syzkaller login: [ 69.037029] BUG: Bad rss-counter state mm:00000000fddd461e type:MM_FILEPAGES val:33 [ 69.038259] BUG: Bad rss-counter state mm:00000000fddd461e type:MM_ANONPAGES val:22 [ 69.085706] ================================================================== [ 69.087185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.088588] Read of size 8 at addr ffff88801676fd08 by task sshd/229 [ 69.089815] [ 69.090160] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.091566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.093130] Call Trace: [ 69.093639] [ 69.094099] dump_stack_lvl+0x91/0xf0 [ 69.094900] print_report+0xcc/0x620 [ 69.095670] ? __virt_addr_valid+0x102/0x340 [ 69.096556] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.097546] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.098546] kasan_report+0xbe/0xf0 [ 69.099311] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.100298] vma_interval_tree_remove+0xc75/0xec0 [ 69.101256] vma_prepare+0xc54/0x11a0 [ 69.102022] __split_vma+0x5af/0x950 [ 69.102809] ? __pfx___split_vma+0x10/0x10 [ 69.103626] ? find_held_lock+0x2c/0x110 [ 69.104417] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.105301] ? lock_is_held_type+0x9f/0x120 [ 69.106123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.107071] ? mtree_range_walk+0x632/0x900 [ 69.107973] ? mas_walk+0x5c7/0x7c0 [ 69.108741] do_vmi_munmap+0x1f1/0x2b0 [ 69.109525] mmap_region+0x1f9/0x2660 [ 69.110289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.111135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.112273] ? __pfx_lock_acquire+0x10/0x10 [ 69.113115] ? __pfx_mmap_region+0x10/0x10 [ 69.113936] ? security_mmap_addr+0x7d/0xa0 [ 69.115100] ? get_unmapped_area+0x1f5/0x3f0 [ 69.115969] do_mmap+0x854/0xf00 [ 69.116658] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.117437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.118323] ksys_mmap_pgoff+0x3af/0x500 [ 69.119133] do_syscall_64+0x3f/0x90 [ 69.119884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.120882] RIP: 0033:0x7f6cc7ec4d82 [ 69.121607] 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 [ 69.124975] RSP: 002b:00007fff11a904f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.126391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cc7ec4d82 [ 69.127726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cc72fe000 [ 69.129045] RBP: 00007f6cc72fe000 R08: 0000000000000009 R09: 0000000000001000 [ 69.130348] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612a8057b20 [ 69.131647] R13: 00007fff11a90510 R14: 00007fff11a90540 R15: 00007fff11a908a0 [ 69.132928] [ 69.133377] [ 69.133704] Allocated by task 222: [ 69.134334] kasan_save_stack+0x22/0x50 [ 69.135121] kasan_set_track+0x25/0x30 [ 69.135878] __kasan_slab_alloc+0x59/0x70 [ 69.136660] kmem_cache_alloc+0x16b/0x370 [ 69.137436] vm_area_dup+0x20/0x160 [ 69.138114] __split_vma+0x170/0x950 [ 69.138837] split_vma+0xc6/0x110 [ 69.139497] mprotect_fixup+0x8d2/0xb30 [ 69.140280] do_mprotect_pkey+0x87e/0xd40 [ 69.141070] __x64_sys_mprotect+0x78/0xc0 [ 69.141851] do_syscall_64+0x3f/0x90 [ 69.142593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.143564] [ 69.143889] Freed by task 222: [ 69.144495] kasan_save_stack+0x22/0x50 [ 69.145254] kasan_set_track+0x25/0x30 [ 69.146004] kasan_save_free_info+0x2b/0x50 [ 69.146812] __kasan_slab_free+0x10a/0x190 [ 69.147606] kmem_cache_free+0x10d/0x4d0 [ 69.148371] rcu_core+0x8c8/0x2860 [ 69.149044] __do_softirq+0x1b7/0x7d4 [ 69.149759] [ 69.150086] Last potentially related work creation: [ 69.150984] kasan_save_stack+0x22/0x50 [ 69.151738] __kasan_record_aux_stack+0x8e/0xa0 [ 69.152593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.153558] remove_vma+0x139/0x170 [ 69.154252] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.155092] do_vmi_munmap+0x1f1/0x2b0 [ 69.155821] __vm_munmap+0x138/0x3a0 [ 69.156567] __x64_sys_munmap+0x59/0x80 [ 69.157359] do_syscall_64+0x3f/0x90 [ 69.158060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.159034] [ 69.159359] The buggy address belongs to the object at ffff88801676fcb0 [ 69.159359] which belongs to the cache vm_area_struct of size 168 [ 69.161399] The buggy address is located 88 bytes inside of [ 69.161399] freed 168-byte region [ffff88801676fcb0, ffff88801676fd58) [ 69.163195] [ 69.163396] The buggy address belongs to the physical page: [ 69.164012] page:0000000013ac49bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1676f [ 69.164928] memcg:ffff888017d71c01 [ 69.165261] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.165752] page_type: 0xffffffff() [ 69.166094] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.166818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d71c01 [ 69.167520] page dumped because: kasan: bad access detected [ 69.168028] [ 69.168191] Memory state around the buggy address: [ 69.168631] ffff88801676fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.169294] ffff88801676fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.169942] >ffff88801676fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.170604] ^ [ 69.170939] ffff88801676fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.171588] ffff88801676fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.172225] ================================================================== [ 69.173341] Disabling lock debugging due to kernel taint [ 71.069970] BUG: Bad rss-counter state mm:0000000011271924 type:MM_FILEPAGES val:33 [ 71.071079] BUG: Bad rss-counter state mm:0000000011271924 type:MM_ANONPAGES val:22 [ 71.622239] BUG: Bad rss-counter state mm:00000000a26c0ec3 type:MM_FILEPAGES val:33 [ 71.623587] BUG: Bad rss-counter state mm:00000000a26c0ec3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51438' (ECDSA) to the list of known hosts. 2023/06/21 00:29:29 fuzzer started 2023/06/21 00:29:29 dialing manager at localhost:36067 2023/06/21 00:29:29 checking machine... 2023/06/21 00:29:29 checking revisions... [ 72.364637] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:29:30 testing simple program... [ 72.416575] cgroup: Unknown subsys name 'net' [ 72.457262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:29:29 Registers: info registers vcpu 0 RAX=ffff88800fe70700 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001fce0e0 RSI=ffffffff83c20753 RDI=ffff8880097e8178 RBP=ffff88800fe70000 RSP=ffff8880141c79c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800fe70510 R13=ffff88800fe70700 R14=ffff88800fe701b8 R15=ffff8880097e8140 RIP=ffffffff83c20782 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 00007f82358e8700 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=00007f5514c8bb10 CR3=000000000ecec000 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=485320415352203a3268737320343731 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=ffff88800e4f4828 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019b4fb01 RSI=ffff888019b4fb80 RDI=ffff888019b4fb80 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff888019b4fb80 R15=ffff88806cf09a50 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f1cbb25b900 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=00007f1cbb23a020 CR3=000000000e7b0000 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=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