syzkaller login: [ 36.326799] BUG: Bad rss-counter state mm:00000000f08b2bea type:MM_FILEPAGES val:33 [ 36.328043] BUG: Bad rss-counter state mm:00000000f08b2bea type:MM_ANONPAGES val:22 [ 36.365045] ================================================================== [ 36.366055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.367091] Read of size 8 at addr ffff88800c704798 by task sshd/227 [ 36.367860] [ 36.368079] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.368955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.369943] Call Trace: [ 36.370259] [ 36.370549] dump_stack_lvl+0x91/0xf0 [ 36.371046] print_report+0xcc/0x620 [ 36.371537] ? __virt_addr_valid+0x102/0x340 [ 36.372092] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.372713] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.373336] kasan_report+0xbe/0xf0 [ 36.373827] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.374475] vma_interval_tree_remove+0xc75/0xec0 [ 36.375093] vma_prepare+0xc54/0x11a0 [ 36.375595] __split_vma+0x5af/0x950 [ 36.376089] ? __pfx___split_vma+0x10/0x10 [ 36.376653] ? find_held_lock+0x2c/0x110 [ 36.377193] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.377783] ? lock_is_held_type+0x9f/0x120 [ 36.378347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.378980] ? mtree_range_walk+0x632/0x900 [ 36.379555] ? mas_walk+0x5c7/0x7c0 [ 36.380050] do_vmi_munmap+0x1f1/0x2b0 [ 36.380569] mmap_region+0x1f9/0x2660 [ 36.381068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.381598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.382338] ? __pfx_lock_acquire+0x10/0x10 [ 36.382894] ? __pfx_mmap_region+0x10/0x10 [ 36.383440] ? security_mmap_addr+0x7d/0xa0 [ 36.383995] ? get_unmapped_area+0x1f5/0x3f0 [ 36.384583] do_mmap+0x854/0xf00 [ 36.385039] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.385552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.386138] ksys_mmap_pgoff+0x3af/0x500 [ 36.386660] do_syscall_64+0x3f/0x90 [ 36.387154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.387828] RIP: 0033:0x7fea894bad82 [ 36.388309] 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 [ 36.390530] RSP: 002b:00007fff128dd498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.391479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea894bad82 [ 36.392370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea888f4000 [ 36.393253] RBP: 00007fea888f4000 R08: 0000000000000009 R09: 0000000000001000 [ 36.394134] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600b4245ec0 [ 36.395016] R13: 00007fff128dd4b0 R14: 00007fff128dd4e0 R15: 00007fff128dd840 [ 36.395914] [ 36.396215] [ 36.396604] Allocated by task 220: [ 36.397148] kasan_save_stack+0x22/0x50 [ 36.397781] kasan_set_track+0x25/0x30 [ 36.398384] __kasan_slab_alloc+0x59/0x70 [ 36.399026] kmem_cache_alloc+0x16b/0x370 [ 36.399634] vm_area_dup+0x20/0x160 [ 36.400172] __split_vma+0x170/0x950 [ 36.400728] split_vma+0xc6/0x110 [ 36.401246] mprotect_fixup+0x8d2/0xb30 [ 36.401832] do_mprotect_pkey+0x87e/0xd40 [ 36.402438] __x64_sys_mprotect+0x78/0xc0 [ 36.403047] do_syscall_64+0x3f/0x90 [ 36.403597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.404370] [ 36.404620] Freed by task 220: [ 36.405092] kasan_save_stack+0x22/0x50 [ 36.405585] kasan_set_track+0x25/0x30 [ 36.406053] kasan_save_free_info+0x2b/0x50 [ 36.406554] __kasan_slab_free+0x10a/0x190 [ 36.407060] kmem_cache_free+0x10d/0x4d0 [ 36.407544] rcu_core+0x8c8/0x2860 [ 36.407968] __do_softirq+0x1b7/0x7d4 [ 36.408441] [ 36.408654] Last potentially related work creation: [ 36.409219] kasan_save_stack+0x22/0x50 [ 36.409707] __kasan_record_aux_stack+0x8e/0xa0 [ 36.410280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.410903] remove_vma+0x139/0x170 [ 36.411355] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.411893] do_vmi_munmap+0x1f1/0x2b0 [ 36.412376] __vm_munmap+0x138/0x3a0 [ 36.412836] __x64_sys_munmap+0x59/0x80 [ 36.413327] do_syscall_64+0x3f/0x90 [ 36.413787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.414412] [ 36.414615] The buggy address belongs to the object at ffff88800c704740 [ 36.414615] which belongs to the cache vm_area_struct of size 168 [ 36.416031] The buggy address is located 88 bytes inside of [ 36.416031] freed 168-byte region [ffff88800c704740, ffff88800c7047e8) [ 36.417370] [ 36.417574] The buggy address belongs to the physical page: [ 36.418194] page:0000000059de3f78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc704 [ 36.419212] memcg:ffff888016c63301 [ 36.419613] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.420221] page_type: 0xffffffff() [ 36.420653] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.421525] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c63301 [ 36.422381] page dumped because: kasan: bad access detected [ 36.423000] [ 36.423203] Memory state around the buggy address: [ 36.423749] ffff88800c704680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.424570] ffff88800c704700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.425391] >ffff88800c704780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.426240] ^ [ 36.426734] ffff88800c704800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.427584] ffff88800c704880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.428444] ================================================================== [ 36.429635] Disabling lock debugging due to kernel taint [ 38.424000] BUG: Bad rss-counter state mm:0000000061703814 type:MM_FILEPAGES val:33 [ 38.425042] BUG: Bad rss-counter state mm:0000000061703814 type:MM_ANONPAGES val:22 [ 38.863886] BUG: Bad rss-counter state mm:0000000000d7393c type:MM_FILEPAGES val:33 [ 38.865078] BUG: Bad rss-counter state mm:0000000000d7393c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17315' (ECDSA) to the list of known hosts. 2023/06/21 04:07:34 fuzzer started 2023/06/21 04:07:34 dialing manager at localhost:36067 2023/06/21 04:07:34 checking machine... 2023/06/21 04:07:34 checking revisions... [ 39.571913] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:07:34 testing simple program... [ 39.625012] cgroup: Unknown subsys name 'net' [ 39.687255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028efeeb RCX=0000000000000000 RDX=ffff888013a73680 RSI=ffffffff818becad RDI=ffff888016467ba0 RBP=ffff888016467ba8 RSP=ffff88801477f758 R8 =ffff888016467ba8 R9 =ffff88801477f8d0 R10=0000000000000003 R11=0000000000000001 R12=00000000000000c3 R13=0000000000000001 R14=0000000000000010 R15=0000000000000019 RIP=ffffffff818beccd 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 00007efdfbbd6900 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=00007f33ad36d650 CR3=000000000d95e000 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=44d8b4d3626b33ca00000000000ae988 XMM05=69cb3a21233760d400000000001330b0 XMM06=16bbfc4fa606b6250000000000131bf8 XMM07=fb795ef6d65770560000000000122100 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007ffee0d8c608 CR3=0000000010230000 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=2034333a37303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000