syzkaller login: [ 70.030425] BUG: Bad rss-counter state mm:00000000a6d3501e type:MM_FILEPAGES val:33 [ 70.031832] BUG: Bad rss-counter state mm:00000000a6d3501e type:MM_ANONPAGES val:22 [ 70.086930] ================================================================== [ 70.087896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.088930] Read of size 8 at addr ffff8880199b8df0 by task sshd/219 [ 70.089745] [ 70.089978] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.091080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.092127] Call Trace: [ 70.092468] [ 70.092774] dump_stack_lvl+0x91/0xf0 [ 70.093297] print_report+0xcc/0x620 [ 70.093814] ? __virt_addr_valid+0x102/0x340 [ 70.094419] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.095074] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.095727] kasan_report+0xbe/0xf0 [ 70.096240] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.096924] vma_interval_tree_remove+0xc75/0xec0 [ 70.097587] vma_prepare+0xc54/0x11a0 [ 70.098114] __split_vma+0x5af/0x950 [ 70.098663] ? __pfx___split_vma+0x10/0x10 [ 70.099247] ? find_held_lock+0x2c/0x110 [ 70.099818] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.100438] ? lock_is_held_type+0x9f/0x120 [ 70.101024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.101695] ? mtree_range_walk+0x632/0x900 [ 70.102312] ? mas_walk+0x5c7/0x7c0 [ 70.102834] do_vmi_munmap+0x1f1/0x2b0 [ 70.103379] mmap_region+0x1f9/0x2660 [ 70.103915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.104478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.105263] ? __pfx_lock_acquire+0x10/0x10 [ 70.105852] ? __pfx_mmap_region+0x10/0x10 [ 70.106443] ? security_mmap_addr+0x7d/0xa0 [ 70.107029] ? get_unmapped_area+0x1f5/0x3f0 [ 70.107641] do_mmap+0x854/0xf00 [ 70.108126] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.108669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.109285] ksys_mmap_pgoff+0x3af/0x500 [ 70.109846] do_syscall_64+0x3f/0x90 [ 70.110396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.111106] RIP: 0033:0x7f279675bd82 [ 70.111613] 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 [ 70.113957] RSP: 002b:00007ffdc34877c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.114967] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f279675bd82 [ 70.115903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2795b95000 [ 70.116832] RBP: 00007f2795b95000 R08: 0000000000000009 R09: 0000000000001000 [ 70.117768] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc4e539ec0 [ 70.118729] R13: 00007ffdc34877e0 R14: 00007ffdc3487810 R15: 00007ffdc3487b70 [ 70.119676] [ 70.120000] [ 70.120234] Allocated by task 212: [ 70.120716] kasan_save_stack+0x22/0x50 [ 70.121274] kasan_set_track+0x25/0x30 [ 70.121820] __kasan_slab_alloc+0x59/0x70 [ 70.122405] kmem_cache_alloc+0x16b/0x370 [ 70.122979] vm_area_dup+0x20/0x160 [ 70.123484] __split_vma+0x170/0x950 [ 70.123999] split_vma+0xc6/0x110 [ 70.124482] mprotect_fixup+0x8d2/0xb30 [ 70.125042] do_mprotect_pkey+0x87e/0xd40 [ 70.125617] __x64_sys_mprotect+0x78/0xc0 [ 70.126209] do_syscall_64+0x3f/0x90 [ 70.126731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.127434] [ 70.127668] Freed by task 212: [ 70.128101] kasan_save_stack+0x22/0x50 [ 70.128702] kasan_set_track+0x25/0x30 [ 70.129255] kasan_save_free_info+0x2b/0x50 [ 70.129840] __kasan_slab_free+0x10a/0x190 [ 70.130436] kmem_cache_free+0x10d/0x4d0 [ 70.130997] rcu_core+0x8c8/0x2860 [ 70.131488] __do_softirq+0x1b7/0x7d4 [ 70.132014] [ 70.132252] Last potentially related work creation: [ 70.132899] kasan_save_stack+0x22/0x50 [ 70.133455] __kasan_record_aux_stack+0x8e/0xa0 [ 70.134087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.134812] remove_vma+0x139/0x170 [ 70.135311] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.135932] do_vmi_munmap+0x1f1/0x2b0 [ 70.136472] __vm_munmap+0x138/0x3a0 [ 70.136993] __x64_sys_munmap+0x59/0x80 [ 70.137544] do_syscall_64+0x3f/0x90 [ 70.138069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.138780] [ 70.139020] The buggy address belongs to the object at ffff8880199b8d98 [ 70.139020] which belongs to the cache vm_area_struct of size 168 [ 70.140643] The buggy address is located 88 bytes inside of [ 70.140643] freed 168-byte region [ffff8880199b8d98, ffff8880199b8e40) [ 70.142210] [ 70.142447] The buggy address belongs to the physical page: [ 70.143176] page:000000000f8e1b24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199b8 [ 70.144382] memcg:ffff88800ebedb01 [ 70.144856] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.145573] page_type: 0xffffffff() [ 70.146073] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.147118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebedb01 [ 70.148125] page dumped because: kasan: bad access detected [ 70.148869] [ 70.149106] Memory state around the buggy address: [ 70.149751] ffff8880199b8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 70.150710] ffff8880199b8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 70.151662] >ffff8880199b8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 70.152571] ^ [ 70.153438] ffff8880199b8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 70.154368] ffff8880199b8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.155280] ================================================================== [ 70.156390] Disabling lock debugging due to kernel taint [ 72.107323] BUG: Bad rss-counter state mm:000000000fd21d39 type:MM_FILEPAGES val:33 [ 72.108812] BUG: Bad rss-counter state mm:000000000fd21d39 type:MM_ANONPAGES val:22 [ 72.608168] BUG: Bad rss-counter state mm:0000000049384126 type:MM_FILEPAGES val:33 [ 72.609132] BUG: Bad rss-counter state mm:0000000049384126 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61171' (ECDSA) to the list of known hosts. 2023/06/20 03:00:52 fuzzer started 2023/06/20 03:00:53 dialing manager at localhost:44161 2023/06/20 03:00:53 checking machine... 2023/06/20 03:00:53 checking revisions... [ 73.355585] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:00:53 testing simple program... [ 73.409211] cgroup: Unknown subsys name 'net' [ 73.447446] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:00:14 Registers: info registers vcpu 0 RAX=ffffffff860f214b RBX=0000000000000001 RCX=ffffffff860f2148 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff860f214a RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000154e8 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800f947288 R15=ffff88806ce09a98 RIP=ffffffff811311e5 RFL=00000293 [--S-A-C] 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 00007f72526c8900 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=00007f7251b35080 CR3=000000000f726000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=31a455cbf88532c900000000000ae988 XMM05=ae3d204846bc771a0000000000139618 XMM06=806171799158d9670000000000138408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd123736650 CR3=000000000f54e000 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=2032353a30303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a30303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000