syzkaller login: [ 28.670705] BUG: Bad rss-counter state mm:000000006ad7f6c2 type:MM_FILEPAGES val:33 [ 28.671878] BUG: Bad rss-counter state mm:000000006ad7f6c2 type:MM_ANONPAGES val:22 [ 28.836309] ================================================================== [ 28.837215] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.838153] Read of size 8 at addr ffff88800dd2e968 by task sshd/219 [ 28.838923] [ 28.839144] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.840118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.841095] Call Trace: [ 28.841416] [ 28.841706] dump_stack_lvl+0x91/0xf0 [ 28.842201] print_report+0xcc/0x620 [ 28.842687] ? __virt_addr_valid+0x102/0x340 [ 28.843241] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.843861] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.844489] kasan_report+0xbe/0xf0 [ 28.844968] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.845590] vma_interval_tree_remove+0xc75/0xec0 [ 28.846205] vma_prepare+0xc54/0x11a0 [ 28.846706] __split_vma+0x5af/0x950 [ 28.847193] ? __pfx___split_vma+0x10/0x10 [ 28.847730] ? find_held_lock+0x2c/0x110 [ 28.848293] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.848882] ? lock_is_held_type+0x9f/0x120 [ 28.849425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.850048] ? mtree_range_walk+0x632/0x900 [ 28.850640] ? mas_walk+0x5c7/0x7c0 [ 28.851130] do_vmi_munmap+0x1f1/0x2b0 [ 28.851622] mmap_region+0x1f9/0x2660 [ 28.852123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.852648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.853373] ? __pfx_lock_acquire+0x10/0x10 [ 28.853912] ? __pfx_mmap_region+0x10/0x10 [ 28.854457] ? security_mmap_addr+0x7d/0xa0 [ 28.854994] ? get_unmapped_area+0x1f5/0x3f0 [ 28.855556] do_mmap+0x854/0xf00 [ 28.856001] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.856518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.857086] ksys_mmap_pgoff+0x3af/0x500 [ 28.857606] do_syscall_64+0x3f/0x90 [ 28.858092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.858749] RIP: 0033:0x7f0c9c311d82 [ 28.859206] 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 [ 28.861379] RSP: 002b:00007ffdf2b5d778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.862303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c9c311d82 [ 28.863166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c9b74b000 [ 28.864033] RBP: 00007f0c9b74b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.864957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ba9b71ec0 [ 28.865819] R13: 00007ffdf2b5d790 R14: 00007ffdf2b5d7c0 R15: 00007ffdf2b5db20 [ 28.866693] [ 28.866997] [ 28.867216] Allocated by task 211: [ 28.867648] kasan_save_stack+0x22/0x50 [ 28.868161] kasan_set_track+0x25/0x30 [ 28.868654] __kasan_slab_alloc+0x59/0x70 [ 28.869190] kmem_cache_alloc+0x16b/0x370 [ 28.869722] vm_area_dup+0x20/0x160 [ 28.870173] __split_vma+0x170/0x950 [ 28.870638] split_vma+0xc6/0x110 [ 28.871078] mprotect_fixup+0x8d2/0xb30 [ 28.871586] do_mprotect_pkey+0x87e/0xd40 [ 28.872117] __x64_sys_mprotect+0x78/0xc0 [ 28.872641] do_syscall_64+0x3f/0x90 [ 28.873116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.873756] [ 28.873974] Freed by task 211: [ 28.874367] kasan_save_stack+0x22/0x50 [ 28.874874] kasan_set_track+0x25/0x30 [ 28.875372] kasan_save_free_info+0x2b/0x50 [ 28.875900] __kasan_slab_free+0x10a/0x190 [ 28.876458] kmem_cache_free+0x10d/0x4d0 [ 28.876963] rcu_core+0x8c8/0x2860 [ 28.877405] __do_softirq+0x1b7/0x7d4 [ 28.877878] [ 28.878091] Last potentially related work creation: [ 28.878680] kasan_save_stack+0x22/0x50 [ 28.879181] __kasan_record_aux_stack+0x8e/0xa0 [ 28.879747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.880409] remove_vma+0x139/0x170 [ 28.880860] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.881415] do_vmi_munmap+0x1f1/0x2b0 [ 28.881900] __vm_munmap+0x138/0x3a0 [ 28.882380] __x64_sys_munmap+0x59/0x80 [ 28.882881] do_syscall_64+0x3f/0x90 [ 28.883356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884010] [ 28.884230] Second to last potentially