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: 0 PID: 8450 Comm: syz-executor.2 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:ffffc9000343fc50 EFLAGS: 00010296 RAX: 0000000000000057 RBX: ffffffff8bb7db20 RCX: 7ded872591923700 RDX: ffffc90004939000 RSI: 000000000000254b RDI: 000000000000254c RBP: ffffffffffffffff R08: ffffffff81753e6c R09: 1ffff92000687f28 R10: dffffc0000000000 R11: fffff52000687f29 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fba10cfd6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000002be4e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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: 0033:0x7fba1007dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fba10cfd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fba101abf80 RCX: 00007fba1007dda9 RDX: 0000000000000008 RSI: 0000000000000065 RDI: 0000000000000003 RBP: 00007fba100ca47a R08: 0000000020000080 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fba101abf80 R15: 00007ffddb5e2dc8 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:ffffc9000343fc50 EFLAGS: 00010296 RAX: 0000000000000057 RBX: ffffffff8bb7db20 RCX: 7ded872591923700 RDX: ffffc90004939000 RSI: 000000000000254b RDI: 000000000000254c RBP: ffffffffffffffff R08: ffffffff81753e6c R09: 1ffff92000687f28 R10: dffffc0000000000 R11: fffff52000687f29 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fba10cfd6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc091430290 CR3: 000000002be4e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400