=====================================================
BUG: KMSAN: uninit-value in ____bpf_get_branch_snapshot kernel/trace/bpf_trace.c:1076 [inline]
BUG: KMSAN: uninit-value in bpf_get_branch_snapshot+0x128/0x180 kernel/trace/bpf_trace.c:1066
 ____bpf_get_branch_snapshot kernel/trace/bpf_trace.c:1076 [inline]
 bpf_get_branch_snapshot+0x128/0x180 kernel/trace/bpf_trace.c:1066
 ___bpf_prog_run+0x92d/0xb420 kernel/bpf/core.c:1558
 __bpf_prog_run32+0x121/0x180 kernel/bpf/core.c:1796
 bpf_dispatcher_nop_func include/linux/bpf.h:784 [inline]
 __bpf_prog_run include/linux/filter.h:619 [inline]
 bpf_prog_run include/linux/filter.h:633 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1988 [inline]
 bpf_trace_run1+0x1b0/0x310 kernel/trace/bpf_trace.c:2024
 __bpf_trace_mm_page_free_batched+0xf8/0x140 include/trace/events/kmem.h:182
 trace_mm_page_free_batched include/trace/events/kmem.h:182 [inline]
 free_unref_page_list+0xd19/0xe30 mm/page_alloc.c:3482
 release_pages+0x1e9b/0x1ed0 mm/swap.c:980
 free_pages_and_swap_cache+0x4f9/0x520 mm/swap_state.c:320
 tlb_batch_pages_flush mm/mmu_gather.c:51 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:244 [inline]
 tlb_flush_mmu+0x8f9/0xa80 mm/mmu_gather.c:251
 tlb_finish_mmu+0x130/0x310 mm/mmu_gather.c:351
 unmap_region+0x641/0x6c0 mm/mmap.c:2659
 __do_munmap+0x37aa/0x4430 mm/mmap.c:2890
 do_munmap mm/mmap.c:2901 [inline]
 munmap_vma_range mm/mmap.c:604 [inline]
 mmap_region+0x1a5c/0x3e20 mm/mmap.c:1748
 do_mmap+0x18b1/0x2370 mm/mmap.c:1582
 vm_mmap_pgoff+0x362/0x570 mm/util.c:519
 ksys_mmap_pgoff+0x664/0xa50 mm/mmap.c:1630
 __do_sys_mmap_pgoff mm/mmap.c:1641 [inline]
 __se_sys_mmap_pgoff mm/mmap.c:1637 [inline]
 __ia32_sys_mmap_pgoff+0x1a0/0x200 mm/mmap.c:1637
 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Local variable regs created at:
 __bpf_prog_run32+0x84/0x180 kernel/bpf/core.c:1796
 bpf_dispatcher_nop_func include/linux/bpf.h:784 [inline]
 __bpf_prog_run include/linux/filter.h:619 [inline]
 bpf_prog_run include/linux/filter.h:633 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1988 [inline]
 bpf_trace_run1+0x1b0/0x310 kernel/trace/bpf_trace.c:2024

CPU: 1 PID: 11434 Comm: syz-executor.5 Not tainted 5.17.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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