Hello, syzbot found the following issue on: HEAD commit: 55cb5f43689d Merge tag 'trace-v6.7-rc6' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1275e59ee80000 kernel config: https://syzkaller.appspot.com/x/.config?x=4a65fa9f077ead01 dashboard link: https://syzkaller.appspot.com/bug?extid=853242d9c9917165d791 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ab88d88fa1d1/disk-55cb5f43.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/587fd1186192/vmlinux-55cb5f43.xz kernel image: https://storage.googleapis.com/syzbot-assets/c7bbb5741191/bzImage-55cb5f43.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+853242d9c9917165d791@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in ___bpf_prog_run+0x8a26/0xdb80 kernel/bpf/core.c:2037 ___bpf_prog_run+0x8a26/0xdb80 kernel/bpf/core.c:2037 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2203 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1045 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4040 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5401 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline] __se_sys_bpf kernel/bpf/syscall.c:5485 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5485 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was stored to memory at: ___bpf_prog_run+0x8567/0xdb80 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2203 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1045 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4040 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5401 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline] __se_sys_bpf kernel/bpf/syscall.c:5485 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5485 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Local variable stack created at: __bpf_prog_run512+0x45/0xe0 kernel/bpf/core.c:2203 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423 CPU: 1 PID: 13775 Comm: syz-executor.3 Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== --- 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 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
