------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ./kernel/bpf/devmap.c:385:28 index 16 is out of range for type 'struct xdp_frame *[16]' CPU: 0 UID: 0 PID: 6122 Comm: syz.3.253 Not tainted 6.11.0-rc1-syzkaller-00063-g21b136cc63d2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429 bq_xmit_all+0x157/0x11d0 kernel/bpf/devmap.c:385 __dev_flush+0x81/0x160 kernel/bpf/devmap.c:425 xdp_do_check_flushed+0x129/0x240 net/core/filter.c:4307 __napi_poll+0xe4/0x490 net/core/dev.c:6774 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 common_interrupt+0xaa/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 8e 9f 40 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 83 05 ac f5 65 8b 05 d4 fc 4c 74 85 c0 74 43 48 c7 04 24 0e 36 RSP: 0018:ffffc90017a979c0 EFLAGS: 00000206 RAX: 222eebe051177200 RBX: 1ffff92002f52f3c RCX: ffffffff94ce3903 RDX: dffffc0000000000 RSI: ffffffff8bead560 RDI: 0000000000000001 RBP: ffffc90017a97a50 R08: ffffffff8ff678af R09: 1ffffffff1fecf15 R10: dffffc0000000000 R11: fffffbfff1fecf16 R12: dffffc0000000000 R13: 1ffff92002f52f38 R14: ffffc90017a979e0 R15: 0000000000000246 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:551 [inline] try_to_wake_up+0x8fb/0x1470 kernel/sched/core.c:4051 wake_up_process kernel/sched/core.c:4299 [inline] wake_up_q+0xc8/0x120 kernel/sched/core.c:1029 futex_wake+0x523/0x5c0 kernel/futex/waitwake.c:199 do_futex+0x392/0x560 kernel/futex/syscalls.c:107 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe769f773b9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe76acd90f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fe76a105f88 RCX: 00007fe769f773b9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fe76a105f8c RBP: 00007fe76a105f80 R08: 7fffffffffffffff R09: 00007fe76acd96c0 R10: 0000000000000e80 R11: 0000000000000246 R12: 00007fe76a105f8c R13: 000000000000000b R14: 00007fff5ac303a0 R15: 00007fff5ac30488 ---[ end trace ]--- ---------------- Code disassembly (best guess): 0: 9c pushf 1: 8f 44 24 20 pop 0x20(%rsp) 5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1) a: 74 08 je 0x14 c: 4c 89 f7 mov %r14,%rdi f: e8 8e 9f 40 f6 call 0xf6409fa2 14: f6 44 24 21 02 testb $0x2,0x21(%rsp) 19: 75 52 jne 0x6d 1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 83 05 ac f5 call 0xf5ac05b2 <-- trapping instruction 2f: 65 8b 05 d4 fc 4c 74 mov %gs:0x744cfcd4(%rip),%eax # 0x744cfd0a 36: 85 c0 test %eax,%eax 38: 74 43 je 0x7d 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss