Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5850 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:114 [inline] RIP: 0010:__pcpu_freelist_pop+0x6b7/0x8c0 kernel/bpf/percpu_freelist.c:125 Code: 10 48 3b 8c 24 80 00 00 00 0f 85 b4 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 81 3a 9a 09 cc 48 89 f8 48 c1 e8 03 <80> 3c 18 00 48 89 7c 24 20 74 0a e8 69 3f 41 00 48 8b 7c 24 20 48 RSP: 0018:ffffc90003fdf000 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffe8ffffc3a218 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc90003fdf0d0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff520007fbe0c R12: 1ffffd1ffff87442 R13: ffffe8ffffc3a210 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555563b1a500(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 00000000269dc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pcpu_freelist_pop+0xca/0x170 kernel/bpf/percpu_freelist.c:134 __bpf_get_stackid+0x574/0xcf0 kernel/bpf/stackmap.c:259 ____bpf_get_stackid_raw_tp kernel/trace/bpf_trace.c:1810 [inline] bpf_get_stackid_raw_tp+0x196/0x210 kernel/trace/bpf_trace.c:1799 bpf_prog_12712c88fd19bd5b+0x2a/0x32 bpf_dispatcher_nop_func include/linux/bpf.h:1335 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline] bpf_trace_run4+0x28b/0x4a0 kernel/trace/bpf_trace.c:2300 __do_trace_mm_page_alloc include/trace/events/kmem.h:177 [inline] trace_mm_page_alloc+0x129/0x150 include/trace/events/kmem.h:177 __alloc_frozen_pages_noprof+0x1d6/0x370 mm/page_alloc.c:5170 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 get_free_pages_noprof+0xf/0x80 mm/page_alloc.c:5207 poll_get_entry fs/select.c:168 [inline] __pollwait+0x27b/0x460 fs/select.c:223 poll_wait include/linux/poll.h:45 [inline] pipe_poll+0xdd/0x470 fs/pipe.c:674 vfs_poll include/linux/poll.h:82 [inline] select_poll_one fs/select.c:480 [inline] do_select+0x105b/0x17e0 fs/select.c:536 core_sys_select+0x6dd/0xa20 fs/select.c:677 do_pselect fs/select.c:759 [inline] __do_sys_pselect6 fs/select.c:802 [inline] __se_sys_pselect6+0x27a/0x300 fs/select.c:793 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5479b8e9ac Code: 29 44 24 30 80 3d cb 9b 1f 00 00 4c 89 4c 24 40 4c 8d 4c 24 40 48 c7 44 24 48 08 00 00 00 74 2e 4c 89 ea b8 0e 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7c 48 8b 54 24 58 64 48 2b 14 25 28 00 00 00 RSP: 002b:00007fffe78b8d50 EFLAGS: 00000202 ORIG_RAX: 000000000000010e RAX: ffffffffffffffda RBX: 00007fffe78b8e80 RCX: 00007f5479b8e9ac RDX: 0000000000000000 RSI: 00007fffe78b8e80 RDI: 0000000000000023 RBP: 00007fffe78b90c0 R08: 00007fffe78b8d80 R09: 00007fffe78b8d90 R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffe78b9120 R13: 0000000000000000 R14: 00007fffe78b92d0 R15: 00007fffe78b8f10 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:114 [inline] RIP: 0010:__pcpu_freelist_pop+0x6b7/0x8c0 kernel/bpf/percpu_freelist.c:125 Code: 10 48 3b 8c 24 80 00 00 00 0f 85 b4 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 81 3a 9a 09 cc 48 89 f8 48 c1 e8 03 <80> 3c 18 00 48 89 7c 24 20 74 0a e8 69 3f 41 00 48 8b 7c 24 20 48 RSP: 0018:ffffc90003fdf000 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffe8ffffc3a218 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc90003fdf0d0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff520007fbe0c R12: 1ffffd1ffff87442 R13: ffffe8ffffc3a210 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555563b1a500(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000003 CR3: 00000000269dc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 10 48 3b adc %cl,0x3b(%rax) 3: 8c 24 80 mov %fs,(%rax,%rax,4) 6: 00 00 add %al,(%rax) 8: 00 0f add %cl,(%rdi) a: 85 b4 01 00 00 48 8d test %esi,-0x72b80000(%rcx,%rax,1) 11: 65 d8 5b 41 fcomps %gs:0x41(%rbx) 15: 5c pop %rsp 16: 41 5d pop %r13 18: 41 5e pop %r14 1a: 41 5f pop %r15 1c: 5d pop %rbp 1d: e9 81 3a 9a 09 jmp 0x99a3aa3 22: cc int3 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 48 89 7c 24 20 mov %rdi,0x20(%rsp) 33: 74 0a je 0x3f 35: e8 69 3f 41 00 call 0x413fa3 3a: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 3f: 48 rex.W