related work creation: [ 28.884914] kasan_save_stack+0x22/0x50 [ 28.885415] __kasan_record_aux_stack+0x8e/0xa0 [ 28.885991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.886629] remove_vma+0x139/0x170 [ 28.887080] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.887638] do_vmi_munmap+0x1f1/0x2b0 [ 28.888151] mmap_region+0x1f9/0x2660 [ 28.888635] do_mmap+0x854/0xf00 [ 28.889069] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.889560] ksys_mmap_pgoff+0x3af/0x500 [ 28.890062] do_syscall_64+0x3f/0x90 [ 28.890533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.891177] [ 28.891397] The buggy address belongs to the object at ffff88800dd2e910 [ 28.891397] which belongs to the cache vm_area_struct of size 168 [ 28.892898] The buggy address is located 88 bytes inside of [ 28.892898] freed 168-byte region [ffff88800dd2e910, ffff88800dd2e9b8) [ 28.894349] [ 28.894566] The buggy address belongs to the physical page: [ 28.895227] page:000000000dd11d33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd2e [ 28.896340] memcg:ffff88800cd88801 [ 28.896769] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.897413] page_type: 0xffffffff() [ 28.897864] raw: 0100000000000200 ffff8880087a0c80 ffffea00003750c0 dead000000000008 [ 28.898792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd88801 [ 28.899701] page dumped because: kasan: bad access detected [ 28.900381] [ 28.900593] Memory state around the buggy address: [ 28.901170] ffff88800dd2e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.902015] ffff88800dd2e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.902862] >ffff88800dd2e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.903716] ^ [ 28.904512] ffff88800dd2e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.905373] ffff88800dd2ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.906227] ================================================================== [ 28.907462] Disabling lock debugging due to kernel taint [ 31.264203] BUG: Bad rss-counter state mm:0000000049e1d007 type:MM_FILEPAGES val:33 [ 31.265643] BUG: Bad rss-counter state mm:0000000049e1d007 type:MM_ANONPAGES val:22 [ 31.745420] BUG: Bad rss-counter state mm:00000000772c9110 type:MM_FILEPAGES val:33 [ 31.746394] BUG: Bad rss-counter state mm:00000000772c9110 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9239' (ECDSA) to the list of known hosts. 2023/06/20 23:39:03 fuzzer started 2023/06/20 23:39:04 dialing manager at localhost:36067 2023/06/20 23:39:04 checking machine... 2023/06/20 23:39:04 checking revisions... [ 32.472817] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:39:04 testing simple program... [ 32.517640] cgroup: Unknown subsys name 'net' [ 32.583007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:39:03 Registers: info registers vcpu 0 RAX=ffffffff860d258b RBX=0000000000000001 RCX=ffffffff860d2586 RDX=0000000000000000 RSI=1ffffffff0c1a4b1 RDI=ffffffff85db99f4 RBP=ffff8880146ef508 RSP=ffff8880146ef440 R8 =ffffffff860d2550 R9 =ffff8880146ef4f0 R10=0000000000038001 R11=000000000000fc0c R12=ffff8880146ef510 R13=ffff8880146ef4f8 R14=ffff8880146ef4f1 R15=ffff8880146ef4b0 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 00007f7e2ba5f900 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=00007f7e2ae7f790 CR3=0000000013a1e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cfd3b65304248f8500000000000ae988 XMM05=986b3895393fab250000000000134068 XMM06=806171799158d9670000000000133108 XMM07=fb795ef6d65770560000000000121950 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800d63c000 RCX=1ffffffff09a6df4 RDX=ffffffff87f965e0 RSI=ffffffff84d36760 RDI=ffffffff84d36fa0 RBP=0000000000000010 RSP=ffff888015927d10 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800d63c010 R13=0000000000000000 R14=ffffffff87f97640 R15=0000000000000001 RIP=ffffffff83648e2b 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 00007f4a6bf35900 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=00007f4a6c4ed0b0 CR3=000000000e97a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000