syzkaller login: [ 38.732721] BUG: Bad rss-counter state mm:00000000c060d55e type:MM_FILEPAGES val:33 [ 38.734482] BUG: Bad rss-counter state mm:00000000c060d55e type:MM_ANONPAGES val:22 [ 38.892660] ================================================================== [ 38.893560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.894485] Read of size 8 at addr ffff88800da5e968 by task sshd/226 [ 38.895261] [ 38.895480] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.896489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.897454] Call Trace: [ 38.897769] [ 38.898048] dump_stack_lvl+0x91/0xf0 [ 38.898656] print_report+0xcc/0x620 [ 38.899258] ? __virt_addr_valid+0x102/0x340 [ 38.899901] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900632] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.901354] kasan_report+0xbe/0xf0 [ 38.901915] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902647] vma_interval_tree_remove+0xc75/0xec0 [ 38.903370] vma_prepare+0xc54/0x11a0 [ 38.903936] __split_vma+0x5af/0x950 [ 38.904483] ? __pfx___split_vma+0x10/0x10 [ 38.905101] ? find_held_lock+0x2c/0x110 [ 38.905721] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.906387] ? lock_is_held_type+0x9f/0x120 [ 38.907024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.907714] ? mtree_range_walk+0x632/0x900 [ 38.908264] ? mas_walk+0x5c7/0x7c0 [ 38.908736] do_vmi_munmap+0x1f1/0x2b0 [ 38.909220] mmap_region+0x1f9/0x2660 [ 38.909700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.910205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.910905] ? __pfx_lock_acquire+0x10/0x10 [ 38.911440] ? __pfx_mmap_region+0x10/0x10 [ 38.911965] ? security_mmap_addr+0x7d/0xa0 [ 38.912495] ? get_unmapped_area+0x1f5/0x3f0 [ 38.913034] do_mmap+0x854/0xf00 [ 38.913471] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.913963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.914514] ksys_mmap_pgoff+0x3af/0x500 [ 38.915016] do_syscall_64+0x3f/0x90 [ 38.915501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916144] RIP: 0033:0x7f6d10b6ed82 [ 38.916600] 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 [ 38.918710] RSP: 002b:00007ffd378a3678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.919647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d10b6ed82 [ 38.920505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d0ffa8000 [ 38.921345] RBP: 00007f6d0ffa8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.922184] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3d96ddec0 [ 38.923039] R13: 00007ffd378a3690 R14: 00007ffd378a36c0 R15: 00007ffd378a3a20 [ 38.923885] [ 38.924179] [ 38.924396] Allocated by task 219: [ 38.924821] kasan_save_stack+0x22/0x50 [ 38.925326] kasan_set_track+0x25/0x30 [ 38.925818] __kasan_slab_alloc+0x59/0x70 [ 38.926345] kmem_cache_alloc+0x16b/0x370 [ 38.926865] vm_area_dup+0x20/0x160 [ 38.927341] __split_vma+0x170/0x950 [ 38.927807] split_vma+0xc6/0x110 [ 38.928241] mprotect_fixup+0x8d2/0xb30 [ 38.928741] do_mprotect_pkey+0x87e/0xd40 [ 38.929262] __x64_sys_mprotect+0x78/0xc0 [ 38.929778] do_syscall_64+0x3f/0x90 [ 38.930253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930888] [ 38.931112] Freed by task 219: [ 38.931501] kasan_save_stack+0x22/0x50 [ 38.932004] kasan_set_track+0x25/0x30 [ 38.932491] kasan_save_free_info+0x2b/0x50 [ 38.933025] __kasan_slab_free+0x10a/0x190 [ 38.933549] kmem_cache_free+0x10d/0x4d0 [ 38.934055] rcu_core+0x8c8/0x2860 [ 38.934505] __do_softirq+0x1b7/0x7d4 [ 38.934983] [ 38.935208] Last potentially related work creation: [ 38.935782] kasan_save_stack+0x22/0x50 [ 38.936282] __kasan_record_aux_stack+0x8e/0xa0 [ 38.936854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.937577] remove_vma+0x139/0x170 [ 38.938031] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.938584] do_vmi_munmap+0x1f1/0x2b0 [ 38.939076] __vm_munmap+0x138/0x3a0 [ 38.939548] __x64_sys_munmap+0x59/0x80 [ 38.940045] do_syscall_64+0x3f/0x90 [ 38.940515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941156] [ 38.941370] The buggy address belongs to the object at ffff88800da5e910 [ 38.941370] which belongs to the cache vm_area_struct of size 168 [ 38.942826] The buggy address is located 88 bytes inside of [ 38.942826] freed 168-byte region [ffff88800da5e910, ffff88800da5e9b8) [ 38.944223] [ 38.944440] The buggy address belongs to the physical page: [ 38.945113] page:000000004c2a26ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda5e [ 38.946188] memcg:ffff888019e33801 [ 38.946615] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.947266] page_type: 0xffffffff() [ 38.947712] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.948646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e33801 [ 38.949552] page dumped because: kasan: bad access detected [ 38.950207] [ 38.950421] Memory state around the buggy address: [ 38.950991] ffff88800da5e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.951854] ffff88800da5e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.952708] >ffff88800da5e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953555] ^ [ 38.954328] ffff88800da5e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.955195] ffff88800da5ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956039] ================================================================== [ 38.957137] Disabling lock debugging due to kernel taint [ 41.460100] BUG: Bad rss-counter state mm:00000000bbf651cc type:MM_FILEPAGES val:33 [ 41.461272] BUG: Bad rss-counter state mm:00000000bbf651cc type:MM_ANONPAGES val:22 [ 41.902151] BUG: Bad rss-counter state mm:000000009abb1f88 type:MM_FILEPAGES val:33 [ 41.903157] BUG: Bad rss-counter state mm:000000009abb1f88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52255' (ECDSA) to the list of known hosts. 2023/06/20 17:46:48 fuzzer started 2023/06/20 17:46:48 dialing manager at localhost:36067 2023/06/20 17:46:48 checking machine... 2023/06/20 17:46:48 checking revisions... [ 42.581393] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:48 testing simple program... [ 42.624611] cgroup: Unknown subsys name 'net' [ 42.662768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110030d6e9e RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880186b74e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000c0800000c08 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f18 RFL=00000246 [---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 00007fc62ebca900 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=00007ffec9018000 CR3=000000000f20a000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f3 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800a3281a0 RSP=ffff88800a2177a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f3 R11=0000000000000128 R12=00000000000101f3 R13=ffff88800a328050 R14=ffff88800a328048 R15=ffff88800a328060 RIP=ffffffff82191d9e RFL=00000093 [--S-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 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=00007ff522b1ec20 CR3=000000000d5ca000 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=cda766bf8b78beb8d34dabeca04d2eae XMM02=ec2efd57dc4c00df000000000011c410 XMM03=fe482b6e36d70816000000000011c4e0 XMM04=11eaf2a2daf438a000000000000ae988 XMM05=0d1d546539cb999800000000001329c0 XMM06=13e856d8d71426c80000000000132130 XMM07=e042d86d42eb936e0000000000122908 XMM08=fe482b6e36d70816000000000011c4e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000