syzkaller login: [ 33.878050] BUG: Bad rss-counter state mm:000000007cf0156a type:MM_FILEPAGES val:33 [ 33.879245] BUG: Bad rss-counter state mm:000000007cf0156a type:MM_ANONPAGES val:22 [ 33.918359] ================================================================== [ 33.919276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.920247] Read of size 8 at addr ffff88800ee3f798 by task sshd/220 [ 33.921124] [ 33.921345] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.922227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.923211] Call Trace: [ 33.923546] [ 33.923841] dump_stack_lvl+0x91/0xf0 [ 33.924332] print_report+0xcc/0x620 [ 33.924828] ? __virt_addr_valid+0x102/0x340 [ 33.925371] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.925990] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.926616] kasan_report+0xbe/0xf0 [ 33.927095] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.927741] vma_interval_tree_remove+0xc75/0xec0 [ 33.928343] vma_prepare+0xc54/0x11a0 [ 33.928814] __split_vma+0x5af/0x950 [ 33.929289] ? __pfx___split_vma+0x10/0x10 [ 33.929818] ? find_held_lock+0x2c/0x110 [ 33.930344] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.930899] ? lock_is_held_type+0x9f/0x120 [ 33.931428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.932061] ? mtree_range_walk+0x632/0x900 [ 33.932607] ? mas_walk+0x5c7/0x7c0 [ 33.933076] do_vmi_munmap+0x1f1/0x2b0 [ 33.933567] mmap_region+0x1f9/0x2660 [ 33.934045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.934560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.935274] ? __pfx_lock_acquire+0x10/0x10 [ 33.935814] ? __pfx_mmap_region+0x10/0x10 [ 33.936340] ? security_mmap_addr+0x7d/0xa0 [ 33.936864] ? get_unmapped_area+0x1f5/0x3f0 [ 33.937412] do_mmap+0x854/0xf00 [ 33.937860] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.938353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.938909] ksys_mmap_pgoff+0x3af/0x500 [ 33.939414] do_syscall_64+0x3f/0x90 [ 33.939912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.940573] RIP: 0033:0x7f806951ad82 [ 33.941030] 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 [ 33.943139] RSP: 002b:00007ffe03a40898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.944042] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f806951ad82 [ 33.944887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8068954000 [ 33.945728] RBP: 00007f8068954000 R08: 0000000000000009 R09: 0000000000001000 [ 33.946570] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645b59acec0 [ 33.947404] R13: 00007ffe03a408b0 R14: 00007ffe03a408e0 R15: 00007ffe03a40c40 [ 33.948279] [ 33.948570] [ 33.948783] Allocated by task 213: [ 33.949206] kasan_save_stack+0x22/0x50 [ 33.949711] kasan_set_track+0x25/0x30 [ 33.950203] __kasan_slab_alloc+0x59/0x70 [ 33.950721] kmem_cache_alloc+0x16b/0x370 [ 33.951238] vm_area_dup+0x20/0x160 [ 33.951695] __split_vma+0x170/0x950 [ 33.952156] split_vma+0xc6/0x110 [ 33.952600] mprotect_fixup+0x8d2/0xb30 [ 33.953104] do_mprotect_pkey+0x87e/0xd40 [ 33.953619] __x64_sys_mprotect+0x78/0xc0 [ 33.954143] do_syscall_64+0x3f/0x90 [ 33.954616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.955259] [ 33.955472] Freed by task 213: [ 33.955892] kasan_save_stack+0x22/0x50 [ 33.956395] kasan_set_track+0x25/0x30 [ 33.956881] kasan_save_free_info+0x2b/0x50 [ 33.957418] __kasan_slab_free+0x10a/0x190 [ 33.957961] kmem_cache_free+0x10d/0x4d0 [ 33.958470] rcu_core+0x8c8/0x2860 [ 33.958921] __do_softirq+0x1b7/0x7d4 [ 33.959390] [ 33.959616] Last potentially related work creation: [ 33.960195] kasan_save_stack+0x22/0x50 [ 33.960695] __kasan_record_aux_stack+0x8e/0xa0 [ 33.961260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.961896] remove_vma+0x139/0x170 [ 33.962343] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.962893] do_vmi_munmap+0x1f1/0x2b0 [ 33.963375] __vm_munmap+0x138/0x3a0 [ 33.963855] __x64_sys_munmap+0x59/0x80 [ 33.964348] do_syscall_64+0x3f/0x90 [ 33.964813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.965457] [ 