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BUG: KMSAN: uninit-value in vmacache_find+0x296/0x740 mm/vmacache.c:73
CPU: 0 PID: 19310 Comm: syz-executor.1 Not tainted 5.7.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 vmacache_find+0x296/0x740 mm/vmacache.c:73
 find_vma+0x7d/0x330 mm/mmap.c:2240
 do_user_addr_fault+0x63f/0x1600 arch/x86/mm/fault.c:1445
 do_page_fault+0x1ba/0x840 arch/x86/mm/fault.c:1555
 page_fault+0x4e/0x60 arch/x86/entry/entry_64.S:1213
RIP: 0010:__sys_sendmmsg+0x92d/0xd60 net/socket.c:2503
Code: 3b f6 45 85 ed 0f 85 70 02 00 00 48 8b 44 24 78 4c 8d 78 1c 48 83 7c 24 60 00 4c 8b 6c 24 68 0f 85 64 02 00 00 bb f2 ff ff ff <45> 89 27 e8 9b 5c d0 f5 31 db 0f 1f 00 48 83 44 24 78 20 4c 8b 64
RSP: 0018:ffff9d36c161fb30 EFLAGS: 00010246
RAX: 000000002000a000 RBX: 00000000fffffff2 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: 0000000000000004 RDI: ffff9d36c161fbcc
RBP: ffff9d36c161fe28 R08: 0000000000000002 R09: ffff9d36c161fad8
R10: 0000000000000004 R11: ffffffff8fea2940 R12: 0000000000000000
R13: 0000000020007fc0 R14: ffff9b44e0672858 R15: 000000002000a01c
 __compat_sys_sendmmsg net/compat.c:672 [inline]
 __do_compat_sys_sendmmsg net/compat.c:679 [inline]
 __se_compat_sys_sendmmsg+0xcd/0xf0 net/compat.c:676
 __ia32_compat_sys_sendmmsg+0x56/0x70 net/compat.c:676
 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
 do_fast_syscall_32+0x3bf/0x6d0 arch/x86/entry/common.c:398
 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f35dd9
Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d0f0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000159
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020007fc0
RDX: 00000000000001a8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310
 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165
 ___bpf_prog_run+0x6cbe/0x97a0 kernel/bpf/core.c:1391
 __bpf_prog_run32+0x101/0x170 kernel/bpf/core.c:1681
 bpf_dispatcher_nop_func include/linux/bpf.h:545 [inline]
 __bpf_prog_run_save_cb include/linux/filter.h:693 [inline]
 bpf_prog_run_save_cb include/linux/filter.h:707 [inline]
 sk_filter_trim_cap+0x42a/0xcc0 net/core/filter.c:119
 sk_filter include/linux/filter.h:833 [inline]
 sock_queue_rcv_skb+0x83/0x130 net/core/sock.c:487
 packet_rcv_spkt+0x656/0x7c0 net/packet/af_packet.c:1851
 dev_queue_xmit_nit+0x1199/0x1270 net/core/dev.c:2276
 xmit_one net/core/dev.c:3473 [inline]
 dev_hard_start_xmit+0x20f/0xab0 net/core/dev.c:3493
 sch_direct_xmit+0x512/0x18b0 net/sched/sch_generic.c:314
 qdisc_restart net/sched/sch_generic.c:377 [inline]
 __qdisc_run+0x15ec/0x3350 net/sched/sch_generic.c:385
 qdisc_run include/net/pkt_sched.h:134 [inline]
 __dev_xmit_skb net/core/dev.c:3668 [inline]
 __dev_queue_xmit+0x23b7/0x3b20 net/core/dev.c:4021
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4085
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip_finish_output2+0x20fd/0x2610 net/ipv4/ip_output.c:228
 __ip_finish_output+0xaa7/0xd80 net/ipv4/ip_output.c:306
 ip_finish_output+0x166/0x410 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x593/0x680 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out net/ipv4/ip_output.c:125 [inline]
