================================================================== BUG: KASAN: vmalloc-out-of-bounds in memcmp+0x16f/0x1c0 lib/string.c:770 Read of size 8 at addr ffffffffa0010b00 by task syz-executor.3/15621 CPU: 1 PID: 15621 Comm: syz-executor.3 Not tainted 5.17.0-rc6-syzkaller-01939-gc344b9fc2108 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xf/0x336 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 memcmp+0x16f/0x1c0 lib/string.c:770 memcmp include/linux/fortify-string.h:269 [inline] __text_poke+0x5a2/0x8c0 arch/x86/kernel/alternative.c:1056 text_poke_copy+0x66/0xa0 arch/x86/kernel/alternative.c:1132 bpf_arch_text_copy+0x21/0x40 arch/x86/net/bpf_jit_comp.c:2429 bpf_jit_binary_pack_finalize+0x43/0x170 kernel/bpf/core.c:1099 bpf_int_jit_compile+0x9ea/0x1300 arch/x86/net/bpf_jit_comp.c:2386 bpf_prog_select_runtime+0x4d4/0x8a0 kernel/bpf/core.c:2167 bpf_prog_load+0xfe6/0x2250 kernel/bpf/syscall.c:2354 __sys_bpf+0x68a/0x59a0 kernel/bpf/syscall.c:4647 __do_sys_bpf kernel/bpf/syscall.c:4751 [inline] __se_sys_bpf kernel/bpf/syscall.c:4749 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4749 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe7d8c1d049 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe7d7571168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe7d8d30030 RCX: 00007fe7d8c1d049 RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0000000000000005 RBP: 00007fe7d8c7708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcafb7fa3f R14: 00007fe7d7571300 R15: 0000000000022000 Memory state around the buggy address: ffffffffa0010a00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffffffa0010a80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffffffa0010b00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffffffa0010b80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffffffa0010c00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================