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BUG: KMSAN: uninit-value in receive_mergeable drivers/net/virtio_net.c:1847 [inline]
BUG: KMSAN: uninit-value in receive_buf+0x2620/0x6070 drivers/net/virtio_net.c:1973
 receive_mergeable drivers/net/virtio_net.c:1847 [inline]
 receive_buf+0x2620/0x6070 drivers/net/virtio_net.c:1973
 virtnet_receive drivers/net/virtio_net.c:2277 [inline]
 virtnet_poll+0xd1c/0x23c0 drivers/net/virtio_net.c:2380
 __napi_poll+0xe7/0x980 net/core/dev.c:6722
 napi_poll net/core/dev.c:6791 [inline]
 net_rx_action+0x82a/0x1850 net/core/dev.c:6907
 handle_softirqs+0x1ce/0x800 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
 common_interrupt+0x94/0xa0 arch/x86/kernel/irq.c:278
 asm_common_interrupt+0x2b/0x40 arch/x86/include/asm/idtentry.h:693
 smap_save mm/kmsan/instrumentation.c:92 [inline]
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:33 [inline]
 __msan_metadata_ptr_for_load_8+0xe/0x40 mm/kmsan/instrumentation.c:92
 aa_current_raw_label security/apparmor/include/cred.h:76 [inline]
 end_current_label_crit_section+0xb5/0x2a0 security/apparmor/include/cred.h:109
 apparmor_file_alloc_security+0x18f/0x260 security/apparmor/lsm.c:509
 security_file_alloc+0x156/0x290 security/security.c:2714
 init_file fs/file_table.c:152 [inline]
 alloc_empty_file+0x296/0x820 fs/file_table.c:206
 path_openat+0xa0/0x62a0 fs/namei.c:3799
 do_filp_open+0x20e/0x590 fs/namei.c:3840
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1413
 do_sys_open fs/open.c:1428 [inline]
 __do_sys_openat fs/open.c:1444 [inline]
 __se_sys_openat fs/open.c:1439 [inline]
 __x64_sys_openat+0x2a1/0x310 fs/open.c:1439
 x64_sys_call+0x128b/0x3b90 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4706
 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2336
 skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2920
 virtnet_rq_alloc+0x43/0xbb0 drivers/net/virtio_net.c:882
 add_recvbuf_mergeable drivers/net/virtio_net.c:2128 [inline]
 try_fill_recv+0x3f0/0x2f50 drivers/net/virtio_net.c:2173
 virtnet_open+0x1cc/0xb00 drivers/net/virtio_net.c:2452
 __dev_open+0x546/0x6f0 net/core/dev.c:1472
 __dev_change_flags+0x309/0x9a0 net/core/dev.c:8781
 dev_change_flags+0x8e/0x1d0 net/core/dev.c:8853
 devinet_ioctl+0x13ec/0x22c0 net/ipv4/devinet.c:1177
 inet_ioctl+0x4bd/0x6d0 net/ipv4/af_inet.c:1003
 sock_do_ioctl+0xb7/0x540 net/socket.c:1222
 sock_ioctl+0x727/0xd70 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x261/0x450 fs/ioctl.c:893
 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:893
 x64_sys_call+0x18c0/0x3b90 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 PID: 4779 Comm: rm Not tainted 6.10.0-rc7-syzkaller-00025-ga19ea421490d #0
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