syzkaller login: [ 40.962291] BUG: Bad rss-counter state mm:0000000088c7d107 type:MM_FILEPAGES val:33 [ 40.963368] BUG: Bad rss-counter state mm:0000000088c7d107 type:MM_ANONPAGES val:22 [ 41.187122] ================================================================== [ 41.187727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.188341] Read of size 8 at addr ffff888015b09140 by task sshd/221 [ 41.188829] [ 41.188974] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.189548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.190178] Call Trace: [ 41.190395] [ 41.190583] dump_stack_lvl+0x91/0xf0 [ 41.190910] print_report+0xcc/0x620 [ 41.191231] ? __virt_addr_valid+0x102/0x340 [ 41.191594] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.191999] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.192403] kasan_report+0xbe/0xf0 [ 41.192721] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.193129] vma_interval_tree_remove+0xc75/0xec0 [ 41.197568] vma_prepare+0xc54/0x11a0 [ 41.197889] __split_vma+0x5af/0x950 [ 41.198198] ? __pfx___split_vma+0x10/0x10 [ 41.198547] ? find_held_lock+0x2c/0x110 [ 41.198895] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.199266] ? lock_is_held_type+0x9f/0x120 [ 41.199624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.200022] ? mtree_range_walk+0x632/0x900 [ 41.200388] ? mas_walk+0x5c7/0x7c0 [ 41.200704] do_vmi_munmap+0x1f1/0x2b0 [ 41.201032] mmap_region+0x1f9/0x2660 [ 41.201353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.205728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.206199] ? __pfx_lock_acquire+0x10/0x10 [ 41.206549] ? __pfx_mmap_region+0x10/0x10 [ 41.206901] ? security_mmap_addr+0x7d/0xa0 [ 41.207254] ? get_unmapped_area+0x1f5/0x3f0 [ 41.207615] do_mmap+0x854/0xf00 [ 41.207908] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.208237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.208636] ksys_mmap_pgoff+0x3af/0x500 [ 41.208972] do_syscall_64+0x3f/0x90 [ 41.209290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.209781] RIP: 0033:0x7f74f9fcdd82 [ 41.210082] 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 [ 41.211437] RSP: 002b:00007fff93350bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.212025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74f9fcdd82 [ 41.212570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74f9407000 [ 41.213118] RBP: 00007f74f9407000 R08: 0000000000000009 R09: 0000000000001000 [ 41.213714] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f31cda0f70 [ 41.214262] R13: 00007fff93350bf0 R14: 00007fff93350c20 R15: 00007fff93350f80 [ 41.214818] [ 41.215013] [ 41.215157] Allocated by task 213: [ 41.215437] kasan_save_stack+0x22/0x50 [ 41.215776] kasan_set_track+0x25/0x30 [ 41.216101] __kasan_slab_alloc+0x59/0x70 [ 41.216446] kmem_cache_alloc+0x16b/0x370 [ 41.216784] vm_area_dup+0x20/0x160 [ 41.217085] __split_vma+0x170/0x950 [ 41.217387] split_vma+0xc6/0x110 [ 41.217694] mprotect_fixup+0x8d2/0xb30 [ 41.218024] do_mprotect_pkey+0x87e/0xd40 [ 41.218368] __x64_sys_mprotect+0x78/0xc0 [ 41.218713] do_syscall_64+0x3f/0x90 [ 41.219029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.219450] [ 41.219594] Freed by task 19: [ 41.219846] kasan_save_stack+0x22/0x50 [ 41.220179] kasan_set_track+0x25/0x30 [ 41.220505] kasan_save_free_info+0x2b/0x50 [ 41.220859] __kasan_slab_free+0x10a/0x190 [ 41.221212] kmem_cache_free+0x10d/0x4d0 [ 41.221583] rcu_core+0x8c8/0x2860 [ 41.221865] __do_softirq+0x1b7/0x7d4 [ 41.222179] [ 41.222322] Last potentially related work creation: [ 41.222692] kasan_save_stack+0x22/0x50 [ 41.223021] __kasan_record_aux_stack+0x8e/0xa0 [ 41.223384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.223768] remove_vma+0x139/0x170 [ 41.224034] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.224381] do_vmi_munmap+0x1f1/0x2b0 [ 41.224701] __vm_munmap+0x138/0x3a0 [ 41.225009] __x64_sys_munmap+0x59/0x80 [ 41.225335] do_syscall_64+0x3f/0x90 [ 41.225686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.226113] [ 41.226256] The buggy address belongs to the object at ffff888015b090e8 [ 41.226256] which belongs to the cache vm_area_struct of size 168 [ 41.227204] The buggy address is located 88 bytes inside of [ 41.227204] freed 168-byte region [ffff888015b090e8, ffff888015b09190) [ 41.228101] [ 41.228238] The buggy address belongs to the physical page: [ 41.228711] page:00000000a76ae8ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b09 [ 41.229416] memcg:ffff888013014c01 [ 41.229722] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.230178] page_type: 0xffffffff() [ 41.230477] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 41.231072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013014c01 [ 41.231658] page dumped because: kasan: bad access detected [ 41.232090] [ 41.232236] Memory state around the buggy address: [ 41.232622] ffff888015b09000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.233181] ffff888015b09080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 41.233771] >ffff888015b09100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.234315] ^ [ 41.234731] ffff888015b09180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 41.235280] ffff888015b09200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.235810] ================================================================== [ 41.236875] Disabling lock debugging due to kernel taint [ 44.435758] BUG: Bad rss-counter state mm:000000009bb307fb type:MM_FILEPAGES val:33 [ 44.436347] BUG: Bad rss-counter state mm:000000009bb307fb type:MM_ANONPAGES val:22 [ 45.255063] BUG: Bad rss-counter state mm:0000000091357b9c type:MM_FILEPAGES val:33 [ 45.256357] BUG: Bad rss-counter state mm:0000000091357b9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56638' (ECDSA) to the list of known hosts. 2023/06/20 08:23:11 fuzzer started 2023/06/20 08:23:11 dialing manager at localhost:44161 2023/06/20 08:23:11 checking machine... 2023/06/20 08:23:11 checking revisions... [ 46.264112] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:23:11 testing simple program... [ 46.340721] cgroup: Unknown subsys name 'net' [ 46.405263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:05 Registers: info registers vcpu 0 RAX=0000000000000018 RBX=0000000000000000 RCX=ffffffff8107f626 RDX=1ffff1100286a368 RSI=0000000000000008 RDI=ffff888009ca8000 RBP=ffff888009ca8000 RSP=ffff88801a167ab0 R8 =0000000000000001 R9 =ffffed1001395000 R10=ffff888009ca8007 R11=0000000000000000 R12=ffff888014351b40 R13=0000000000000000 R14=ffff888014353100 R15=ffff888014353126 RIP=ffffffff8107f68a 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 0000000000000000 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=00007f22901dc328 CR3=000000000da90000 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=2030313a33323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a33323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=1ffff11002c6809b RSI=ffffffff8171b2a0 RDI=ffff8880163404d8 RBP=ffff888016340000 RSP=ffff88800db1fe78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=00000000000003e0 R12=0000000000000000 R13=0000555ecec29fe8 R14=ffff88800c570838 R15=0000000000000040 RIP=ffffffff8171b2c5 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 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=0000555ecec29fe8 CR3=0000000015b56000 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=00000000000000000000000000000000 XMM02=2e34362d3638782d78756e696c2d646c XMM03=00000000000000000000000000000000 XMM04=ffffffffffffffffffff000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000