syzkaller login: [ 30.509182] BUG: Bad rss-counter state mm:00000000ac4625a3 type:MM_FILEPAGES val:33 [ 30.510944] BUG: Bad rss-counter state mm:00000000ac4625a3 type:MM_ANONPAGES val:22 [ 30.678566] ================================================================== [ 30.679515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.680472] Read of size 8 at addr ffff888015899c20 by task sshd/219 [ 30.681490] [ 30.681762] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.682770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.683947] Call Trace: [ 30.684315] [ 30.684600] dump_stack_lvl+0x91/0xf0 [ 30.685095] print_report+0xcc/0x620 [ 30.685575] ? __virt_addr_valid+0x102/0x340 [ 30.686124] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687354] kasan_report+0xbe/0xf0 [ 30.687826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.688463] vma_interval_tree_remove+0xc75/0xec0 [ 30.689070] vma_prepare+0xc54/0x11a0 [ 30.689561] __split_vma+0x5af/0x950 [ 30.690029] ? __pfx___split_vma+0x10/0x10 [ 30.690555] ? find_held_lock+0x2c/0x110 [ 30.691071] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.691628] ? lock_is_held_type+0x9f/0x120 [ 30.692182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.692808] ? mtree_range_walk+0x632/0x900 [ 30.693372] ? mas_walk+0x5c7/0x7c0 [ 30.693843] do_vmi_munmap+0x1f1/0x2b0 [ 30.694332] mmap_region+0x1f9/0x2660 [ 30.694819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.695344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.696055] ? __pfx_lock_acquire+0x10/0x10 [ 30.696613] ? __pfx_mmap_region+0x10/0x10 [ 30.697138] ? security_mmap_addr+0x7d/0xa0 [ 30.697670] ? get_unmapped_area+0x1f5/0x3f0 [ 30.698222] do_mmap+0x854/0xf00 [ 30.698655] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.699715] ksys_mmap_pgoff+0x3af/0x500 [ 30.700230] do_syscall_64+0x3f/0x90 [ 30.700718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701361] RIP: 0033:0x7efce5f3cd82 [ 30.701817] 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 [ 30.703909] RSP: 002b:00007ffca5fc42d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.704825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efce5f3cd82 [ 30.705669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efce5376000 [ 30.706512] RBP: 00007efce5376000 R08: 0000000000000009 R09: 0000000000001000 [ 30.707347] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffd21d9ec0 [ 30.708191] R13: 00007ffca5fc42f0 R14: 00007ffca5fc4320 R15: 00007ffca5fc4680 [ 30.709030] [ 30.709318] [ 30.709530] Allocated by task 212: [ 30.709953] kasan_save_stack+0x22/0x50 [ 30.710453] kasan_set_track+0x25/0x30 [ 30.710950] __kasan_slab_alloc+0x59/0x70 [ 30.711467] kmem_cache_alloc+0x16b/0x370 [ 30.711974] vm_area_dup+0x20/0x160 [ 30.712438] __split_vma+0x170/0x950 [ 30.712897] split_vma+0xc6/0x110 [ 30.713330] mprotect_fixup+0x8d2/0xb30 [ 30.713826] do_mprotect_pkey+0x87e/0xd40 [ 30.714340] __x64_sys_mprotect+0x78/0xc0 [ 30.714851] do_syscall_64+0x3f/0x90 [ 30.715323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.715952] [ 30.716170] Freed by task 212: [ 30.716564] kasan_save_stack+0x22/0x50 [ 30.717064] kasan_set_track+0x25/0x30 [ 30.717551] kasan_save_free_info+0x2b/0x50 [ 30.718078] __kasan_slab_free+0x10a/0x190 [ 30.718604] kmem_cache_free+0x10d/0x4d0 [ 30.719105] rcu_core+0x8c8/0x2860 [ 30.719542] __do_softirq+0x1b7/0x7d4 [ 30.720015] [ 30.720239] Last potentially related work creation: [ 30.720812] kasan_save_stack+0x22/0x50 [ 30.721314] __kasan_record_aux_stack+0x8e/0xa0 [ 30.721877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.722507] remove_vma+0x139/0x170 [ 30.722956] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.723512] do_vmi_munmap+0x1f1/0x2b0 [ 30.723991] __vm_munmap+0x138/0x3a0 [ 30.724474] __x64_sys_munmap+0x59/0x80 [ 30.724959] do_syscall_64+0x3f/0x90 [ 30.725427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.726059] [ 30.726272] The buggy address belongs to the object at ffff888015899bc8 [ 30.726272] which belongs to the cache vm_area_struct of size 168 [ 30.727727] The buggy address is located 88 bytes inside of [ 30.727727] freed 168-byte region [ffff888015899bc8, ffff888015899c70) [ 30.729127] [ 30.729339] The buggy address belongs to the physical page: [ 30.729992] page:00000000d6ee211d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15899 [ 30.731078] memcg:ffff888016ce3201 [ 30.731501] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.732142] page_type: 0xffffffff() [ 30.732619] raw: 0100000000000200 ffff8880087a0c80 ffffea00003faf00 dead000000000004 [ 30.733543] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ce3201 [ 30.734436] page dumped because: kasan: bad access detected [ 30.735091] [ 30.735304] Memory state around the buggy address: [ 30.735877] ffff888015899b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.736735] ffff888015899b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.737594] >ffff888015899c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.738436] ^ [ 30.738979] ffff888015899c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.739845] ffff888015899d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.740713] ================================================================== [ 30.741706] Disabling lock debugging due to kernel taint [ 32.536677] BUG: Bad rss-counter state mm:0000000048490c69 type:MM_FILEPAGES val:33 [ 32.537400] BUG: Bad rss-counter state mm:0000000048490c69 type:MM_ANONPAGES val:22 [ 32.927745] BUG: Bad rss-counter state mm:00000000a5cd0151 type:MM_FILEPAGES val:33 [ 32.928863] BUG: Bad rss-counter state mm:00000000a5cd0151 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58854' (ECDSA) to the list of known hosts. 2023/06/20 11:16:02 fuzzer started 2023/06/20 11:16:02 dialing manager at localhost:36067 2023/06/20 11:16:02 checking machine... 2023/06/20 11:16:02 checking revisions... [ 33.655561] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:16:02 testing simple program... [ 33.712891] cgroup: Unknown subsys name 'net' [ 33.770963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff888019f8fb20 RDX=1ffff110033f1f5b RSI=ffff888019f8fb18 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff888019f8fa30 R8 =0000000000000001 R9 =ffff888019f8fac0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff8880142d8000 R15=ffff8880169d35f0 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f67de991900 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=00007fff0aa21000 CR3=0000000016660000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fe1b941ba30 CR3=000000000e34e000 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=2031303a36313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000