syzkaller login: [ 38.828842] BUG: Bad rss-counter state mm:00000000a8d25a40 type:MM_FILEPAGES val:33 [ 38.829874] BUG: Bad rss-counter state mm:00000000a8d25a40 type:MM_ANONPAGES val:22 [ 38.868436] ================================================================== [ 38.869363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.870451] Read of size 8 at addr ffff88800ca24310 by task sshd/225 [ 38.871214] [ 38.871432] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.872301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.873276] Call Trace: [ 38.873632] [ 38.873919] dump_stack_lvl+0x91/0xf0 [ 38.874414] print_report+0xcc/0x620 [ 38.874899] ? __virt_addr_valid+0x102/0x340 [ 38.875452] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876078] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876698] kasan_report+0xbe/0xf0 [ 38.877174] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877792] vma_interval_tree_remove+0xc75/0xec0 [ 38.878393] vma_prepare+0xc54/0x11a0 [ 38.878864] __split_vma+0x5af/0x950 [ 38.879332] ? __pfx___split_vma+0x10/0x10 [ 38.879852] ? find_held_lock+0x2c/0x110 [ 38.880368] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.880932] ? lock_is_held_type+0x9f/0x120 [ 38.881476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.882085] ? mtree_range_walk+0x632/0x900 [ 38.882633] ? mas_walk+0x5c7/0x7c0 [ 38.883107] do_vmi_munmap+0x1f1/0x2b0 [ 38.883597] mmap_region+0x1f9/0x2660 [ 38.884082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.884586] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.885298] ? __pfx_lock_acquire+0x10/0x10 [ 38.885842] ? __pfx_mmap_region+0x10/0x10 [ 38.886366] ? security_mmap_addr+0x7d/0xa0 [ 38.886896] ? get_unmapped_area+0x1f5/0x3f0 [ 38.887441] do_mmap+0x854/0xf00 [ 38.887881] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.888371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.888931] ksys_mmap_pgoff+0x3af/0x500 [ 38.889439] do_syscall_64+0x3f/0x90 [ 38.889929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.890577] RIP: 0033:0x7fc08ac32d82 [ 38.891044] 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 [ 38.893163] RSP: 002b:00007ffe22dec0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.894076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc08ac32d82 [ 38.894918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc08a06c000 [ 38.895948] RBP: 00007fc08a06c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.896791] R10: 0000000000000812 R11: 0000000000000206 R12: 000056544f407b20 [ 38.897649] R13: 00007ffe22dec100 R14: 00007ffe22dec130 R15: 00007ffe22dec490 [ 38.898506] [ 38.898800] [ 38.899017] Allocated by task 218: [ 38.899443] kasan_save_stack+0x22/0x50 [ 38.899943] kasan_set_track+0x25/0x30 [ 38.900432] __kasan_slab_alloc+0x59/0x70 [ 38.900960] kmem_cache_alloc+0x16b/0x370 [ 38.901484] vm_area_dup+0x20/0x160 [ 38.901939] __split_vma+0x170/0x950 [ 38.902399] split_vma+0xc6/0x110 [ 38.902839] mprotect_fixup+0x8d2/0xb30 [ 38.903340] do_mprotect_pkey+0x87e/0xd40 [ 38.903858] __x64_sys_mprotect+0x78/0xc0 [ 38.904380] do_syscall_64+0x3f/0x90 [ 38.904851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905494] [ 38.905711] Freed by task 218: [ 38.906096] kasan_save_stack+0x22/0x50 [ 38.906596] kasan_set_track+0x25/0x30 [ 38.907084] kasan_save_free_info+0x2b/0x50 [ 38.907611] __kasan_slab_free+0x10a/0x190 [ 38.908137] kmem_cache_free+0x10d/0x4d0 [ 38.908645] rcu_core+0x8c8/0x2860 [ 38.909086] __do_softirq+0x1b7/0x7d4 [ 38.909569] [ 38.909783] Last potentially related work creation: [ 38.910364] kasan_save_stack+0x22/0x50 [ 38.910864] __kasan_record_aux_stack+0x8e/0xa0 [ 38.911432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.912073] remove_vma+0x139/0x170 [ 38.912521] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.913074] do_vmi_munmap+0x1f1/0x2b0 [ 38.913572] __vm_munmap+0x138/0x3a0 [ 38.914038] __x64_sys_munmap+0x59/0x80 [ 38.914533] do_syscall_64+0x3f/0x90 [ 38.915006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915643] [ 38.915860] The buggy address belongs to the object at ffff88800ca242b8 [ 38.915860] which belongs to the cache vm_area_struct of size 168 [ 38.917299] The buggy address is located 88 bytes inside of [ 38.917299] freed 168-byte region [ffff88800ca242b8, ffff88800ca24360) [ 38.918702] [ 38.918919] The buggy address belongs to the physical page: [ 38.919579] page:000000004f316285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca24 [ 38.920650] memcg:ffff88800f7b5201 [ 38.921071] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.921740] page_type: 0xffffffff() [ 38.922188] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.923093] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7b5201 [ 38.923992] page dumped because: kasan: bad access detected [ 38.924647] [ 38.924863] Memory state around the buggy address: [ 38.925441] ffff88800ca24200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.926295] ffff88800ca24280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.927140] >ffff88800ca24300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.927998] ^ [ 38.928467] ffff88800ca24380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.929319] ffff88800ca24400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.930180] ================================================================== [ 38.931256] Disabling lock debugging due to kernel taint [ 40.817182] BUG: Bad rss-counter state mm:00000000ad8a2c67 type:MM_FILEPAGES val:33 [ 40.817887] BUG: Bad rss-counter state mm:00000000ad8a2c67 type:MM_ANONPAGES val:22 [ 41.208640] BUG: Bad rss-counter state mm:000000000784ca8d type:MM_FILEPAGES val:33 [ 41.210472] BUG: Bad rss-counter state mm:000000000784ca8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37767' (ECDSA) to the list of known hosts. 2023/06/20 16:06:54 fuzzer started 2023/06/20 16:06:54 dialing manager at localhost:36067 2023/06/20 16:06:54 checking machine... 2023/06/20 16:06:54 checking revisions... [ 41.905406] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:06:54 testing simple program... [ 41.955211] cgroup: Unknown subsys name 'net' [ 42.052235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:54 Registers: info registers vcpu 0 RAX=ffffffff861386ff RBX=0000000000000001 RCX=ffffffff861386fa RDX=0000000000000000 RSI=1ffffffff0c270df RDI=ffffffff85dfdb08 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff861386ee R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020c51 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130a5b RFL=00000213 [----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 00007fefad0cc900 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=0000563acc8f6768 CR3=000000000c602000 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=d6a9f80d221400c600000000000ae988 XMM05=7ef597e8063040b600000000001332e0 XMM06=6860aeb314f8829d00000000001323f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019e018f RBX=ffff88800cf00c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cf00c78 RBP=ffff88800cf293a0 RSP=ffff88800d77fba8 R8 =0000000000000001 R9 =ffffed1001aeff69 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800cf23000 R14=ffffffff8364b5f9 R15=ffff88800909bd80 RIP=ffffffff818464e2 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 00007f8d0772d900 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=00007ffdb3d415a8 CR3=000000000fca4000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000