 ip_send_skb+0x179/0x360 net/ipv4/ip_output.c:1560
 udp_send_skb+0x1046/0x18b0 net/ipv4/udp.c:891
 udp_sendmsg+0x3bb5/0x4100 net/ipv4/udp.c:1178
 inet_sendmsg+0x276/0x2e0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0x1056/0x1350 net/socket.c:2362
 ___sys_sendmsg net/socket.c:2416 [inline]
 __sys_sendmmsg+0x863/0xd60 net/socket.c:2499
 __compat_sys_sendmmsg net/compat.c:672 [inline]
 __do_compat_sys_sendmmsg net/compat.c:679 [inline]
 __se_compat_sys_sendmmsg+0xcd/0xf0 net/compat.c:676
 __ia32_compat_sys_sendmmsg+0x56/0x70 net/compat.c:676
 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
 do_fast_syscall_32+0x3bf/0x6d0 arch/x86/entry/common.c:398
 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310
 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165
 ___bpf_prog_run+0x6c64/0x97a0 kernel/bpf/core.c:1391
 __bpf_prog_run32+0x101/0x170 kernel/bpf/core.c:1681
 bpf_dispatcher_nop_func include/linux/bpf.h:545 [inline]
 __bpf_prog_run_save_cb include/linux/filter.h:693 [inline]
 bpf_prog_run_save_cb include/linux/filter.h:707 [inline]
 sk_filter_trim_cap+0x42a/0xcc0 net/core/filter.c:119
 sk_filter include/linux/filter.h:833 [inline]
 sock_queue_rcv_skb+0x83/0x130 net/core/sock.c:487
 packet_rcv_spkt+0x656/0x7c0 net/packet/af_packet.c:1851
 dev_queue_xmit_nit+0x1199/0x1270 net/core/dev.c:2276
 xmit_one net/core/dev.c:3473 [inline]
 dev_hard_start_xmit+0x20f/0xab0 net/core/dev.c:3493
 sch_direct_xmit+0x512/0x18b0 net/sched/sch_generic.c:314
 qdisc_restart net/sched/sch_generic.c:377 [inline]
 __qdisc_run+0x15ec/0x3350 net/sched/sch_generic.c:385
 qdisc_run include/net/pkt_sched.h:134 [inline]
 __dev_xmit_skb net/core/dev.c:3668 [inline]
 __dev_queue_xmit+0x23b7/0x3b20 net/core/dev.c:4021
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4085
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip_finish_output2+0x20fd/0x2610 net/ipv4/ip_output.c:228
 __ip_finish_output+0xaa7/0xd80 net/ipv4/ip_output.c:306
 ip_finish_output+0x166/0x410 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x593/0x680 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out net/ipv4/ip_output.c:125 [inline]
 ip_send_skb+0x179/0x360 net/ipv4/ip_output.c:1560
 udp_send_skb+0x1046/0x18b0 net/ipv4/udp.c:891
 udp_sendmsg+0x3bb5/0x4100 net/ipv4/udp.c:1178
 inet_sendmsg+0x276/0x2e0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0x1056/0x1350 net/socket.c:2362
 ___sys_sendmsg net/socket.c:2416 [inline]
 __sys_sendmmsg+0x863/0xd60 net/socket.c:2499
 __compat_sys_sendmmsg net/compat.c:672 [inline]
 __do_compat_sys_sendmmsg net/compat.c:679 [inline]
 __se_compat_sys_sendmmsg+0xcd/0xf0 net/compat.c:676
 __ia32_compat_sys_sendmmsg+0x56/0x70 net/compat.c:676
 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
 do_fast_syscall_32+0x3bf/0x6d0 arch/x86/entry/common.c:398
 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139

Local variable ----regs@__bpf_prog_run32 created at:
 __bpf_prog_run32+0x87/0x170 kernel/bpf/core.c:1681
 __bpf_prog_run32+0x87/0x170 kernel/bpf/core.c:1681
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