syzkaller login: [ 32.358855] BUG: Bad rss-counter state mm:0000000039d0207d type:MM_FILEPAGES val:33 [ 32.359927] BUG: Bad rss-counter state mm:0000000039d0207d type:MM_ANONPAGES val:22 [ 32.527238] ================================================================== [ 32.528257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.529316] Read of size 8 at addr ffff88801a379140 by task sshd/221 [ 32.530306] [ 32.530553] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.531520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.532609] Call Trace: [ 32.532978] [ 32.533316] dump_stack_lvl+0x91/0xf0 [ 32.533860] print_report+0xcc/0x620 [ 32.534405] ? __virt_addr_valid+0x102/0x340 [ 32.535022] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.535717] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.536411] kasan_report+0xbe/0xf0 [ 32.536942] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.537656] vma_interval_tree_remove+0xc75/0xec0 [ 32.538334] vma_prepare+0xc54/0x11a0 [ 32.538873] __split_vma+0x5af/0x950 [ 32.539403] ? __pfx___split_vma+0x10/0x10 [ 32.539998] ? find_held_lock+0x2c/0x110 [ 32.540586] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.541224] ? lock_is_held_type+0x9f/0x120 [ 32.541835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.542521] ? mtree_range_walk+0x632/0x900 [ 32.543136] ? mas_walk+0x5c7/0x7c0 [ 32.543674] do_vmi_munmap+0x1f1/0x2b0 [ 32.544227] mmap_region+0x1f9/0x2660 [ 32.544773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.545372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.546172] ? __pfx_lock_acquire+0x10/0x10 [ 32.546770] ? __pfx_mmap_region+0x10/0x10 [ 32.547375] ? security_mmap_addr+0x7d/0xa0 [ 32.547964] ? get_unmapped_area+0x1f5/0x3f0 [ 32.548587] do_mmap+0x854/0xf00 [ 32.549078] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.549657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.550296] ksys_mmap_pgoff+0x3af/0x500 [ 32.550863] do_syscall_64+0x3f/0x90 [ 32.551395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.552123] RIP: 0033:0x7fb70e503d82 [ 32.552641] 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 [ 32.555041] RSP: 002b:00007ffc21047358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.556063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb70e503d82 [ 32.557009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb70d93d000 [ 32.557976] RBP: 00007fb70d93d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.558925] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d97cb39b20 [ 32.559878] R13: 00007ffc21047370 R14: 00007ffc210473a0 R15: 00007ffc21047700 [ 32.560855] [ 32.561185] [ 32.561448] Allocated by task 214: [ 32.561932] kasan_save_stack+0x22/0x50 [ 32.562502] kasan_set_track+0x25/0x30 [ 32.563059] __kasan_slab_alloc+0x59/0x70 [ 32.563642] kmem_cache_alloc+0x16b/0x370 [ 32.564223] vm_area_dup+0x20/0x160 [ 32.564724] __split_vma+0x170/0x950 [ 32.565256] split_vma+0xc6/0x110 [ 32.565752] mprotect_fixup+0x8d2/0xb30 [ 32.566322] do_mprotect_pkey+0x87e/0xd40 [ 32.566922] __x64_sys_mprotect+0x78/0xc0 [ 32.567510] do_syscall_64+0x3f/0x90 [ 32.568043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.568759] [ 32.569007] Freed by task 214: [ 32.569455] kasan_save_stack+0x22/0x50 [ 32.570020] kasan_set_track+0x25/0x30 [ 32.570566] kasan_save_free_info+0x2b/0x50 [ 32.571168] __kasan_slab_free+0x10a/0x190 [ 32.571758] kmem_cache_free+0x10d/0x4d0 [ 32.572353] rcu_core+0x8c8/0x2860 [ 32.572851] __do_softirq+0x1b7/0x7d4 [ 32.573414] [ 32.573653] Last potentially related work creation: [ 32.574325] kasan_save_stack+0x22/0x50 [ 32.574888] __kasan_record_aux_stack+0x8e/0xa0 [ 32.575531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.576252] remove_vma+0x139/0x170 [ 32.576759] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.577397] do_vmi_munmap+0x1f1/0x2b0 [ 32.577948] __vm_munmap+0x138/0x3a0 [ 32.578470] __x64_sys_munmap+0x59/0x80 [ 32.579030] do_syscall_64+0x3f/0x90 [ 32.579572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.580288] [ 32.580541] The buggy address belongs to the object at ffff88801a3790e8 [ 32.580541] which belongs to the cache vm_area_struct of size 168 [ 32.582219] The buggy address is located 88 bytes inside of [ 32.582219] freed 168-byte region [ffff88801a3790e8, ffff88801a379190) [ 32.583791] [ 32.584038] The buggy address belongs to the physical page: [ 32.584774] page:00000000eab81ff0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a379 [ 32.586014] memcg:ffff88800e7fc401 [ 32.586503] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.587225] page_type: 0xffffffff() [ 32.587736] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.588777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7fc401 [ 32.589812] page dumped because: kasan: bad access detected [ 32.590555] [ 32.590801] Memory state around the buggy address: [ 32.591450] ffff88801a379000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.592407] ffff88801a379080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.593388] >ffff88801a379100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.594349] ^ [ 32.595070] ffff88801a379180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.596040] ffff88801a379200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.597003] ================================================================== [ 32.598175] Disabling lock debugging due to kernel taint [ 34.814105] BUG: Bad rss-counter state mm:00000000fa87a21b type:MM_FILEPAGES val:33 [ 34.815512] BUG: Bad rss-counter state mm:00000000fa87a21b type:MM_ANONPAGES val:22 [ 35.304238] BUG: Bad rss-counter state mm:00000000bc1f397c type:MM_FILEPAGES val:33 [ 35.305304] BUG: Bad rss-counter state mm:00000000bc1f397c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48919' (ECDSA) to the list of known hosts. 2023/06/19 15:03:54 fuzzer started 2023/06/19 15:03:54 dialing manager at localhost:44161 2023/06/19 15:03:54 checking machine... 2023/06/19 15:03:54 checking revisions... [ 36.029220] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:03:54 testing simple program... [ 36.072808] cgroup: Unknown subsys name 'net' [ 36.113135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:03:52 Registers: info registers vcpu 0 RAX=00000016f628b340 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=00000000000541ee RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0cbe R11=0000000000000001 R12=00000000000541ee R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 00007fd1c60f2700 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=00007f5e41cfe650 CR3=000000000970e000 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=2034353a33303a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33303a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff88806cf09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000001 R13=0000000000000000 R14=ffff888014703680 R15=ffff88800da06b80 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007ffb6ddbb900 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=00007ffb6d220130 CR3=000000000d77a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ca39344fbc469bac00000000000ae988 XMM05=60b69c9ab39b56640000000000135688 XMM06=e4cb8bb95a7664b60000000000134520 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000