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BUG: KMSAN: uninit-value in arch_stack_walk+0x1ad/0x3c0 arch/x86/kernel/stacktrace.c:21
 arch_stack_walk+0x1ad/0x3c0 arch/x86/kernel/stacktrace.c:21
 stack_trace_save+0x43/0x60 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline]
 kmsan_internal_chain_origin+0xa9/0x110 mm/kmsan/core.c:253
 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:164
 __msan_memcpy+0x65/0x90 mm/kmsan/instrumentation.c:145
 sock_write_iter+0x605/0x690 net/socket.c:1062
 call_write_iter include/linux/fs.h:2074 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0x1318/0x2030 fs/read_write.c:590
 ksys_write+0x28b/0x510 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable regs created at:
 __bpf_prog_run32+0x84/0x180 kernel/bpf/core.c:1796
 bpf_dispatcher_nop_func include/linux/bpf.h:784 [inline]
 __bpf_prog_run include/linux/filter.h:626 [inline]
 bpf_prog_run include/linux/filter.h:633 [inline]
 __bpf_prog_run_save_cb+0x168/0x580 include/linux/filter.h:756

CPU: 1 PID: 31552 Comm: syz-executor.0 Tainted: G        W         5.17.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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