syzkaller login: [ 39.133104] BUG: Bad rss-counter state mm:00000000b2132a93 type:MM_FILEPAGES val:33 [ 39.134308] BUG: Bad rss-counter state mm:00000000b2132a93 type:MM_ANONPAGES val:22 [ 39.176151] ================================================================== [ 39.177422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.178829] Read of size 8 at addr ffff88800e5d96b0 by task sshd/218 [ 39.179874] [ 39.180182] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.181341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.182421] Call Trace: [ 39.182815] [ 39.183216] dump_stack_lvl+0x91/0xf0 [ 39.183722] print_report+0xcc/0x620 [ 39.184215] ? __virt_addr_valid+0x102/0x340 [ 39.184780] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.185401] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.186019] kasan_report+0xbe/0xf0 [ 39.186535] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.187174] vma_interval_tree_remove+0xc75/0xec0 [ 39.187783] vma_prepare+0xc54/0x11a0 [ 39.188275] __split_vma+0x5af/0x950 [ 39.188761] ? __pfx___split_vma+0x10/0x10 [ 39.189305] ? find_held_lock+0x2c/0x110 [ 39.189839] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.190435] ? lock_is_held_type+0x9f/0x120 [ 39.190982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.191595] ? mtree_range_walk+0x632/0x900 [ 39.192159] ? mas_walk+0x5c7/0x7c0 [ 39.192651] do_vmi_munmap+0x1f1/0x2b0 [ 39.193160] mmap_region+0x1f9/0x2660 [ 39.193658] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.194186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.194938] ? __pfx_lock_acquire+0x10/0x10 [ 39.195473] ? __pfx_mmap_region+0x10/0x10 [ 39.196030] ? security_mmap_addr+0x7d/0xa0 [ 39.196569] ? get_unmapped_area+0x1f5/0x3f0 [ 39.197146] do_mmap+0x854/0xf00 [ 39.197595] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.198121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.198702] ksys_mmap_pgoff+0x3af/0x500 [ 39.199218] do_syscall_64+0x3f/0x90 [ 39.199713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.200382] RIP: 0033:0x7fd3f9971d82 [ 39.200853] 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 [ 39.202992] RSP: 002b:00007ffff5ef77e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.203911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3f9971d82 [ 39.204776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3f8dab000 [ 39.205639] RBP: 00007fd3f8dab000 R08: 0000000000000009 R09: 0000000000001000 [ 39.206524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d781be6f60 [ 39.207393] R13: 00007ffff5ef7800 R14: 00007ffff5ef7830 R15: 00007ffff5ef7b90 [ 39.208260] [ 39.208556] [ 39.208781] Allocated by task 211: [ 39.209224] kasan_save_stack+0x22/0x50 [ 39.209740] kasan_set_track+0x25/0x30 [ 39.210263] __kasan_slab_alloc+0x59/0x70 [ 39.210799] kmem_cache_alloc+0x16b/0x370 [ 39.211329] vm_area_dup+0x20/0x160 [ 39.211794] __split_vma+0x170/0x950 [ 39.212272] split_vma+0xc6/0x110 [ 39.212718] mprotect_fixup+0x8d2/0xb30 [ 39.213254] do_mprotect_pkey+0x87e/0xd40 [ 39.213779] __x64_sys_mprotect+0x78/0xc0 [ 39.214320] do_syscall_64+0x3f/0x90 [ 39.214809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.215461] [ 39.215684] Freed by task 211: [ 39.216083] kasan_save_stack+0x22/0x50 [ 39.216597] kasan_set_track+0x25/0x30 [ 39.217113] kasan_save_free_info+0x2b/0x50 [ 39.217651] __kasan_slab_free+0x10a/0x190 [ 39.218219] kmem_cache_free+0x10d/0x4d0 [ 39.218742] rcu_core+0x8c8/0x2860 [ 39.219193] __do_softirq+0x1b7/0x7d4 [ 39.219675] [ 39.219902] Last potentially related work creation: [ 39.220581] kasan_save_stack+0x22/0x50 [ 39.221103] __kasan_record_aux_stack+0x8e/0xa0 [ 39.221686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.222372] remove_vma+0x139/0x170 [ 39.222834] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.223407] do_vmi_munmap+0x1f1/0x2b0 [ 39.223909] __vm_munmap+0x138/0x3a0 [ 39.224388] __x64_sys_munmap+0x59/0x80 [ 39.224896] do_syscall_64+0x3f/0x90 [ 