syzkaller login: [ 31.179006] BUG: Bad rss-counter state mm:00000000c1824d48 type:MM_FILEPAGES val:33 [ 31.180310] BUG: Bad rss-counter state mm:00000000c1824d48 type:MM_ANONPAGES val:22 [ 31.217669] ================================================================== [ 31.218668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.219697] Read of size 8 at addr ffff888016818df0 by task sshd/219 [ 31.220570] [ 31.220814] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.221684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.222653] Call Trace: [ 31.223068] [ 31.223399] dump_stack_lvl+0x91/0xf0 [ 31.223895] print_report+0xcc/0x620 [ 31.224481] ? __virt_addr_valid+0x102/0x340 [ 31.225145] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225777] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226500] kasan_report+0xbe/0xf0 [ 31.226977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227611] vma_interval_tree_remove+0xc75/0xec0 [ 31.228320] vma_prepare+0xc54/0x11a0 [ 31.228903] __split_vma+0x5af/0x950 [ 31.229375] ? __pfx___split_vma+0x10/0x10 [ 31.229900] ? find_held_lock+0x2c/0x110 [ 31.230421] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.230982] ? lock_is_held_type+0x9f/0x120 [ 31.231523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232126] ? mtree_range_walk+0x632/0x900 [ 31.232689] ? mas_walk+0x5c7/0x7c0 [ 31.233169] do_vmi_munmap+0x1f1/0x2b0 [ 31.233666] mmap_region+0x1f9/0x2660 [ 31.234139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.234651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235368] ? __pfx_lock_acquire+0x10/0x10 [ 31.235905] ? __pfx_mmap_region+0x10/0x10 [ 31.236434] ? security_mmap_addr+0x7d/0xa0 [ 31.236996] ? get_unmapped_area+0x1f5/0x3f0 [ 31.237549] do_mmap+0x854/0xf00 [ 31.237989] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.238487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239059] ksys_mmap_pgoff+0x3af/0x500 [ 31.239566] do_syscall_64+0x3f/0x90 [ 31.240044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240702] RIP: 0033:0x7f86944d8d82 [ 31.241154] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.243268] RSP: 002b:00007ffc6b701f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.244166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86944d8d82 [ 31.245024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8693912000 [ 31.245871] RBP: 00007f8693912000 R08: 0000000000000009 R09: 0000000000001000 [ 31.246714] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b56036980 [ 31.247553] R13: 00007ffc6b701f70 R14: 00007ffc6b701fa0 R15: 00007ffc6b702300 [ 31.248409] [ 31.248723] [ 31.248940] Allocated by task 212: [ 31.249366] kasan_save_stack+0x22/0x50 [ 31.249865] kasan_set_track+0x25/0x30 [ 31.250358] __kasan_slab_alloc+0x59/0x70 [ 31.250880] kmem_cache_alloc+0x16b/0x370 [ 31.251395] vm_area_dup+0x20/0x160 [ 31.251852] __split_vma+0x170/0x950 [ 31.252322] split_vma+0xc6/0x110 [ 31.252760] mprotect_fixup+0x8d2/0xb30 [ 31.253264] do_mprotect_pkey+0x87e/0xd40 [ 31.253793] __x64_sys_mprotect+0x78/0xc0 [ 31.254310] do_syscall_64+0x3f/0x90 [ 31.254788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255434] [ 31.255650] Freed by task 212: [ 31.256042] kasan_save_stack+0x22/0x50 [ 31.256565] kasan_set_track+0x25/0x30 [ 31.257057] kasan_save_free_info+0x2b/0x50 [ 31.257587] __kasan_slab_free+0x10a/0x190 [ 31.258126] kmem_cache_free+0x10d/0x4d0 [ 31.258699] rcu_core+0x8c8/0x2860 [ 31.259164] __do_softirq+0x1b7/0x7d4 [ 31.259648] [ 31.259862] Last potentially related work creation: [ 31.260447] kasan_save_stack+0x22/0x50 [ 31.260959] __kasan_record_aux_stack+0x8e/0xa0 [ 31.261529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.262171] remove_vma+0x139/0x170 [ 31.262621] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.263174] do_vmi_munmap+0x1f1/0x2b0 [ 31.263662] __vm_munmap+0x138/0x3a0 [ 31.264132] __x64_sys_munmap+0x59/0x80 [ 31.264657] do_syscall_64+0x3f/0x90 [ 31.265137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265780] [ 31.265996] The buggy address belongs to the object at ffff888016818d98 [ 31.265996] which belongs to the cache vm_area_struct of size 168 [ 31.267458] The buggy address is located 88 bytes inside of [ 31.267458] freed 168-byte region [ffff888016818d98, ffff888016818e40) [ 31.268872] [ 31.269085] The buggy address belongs to the physical page: [ 31.269745] page:00000000f2147ad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16818 [ 31.270830] memcg:ffff888016f69e01 [ 31.271252] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.271897] page_type: 0xffffffff() [ 31.272353] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.273276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f69e01 [ 31.274169] page dumped because: kasan: bad access detected [ 31.274831] [ 31.275053] Memory state around the buggy address: [ 31.275631] ffff888016818c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.276493] ffff888016818d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.277344] >ffff888016818d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.278192] ^ [ 31.278997] ffff888016818e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.279847] ffff888016818e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.280695] ================================================================== [ 31.281638] Disabling lock debugging due to kernel taint [ 34.087739] BUG: Bad rss-counter state mm:00000000a66d3b01 type:MM_FILEPAGES val:33 [ 34.088821] BUG: Bad rss-counter state mm:00000000a66d3b01 type:MM_ANONPAGES val:22 [ 34.594454] BUG: Bad rss-counter state mm:00000000535e46b8 type:MM_FILEPAGES val:33 [ 34.595477] BUG: Bad rss-counter state mm:00000000535e46b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43262' (ECDSA) to the list of known hosts. 2023/06/21 07:39:05 fuzzer started 2023/06/21 07:39:06 dialing manager at localhost:36067 2023/06/21 07:39:06 checking machine... 2023/06/21 07:39:06 checking revisions... [ 35.355352] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:39:06 testing simple program... [ 35.414121] cgroup: Unknown subsys name 'net' [ 35.459582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:05 Registers: info registers vcpu 0 RAX=ffff888014758000 RBX=ffff88801475fa58 RCX=ffff88801475fa60 RDX=ffff888014760000 RSI=ffff88801475f990 RDI=ffff88801475f9d0 RBP=dffffc0000000000 RSP=ffff88801475f970 R8 =0000000000000001 R9 =ffff88801475fa00 R10=0000000000038001 R11=0000000000006097 R12=ffffed10028ebf3a R13=ffffed10028ebf39 R14=ffff88801475fa08 R15=ffff88801475f9c0 RIP=ffffffff81132fd4 RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbc4cd3a900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fbc4c258010 CR3=000000000cb94000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=695f693e4f4b0d3100000000000ae988 XMM05=ebbf35402f210f600000000000132d98 XMM06=4fda316b135da52b0000000000131b88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010000 RBX=0000000000000000 RCX=ffffffff813c91c6 RDX=ffff888016b50000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88806cf28140 RSP=ffff88806cf09e98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000803a6c740 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007febc085b900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007febc0825008 CR3=000000000e8bc000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000