syzkaller login: [ 31.017392] BUG: Bad rss-counter state mm:000000009e9ea9be type:MM_FILEPAGES val:33 [ 31.018708] BUG: Bad rss-counter state mm:000000009e9ea9be type:MM_ANONPAGES val:22 [ 31.150464] ================================================================== [ 31.151566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.152809] Read of size 8 at addr ffff88800e5fe798 by task sshd/221 [ 31.153747] [ 31.154009] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.155030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.156201] Call Trace: [ 31.156618] <TASK> [ 31.156874] dump_stack_lvl+0x91/0xf0 [ 31.157163] print_report+0xcc/0x620 [ 31.157434] ? __virt_addr_valid+0x102/0x340 [ 31.157742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158121] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158495] kasan_report+0xbe/0xf0 [ 31.158787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159164] vma_interval_tree_remove+0xc75/0xec0 [ 31.159531] vma_prepare+0xc54/0x11a0 [ 31.159823] __split_vma+0x5af/0x950 [ 31.160117] ? __pfx___split_vma+0x10/0x10 [ 31.160450] ? find_held_lock+0x2c/0x110 [ 31.160757] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.161091] ? lock_is_held_type+0x9f/0x120 [ 31.161428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.161794] ? mtree_range_walk+0x632/0x900 [ 31.162135] ? mas_walk+0x5c7/0x7c0 [ 31.162419] do_vmi_munmap+0x1f1/0x2b0 [ 31.162718] mmap_region+0x1f9/0x2660 [ 31.163011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.163325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.163757] ? __pfx_lock_acquire+0x10/0x10 [ 31.164077] ? __pfx_mmap_region+0x10/0x10 [ 31.164411] ? security_mmap_addr+0x7d/0xa0 [ 31.164733] ? get_unmapped_area+0x1f5/0x3f0 [ 31.165063] do_mmap+0x854/0xf00 [ 31.165337] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.165633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.165968] ksys_mmap_pgoff+0x3af/0x500 [ 31.166275] do_syscall_64+0x3f/0x90 [ 31.166567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.166958] RIP: 0033:0x7fa09480fd82 [ 31.167237] 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 [ 31.168611] RSP: 002b:00007ffc1520f618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.169280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa09480fd82 [ 31.169893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa093c49000 [ 31.170439] RBP: 00007fa093c49000 R08: 0000000000000009 R09: 0000000000001000 [ 31.170957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558024f96ec0 [ 31.171497] R13: 00007ffc1520f630 R14: 00007ffc1520f660 R15: 00007ffc1520f9c0 [ 31.172019] </TASK> [ 31.172206] [ 31.172343] Allocated by task 214: [ 31.172606] kasan_save_stack+0x22/0x50 [ 31.172912] kasan_set_track+0x25/0x30 [ 31.173232] __kasan_slab_alloc+0x59/0x70 [ 31.173549] kmem_cache_alloc+0x16b/0x370 [ 31.173860] vm_area_dup+0x20/0x160 [ 31.174139] __split_vma+0x170/0x950 [ 31.174417] split_vma+0xc6/0x110 [ 31.174676] mprotect_fixup+0x8d2/0xb30 [ 31.174973] do_mprotect_pkey+0x87e/0xd40 [ 31.175288] __x64_sys_mprotect+0x78/0xc0 [ 31.175603] do_syscall_64+0x3f/0x90 [ 31.175886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176274] [ 31.176394] Freed by task 214: [ 31.176616] kasan_save_stack+0x22/0x50 [ 31.176902] kasan_set_track+0x25/0x30 [ 31.177184] kasan_save_free_info+0x2b/0x50 [ 31.177487] __kasan_slab_free+0x10a/0x190 [ 31.177778] kmem_cache_free+0x10d/0x4d0 [ 31.178066] rcu_core+0x8c8/0x2860 [ 31.178324] __do_softirq+0x1b7/0x7d4 [ 31.178594] [ 31.178711] Last potentially related work creation: [ 31.179042] kasan_save_stack+0x22/0x50 [ 31.179328] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.180000] remove_vma+0x139/0x170 [ 31.180270] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.180590] do_vmi_munmap+0x1f1/0x2b0 [ 31.180868] __vm_munmap+0x138/0x3a0 [ 31.181136] __x64_sys_munmap+0x59/0x80 [ 31.181410] do_syscall_64+0x3f/0x90 [ 31.181675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182033] [ 31.182160] The buggy address belongs to the object at ffff88800e5fe740 [ 31.182160] which belongs to the cache vm_area_struct of size 168 [ 31.182962] The buggy address is located 88 bytes inside of [ 31.182962] freed 168-byte region [ffff88800e5fe740, ffff88800e5fe7e8) [ 31.183736] [ 31.183853] The buggy address belongs to the physical page: [ 31.184222] page:0000000094a42837 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5fe [ 31.184838] memcg:ffff88800cc0c901 [ 31.185073] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.185449] page_type: 0xffffffff() [ 31.185706] raw: 0100000000000200 ffff8880087a0c80 ffffea000037af40 dead000000000004 [ 31.186217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc0c901 [ 31.186717] page dumped because: kasan: bad access detected [ 31.187085] [ 31.187210] Memory state around the buggy address: [ 31.187534] ffff88800e5fe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.188012] ffff88800e5fe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.188500] >ffff88800e5fe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.188985] ^ [ 31.189273] ffff88800e5fe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.189755] ffff88800e5fe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.190248] ================================================================== [ 31.190750] Disabling lock debugging due to kernel taint [ 33.261345] BUG: Bad rss-counter state mm:00000000d97e2deb type:MM_FILEPAGES val:33 [ 33.262347] BUG: Bad rss-counter state mm:00000000d97e2deb type:MM_ANONPAGES val:22 [ 33.733806] BUG: Bad rss-counter state mm:0000000059a7566a type:MM_FILEPAGES val:33 [ 33.735308] BUG: Bad rss-counter state mm:0000000059a7566a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57938' (ECDSA) to the list of known hosts. 2023/06/21 06:31:23 fuzzer started 2023/06/21 06:31:23 dialing manager at localhost:36067 2023/06/21 06:31:23 checking machine... 2023/06/21 06:31:23 checking revisions... [ 34.454500] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:31:23 testing simple program... [ 34.507429] cgroup: Unknown subsys name 'net' [ 34.563379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:23 Registers: info registers vcpu 0 RAX=fffffffffffffec8 RBX=0000000000000000 RCX=0000000200000001 RDX=00007fbce8000ba1 RSI=0000000000000070 RDI=0000001d00000001 RBP=000056032f8161c0 RSP=00007fbced7ac6f8 R8 =0000000000000064 R9 =0000000000000001 R10=0000000000000001 R11=00007fbced7ac8b0 R12=0000000000000064 R13=0000000000001fa0 R14=00007fbce8000ba0 R15=0000000000000001 RIP=00007fbcedb75ab7 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbced7b0700 00000000 00000000 GS =0000 0000000000000000 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=00007fe31ac46000 CR3=000000000e0f2000 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=00000000000199b7000000006492993b XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880183af8d0 RCX=ffffffff86138e01 RDX=1ffff11003075f29 RSI=ffffffff8180c705 RDI=ffff8880183af8dc RBP=ffff8880183af948 RSP=ffff8880183af7e8 R8 =ffffffff86138e90 R9 =ffff8880183af848 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880183af8d0 R13=0000000000000000 R14=ffff888010240000 R15=0000000080110000 RIP=ffffffff813ad549 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 00007fa6e27b4900 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=00007ffe69906000 CR3=0000000013e64000 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=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