syzkaller login: [ 30.322093] BUG: Bad rss-counter state mm:00000000c992aae2 type:MM_FILEPAGES val:33 [ 30.323077] BUG: Bad rss-counter state mm:00000000c992aae2 type:MM_ANONPAGES val:22 [ 30.494581] ================================================================== [ 30.495508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.496578] Read of size 8 at addr ffff888010370880 by task sshd/221 [ 30.497355] [ 30.497586] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.498466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.499444] Call Trace: [ 30.499765] [ 30.500050] dump_stack_lvl+0x91/0xf0 [ 30.500545] print_report+0xcc/0x620 [ 30.501032] ? __virt_addr_valid+0x102/0x340 [ 30.501605] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502841] kasan_report+0xbe/0xf0 [ 30.503316] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503939] vma_interval_tree_remove+0xc75/0xec0 [ 30.504550] vma_prepare+0xc54/0x11a0 [ 30.505025] __split_vma+0x5af/0x950 [ 30.505496] ? __pfx___split_vma+0x10/0x10 [ 30.506037] ? find_held_lock+0x2c/0x110 [ 30.506569] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.507146] ? lock_is_held_type+0x9f/0x120 [ 30.507685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.508295] ? mtree_range_walk+0x632/0x900 [ 30.508854] ? mas_walk+0x5c7/0x7c0 [ 30.509334] do_vmi_munmap+0x1f1/0x2b0 [ 30.509835] mmap_region+0x1f9/0x2660 [ 30.510323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.510842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.511554] ? __pfx_lock_acquire+0x10/0x10 [ 30.512084] ? __pfx_mmap_region+0x10/0x10 [ 30.512615] ? security_mmap_addr+0x7d/0xa0 [ 30.513145] ? get_unmapped_area+0x1f5/0x3f0 [ 30.513715] do_mmap+0x854/0xf00 [ 30.514158] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.514649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.515215] ksys_mmap_pgoff+0x3af/0x500 [ 30.515727] do_syscall_64+0x3f/0x90 [ 30.516209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.516856] RIP: 0033:0x7fc159aead82 [ 30.517317] 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 [ 30.519449] RSP: 002b:00007ffc502b0998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.520354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc159aead82 [ 30.521199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc158f24000 [ 30.522077] RBP: 00007fc158f24000 R08: 0000000000000009 R09: 0000000000001000 [ 30.522928] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa6b53ed90 [ 30.523775] R13: 00007ffc502b09b0 R14: 00007ffc502b09e0 R15: 00007ffc502b0d40 [ 30.524632] [ 30.524925] [ 30.525140] Allocated by task 214: [ 30.525573] kasan_save_stack+0x22/0x50 [ 30.526079] kasan_set_track+0x25/0x30 [ 30.526568] __kasan_slab_alloc+0x59/0x70 [ 30.527089] kmem_cache_alloc+0x16b/0x370 [ 30.527614] vm_area_dup+0x20/0x160 [ 30.528077] __split_vma+0x170/0x950 [ 30.528543] split_vma+0xc6/0x110 [ 30.528983] mprotect_fixup+0x8d2/0xb30 [ 30.529494] do_mprotect_pkey+0x87e/0xd40 [ 30.530035] __x64_sys_mprotect+0x78/0xc0 [ 30.530563] do_syscall_64+0x3f/0x90 [ 30.531042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.531685] [ 30.531902] Freed by task 13: [ 30.532298] kasan_save_stack+0x22/0x50 [ 30.532796] kasan_set_track+0x25/0x30 [ 30.533291] kasan_save_free_info+0x2b/0x50 [ 30.533830] __kasan_slab_free+0x10a/0x190 [ 30.534363] kmem_cache_free+0x10d/0x4d0 [ 30.534879] rcu_core+0x8c8/0x2860 [ 30.535321] __do_softirq+0x1b7/0x7d4 [ 30.535801] [ 30.536014] Last potentially related work creation: [ 30.536596] kasan_save_stack+0x22/0x50 [ 30.537097] __kasan_record_aux_stack+0x8e/0xa0 [ 30.537693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.538332] remove_vma+0x139/0x170 [ 30.538781] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.539340] do_vmi_munmap+0x1f1/0x2b0 [ 30.539820] __vm_munmap+0x138/0x3a0 [ 30.540286] __x64_sys_munmap+0x59/0x80 [ 30.540781] do_syscall_64+0x3f/0x90 [ 30.541256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.541959] [ 30.542182] The buggy address belongs to the object at ffff888010370828 [ 30.542182] which belongs to the cache vm_area_struct of size 168 [ 30.543936] The buggy address is located 88 bytes inside of [ 30.543936] freed 168-byte region [ffff888010370828, ffff8880103708d0) [ 30.545678] [ 30.545947] The buggy address belongs to the physical page: [ 30.546763] page:00000000e81735d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10370 [ 30.548098] memcg:ffff88800d5ba101 [ 30.548615] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.549406] page_type: 0xffffffff() [ 30.549966] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.551072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ba101 [ 30.552157] page dumped because: kasan: bad access detected [ 30.552960] [ 30.553220] Memory state around the buggy address: [ 30.553923] ffff888010370780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.554950] ffff888010370800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.555995] >ffff888010370880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.557027] ^ [ 30.557534] ffff888010370900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.558563] ffff888010370980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.559589] ================================================================== [ 30.560763] Disabling lock debugging due to kernel taint [ 32.375872] BUG: Bad rss-counter state mm:00000000eb82ec12 type:MM_FILEPAGES val:33 [ 32.376928] BUG: Bad rss-counter state mm:00000000eb82ec12 type:MM_ANONPAGES val:22 [ 32.871634] BUG: Bad rss-counter state mm:000000003d09e99d type:MM_FILEPAGES val:33 [ 32.872801] BUG: Bad rss-counter state mm:000000003d09e99d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61559' (ECDSA) to the list of known hosts. 2023/06/20 23:58:42 fuzzer started 2023/06/20 23:58:43 dialing manager at localhost:36067 2023/06/20 23:58:43 checking machine... 2023/06/20 23:58:43 checking revisions... [ 33.474906] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:58:43 testing simple program... [ 33.522822] cgroup: Unknown subsys name 'net' [ 33.556230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:58:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a1d6720 RCX=ffff88800844f780 RDX=ffffea0000687580 RSI=ffff88801a1d3e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff8880142c77b8 R8 =ffff88801a1d6980 R9 =0000000000000000 R10=ffffea00006874c0 R11=00000000800d0006 R12=dffffc0000000000 R13=ffff8880142c77f8 R14=ffff88800844f780 R15=ffff88801a1d3e40 RIP=ffffffff81810316 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 00007f5979b50900 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=00007f5978f97d30 CR3=000000000c6cc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=85b1158664803ebb00000000000ae988 XMM05=1edc6d9c2177ea370000000000133af8 XMM06=c291bd5c70af25b900000000001328e8 XMM07=fb795ef6d657705600000000001228d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff81132f82 RDX=dffffc0000000000 RSI=000000000000132f RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000607e R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 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 00007f26d386d900 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=00007ffdf5246000 CR3=0000000008cc8000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000