Local variable description: ----__ai_n1.i.i.i.i@kmem_cache_free
Variable was created at:
 kmem_cache_free+0x155/0x3280 mm/slub.c:2995
 kfree_skbmem net/core/skbuff.c:604 [inline]
 __kfree_skb+0x2cc/0x310 net/core/skbuff.c:643
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan_hooks.c:338!
invalid opcode: 0000 [#1] SMP
CPU: 0 PID: 6279 Comm: syz-fuzzer Not tainted 4.19.0+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_free_page+0x28e/0x2d0 mm/kmsan/kmsan_hooks.c:399
Code: f8 b3 35 ff 4c 89 7d b8 ff 75 b8 9d 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 43 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b eb fe 0f 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b
RSP: 0018:ffff8801a698f5e0 EFLAGS: 00010286
RAX: 0000000000000001 RBX: ffffea0003e70000 RCX: 0000000000000060
RDX: ffff8801fc359488 RSI: 0000000000000009 RDI: ffffea0003e70000
RBP: ffff8801a698f630 R08: ffff880000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff820c8610 R12: 0000000000000200
R13: ffffea0003e70071 R14: 0000000000000009 R15: 0000000000000009
FS:  000000c420026ae8(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cdcef8330 CR3: 00000001a6933000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 free_pages_prepare mm/page_alloc.c:993 [inline]
 __free_pages_ok+0x327/0x10c0 mm/page_alloc.c:1251
 free_compound_page+0x8b/0xc0 mm/page_alloc.c:571
 free_transhuge_page+0x3bd/0x470 mm/huge_memory.c:2731
 __put_compound_page mm/swap.c:96 [inline]
 release_pages+0x937/0x17d0 mm/swap.c:760
 free_pages_and_swap_cache+0x553/0x590 mm/swap_state.c:319
 tlb_flush_mmu_free mm/memory.c:250 [inline]
 tlb_flush_mmu+0x534/0x700 mm/memory.c:259
 arch_tlb_finish_mmu mm/memory.c:274 [inline]
 tlb_finish_mmu+0x2fe/0x5e0 mm/memory.c:433
 zap_page_range+0xdab/0xe50 mm/memory.c:1613
 madvise_dontneed_single_vma mm/madvise.c:510 [inline]
 madvise_dontneed_free mm/madvise.c:563 [inline]
 madvise_vma mm/madvise.c:698 [inline]
 __do_sys_madvise mm/madvise.c:873 [inline]
 __se_sys_madvise+0x1bfe/0x4300 mm/madvise.c:801
 __x64_sys_madvise+0x4a/0x70 mm/madvise.c:801
 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x45ddc7
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <c3> cc cc cc cc cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:000000c42003fd60 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000470000 RCX: 000000000045ddc7
RDX: 0000000000000004 RSI: 0000000000470000 RDI: 000000c4366c0000
RBP: 000000c42003fd90 R08: 000000c434eea000 R09: 0000000000001000
R10: 00000000000e2000 R11: 0000000000000246 R12: 0000000000000b90
R13: 00000000000000e7 R14: 00007f9f2b4dd6c8 R15: 0000000000000020
Modules linked in:
---[ end trace 257ee879e00c892b ]---
RIP: 0010:kmsan_free_page+0x28e/0x2d0 mm/kmsan/kmsan_hooks.c:399
Code: f8 b3 35 ff 4c 89 7d b8 ff 75 b8 9d 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 43 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b eb fe 0f 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b
RSP: 0018:ffff8801a698f5e0 EFLAGS: 00010286
RAX: 0000000000000001 RBX: ffffea0003e70000 RCX: 0000000000000060
RDX: ffff8801fc359488 RSI: 0000000000000009 RDI: ffffea0003e70000
RBP: ffff8801a698f630 R08: ffff880000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff820c8610 R12: 0000000000000200
R13: ffffea0003e70071 R14: 0000000000000009 R15: 0000000000000009
FS:  000000c420026ae8(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cdcef8330 CR3: 00000001a6933000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400