syzkaller login: [ 38.727542] BUG: Bad rss-counter state mm:000000001c97ed8f type:MM_FILEPAGES val:33 [ 38.728949] BUG: Bad rss-counter state mm:000000001c97ed8f type:MM_ANONPAGES val:22 [ 38.876515] ================================================================== [ 38.877447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.878387] Read of size 8 at addr ffff888017b845c8 by task sshd/220 [ 38.879163] [ 38.879384] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.880577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881880] Call Trace: [ 38.882358] [ 38.882723] dump_stack_lvl+0x91/0xf0 [ 38.883361] print_report+0xcc/0x620 [ 38.883967] ? __virt_addr_valid+0x102/0x340 [ 38.884661] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885435] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886217] kasan_report+0xbe/0xf0 [ 38.886816] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887594] vma_interval_tree_remove+0xc75/0xec0 [ 38.888232] vma_prepare+0xc54/0x11a0 [ 38.888735] __split_vma+0x5af/0x950 [ 38.889235] ? __pfx___split_vma+0x10/0x10 [ 38.889795] ? find_held_lock+0x2c/0x110 [ 38.890342] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890936] ? lock_is_held_type+0x9f/0x120 [ 38.891689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.892488] ? mtree_range_walk+0x632/0x900 [ 38.893223] ? mas_walk+0x5c7/0x7c0 [ 38.893856] do_vmi_munmap+0x1f1/0x2b0 [ 38.894499] mmap_region+0x1f9/0x2660 [ 38.895150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.895833] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896782] ? __pfx_lock_acquire+0x10/0x10 [ 38.897499] ? __pfx_mmap_region+0x10/0x10 [ 38.898190] ? security_mmap_addr+0x7d/0xa0 [ 38.898890] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899622] do_mmap+0x854/0xf00 [ 38.900205] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901600] ksys_mmap_pgoff+0x3af/0x500 [ 38.902260] do_syscall_64+0x3f/0x90 [ 38.902893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903768] RIP: 0033:0x7fc065537d82 [ 38.904382] 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 [ 38.907213] RSP: 002b:00007ffd19d1f458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc065537d82 [ 38.909527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc064971000 [ 38.910647] RBP: 00007fc064971000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911779] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574d287eec0 [ 38.912902] R13: 00007ffd19d1f470 R14: 00007ffd19d1f4a0 R15: 00007ffd19d1f800 [ 38.914038] [ 38.914425] [ 38.914704] Allocated by task 213: [ 38.915278] kasan_save_stack+0x22/0x50 [ 38.915946] kasan_set_track+0x25/0x30 [ 38.916592] __kasan_slab_alloc+0x59/0x70 [ 38.917273] kmem_cache_alloc+0x16b/0x370 [ 38.917958] vm_area_dup+0x20/0x160 [ 38.918562] __split_vma+0x170/0x950 [ 38.919183] split_vma+0xc6/0x110 [ 38.919745] mprotect_fixup+0x8d2/0xb30 [ 38.920406] do_mprotect_pkey+0x87e/0xd40 [ 38.921191] __x64_sys_mprotect+0x78/0xc0 [ 38.921872] do_syscall_64+0x3f/0x90 [ 38.922487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923329] [ 38.923603] Freed by task 213: [ 38.924123] kasan_save_stack+0x22/0x50 [ 38.924783] kasan_set_track+0x25/0x30 [ 38.925425] kasan_save_free_info+0x2b/0x50 [ 38.926138] __kasan_slab_free+0x10a/0x190 [ 38.926818] kmem_cache_free+0x10d/0x4d0 [ 38.927410] rcu_core+0x8c8/0x2860 [ 38.927878] __do_softirq+0x1b7/0x7d4 [ 38.928380] [ 38.928610] Last potentially related work creation: [ 38.929225] kasan_save_stack+0x22/0x50 [ 38.929752] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931035] remove_vma+0x139/0x170 [ 38.931512] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932097] do_vmi_munmap+0x1f1/0x2b0 [ 38.932607] __vm_munmap+0x138/0x3a0 [ 38.933098] __x64_sys_munmap+0x59/0x80 [ 38.933621] do_syscall_64+0x3f/0x90 [ 38.934123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934798] [ 38.935031] The buggy address belongs to the object at ffff888017b84570 [ 38.935031] which belongs to the cache vm_area_struct of size 168 [ 38.936616] The buggy address is located 88 bytes inside of [ 38.936616] freed 168-byte region [ffff888017b84570, ffff888017b84618) [ 38.938140] [ 38.938376] The buggy address belongs to the physical page: [ 38.939104] page:00000000d1914b16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17b84 [ 38.940281] memcg:ffff8880164bf401 [ 38.940745] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941447] page_type: 0xffffffff() [ 38.941939] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.942945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164bf401 [ 38.943934] page dumped because: kasan: bad access detected [ 38.944652] [ 38.944887] Memory state around the buggy address: [ 38.945517] ffff888017b84480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.946465] ffff888017b84500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.947399] >ffff888017b84580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948330] ^ [ 38.949056] ffff888017b84600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.949986] ffff888017b84680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.950908] ================================================================== [ 38.952019] Disabling lock debugging due to kernel taint [ 41.132625] BUG: Bad rss-counter state mm:000000006a8c9912 type:MM_FILEPAGES val:33 [ 41.133599] BUG: Bad rss-counter state mm:000000006a8c9912 type:MM_ANONPAGES val:22 [ 41.530697] BUG: Bad rss-counter state mm:00000000483f1eff type:MM_FILEPAGES val:33 [ 41.532248] BUG: Bad rss-counter state mm:00000000483f1eff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39567' (ECDSA) to the list of known hosts. 2023/06/21 09:42:21 fuzzer started 2023/06/21 09:42:21 dialing manager at localhost:36067 2023/06/21 09:42:21 checking machine... 2023/06/21 09:42:21 checking revisions... [ 42.206085] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:42:21 testing simple program... [ 42.257261] cgroup: Unknown subsys name 'net' [ 42.304749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff8880143fff38 RSI=ffff8880143fff18 RDI=ffff8880143ffa98 RBP=ffff8880143ffb30 RSP=ffff8880143ffa90 R8 =0000000000000001 R9 =ffff8880143ffad8 R10=0000000000038001 R11=0000000000010484 R12=ffff8880143ffb60 R13=0000000000000000 R14=ffff888015810000 R15=ffff88800c814a00 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007effae7c4900 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=00007effadce2000 CR3=000000000ed34000 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=ebeb52e3d9535a3100000000000ae988 XMM05=688786f82859908e0000000000132e78 XMM06=19e9129bd510f2350000000000131c50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016951000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019c6d1c0 RSI=ffffffff8386f2f2 RDI=0000000000000005 RBP=ffff888019defd90 RSP=ffff888019defc98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffff8880169516b8 R15=ffff888016951080 RIP=ffffffff8386f2f9 RFL=00000093 [--S-A-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 00007f22f2eb1900 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=00007fffb31cf000 CR3=000000001a3a4000 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