syzbot

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000006
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000110b71000
[0000000000000000] pgd=080000010c304003, p4d=080000010c304003, pud=0800000115d72003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4959 Comm: syz.2.94 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400805 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=-c)
pc : 0x0
lr : bond_xdp_xmit+0x27c/0x45c drivers/net/bonding/bond_main.c:5588
sp : ffff800021a27020
x29: ffff800021a270e0 x28: 000000000000000f x27: ffff800021a27048
x26: dfff800000000000 x25: ffff800012b40ef8 x24: ffff0000d947c000
x23: fffffbffeff95010 x22: ffff0000f24ec000 x21: fffffbffeff95010
x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011abbcc0
x17: ffff8000181f8000 x16: ffff8000082d0e30 x15: 0000000000000002
x14: 0000000000000001 x13: 0000000000ff0100 x12: 0000000000080000
x11: 0000000000025055 x10: ffff800029a8e000 x9 : ffff800021a27080
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000008 x3 : 0000000000000000
x2 : ffff800021a270a0 x1 : 0000000000000001 x0 : ffff0000d947c000
Call trace:
 0x0
 bq_xmit_all+0xab0/0xf10 kernel/bpf/devmap.c:392
 bq_enqueue+0x288/0x30c kernel/bpf/devmap.c:457
 dev_map_enqueue_multi+0xc30/0xd8c kernel/bpf/devmap.c:656
 __xdp_do_redirect_frame net/core/filter.c:4327 [inline]
 xdp_do_redirect_frame+0x3e4/0x578 net/core/filter.c:4392
 xdp_test_run_batch net/bpf/test_run.c:314 [inline]
 bpf_test_run_xdp_live+0x840/0x1544 net/bpf/test_run.c:362
 bpf_prog_test_run_xdp+0x560/0xb88 net/bpf/test_run.c:1390
 bpf_prog_test_run+0x2dc/0x364 kernel/bpf/syscall.c:3692
 __sys_bpf+0x4ec/0x634 kernel/bpf/syscall.c:5045
 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
 __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:5129
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: bad PC value
---[ end trace 0000000000000000 ]---