39.225377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.226032] [ 39.226278] Second to last potentially related work creation: [ 39.226969] kasan_save_stack+0x22/0x50 [ 39.227481] __kasan_record_aux_stack+0x8e/0xa0 [ 39.228068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.228720] remove_vma+0x139/0x170 [ 39.229184] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.229753] do_vmi_munmap+0x1f1/0x2b0 [ 39.230255] mmap_region+0x1f9/0x2660 [ 39.230743] do_mmap+0x854/0xf00 [ 39.231185] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.231690] ksys_mmap_pgoff+0x3af/0x500 [ 39.232203] do_syscall_64+0x3f/0x90 [ 39.232694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.233344] [ 39.233563] The buggy address belongs to the object at ffff88800e5d9658 [ 39.233563] which belongs to the cache vm_area_struct of size 168 [ 39.235060] The buggy address is located 88 bytes inside of [ 39.235060] freed 168-byte region [ffff88800e5d9658, ffff88800e5d9700) [ 39.236482] [ 39.236708] The buggy address belongs to the physical page: [ 39.237383] page:00000000d9952289 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5d9 [ 39.238491] memcg:ffff88800e16f601 [ 39.238930] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.239650] page_type: 0xffffffff() [ 39.240118] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.241044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e16f601 [ 39.241967] page dumped because: kasan: bad access detected [ 39.242678] [ 39.242905] Memory state around the buggy address: [ 39.243499] ffff88800e5d9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.244371] ffff88800e5d9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.245239] >ffff88800e5d9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.246128] ^ [ 39.246728] ffff88800e5d9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.247623] ffff88800e5d9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.248481] ================================================================== [ 39.249489] Disabling lock debugging due to kernel taint [ 41.480060] BUG: Bad rss-counter state mm:000000008d9185c3 type:MM_FILEPAGES val:33 [ 41.481043] BUG: Bad rss-counter state mm:000000008d9185c3 type:MM_ANONPAGES val:22 [ 41.931080] BUG: Bad rss-counter state mm:00000000b5688eee type:MM_FILEPAGES val:33 [ 41.932066] BUG: Bad rss-counter state mm:00000000b5688eee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27763' (ECDSA) to the list of known hosts. 2023/06/20 00:13:40 fuzzer started 2023/06/20 00:13:40 dialing manager at localhost:44161 2023/06/20 00:13:40 checking machine... 2023/06/20 00:13:40 checking revisions... [ 42.618892] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:13:41 testing simple program... [ 42.674193] cgroup: Unknown subsys name 'net' [ 42.722080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002b6be8c RSI=ffffffff83644344 RDI=ffff888015b5f408 RBP=ffff888015b5f460 RSP=ffff888015b5f398 R8 =0000000000000001 R9 =ffff888015b5f448 R10=0000000000038001 R11=000000000008ab54 R12=ffff888015b5f4d0 R13=0000000000000000 R14=ffff8880159951c0 R15=ffff888015b5f408 RIP=ffffffff8113062c 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 00007f2247c0e700 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=00007f7c61ed3cb0 CR3=0000000018734000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363032 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=1ffff110028f7d3d RBX=ffff8880147be9e8 RCX=1ffff110028f7d44 RDX=1ffff110028f7d89 RSI=ffffffff87b86f80 RDI=ffff88800f55ec50 RBP=ffff88800f55ec48 RSP=ffff888009a27788 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880147bec48 R13=dffffc0000000000 R14=ffff8880147bec28 R15=ffff8880147bebe0 RIP=ffffffff844cdcca RFL=00000046 [---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 00007fc8e7fc0900 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=00007fffed308000 CR3=000000000dba2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000