXkkaqrTK3jIHZl50oxzgk= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:15a9:b0:4ae:f5be:fe29 with SMTP id 5614622812f47-4af5e0519c0mr1571762b6e.5.1785518130873; Fri, 31 Jul 2026 10:15:30 -0700 (PDT) Date: Fri, 31 Jul 2026 10:15:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6cd832.1aa927e4.17d4bf.0009.GAE@google.com> Subject: [syzbot] [usb?] memory leak in uvcg_extension_ba_source_id_store From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13b5b03e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba7c2d1679fb08a2 dashboard link: https://syzkaller.appspot.com/bug?extid=54927260acba030187a6 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12985499580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ab649e580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b677b453b580/disk-11028ab6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/eec6e520d498/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/03c59bb4309c/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+54927260acba030187a6@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff88810ddbd588 (size 8): comm "syz.1.37", pid 6113, jiffies 4294948281 hex dump (first 8 bytes): 01 00 00 00 00 00 00 00 ........ backtrace (crc ccaa009e): 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] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x3bf/0x550 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] _kmalloc_array_noprof include/linux/slab.h:1208 [inline] uvcg_extension_ba_source_id_store+0xee/0x180 drivers/usb/gadget/function/uvc_configfs.c:1058 flush_write_buffer fs/configfs/file.c:207 [inline] configfs_write_iter+0x10d/0x1a0 fs/configfs/file.c:229 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x3ac/0x720 fs/read_write.c:687 ksys_write+0xa5/0x170 fs/read_write.c:739 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 --- 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. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. 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) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup