syzkaller login: [ 35.824505] BUG: Bad rss-counter state mm:000000003a7d86e8 type:MM_FILEPAGES val:33 [ 35.825760] BUG: Bad rss-counter state mm:000000003a7d86e8 type:MM_ANONPAGES val:22 [ 35.878114] ================================================================== [ 35.879300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.880543] Read of size 8 at addr ffff88800c65ced8 by task sshd/218 [ 35.881602] [ 35.881888] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.883039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.884330] Call Trace: [ 35.884771] [ 35.885144] dump_stack_lvl+0x91/0xf0 [ 35.885790] print_report+0xcc/0x620 [ 35.886411] ? __virt_addr_valid+0x102/0x340 [ 35.887108] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.887911] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.888751] kasan_report+0xbe/0xf0 [ 35.889386] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.890219] vma_interval_tree_remove+0xc75/0xec0 [ 35.891019] vma_prepare+0xc54/0x11a0 [ 35.891649] __split_vma+0x5af/0x950 [ 35.892282] ? __pfx___split_vma+0x10/0x10 [ 35.893010] ? find_held_lock+0x2c/0x110 [ 35.893709] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.894458] ? lock_is_held_type+0x9f/0x120 [ 35.895177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.895994] ? mtree_range_walk+0x632/0x900 [ 35.896748] ? mas_walk+0x5c7/0x7c0 [ 35.897388] do_vmi_munmap+0x1f1/0x2b0 [ 35.898046] mmap_region+0x1f9/0x2660 [ 35.898691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.899375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.900331] ? __pfx_lock_acquire+0x10/0x10 [ 35.901081] ? __pfx_mmap_region+0x10/0x10 [ 35.901788] ? security_mmap_addr+0x7d/0xa0 [ 35.902497] ? get_unmapped_area+0x1f5/0x3f0 [ 35.903226] do_mmap+0x854/0xf00 [ 35.903816] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.904484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.905247] ksys_mmap_pgoff+0x3af/0x500 [ 35.905931] do_syscall_64+0x3f/0x90 [ 35.906569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.907442] RIP: 0033:0x7f84c694ad82 [ 35.908053] 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 [ 35.910850] RSP: 002b:00007ffe174f9278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.911989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84c694ad82 [ 35.913096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84c5d84000 [ 35.914133] RBP: 00007f84c5d84000 R08: 0000000000000009 R09: 0000000000001000 [ 35.915174] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609863f0ec0 [ 35.916228] R13: 00007ffe174f9290 R14: 00007ffe174f92c0 R15: 00007ffe174f9620 [ 35.917292] [ 35.917652] [ 35.917916] Allocated by task 211: [ 35.918451] kasan_save_stack+0x22/0x50 [ 35.919080] kasan_set_track+0x25/0x30 [ 35.919693] __kasan_slab_alloc+0x59/0x70 [ 35.920337] kmem_cache_alloc+0x16b/0x370 [ 35.921007] vm_area_dup+0x20/0x160 [ 35.921579] __split_vma+0x170/0x950 [ 35.922159] split_vma+0xc6/0x110 [ 35.922710] mprotect_fixup+0x8d2/0xb30 [ 35.923331] do_mprotect_pkey+0x87e/0xd40 [ 35.923976] __x64_sys_mprotect+0x78/0xc0 [ 35.924616] do_syscall_64+0x3f/0x90 [ 35.925239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.925940] [ 35.926154] Freed by task 211: [ 35.926553] kasan_save_stack+0x22/0x50 [ 35.927056] kasan_set_track+0x25/0x30 [ 35.927550] kasan_save_free_info+0x2b/0x50 [ 35.928092] __kasan_slab_free+0x10a/0x190 [ 35.928633] kmem_cache_free+0x10d/0x4d0 [ 35.929164] rcu_core+0x8c8/0x2860 [ 35.929614] __do_softirq+0x1b7/0x7d4 [ 35.930099] [ 35.930313] Last potentially related work creation: [ 35.930903] kasan_save_stack+0x22/0x50 [ 35.931406] __kasan_record_aux_stack+0x8e/0xa0 [ 35.931994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.932680] remove_vma+0x139/0x170 [ 35.933157] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.933739] do_vmi_munmap+0x1f1/0x2b0 [ 35.934244] __vm_munmap+0x138/0x3a0 [ 35.934723] __x64_sys_munmap+0x59/0x80 [ 35.935217] do_syscall_64+0x3f/0x90 [ 35.935700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.936358] [ 35.936581] Second to last potentially related work creation: [ 35.937285] kasan_save_stack+0x22/0x50 [ 35.937803] __kasan_record_aux_stack+0x8e/0xa0 [ 35.938396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.939053] remove_vma+0x139/0x170 [ 35.939505] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.940073] do_vmi_munmap+0x1f1/0x2b0 [ 35.940564] mmap_region+0x1f9/0x2660 [ 35.941247] do_mmap+0x854/0xf00 [ 35.941784] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.942369] ksys_mmap_pgoff+0x3af/0x500 [ 35.942965] do_syscall_64+0x3f/0x90 [ 35.943532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944308] [ 35.944572] The buggy address belongs to the object at ffff88800c65ce80 [ 35.944572] which belongs to the cache vm_area_struct of size 168 [ 35.946344] The buggy address is located 88 bytes inside of [ 35.946344] freed 168-byte region [ffff88800c65ce80, ffff88800c65cf28) [ 35.947998] [ 35.948257] The buggy address belongs to the physical page: [ 35.949048] page:00000000da003ca3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc65c [ 35.950333] memcg:ffff88800c65e201 [ 35.950844] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.951604] page_type: 0xffffffff() [ 35.952150] raw: 0100000000000200 ffff8880087a0c80 ffffea0000324840 dead000000000006 [ 35.953288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c65e201 [ 35.954414] page dumped because: kasan: bad access detected [ 35.955246] [ 35.955506] Memory state around the buggy address: [ 35.956221] ffff88800c65cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.957273] ffff88800c65ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.958213] >ffff88800c65ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.959058] ^ [ 35.959783] ffff88800c65cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.960634] ffff88800c65cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.961504] ================================================================== [ 35.963047] Disabling lock debugging due to kernel taint [ 37.909726] BUG: Bad rss-counter state mm:00000000f035c391 type:MM_FILEPAGES val:33 [ 37.910922] BUG: Bad rss-counter state mm:00000000f035c391 type:MM_ANONPAGES val:22 [ 38.360467] BUG: Bad rss-counter state mm:00000000fa1a68d8 type:MM_FILEPAGES val:33 [ 38.361466] BUG: Bad rss-counter state mm:00000000fa1a68d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57565' (ECDSA) to the list of known hosts. 2023/06/20 21:14:52 fuzzer started 2023/06/20 21:14:52 dialing manager at localhost:36067 2023/06/20 21:14:52 checking machine... 2023/06/20 21:14:52 checking revisions... [ 39.091373] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:14:52 testing simple program... [ 39.141833] cgroup: Unknown subsys name 'net' [ 39.201625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83632182 RDX=0000000000026321 RSI=0000000000026321 RDI=ffffffff86582674 RBP=ffff888019d0fa98 RSP=ffff888019d0f9d0 R8 =0000000000000000 R9 =ffff888019d0fa80 R10=0000000000038001 R11=00000000000229e6 R12=ffff888019d0faa0 R13=ffff888019d0fa88 R14=ffff888019d0fa81 R15=ffff888019d0fa40 RIP=ffffffff8113077a 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 00007fd0aa2d4900 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=00007ffea46b2000 CR3=0000000018760000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fbe9d953960 CR3=000000000d966000 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=2031353a34313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a34313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000