syzbot has found a reproducer for the following issue on: HEAD commit: 88fac17500f4 Merge tag 'fuse-fixes-6.11-rc7' of git://git... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=12281339980000 kernel config: https://syzkaller.appspot.com/x/.config?x=35c699864e165c51 dashboard link: https://syzkaller.appspot.com/bug?extid=9d34f80f841e948c3fdb 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=1702531f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150dd8af980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6e5a9ba13ba0/disk-88fac175.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/229238ec073e/vmlinux-88fac175.xz kernel image: https://storage.googleapis.com/syzbot-assets/64327bdcda24/bzImage-88fac175.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9d34f80f841e948c3fdb@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x597/0x2350 drivers/usb/core/urb.c:430 usb_submit_urb+0x597/0x2350 drivers/usb/core/urb.c:430 usbtmc_write+0xc32/0x1220 drivers/usb/class/usbtmc.c:1606 vfs_write+0x493/0x1550 fs/read_write.c:588 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:652 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2 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:3994 [inline] slab_alloc_node mm/slub.c:4037 [inline] __kmalloc_cache_noprof+0x4f0/0xb00 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:681 [inline] usbtmc_create_urb drivers/usb/class/usbtmc.c:757 [inline] usbtmc_write+0x3d3/0x1220 drivers/usb/class/usbtmc.c:1547 vfs_write+0x493/0x1550 fs/read_write.c:588 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:652 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2 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 Byte 15 of 16 is uninitialized Memory access of size 16 starts at ffff88810bce7000 CPU: 0 UID: 0 PID: 5229 Comm: syz-executor195 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ===================================================== --- 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.
