syzkaller login: [ 38.770707] BUG: Bad rss-counter state mm:0000000021f64284 type:MM_FILEPAGES val:33 [ 38.772200] BUG: Bad rss-counter state mm:0000000021f64284 type:MM_ANONPAGES val:22 [ 38.915939] ================================================================== [ 38.916878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.917820] Read of size 8 at addr ffff88800dfecd08 by task sshd/219 [ 38.918586] [ 38.918861] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.919741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.920759] Call Trace: [ 38.921105] [ 38.921391] dump_stack_lvl+0x91/0xf0 [ 38.921895] print_report+0xcc/0x620 [ 38.922377] ? __virt_addr_valid+0x102/0x340 [ 38.922948] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924204] kasan_report+0xbe/0xf0 [ 38.924705] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925330] vma_interval_tree_remove+0xc75/0xec0 [ 38.925943] vma_prepare+0xc54/0x11a0 [ 38.926424] __split_vma+0x5af/0x950 [ 38.926896] ? __pfx___split_vma+0x10/0x10 [ 38.927419] ? find_held_lock+0x2c/0x110 [ 38.927937] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.928539] ? lock_is_held_type+0x9f/0x120 [ 38.929081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.929693] ? mtree_range_walk+0x632/0x900 [ 38.930252] ? mas_walk+0x5c7/0x7c0 [ 38.930723] do_vmi_munmap+0x1f1/0x2b0 [ 38.931218] mmap_region+0x1f9/0x2660 [ 38.931719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.932968] ? __pfx_lock_acquire+0x10/0x10 [ 38.933504] ? __pfx_mmap_region+0x10/0x10 [ 38.934027] ? security_mmap_addr+0x7d/0xa0 [ 38.934556] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935100] do_mmap+0x854/0xf00 [ 38.935540] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.936598] ksys_mmap_pgoff+0x3af/0x500 [ 38.937107] do_syscall_64+0x3f/0x90 [ 38.937583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938224] RIP: 0033:0x7fd60bb4cd82 [ 38.938700] 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 [ 38.940829] RSP: 002b:00007ffeac7e8248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.941731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd60bb4cd82 [ 38.942576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd60af86000 [ 38.943414] RBP: 00007fd60af86000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944263] R10: 0000000000000812 R11: 0000000000000206 R12: 000055953509cec0 [ 38.945120] R13: 00007ffeac7e8260 R14: 00007ffeac7e8290 R15: 00007ffeac7e85f0 [ 38.945975] [ 38.946269] [ 38.946481] Allocated by task 212: [ 38.946908] kasan_save_stack+0x22/0x50 [ 38.947407] kasan_set_track+0x25/0x30 [ 38.947899] __kasan_slab_alloc+0x59/0x70 [ 38.948428] kmem_cache_alloc+0x16b/0x370 [ 38.948956] vm_area_dup+0x20/0x160 [ 38.949415] __split_vma+0x170/0x950 [ 38.949874] split_vma+0xc6/0x110 [ 38.950317] mprotect_fixup+0x8d2/0xb30 [ 38.950818] do_mprotect_pkey+0x87e/0xd40 [ 38.951348] __x64_sys_mprotect+0x78/0xc0 [ 38.951872] do_syscall_64+0x3f/0x90 [ 38.952365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953011] [ 38.953225] Freed by task 212: [ 38.953659] kasan_save_stack+0x22/0x50 [ 38.954156] kasan_set_track+0x25/0x30 [ 38.954667] kasan_save_free_info+0x2b/0x50 [ 38.955210] __kasan_slab_free+0x10a/0x190 [ 38.955748] kmem_cache_free+0x10d/0x4d0 [ 38.956254] rcu_core+0x8c8/0x2860 [ 38.956705] __do_softirq+0x1b7/0x7d4 [ 38.957182] [ 38.957398] Last potentially related work creation: [ 38.957985] kasan_save_stack+0x22/0x50 [ 38.958481] __kasan_record_aux_stack+0x8e/0xa0 [ 38.959055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.959698] remove_vma+0x139/0x170 [ 38.960148] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960734] do_vmi_munmap+0x1f1/0x2b0 [ 38.961213] __vm_munmap+0x138/0x3a0 [ 38.961683] __x64_sys_munmap+0x59/0x80 [ 38.962178] do_syscall_64+0x3f/0x90 [ 38.962654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963299] [ 38.963512] Second to last potentially related work