general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 9242 Comm: syz-executor.1 Not tainted 6.1.78-syzkaller-00009-g25216be1ac5e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:dev_map_enqueue+0x31/0x340 kernel/bpf/devmap.c:528 Code: 56 41 55 41 54 53 48 83 ec 18 48 89 55 c0 49 89 f7 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 c6 1f de ff 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 10 1d 25 00 4c 8b 33 48 83 c3 20 RSP: 0018:ffffc900060ff648 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90003abe000 RSI: 0000000000000108 RDI: 0000000000000109 RBP: ffffc900060ff688 R08: 0000000000000005 R09: ffffffff8411ded5 R10: 0000000000000004 R11: ffff8881122c5100 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8881f70364a0 R15: ffff88810c0e4070 FS: 00007f20022b56c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001359ca000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace ---------------- Code disassembly (best guess): 0: 56 push %rsi 1: 41 55 push %r13 3: 41 54 push %r12 5: 53 push %rbx 6: 48 83 ec 18 sub $0x18,%rsp a: 48 89 55 c0 mov %rdx,-0x40(%rbp) e: 49 89 f7 mov %rsi,%r15 11: 48 89 fb mov %rdi,%rbx 14: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 1b: fc ff df 1e: e8 c6 1f de ff call 0xffde1fe9 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 10 1d 25 00 call 0x251d49 39: 4c 8b 33 mov (%rbx),%r14 3c: 48 83 c3 20 add $0x20,%rbx