syzkaller login: [ 35.820467] BUG: Bad rss-counter state mm:0000000097ea8ecb type:MM_FILEPAGES val:33 [ 35.821690] BUG: Bad rss-counter state mm:0000000097ea8ecb type:MM_ANONPAGES val:22 [ 35.858587] ================================================================== [ 35.859474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.860495] Read of size 8 at addr ffff88800df55880 by task sshd/219 [ 35.861348] [ 35.861565] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.862402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.863397] Call Trace: [ 35.863713] [ 35.863993] dump_stack_lvl+0x91/0xf0 [ 35.864472] print_report+0xcc/0x620 [ 35.864958] ? __virt_addr_valid+0x102/0x340 [ 35.865493] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.866104] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.866713] kasan_report+0xbe/0xf0 [ 35.867189] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.867811] vma_interval_tree_remove+0xc75/0xec0 [ 35.868407] vma_prepare+0xc54/0x11a0 [ 35.868877] __split_vma+0x5af/0x950 [ 35.869342] ? __pfx___split_vma+0x10/0x10 [ 35.869863] ? find_held_lock+0x2c/0x110 [ 35.870372] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.870948] ? lock_is_held_type+0x9f/0x120 [ 35.871488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.872083] ? mtree_range_walk+0x632/0x900 [ 35.872631] ? mas_walk+0x5c7/0x7c0 [ 35.873102] do_vmi_munmap+0x1f1/0x2b0 [ 35.873592] mmap_region+0x1f9/0x2660 [ 35.874064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.874579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.875296] ? __pfx_lock_acquire+0x10/0x10 [ 35.875829] ? __pfx_mmap_region+0x10/0x10 [ 35.876349] ? security_mmap_addr+0x7d/0xa0 [ 35.876877] ? get_unmapped_area+0x1f5/0x3f0 [ 35.877423] do_mmap+0x854/0xf00 [ 35.877857] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.878344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.878932] ksys_mmap_pgoff+0x3af/0x500 [ 35.879435] do_syscall_64+0x3f/0x90 [ 35.879911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.880556] RIP: 0033:0x7f3c6dfb0d82 [ 35.881016] 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 [ 35.883141] RSP: 002b:00007fff8e876b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.884049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c6dfb0d82 [ 35.884885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c6d3ea000 [ 35.885735] RBP: 00007f3c6d3ea000 R08: 0000000000000009 R09: 0000000000001000 [ 35.886573] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564f7f08ec0 [ 35.887416] R13: 00007fff8e876b60 R14: 00007fff8e876b90 R15: 00007fff8e876ef0 [ 35.888259] [ 35.888548] [ 35.888762] Allocated by task 212: [ 35.889183] kasan_save_stack+0x22/0x50 [ 35.889685] kasan_set_track+0x25/0x30 [ 35.890175] __kasan_slab_alloc+0x59/0x70 [ 35.890689] kmem_cache_alloc+0x16b/0x370 [ 35.891218] vm_area_dup+0x20/0x160 [ 35.891671] __split_vma+0x170/0x950 [ 35.892137] split_vma+0xc6/0x110 [ 35.892566] mprotect_fixup+0x8d2/0xb30 [ 35.893065] do_mprotect_pkey+0x87e/0xd40 [ 35.893589] __x64_sys_mprotect+0x78/0xc0 [ 35.894106] do_syscall_64+0x3f/0x90 [ 35.894580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.895229] [ 35.895449] Freed by task 212: [ 35.895843] kasan_save_stack+0x22/0x50 [ 35.896345] kasan_set_track+0x25/0x30 [ 35.896844] kasan_save_free_info+0x2b/0x50 [ 35.897366] __kasan_slab_free+0x10a/0x190 [ 35.897904] kmem_cache_free+0x10d/0x4d0 [ 35.898402] rcu_core+0x8c8/0x2860 [ 35.898860] __do_softirq+0x1b7/0x7d4 [ 35.899334] [ 35.899545] Last potentially related work creation: [ 35.900124] kasan_save_stack+0x22/0x50 [ 35.900615] __kasan_record_aux_stack+0x8e/0xa0 [ 35.901181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.901815] remove_vma+0x139/0x170 [ 35.902263] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.902827] do_vmi_munmap+0x1f1/0x2b0 [ 35.903311] __vm_munmap+0x138/0x3a0 [ 35.903775] __x64_sys_munmap+0x59/0x80 [ 35.904261] do_syscall_64+0x3f/0x90 [ 35.904739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.905389] [ 35.905604] Second to last potentially related work creation: [ 35.906290] kasan_save_stack+0x22/0x50 [ 35.906801] __kasan_record_aux_stack+0x8e/0xa0 [ 35.907371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.908007] remove_vma+0x139/0x170 [ 35.908451] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.909005] do_vmi_munmap+0x1f1/0x2b0 [ 35.909481] mmap_region+0x1f9/0x2660 [ 35.909958] do_mmap+0x854/0xf00 [ 35.910392] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.910884] ksys_mmap_pgoff+0x3af/0x500 [ 35.911383] do_syscall_64+0x3f/0x90 [ 35.911858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.912499] [ 35.912713] The buggy address belongs to the object at ffff88800df55828 [ 35.912713] which belongs to the cache vm_area_struct of size 168 [ 35.914171] The buggy address is located 88 bytes inside of [ 35.914171] freed 168-byte region [ffff88800df55828, ffff88800df558d0) [ 35.915562] [ 35.915781] The buggy address belongs to the physical page: [ 35.916431] page:000000008b0d2202 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf55 [ 35.917492] memcg:ffff88800d892101 [ 35.917915] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.918607] page_type: 0xffffffff() [ 35.919076] raw: 0100000000000200 ffff8880087a0c80 ffffea0000378e00 dead000000000005 [ 35.919983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d892101 [ 35.920883] page dumped because: kasan: bad access detected [ 35.921537] [ 35.921754] Memory state around the buggy address: [ 35.922324] ffff88800df55780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.923185] ffff88800df55800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.924028] >ffff88800df55880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.924880] ^ [ 35.925294] ffff88800df55900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.926135] ffff88800df55980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 35.926982] ================================================================== [ 35.928012] Disabling lock debugging due to kernel taint [ 37.914082] BUG: Bad rss-counter state mm:00000000b92ce93c type:MM_FILEPAGES val:33 [ 37.915318] BUG: Bad rss-counter state mm:00000000b92ce93c type:MM_ANONPAGES val:22 [ 38.484959] BUG: Bad rss-counter state mm:00000000baf5cdba type:MM_FILEPAGES val:33 [ 38.486206] BUG: Bad rss-counter state mm:00000000baf5cdba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3752' (ECDSA) to the list of known hosts. 2023/06/20 21:59:36 fuzzer started 2023/06/20 21:59:37 dialing manager at localhost:36067 2023/06/20 21:59:37 checking machine... 2023/06/20 21:59:37 checking revisions... [ 39.152055] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:37 testing simple program... [ 39.202022] cgroup: Unknown subsys name 'net' [ 39.261412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce2b940 RCX=ffffffff813c031d RDX=ffff88800905d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce2ba08 RSP=ffff88806ce09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0860 RFL=00000002 [-------] 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 00007fdbc1038900 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=00007fdbc04bb1a0 CR3=000000000c78a000 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=555170a15e204c7b00000000000ae988 XMM05=155d7cca3b210e580000000000133f38 XMM06=806171799158d96700000000001329b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=dffffc0000000000 RSI=0000000000000bd0 RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf099b0 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130754 RFL=00000283 [--S---C] 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 00007fde0e5e1900 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=00007fff7b6d6000 CR3=000000000f202000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000