Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 14222 Comm: syz-executor.3 Not tainted 6.10.0-rc4-syzkaller-00330-g7c16f0a4ed1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:dev_map_generic_redirect+0xb9/0x5f0 kernel/bpf/devmap.c:681 Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 74 08 3c 03 0f 8e 50 04 00 00 48 89 ea 44 8b 73 70 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 89 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffffc90004b2f878 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: ffff88807b912500 RCX: ffffc9000db4b000 RDX: 0000000000000000 RSI: ffffffff81b46466 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 1ffff92000965f15 R14: 0000000000000d81 R15: 0000000000000000 FS: 00007fe6c3e8e6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca3a209440 CR3: 00000000606a4000 CR4: 0000000000350ef0 Call Trace: xdp_do_generic_redirect_map net/core/filter.c:4490 [inline] xdp_do_generic_redirect+0x309/0x720 net/core/filter.c:4549 do_xdp_generic+0x77f/0xc30 net/core/dev.c:5108 tun_get_user+0x1d36/0x3c30 drivers/net/tun.c:1924 tun_chr_write_iter+0xe8/0x210 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b9/0x1140 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe6c307bdef Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007fe6c3e8e090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe6c31b3f80 RCX: 00007fe6c307bdef RDX: 0000000000000d81 RSI: 0000000020001540 RDI: 00000000000000c8 RBP: 00007fe6c30ec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000d81 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe6c31b3f80 R15: 00007ffdc57985d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_map_generic_redirect+0xb9/0x5f0 kernel/bpf/devmap.c:681 Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 74 08 3c 03 0f 8e 50 04 00 00 48 89 ea 44 8b 73 70 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 89 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffffc90004b2f878 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: ffff88807b912500 RCX: ffffc9000db4b000 RDX: 0000000000000000 RSI: ffffffff81b46466 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 1ffff92000965f15 R14: 0000000000000d81 R15: 0000000000000000 FS: 00007fe6c3e8e6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca3a209440 CR3: 00000000606a4000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax 9: 84 c0 test %al,%al b: 74 08 je 0x15 d: 3c 03 cmp $0x3,%al f: 0f 8e 50 04 00 00 jle 0x465 15: 48 89 ea mov %rbp,%rdx 18: 44 8b 73 70 mov 0x70(%rbx),%r14d 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 89 04 00 00 jne 0x4bd 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 4c rex.WR 3f: 8b .byte 0x8b