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BUG: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x82/0xa00 kernel/entry/common.c:164
 sysvec_call_function_single+0x4f/0x90 arch/x86/kernel/smp.c:267
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 key_notify_policy net/key/af_key.c:-1 [inline]
 pfkey_send_policy_notify+0xbcf/0x12b0 net/key/af_key.c:3128
 km_policy_notify+0xc9/0x1a0 net/xfrm/xfrm_state.c:2743
 pfkey_spdadd+0x1bed/0x21d0 net/key/af_key.c:2367
 pfkey_process net/key/af_key.c:2864 [inline]
 pfkey_sendmsg+0x1bd6/0x1d10 net/key/af_key.c:3720
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0xf37/0xfd0 net/socket.c:2699
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2753
 __sys_sendmsg net/socket.c:2785 [inline]
 __do_sys_sendmsg net/socket.c:2790 [inline]
 __se_sys_sendmsg net/socket.c:2788 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2788
 x64_sys_call+0x1e20/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable c created at:
 pfkey_spdadd+0x6e/0x21d0 net/key/af_key.c:2270
 pfkey_process net/key/af_key.c:2864 [inline]
 pfkey_sendmsg+0x1bd6/0x1d10 net/key/af_key.c:3720

CPU: 0 UID: 0 PID: 16382 Comm: syz.2.4955 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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