syzkaller login: [ 31.124669] BUG: Bad rss-counter state mm:0000000022099f55 type:MM_FILEPAGES val:33 [ 31.125930] BUG: Bad rss-counter state mm:0000000022099f55 type:MM_ANONPAGES val:22 [ 31.226748] ================================================================== [ 31.227660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228605] Read of size 8 at addr ffff88801650d310 by task sshd/220 [ 31.229396] [ 31.229615] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.230625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.231611] Call Trace: [ 31.231932] [ 31.232217] dump_stack_lvl+0x91/0xf0 [ 31.232748] print_report+0xcc/0x620 [ 31.233285] ? __virt_addr_valid+0x102/0x340 [ 31.233892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234516] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235134] kasan_report+0xbe/0xf0 [ 31.235617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236234] vma_interval_tree_remove+0xc75/0xec0 [ 31.236842] vma_prepare+0xc54/0x11a0 [ 31.237329] __split_vma+0x5af/0x950 [ 31.237817] ? __pfx___split_vma+0x10/0x10 [ 31.238348] ? find_held_lock+0x2c/0x110 [ 31.238883] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.239459] ? lock_is_held_type+0x9f/0x120 [ 31.240010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.240626] ? mtree_range_walk+0x632/0x900 [ 31.241180] ? mas_walk+0x5c7/0x7c0 [ 31.241672] do_vmi_munmap+0x1f1/0x2b0 [ 31.242225] mmap_region+0x1f9/0x2660 [ 31.242714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.243232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.243950] ? __pfx_lock_acquire+0x10/0x10 [ 31.244504] ? __pfx_mmap_region+0x10/0x10 [ 31.245044] ? security_mmap_addr+0x7d/0xa0 [ 31.245608] ? get_unmapped_area+0x1f5/0x3f0 [ 31.246169] do_mmap+0x854/0xf00 [ 31.246617] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.247124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.247691] ksys_mmap_pgoff+0x3af/0x500 [ 31.248207] do_syscall_64+0x3f/0x90 [ 31.248696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249365] RIP: 0033:0x7f91590f3d82 [ 31.249835] 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 [ 31.252007] RSP: 002b:00007ffd338ad2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91590f3d82 [ 31.253778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f915852d000 [ 31.254629] RBP: 00007f915852d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.255494] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8068c6f60 [ 31.256340] R13: 00007ffd338ad300 R14: 00007ffd338ad330 R15: 00007ffd338ad690 [ 31.257190] [ 31.257504] [ 31.257717] Allocated by task 213: [ 31.258145] kasan_save_stack+0x22/0x50 [ 31.258650] kasan_set_track+0x25/0x30 [ 31.259142] __kasan_slab_alloc+0x59/0x70 [ 31.259670] kmem_cache_alloc+0x16b/0x370 [ 31.260190] vm_area_dup+0x20/0x160 [ 31.260654] __split_vma+0x170/0x950 [ 31.261119] split_vma+0xc6/0x110 [ 31.261578] mprotect_fixup+0x8d2/0xb30 [ 31.262088] do_mprotect_pkey+0x87e/0xd40 [ 31.262616] __x64_sys_mprotect+0x78/0xc0 [ 31.263144] do_syscall_64+0x3f/0x90 [ 31.263630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264288] [ 31.264511] Freed by task 203: [ 31.264907] kasan_save_stack+0x22/0x50 [ 31.265433] kasan_set_track+0x25/0x30 [ 31.265928] kasan_save_free_info+0x2b/0x50 [ 31.266471] __kasan_slab_free+0x10a/0x190 [ 31.267018] kmem_cache_free+0x10d/0x4d0 [ 31.267539] rcu_core+0x8c8/0x2860 [ 31.267985] __do_softirq+0x1b7/0x7d4 [ 31.268469] [ 31.268688] Last potentially related work creation: [ 31.269294] kasan_save_stack+0x22/0x50 [ 31.269834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.270408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271064] remove_vma+0x139/0x170 [ 31.271525] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272145] do_vmi_munmap+0x1f1/0x2b0 [ 31.272637] __vm_munmap+0x138/0x3a0 [ 31.273112] __x64_sys_munmap+0x59/0x80 [ 31.273615] do_syscall_64+0x3f/0x90 [ 31.274099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274754] [ 31.274971] The buggy address belongs to the object at ffff88801650d2b8 [ 31.274971] which belongs to the cache vm_area_struct of size 168 [ 31.276473] The buggy address is located 88 bytes inside of [ 31.276473] freed 168-byte region [ffff88801650d2b8, ffff88801650d360) [ 31.277931] [ 31.278152] The buggy address belongs to the physical page: [ 31.278822] page:00000000fd38cb39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1650d [ 31.279940] memcg:ffff888016506a01 [ 31.280382] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.281030] page_type: 0xffffffff() [ 31.281502] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.282421] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016506a01 [ 31.283350] page dumped because: kasan: bad access detected [ 31.284007] [ 31.284221] Memory state around the buggy address: [ 31.284814] ffff88801650d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.285702] ffff88801650d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.286572] >ffff88801650d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.287440] ^ [ 31.287922] ffff88801650d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.288799] ffff88801650d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.289680] ================================================================== [ 31.290677] Disabling lock debugging due to kernel taint [ 33.183351] BUG: Bad rss-counter state mm:00000000bc4d8834 type:MM_FILEPAGES val:33 [ 33.184109] BUG: Bad rss-counter state mm:00000000bc4d8834 type:MM_ANONPAGES val:22 [ 33.570861] BUG: Bad rss-counter state mm:00000000f14e9a7f type:MM_FILEPAGES val:33 [ 33.572063] BUG: Bad rss-counter state mm:00000000f14e9a7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5586' (ECDSA) to the list of known hosts. 2023/06/21 02:02:56 fuzzer started 2023/06/21 02:02:57 dialing manager at localhost:36067 2023/06/21 02:02:57 checking machine... 2023/06/21 02:02:57 checking revisions... [ 34.220548] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:02:57 testing simple program... [ 34.286167] cgroup: Unknown subsys name 'net' [ 34.391242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:56 Registers: info registers vcpu 0 RAX=ffff888017f57e70 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888017f57401 RSI=ffff888017f57400 RDI=ffff888017f57400 RBP=ffff888017f57130 RSP=ffff888017f57060 R8 =0000000000000001 R9 =ffff888017f57118 R10=0000000000038001 R11=00000000000b3bfc R12=ffff888017f57138 R13=ffff888017f57120 R14=ffff888017f57400 R15=ffff888017f570d8 RIP=ffffffff8112fbf3 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 00007fe0223a5900 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=00007fe02235e008 CR3=000000000e35e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f6455a89e20 CR3=000000000d836000 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=56c37b76de31e882d74866310c1a4d74 XMM02=ec2efd57dc4c00df000000000011aa28 XMM03=13d1c50f7381af0d000000000011aaf8 XMM04=dfd27a26460ea95600000000000ae988 XMM05=19e9129bd510f2350000000000131e38 XMM06=87f3bc653dc88d180000000000130ca0 XMM07=e042d86d42eb936e0000000000122258 XMM08=13d1c50f7381af0d000000000011aaf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000