creation: [ 38.964186] kasan_save_stack+0x22/0x50 [ 38.964692] __kasan_record_aux_stack+0x8e/0xa0 [ 38.965271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.965907] remove_vma+0x139/0x170 [ 38.966356] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966911] do_vmi_munmap+0x1f1/0x2b0 [ 38.967396] mmap_region+0x1f9/0x2660 [ 38.967872] do_mmap+0x854/0xf00 [ 38.968308] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.968820] ksys_mmap_pgoff+0x7d/0x500 [ 38.969309] do_syscall_64+0x3f/0x90 [ 38.969781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970609] [ 38.970898] The buggy address belongs to the object at ffff88800dfeccb0 [ 38.970898] which belongs to the cache vm_area_struct of size 168 [ 38.972846] The buggy address is located 88 bytes inside of [ 38.972846] freed 168-byte region [ffff88800dfeccb0, ffff88800dfecd58) [ 38.974657] [ 38.974927] The buggy address belongs to the physical page: [ 38.975766] page:00000000acb6e986 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfec [ 38.977177] memcg:ffff88800ef49901 [ 38.977732] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.978560] page_type: 0xffffffff() [ 38.979135] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.980325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef49901 [ 38.981507] page dumped because: kasan: bad access detected [ 38.982368] [ 38.982639] Memory state around the buggy address: [ 38.983369] ffff88800dfecc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.984489] ffff88800dfecc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.985605] >ffff88800dfecd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.986687] ^ [ 38.987245] ffff88800dfecd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.988373] ffff88800dfece00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.989446] ================================================================== [ 38.991322] Disabling lock debugging due to kernel taint [ 40.645447] BUG: Bad rss-counter state mm:000000003ad787f0 type:MM_FILEPAGES val:33 [ 40.646605] BUG: Bad rss-counter state mm:000000003ad787f0 type:MM_ANONPAGES val:22 [ 41.028253] BUG: Bad rss-counter state mm:00000000f26b50c6 type:MM_FILEPAGES val:33 [ 41.029301] BUG: Bad rss-counter state mm:00000000f26b50c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45995' (ECDSA) to the list of known hosts. 2023/06/20 14:31:48 fuzzer started 2023/06/20 14:31:49 dialing manager at localhost:36067 2023/06/20 14:31:49 checking machine... 2023/06/20 14:31:49 checking revisions... [ 41.736944] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:31:49 testing simple program... [ 41.780837] cgroup: Unknown subsys name 'net' [ 41.821807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:31:48 Registers: info registers vcpu 0 RAX=ffff88800d94cd00 RBX=ffff888017f151c0 RCX=0000000000000000 RDX=ffff888017f151c0 RSI=ffffffff810ad5a4 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f19fee8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c7800000c78 R12=ffff888017f16840 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ad5b5 RFL=00000002 [-------] 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 00007f0b5e08a900 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=00007f0b5e641618 CR3=000000000f444000 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=2038343a31333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a31333a3431203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007fd2f2e29000 CR3=000000000d84e000 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=61be6bab70a0859f1a4725609b56413c XMM02=ec2efd57dc4c00df000000000011afc8 XMM03=3db5b6cd8ee72662000000000011b098 XMM04=10a5aa46c1e1831200000000000ae988 XMM05=dfcdbad4f1609c370000000000132848 XMM06=01a3b041055422590000000000131a20 XMM07=e042d86d42eb936e0000000000121cb0 XMM08=3db5b6cd8ee72662000000000011b098 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000