===================================================== BUG: KMSAN: uninit-value in stack_trace_consume_entry+0x164/0x300 kernel/stacktrace.c:89 stack_trace_consume_entry+0x164/0x300 kernel/stacktrace.c:89 arch_stack_walk+0x2f9/0x3c0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163 __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:2050 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x119f/0x1e80 fs/read_write.c:591 ksys_write+0x28b/0x510 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:653 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was stored to memory at: stack_trace_consume_entry+0x27e/0x300 kernel/stacktrace.c:90 arch_stack_walk+0x2f9/0x3c0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163 __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:2050 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x119f/0x1e80 fs/read_write.c:591 ksys_write+0x28b/0x510 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:653 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was stored to memory at: stack_trace_save+0x193/0x1a0 kernel/stacktrace.c:116 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163 __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:2050 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x119f/0x1e80 fs/read_write.c:591 ksys_write+0x28b/0x510 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:653 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x51/0xa0 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:2073 bpf_dispatcher_nop_func include/linux/bpf.h:804 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2022 [inline] bpf_trace_run2+0x129/0x380 kernel/trace/bpf_trace.c:2059 CPU: 0 PID: 3474 Comm: syz-fuzzer Tainted: G W 5.18.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================