------------[ 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: 5225 Comm: syz-executor121 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285 #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_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7a 26 b9 f5 48 89 df e8 52 69 ba f5 e8 0d 3c e4 f5 fb bf 01 00 00 00 22 35 ac f5 65 8b 05 63 2b 4d 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc9000347fd48 EFLAGS: 00000286 RAX: 5dae3de087a45100 RBX: ffff88801cb39bc0 RCX: ffffffff94ce1903 RDX: dffffc0000000000 RSI: ffffffff8bead5a0 RDI: 0000000000000001 RBP: ffff88807dd45f70 R08: ffffffff8ff66fef R09: 1ffffffff1fecdfd R10: dffffc0000000000 R11: fffffbfff1fecdfe R12: 1ffff1100fba8c63 R13: ffff88807dd45a00 R14: ffff88807dd46318 R15: 1ffff1100fba8b46 spin_unlock_irq include/linux/spinlock.h:401 [inline] ptrace_stop+0x414/0x930 kernel/signal.c:2306 ptrace_do_notify kernel/signal.c:2393 [inline] ptrace_notify+0x255/0x380 kernel/signal.c:2405 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_entry include/linux/ptrace.h:452 [inline] syscall_trace_enter+0x5d/0x150 kernel/entry/common.c:45 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f046182f020 Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d 81 e0 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c RSP: 002b:00007fff7440f158 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f046182f020 RDX: ffffffffffffffb8 RSI: 0000000020000100 RDI: 000000000000001d RBP: 00007fff7440f1a0 R08: 00007fff7440f180 R09: 00007fff7440f180 R10: 00007fff7440f180 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---[ end trace ]--- ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 53 push %rbx 6: 48 89 fb mov %rdi,%rbx 9: 48 83 c7 18 add $0x18,%rdi d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 12: e8 7a 26 b9 f5 call 0xf5b92691 17: 48 89 df mov %rbx,%rdi 1a: e8 52 69 ba f5 call 0xf5ba6971 1f: e8 0d 3c e4 f5 call 0xf5e43c31 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 22 35 ac f5 call 0xf5ac3551 <-- trapping instruction 2f: 65 8b 05 63 2b 4d 74 mov %gs:0x744d2b63(%rip),%eax # 0x744d2b99 36: 85 c0 test %eax,%eax 38: 74 06 je 0x40 3a: 5b pop %rbx 3b: c3 ret 3c: cc int3 3d: cc int3 3e: cc int3 3f: cc int3