Hello, syzbot found the following issue on: HEAD commit: 2c9b3512402e Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1197b6b5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6bfb33a8ad10458f dashboard link: https://syzkaller.appspot.com/bug?extid=17ca2339e34a1d863aad compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1626b995980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1572eb21980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f8543636ba6c/disk-2c9b3512.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/403c612b7ac5/vmlinux-2c9b3512.xz kernel image: https://storage.googleapis.com/syzbot-assets/88dc686d170a/bzImage-2c9b3512.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+17ca2339e34a1d863aad@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:45 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x110 lib/usercopy.c:45 copy_to_user include/linux/uaccess.h:191 [inline] raw_ioctl_ep0_read drivers/usb/gadget/legacy/raw_gadget.c:786 [inline] raw_ioctl+0x3d2e/0x5440 drivers/usb/gadget/legacy/raw_gadget.c:1315 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:893 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:893 x64_sys_call+0x1a06/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:3985 [inline] slab_alloc_node mm/slub.c:4028 [inline] __do_kmalloc_node mm/slub.c:4148 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4161 kmalloc_noprof include/linux/slab.h:685 [inline] raw_alloc_io_data drivers/usb/gadget/legacy/raw_gadget.c:675 [inline] raw_ioctl_ep0_read drivers/usb/gadget/legacy/raw_gadget.c:778 [inline] raw_ioctl+0x3bcb/0x5440 drivers/usb/gadget/legacy/raw_gadget.c:1315 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:893 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:893 x64_sys_call+0x1a06/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Bytes 0-4095 of 4096 are uninitialized Memory access of size 4096 starts at ffff888116edb000 Data copied to user address 00007ffefdca74d8 CPU: 0 PID: 5057 Comm: syz-executor289 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ===================================================== --- 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@xxxxxxxxxxxxxxxx. 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
