Hello, syzbot found the following issue on: HEAD commit: 74293ea1c4db net: sysfs: Do not create sysfs for non BQL d.. git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13dcc4b4180000 kernel config: https://syzkaller.appspot.com/x/.config?x=970c7b6c80a096da dashboard link: https://syzkaller.appspot.com/bug?extid=0c35af046fa98c893c84 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=10f38cf8180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136d41c2180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9bca2f6e074e/disk-74293ea1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/611a08387d8f/vmlinux-74293ea1.xz kernel image: https://storage.googleapis.com/syzbot-assets/78c388071345/bzImage-74293ea1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0c35af046fa98c893c84@xxxxxxxxxxxxxxxxxxxxxxxxx usercopy: Kernel memory exposure attempt detected from null address (offset 0, size 4)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 5070 Comm: syz-executor201 Not tainted 6.8.0-rc4-syzkaller-01053-g74293ea1c4db #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 40 db b7 8b 48 0f 44 de 48 c7 c7 e0 d9 b7 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 01 c5 60 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003a3fc50 EFLAGS: 00010296 RAX: 0000000000000057 RBX: ffffffff8bb7db20 RCX: b071ef5fcc834300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffff81753e6c R09: 1ffff92000747f28 R10: dffffc0000000000 R11: fffff52000747f29 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555f8e380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001480 CR3: 000000001f404000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __check_object_size+0x601/0xa00 check_object_size include/linux/thread_info.h:215 [inline] check_copy_size include/linux/thread_info.h:251 [inline] copy_to_user include/linux/uaccess.h:190 [inline] raw_getsockopt+0x37a/0x490 net/can/raw.c:852 do_sock_getsockopt+0x373/0x850 net/socket.c:2373 __sys_getsockopt+0x270/0x330 net/socket.c:2402 __do_sys_getsockopt net/socket.c:2412 [inline] __se_sys_getsockopt net/socket.c:2409 [inline] __x64_sys_getsockopt+0xb5/0xd0 net/socket.c:2409 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f21bfe782a9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcdfc8f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffcdfc8f208 RCX: 00007f21bfe782a9 RDX: 0000000000000008 RSI: 0000000000000065 RDI: 0000000000000003 RBP: 00007f21bfeeb610 R08: 0000000020001480 R09: 00007ffcdfc8f208 R10: 0000000020001440 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffcdfc8f1f8 R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 40 db b7 8b 48 0f 44 de 48 c7 c7 e0 d9 b7 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 01 c5 60 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003a3fc50 EFLAGS: 00010296 RAX: 0000000000000057 RBX: ffffffff8bb7db20 RCX: b071ef5fcc834300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffff81753e6c R09: 1ffff92000747f28 R10: dffffc0000000000 R11: fffff52000747f29 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555f8e380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001480 CR3: 000000001f404000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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
