loop9: detected capacity change from 0 to 1024 EXT4-fs: Ignoring removed nobh option EXT4-fs: Ignoring removed orlov option EXT4-fs (loop9): mounted filesystem without journal. Quota mode: none. general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 1608 Comm: syz.9.297 Not tainted 6.1.112-syzkaller-00109-gfadb08b36671 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:dev_map_generic_redirect+0x90/0x7d0 kernel/bpf/devmap.c:665 Code: f1 f1 00 f2 f2 f2 4b 89 04 26 43 c7 44 26 0f f3 f3 f3 f3 43 c6 44 26 13 f3 e8 cc e3 dd ff 48 89 d8 48 c1 e8 03 48 89 44 24 48 <42> 80 3c 20 00 74 08 48 89 df e8 71 4d 25 00 48 89 5c 24 18 4c 8b RSP: 0018:ffffc90000e876a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90000ee9000 RSI: 00000000000000bb RDI: 00000000000000bc RBP: ffffc90000e877f0 R08: ffffffff84142f7d R09: ffffffff84142e9b R10: 0000000000000004 R11: ffff8881136c9440 R12: dffffc0000000000 R13: ffff88813c9738c0 R14: 1ffff920001d0ee0 R15: dffffc0000000000 FS: 00007f856f5836c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000012cb06000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xdp_do_generic_redirect_map net/core/filter.c:4390 [inline] xdp_do_generic_redirect+0x42e/0xb40 net/core/filter.c:4449 do_xdp_generic+0x53e/0x800 net/core/dev.c:4958 tun_get_user+0x238a/0x3a90 drivers/net/tun.c:1920 tun_chr_write_iter+0x129/0x210 drivers/net/tun.c:2044 call_write_iter include/linux/fs.h:2274 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0xaf6/0xed0 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f856e77d1ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 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 1c 8e 02 00 48 RSP: 002b:00007f856f583000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f856e935f80 RCX: 00007f856e77d1ff RDX: 0000000000000d86 RSI: 0000000020001580 RDI: 00000000000000c8 RBP: 00007f856e7f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000d86 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f856e935f80 R15: 00007ffcf4278098 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_map_generic_redirect+0x90/0x7d0 kernel/bpf/devmap.c:665 Code: f1 f1 00 f2 f2 f2 4b 89 04 26 43 c7 44 26 0f f3 f3 f3 f3 43 c6 44 26 13 f3 e8 cc e3 dd ff 48 89 d8 48 c1 e8 03 48 89 44 24 48 <42> 80 3c 20 00 74 08 48 89 df e8 71 4d 25 00 48 89 5c 24 18 4c 8b RSP: 0018:ffffc90000e876a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90000ee9000 RSI: 00000000000000bb RDI: 00000000000000bc RBP: ffffc90000e877f0 R08: ffffffff84142f7d R09: ffffffff84142e9b R10: 0000000000000004 R11: ffff8881136c9440 R12: dffffc0000000000 R13: ffff88813c9738c0 R14: 1ffff920001d0ee0 R15: dffffc0000000000 FS: 00007f856f5836c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000012cb06000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f1 int1 1: f1 int1 2: 00 f2 add %dh,%dl 4: f2 f2 4b 89 04 26 repnz repnz mov %rax,(%r14,%r12,1) a: 43 c7 44 26 0f f3 f3 movl $0xf3f3f3f3,0xf(%r14,%r12,1) 11: f3 f3 13: 43 c6 44 26 13 f3 movb $0xf3,0x13(%r14,%r12,1) 19: e8 cc e3 dd ff call 0xffdde3ea 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 48 89 44 24 48 mov %rax,0x48(%rsp) * 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 71 4d 25 00 call 0x254daa 39: 48 89 5c 24 18 mov %rbx,0x18(%rsp) 3e: 4c rex.WR 3f: 8b .byte 0x8b