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BUG: KMSAN: uninit-value in receive_mergeable drivers/net/virtio_net.c:2261 [inline]
BUG: KMSAN: uninit-value in receive_buf+0xba1/0x25d0 drivers/net/virtio_net.c:2394
 receive_mergeable drivers/net/virtio_net.c:2261 [inline]
 receive_buf+0xba1/0x25d0 drivers/net/virtio_net.c:2394
 virtnet_receive_packets drivers/net/virtio_net.c:2699 [inline]
 virtnet_receive drivers/net/virtio_net.c:2723 [inline]
 virtnet_poll+0x529c/0x6a20 drivers/net/virtio_net.c:2818
 __napi_poll+0xe7/0x980 net/core/dev.c:6771
 napi_poll net/core/dev.c:6840 [inline]
 net_rx_action+0xa5a/0x19b0 net/core/dev.c:6962
 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
 virt_to_page_or_null+0x1/0x150 mm/kmsan/shadow.c:74
 kmsan_get_shadow_origin_ptr+0x38/0xb0 mm/kmsan/shadow.c:97
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:36 [inline]
 __msan_metadata_ptr_for_load_4+0x24/0x40 mm/kmsan/instrumentation.c:91
 stack_trace_consume_entry+0x4f/0x1e0 kernel/stacktrace.c:86
 stack_trace_save+0xaa/0xe0 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:74 [inline]
 kmsan_internal_poison_memory+0x49/0x90 mm/kmsan/core.c:58
 kmsan_slab_alloc+0xdf/0x160 mm/kmsan/hooks.c:68
 slab_post_alloc_hook mm/slub.c:3985 [inline]
 slab_alloc_node mm/slub.c:4028 [inline]
 kmem_cache_alloc_noprof+0x637/0xb20 mm/slub.c:4035
 mt_alloc_one lib/maple_tree.c:162 [inline]
 mas_alloc_nodes+0x4a3/0xf00 lib/maple_tree.c:1242
 mas_node_count_gfp lib/maple_tree.c:1322 [inline]
 mas_preallocate+0x183c/0x2730 lib/maple_tree.c:5556
 vma_iter_prealloc mm/internal.h:1360 [inline]
 vma_link+0x127/0xa40 mm/mmap.c:413
 insert_vm_struct+0x3a7/0x550 mm/mmap.c:3413
 __install_special_mapping+0x249/0x650 mm/mmap.c:3653
 _install_special_mapping+0x56/0x70 mm/mmap.c:3690
 map_vdso+0x385/0x7d0 arch/x86/entry/vdso/vma.c:257
 arch_setup_additional_pages+0x82/0xd0 arch/x86/entry/vdso/vma.c:319
 load_elf_binary+0x400b/0x5090 fs/binfmt_elf.c:1271
 search_binary_handler fs/exec.c:1821 [inline]
 exec_binprm fs/exec.c:1863 [inline]
 bprm_execve+0xba7/0x2010 fs/exec.c:1914
 do_execveat_common+0xd5d/0xe00 fs/exec.c:2021
 do_execve fs/exec.c:2095 [inline]
 __do_sys_execve fs/exec.c:2171 [inline]
 __se_sys_execve fs/exec.c:2166 [inline]
 __x64_sys_execve+0xf4/0x130 fs/exec.c:2166
 x64_sys_call+0x1648/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:60
 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:2941
 virtnet_rq_alloc+0x43/0xbb0 drivers/net/virtio_net.c:921
 add_recvbuf_mergeable drivers/net/virtio_net.c:2524 [inline]
 try_fill_recv+0x89c/0x3bc0 drivers/net/virtio_net.c:2573
 virtnet_open+0x1d8/0xd00 drivers/net/virtio_net.c:2898
 __dev_open+0x546/0x6f0 net/core/dev.c:1474
 __dev_change_flags+0x309/0x9a0 net/core/dev.c:8837
 dev_change_flags+0x8e/0x1d0 net/core/dev.c:8909
 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+0x1a06/0x3c10 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: 4794 Comm: dhcpcd-run-hook Not tainted 6.10.0-syzkaller-08447-gcf05e93af423 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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