syzbot

vcan0: j1939_tp_rxtimer: 0xffff88808f51b000: abort rx timeout. Force session deactivation
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BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x1064/0x1a90 net/core/dev.c:4783
 bpf_prog_run_generic_xdp+0x1064/0x1a90 net/core/dev.c:4783
 netif_receive_generic_xdp net/core/dev.c:4846 [inline]
 do_xdp_generic+0x681/0xaf0 net/core/dev.c:4905
 __netif_receive_skb_core+0x253f/0x5e90 net/core/dev.c:5312
 __netif_receive_skb_one_core net/core/dev.c:5489 [inline]
 __netif_receive_skb+0xc3/0x5a0 net/core/dev.c:5605
 process_backlog+0x480/0x8b0 net/core/dev.c:5933
 __napi_poll+0xe4/0x950 net/core/dev.c:6496
 napi_poll net/core/dev.c:6563 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6696
 __do_softirq+0x1b7/0x78f kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0xc2/0x1b0 kernel/softirq.c:650
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x7a/0x90 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:645
 flat_send_IPI_mask+0xa8/0xd0 arch/x86/kernel/apic/apic_flat_64.c:65
 default_send_IPI_single+0x61/0x80 arch/x86/kernel/apic/ipi.c:227
 native_send_call_func_single_ipi+0x48/0x60 arch/x86/kernel/apic/ipi.c:76
 arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:109 [inline]
 send_call_function_single_ipi kernel/smp.c:112 [inline]
 smp_call_function_many_cond+0x9ed/0x13c0 kernel/smp.c:810
 on_each_cpu_cond_mask+0x5d/0xd0 kernel/smp.c:996
 on_each_cpu include/linux/smp.h:71 [inline]
 flush_tlb_kernel_range+0x156/0x180 arch/x86/mm/tlb.c:1077
 kmsan_vmap_pages_range_noflush+0x326/0x3d0 mm/kmsan/shadow.c:265
 vmap_pages_range_noflush mm/vmalloc.c:608 [inline]
 vmap_pages_range mm/vmalloc.c:633 [inline]
 __vmalloc_area_node mm/vmalloc.c:3119 [inline]
 __vmalloc_node_range+0x2184/0x2940 mm/vmalloc.c:3257
 __vmalloc_node mm/vmalloc.c:3322 [inline]
 vmalloc+0x90/0xa0 mm/vmalloc.c:3355
 xt_compat_init_offsets+0x14b/0x310 net/netfilter/x_tables.c:733
 compat_table_info+0x9f/0x1180 net/ipv4/netfilter/ip_tables.c:934
 compat_get_entries net/ipv4/netfilter/ip_tables.c:1594 [inline]
 do_ipt_get_ctl+0xb61/0x2090 net/ipv4/netfilter/ip_tables.c:1657
 nf_getsockopt+0x421/0x480 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x2ba/0x400 net/ipv4/ip_sockglue.c:1825
 tcp_getsockopt+0x159/0x190 net/ipv4/tcp.c:4403
 sock_common_getsockopt+0x9d/0xd0 net/core/sock.c:3636
 __sys_getsockopt+0x571/0xac0 net/socket.c:2317
 __do_compat_sys_socketcall net/compat.c:494 [inline]
 __se_compat_sys_socketcall+0x3fe/0x1a10 net/compat.c:423
 __ia32_compat_sys_socketcall+0x6b/0xa0 net/compat.c:423
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was stored to memory at:
 pskb_expand_head+0x305/0x1a10 net/core/skbuff.c:2062
 netif_receive_generic_xdp net/core/dev.c:4838 [inline]
 do_xdp_generic+0x511/0xaf0 net/core/dev.c:4905
 __netif_receive_skb_core+0x253f/0x5e90 net/core/dev.c:5312
 __netif_receive_skb_one_core net/core/dev.c:5489 [inline]
 __netif_receive_skb+0xc3/0x5a0 net/core/dev.c:5605
 process_backlog+0x480/0x8b0 net/core/dev.c:5933
 __napi_poll+0xe4/0x950 net/core/dev.c:6496
 napi_poll net/core/dev.c:6563 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6696
 __do_softirq+0x1b7/0x78f kernel/softirq.c:571

Uninit was created at:
 slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716
 slab_alloc_node mm/slub.c:3451 [inline]
 kmem_cache_alloc_node+0x535/0xa30 mm/slub.c:3496
 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:568
 __alloc_skb+0x318/0x740 net/core/skbuff.c:654
 alloc_skb include/linux/skbuff.h:1288 [inline]
 alloc_skb_with_frags+0xbd/0xbb0 net/core/skbuff.c:6380
 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2729
 sock_alloc_send_skb include/net/sock.h:1860 [inline]
 j1939_sk_alloc_skb net/can/j1939/socket.c:864 [inline]
 j1939_sk_send_loop net/can/j1939/socket.c:1121 [inline]
 j1939_sk_sendmsg+0xd18/0x2570 net/can/j1939/socket.c:1256
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x999/0xd50 net/socket.c:2503
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2557
 __sys_sendmsg+0x222/0x3c0 net/socket.c:2586
 __compat_sys_sendmsg net/compat.c:346 [inline]
 __do_compat_sys_sendmsg net/compat.c:353 [inline]
 __se_compat_sys_sendmsg net/compat.c:350 [inline]
 __ia32_compat_sys_sendmsg+0x9d/0xe0 net/compat.c:350
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 4972 Comm: syz-executor.0 Not tainted 6.4.0-rc4-syzkaller-g2741f1b02117 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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