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BUG: KMSAN: uninit-value in tcp_parse_options+0x1006/0x1de0 net/ipv4/tcp_input.c:4200
 tcp_parse_options+0x1006/0x1de0 net/ipv4/tcp_input.c:4200
 tcp_fast_parse_options net/ipv4/tcp_input.c:4352 [inline]
 tcp_validate_incoming+0x432/0x30c0 net/ipv4/tcp_input.c:5952
 tcp_rcv_state_process+0x8ca/0x4c10 net/ipv4/tcp_input.c:6801
 tcp_v4_do_rcv+0xbf9/0x11a0 net/ipv4/tcp_ipv4.c:1938
 tcp_v4_rcv+0x51df/0x5750 net/ipv4/tcp_ipv4.c:2350
 ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core net/core/dev.c:5666 [inline]
 __netif_receive_skb+0x319/0xa00 net/core/dev.c:5779
 process_backlog+0x4ad/0xa50 net/core/dev.c:6111
 __napi_poll+0xe7/0x980 net/core/dev.c:6775
 napi_poll net/core/dev.c:6844 [inline]
 net_rx_action+0xa5a/0x19b0 net/core/dev.c:6966
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:554
 run_ksoftirqd+0x29/0x50 kernel/softirq.c:927
 smpboot_thread_fn+0x555/0xa60 kernel/smpboot.c:164
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4091 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587
 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678
 alloc_skb include/linux/skbuff.h:1322 [inline]
 tcp_xmit_probe_skb net/ipv4/tcp_output.c:4294 [inline]
 tcp_write_wakeup+0xa2c/0x1270 net/ipv4/tcp_output.c:4360
 tcp_send_probe0+0x5a/0x590 net/ipv4/tcp_output.c:4375
 tcp_probe_timer net/ipv4/tcp_timer.c:423 [inline]
 tcp_write_timer_handler+0x70a/0xbd0 net/ipv4/tcp_timer.c:709
 tcp_write_timer+0xef/0x260 net/ipv4/tcp_timer.c:722
 call_timer_fn+0x49/0x580 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1845 [inline]
 __run_timers kernel/time/timer.c:2419 [inline]
 __run_timer_base+0x84e/0xe90 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2449
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0x68/0x120 kernel/softirq.c:637
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702

CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc4-syzkaller-00261-g850925a8133c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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