syzkaller login: [ 38.818060] BUG: Bad rss-counter state mm:00000000322d43c0 type:MM_FILEPAGES val:33 [ 38.818803] BUG: Bad rss-counter state mm:00000000322d43c0 type:MM_ANONPAGES val:22 [ 38.854846] ================================================================== [ 38.855865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.856847] Read of size 8 at addr ffff8880097633f8 by task sshd/220 [ 38.857642] [ 38.857869] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.858769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.859774] Call Trace: [ 38.860106] [ 38.860396] dump_stack_lvl+0x91/0xf0 [ 38.860911] print_report+0xcc/0x620 [ 38.861413] ? __virt_addr_valid+0x102/0x340 [ 38.861977] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862611] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863249] kasan_report+0xbe/0xf0 [ 38.863830] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.864474] vma_interval_tree_remove+0xc75/0xec0 [ 38.865095] vma_prepare+0xc54/0x11a0 [ 38.865599] __split_vma+0x5af/0x950 [ 38.866101] ? __pfx___split_vma+0x10/0x10 [ 38.866669] ? find_held_lock+0x2c/0x110 [ 38.867211] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.867811] ? lock_is_held_type+0x9f/0x120 [ 38.868381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.869005] ? mtree_range_walk+0x632/0x900 [ 38.869579] ? mas_walk+0x5c7/0x7c0 [ 38.870081] do_vmi_munmap+0x1f1/0x2b0 [ 38.870597] mmap_region+0x1f9/0x2660 [ 38.871100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.871639] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.872379] ? __pfx_lock_acquire+0x10/0x10 [ 38.872929] ? __pfx_mmap_region+0x10/0x10 [ 38.873480] ? security_mmap_addr+0x7d/0xa0 [ 38.874046] ? get_unmapped_area+0x1f5/0x3f0 [ 38.874638] do_mmap+0x854/0xf00 [ 38.875087] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.875603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.876181] ksys_mmap_pgoff+0x3af/0x500 [ 38.876707] do_syscall_64+0x3f/0x90 [ 38.877209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877891] RIP: 0033:0x7fbd8b6aad82 [ 38.878367] 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 [ 38.880616] RSP: 002b:00007ffd9b514718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.881562] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd8b6aad82 [ 38.882440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd8aae4000 [ 38.883364] RBP: 00007fbd8aae4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.884238] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558f5d70ec0 [ 38.885124] R13: 00007ffd9b514730 R14: 00007ffd9b514760 R15: 00007ffd9b514ac0 [ 38.886014] [ 38.886318] [ 38.886555] Allocated by task 213: [ 38.887002] kasan_save_stack+0x22/0x50 [ 38.887528] kasan_set_track+0x25/0x30 [ 38.888036] __kasan_slab_alloc+0x59/0x70 [ 38.888594] kmem_cache_alloc+0x16b/0x370 [ 38.889135] vm_area_dup+0x20/0x160 [ 38.889628] __split_vma+0x170/0x950 [ 38.890118] split_vma+0xc6/0x110 [ 38.890582] mprotect_fixup+0x8d2/0xb30 [ 38.891119] do_mprotect_pkey+0x87e/0xd40 [ 38.891665] __x64_sys_mprotect+0x78/0xc0 [ 38.892209] do_syscall_64+0x3f/0x90 [ 38.892702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893378] [ 38.893594] Freed by task 213: [ 38.893997] kasan_save_stack+0x22/0x50 [ 38.894547] kasan_set_track+0x25/0x30 [ 38.895064] kasan_save_free_info+0x2b/0x50 [ 38.895614] __kasan_slab_free+0x10a/0x190 [ 38.896177] kmem_cache_free+0x10d/0x4d0 [ 38.896707] rcu_core+0x8c8/0x2860 [ 38.897172] __do_softirq+0x1b7/0x7d4 [ 38.897667] [ 38.897885] Last potentially related work creation: [ 38.898498] kasan_save_stack+0x22/0x50 [ 38.899020] __kasan_record_aux_stack+0x8e/0xa0 [ 38.899621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.900283] remove_vma+0x139/0x170 [ 38.900759] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.901337] do_vmi_munmap+0x1f1/0x2b0 [ 38.901849] __vm_munmap+0x138/0x3a0 [ 38.902338] __x64_sys_munmap+0x59/0x80 [ 38.902869] do_syscall_64+0x3f/0x90 [ 38.903370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904043] [ 38.904264] The buggy address belongs to the object at ffff8880097633a0 [ 38.904264] which belongs to the cache vm_area_struct of size 168 [ 38.905779] The buggy address is located 88 bytes inside of [ 38.905779] freed 168-byte region [ffff8880097633a0, ffff888009763448) [ 38.907246] [ 38.907468] The buggy address belongs to the physical page: [ 38.908147] page:00000000fd0d8456 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9763 [ 38.909268] memcg:ffff88800e9e6d01 [ 38.909711] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.910385] page_type: 0xffffffff() [ 38.910867] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.911822] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9e6d01 [ 38.912785] page dumped because: kasan: bad access detected [ 38.913478] [ 38.913700] Memory state around the buggy address: [ 38.914289] ffff888009763280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.915194] ffff888009763300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.916095] >ffff888009763380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.916972] ^ [ 38.917844] ffff888009763400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.918732] ffff888009763480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.919624] ================================================================== [ 38.920748] Disabling lock debugging due to kernel taint [ 40.954273] BUG: Bad rss-counter state mm:000000004155bd1f type:MM_FILEPAGES val:33 [ 40.955301] BUG: Bad rss-counter state mm:000000004155bd1f type:MM_ANONPAGES val:22 [ 41.467923] BUG: Bad rss-counter state mm:0000000031677203 type:MM_FILEPAGES val:33 [ 41.469162] BUG: Bad rss-counter state mm:0000000031677203 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35654' (ECDSA) to the list of known hosts. 2023/06/20 16:47:15 fuzzer started 2023/06/20 16:47:15 dialing manager at localhost:36067 2023/06/20 16:47:15 checking machine... 2023/06/20 16:47:15 checking revisions... [ 42.200346] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:47:15 testing simple program... [ 42.252038] cgroup: Unknown subsys name 'net' [ 42.315329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:47:15 Registers: info registers vcpu 0 RAX=0000000000020d8f RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=0000000000020d9d RSI=00000000000080c6 RDI=ffffffff86138eb6 RBP=ffff8880101ef9b0 RSP=ffff8880101ef8e8 R8 =ffffffff86138e62 R9 =ffff8880101ef998 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880101ef9b8 R13=ffff8880101ef9a0 R14=ffff8880101ef999 R15=ffff8880101ef958 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 00007fb554055900 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=00007fff25096000 CR3=000000000dcc8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000002 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c13012 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86098096 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff81131127 RFL=00000217 [----APC] 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 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=00007f412a788a70 CR3=0000000019e58000 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=37343a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303437 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000