33.965674] Second to last potentially related work creation: [ 33.966352] kasan_save_stack+0x22/0x50 [ 33.966852] __kasan_record_aux_stack+0x8e/0xa0 [ 33.967431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.968085] remove_vma+0x139/0x170 [ 33.968536] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.969092] do_vmi_munmap+0x1f1/0x2b0 [ 33.969578] mmap_region+0x1f9/0x2660 [ 33.970052] do_mmap+0x854/0xf00 [ 33.970485] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.970969] ksys_mmap_pgoff+0x3af/0x500 [ 33.971470] do_syscall_64+0x3f/0x90 [ 33.971949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.972590] [ 33.972803] The buggy address belongs to the object at ffff88800ee3f740 [ 33.972803] which belongs to the cache vm_area_struct of size 168 [ 33.974266] The buggy address is located 88 bytes inside of [ 33.974266] freed 168-byte region [ffff88800ee3f740, ffff88800ee3f7e8) [ 33.975677] [ 33.975894] The buggy address belongs to the physical page: [ 33.976550] page:00000000cd09d5f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee3f [ 33.977629] memcg:ffff88800e30a201 [ 33.978070] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.978726] page_type: 0xffffffff() [ 33.979196] raw: 0100000000000200 ffff88800879fc80 ffffea000035d780 dead000000000002 [ 33.980147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e30a201 [ 33.981067] page dumped because: kasan: bad access detected [ 33.981741] [ 33.981962] Memory state around the buggy address: [ 33.982564] ffff88800ee3f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.983435] ffff88800ee3f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.984324] >ffff88800ee3f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.985201] ^ [ 33.985710] ffff88800ee3f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.986561] ffff88800ee3f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.987401] ================================================================== [ 33.988521] Disabling lock debugging due to kernel taint [ 36.162206] BUG: Bad rss-counter state mm:00000000ad71776b type:MM_FILEPAGES val:33 [ 36.163296] BUG: Bad rss-counter state mm:00000000ad71776b type:MM_ANONPAGES val:22 [ 36.640970] BUG: Bad rss-counter state mm:00000000ace55b8a type:MM_FILEPAGES val:33 [ 36.641792] BUG: Bad rss-counter state mm:00000000ace55b8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39871' (ECDSA) to the list of known hosts. 2023/06/20 09:33:10 fuzzer started 2023/06/20 09:33:10 dialing manager at localhost:44161 2023/06/20 09:33:10 checking machine... 2023/06/20 09:33:10 checking revisions... [ 37.353029] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:33:10 testing simple program... [ 37.405041] cgroup: Unknown subsys name 'net' [ 37.454637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028c5eae RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88801462f558 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f9845b9a900 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=00007f9844ffa500 CR3=000000000f134000 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=46fa9bbbec111c1100000000000ae988 XMM05=570a4526a0e0120f0000000000135a48 XMM06=4fda316b135da52b00000000001344c8 XMM07=fb795ef6d657705600000000001236f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf2baa8 RBX=1ffff1100d9e5755 RCX=ffff88806cf2bba8 RDX=ffff88806cf2bb28 RSI=ffff88806cf2baa8 RDI=ffff88806cf2b988 RBP=ffff88806cf28140 RSP=ffff88806cf09f38 R8 =0000000000000001 R9 =ffffed100d9e13d6 R10=0000000000000003 R11=ffff88806cf09ff8 R12=0000000000000046 R13=ffff88806cf2b98c R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff813cb3f4 RFL=00000016 [----AP-] 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 00007f3de8f4f900 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=00007fff88dfd000 CR3=000000000d992000 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=2039303a33333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a33333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000