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BUG: KASAN: vmalloc-out-of-bounds in memcmp+0x16f/0x1c0 lib/string.c:770
Read of size 8 at addr ffffffffa0606380 by task syz-executor.1/6412

CPU: 1 PID: 6412 Comm: syz-executor.1 Not tainted 5.18.0-rc1-syzkaller-14436-ge1a34e19ea96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __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/0x495 mm/kasan/report.c:313
 print_report mm/kasan/report.c:429 [inline]
 kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491
 memcmp+0x16f/0x1c0 lib/string.c:770
 memcmp include/linux/fortify-string.h:404 [inline]
 __text_poke+0x5a2/0x8c0 arch/x86/kernel/alternative.c:1094
 text_poke_copy+0x66/0xa0 arch/x86/kernel/alternative.c:1170
 bpf_arch_text_copy+0x21/0x40 arch/x86/net/bpf_jit_comp.c:2458
 bpf_jit_binary_pack_finalize+0x44/0x110 kernel/bpf/core.c:1140
 bpf_int_jit_compile+0xa74/0x13e0 arch/x86/net/bpf_jit_comp.c:2414
 bpf_prog_select_runtime+0x2da/0x4b0 kernel/bpf/core.c:2208
 bpf_prog_load+0xfe6/0x2250 kernel/bpf/syscall.c:2355
 __sys_bpf+0x674/0x55d0 kernel/bpf/syscall.c:4663
 __do_sys_bpf kernel/bpf/syscall.c:4767 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4765 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4765
 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: 0033:0x7fb4c40890e9
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:00007fb4c5138168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb4c419bf60 RCX: 00007fb4c40890e9
RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 00007fb4c40e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee0b8d3cf R14: 00007fb4c5138300 R15: 0000000000022000
 </TASK>

Memory state around the buggy address:
 ffffffffa0606280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffffffa0606300: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffffffa0606380: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffffffa0606400: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffffffa0606480: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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