general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 8598 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:do_misc_fixups kernel/bpf/verifier.c:19610 [inline] RIP: 0010:bpf_check+0xa19b/0x190c0 kernel/bpf/verifier.c:21295 Code: 48 c1 e8 03 80 3c 08 00 74 12 48 89 df e8 3d 9a 50 00 48 b9 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 e3 4c 00 00 8b 1b be 00 00 04 00 21 de 31 RSP: 0018:ffffc90009d1f1e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: dffffc0000000000 RDX: ffff888062db0000 RSI: 0000000000010000 RDI: 0000000000000001 RBP: ffffc90009d1fb50 R08: ffffffff81a7aee8 R09: ffffffff81a7b125 R10: 0000000000000004 R11: ffff888062db0000 R12: ffffc90009d1105a R13: 1ffff920013a220b R14: 1ffff920013a220b R15: 0000000000010000 FS: 00007f20b1bff6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000006ab08000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2895 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5631 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f20b287dda9 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:00007f20b1bff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f20b29abf80 RCX: 00007f20b287dda9 RDX: 0000000000000090 RSI: 0000000020000340 RDI: 0000000000000005 RBP: 00007f20b28ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f20b29abf80 R15: 00007ffc8713b508 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_misc_fixups kernel/bpf/verifier.c:19610 [inline] RIP: 0010:bpf_check+0xa19b/0x190c0 kernel/bpf/verifier.c:21295 Code: 48 c1 e8 03 80 3c 08 00 74 12 48 89 df e8 3d 9a 50 00 48 b9 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 e3 4c 00 00 8b 1b be 00 00 04 00 21 de 31 RSP: 0018:ffffc90009d1f1e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: dffffc0000000000 RDX: ffff888062db0000 RSI: 0000000000010000 RDI: 0000000000000001 RBP: ffffc90009d1fb50 R08: ffffffff81a7aee8 R09: ffffffff81a7b125 R10: 0000000000000004 R11: ffff888062db0000 R12: ffffc90009d1105a R13: 1ffff920013a220b R14: 1ffff920013a220b R15: 0000000000010000 FS: 00007f20b1bff6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c23000 CR3: 000000006ab08000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 8: 74 12 je 0x1c a: 48 89 df mov %rbx,%rdi d: e8 3d 9a 50 00 call 0x509a4f 12: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 19: fc ff df 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 30 add $0x30,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 e3 4c 00 00 jne 0x4d19 36: 8b 1b mov (%rbx),%ebx 38: be 00 00 04 00 mov $0x40000,%esi 3d: 21 de and %ebx,%esi 3f: 31 .byte 0x31