syzkaller login: [ 33.041857] BUG: Bad rss-counter state mm:00000000fd1486f3 type:MM_FILEPAGES val:33 [ 33.042619] BUG: Bad rss-counter state mm:00000000fd1486f3 type:MM_ANONPAGES val:22 [ 33.168619] ================================================================== [ 33.169308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.169994] Read of size 8 at addr ffff8880102b1df0 by task sshd/220 [ 33.170547] [ 33.170732] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.171377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.172137] Call Trace: [ 33.172375] [ 33.172586] dump_stack_lvl+0x91/0xf0 [ 33.173057] print_report+0xcc/0x620 [ 33.173430] ? __virt_addr_valid+0x102/0x340 [ 33.173857] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.174318] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.174806] kasan_report+0xbe/0xf0 [ 33.175176] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.175631] vma_interval_tree_remove+0xc75/0xec0 [ 33.176069] vma_prepare+0xc54/0x11a0 [ 33.176421] __split_vma+0x5af/0x950 [ 33.176776] ? __pfx___split_vma+0x10/0x10 [ 33.177159] ? find_held_lock+0x2c/0x110 [ 33.177543] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.177952] ? lock_is_held_type+0x9f/0x120 [ 33.178346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.178800] ? mtree_range_walk+0x632/0x900 [ 33.179218] ? mas_walk+0x5c7/0x7c0 [ 33.179566] do_vmi_munmap+0x1f1/0x2b0 [ 33.179922] mmap_region+0x1f9/0x2660 [ 33.180270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.180653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.181169] ? __pfx_lock_acquire+0x10/0x10 [ 33.181559] ? __pfx_mmap_region+0x10/0x10 [ 33.181985] ? security_mmap_addr+0x7d/0xa0 [ 33.182380] ? get_unmapped_area+0x1f5/0x3f0 [ 33.182784] do_mmap+0x854/0xf00 [ 33.183135] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.183509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.183927] ksys_mmap_pgoff+0x3af/0x500 [ 33.184296] do_syscall_64+0x3f/0x90 [ 33.184639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.185134] RIP: 0033:0x7f070c3f0d82 [ 33.185466] 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 [ 33.187013] RSP: 002b:00007ffec2458998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.187689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f070c3f0d82 [ 33.188288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f070b82a000 [ 33.188914] RBP: 00007f070b82a000 R08: 0000000000000009 R09: 0000000000001000 [ 33.189530] R10: 0000000000000812 R11: 0000000000000206 R12: 000055961852bec0 [ 33.190144] R13: 00007ffec24589b0 R14: 00007ffec24589e0 R15: 00007ffec2458d40 [ 33.190809] [ 33.191025] [ 33.191182] Allocated by task 213: [ 33.191504] kasan_save_stack+0x22/0x50 [ 33.191918] kasan_set_track+0x25/0x30 [ 33.192270] __kasan_slab_alloc+0x59/0x70 [ 33.192654] kmem_cache_alloc+0x16b/0x370 [ 33.193023] vm_area_dup+0x20/0x160 [ 33.193368] __split_vma+0x170/0x950 [ 33.193708] split_vma+0xc6/0x110 [ 33.194028] mprotect_fixup+0x8d2/0xb30 [ 33.194390] do_mprotect_pkey+0x87e/0xd40 [ 33.194772] __x64_sys_mprotect+0x78/0xc0 [ 33.195182] do_syscall_64+0x3f/0x90 [ 33.195534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.196003] [ 33.196161] Freed by task 213: [ 33.196441] kasan_save_stack+0x22/0x50 [ 33.196809] kasan_set_track+0x25/0x30 [ 33.197167] kasan_save_free_info+0x2b/0x50 [ 33.197545] __kasan_slab_free+0x10a/0x190 [ 33.197922] kmem_cache_free+0x10d/0x4d0 [ 33.198290] rcu_core+0x8c8/0x2860 [ 33.198613] __do_softirq+0x1b7/0x7d4 [ 33.198974] [ 33.199132] Last potentially related work creation: [ 33.199551] kasan_save_stack+0x22/0x50 [ 33.199909] __kasan_record_aux_stack+0x8e/0xa0 [ 33.200323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.200831] remove_vma+0x139/0x170 [ 33.201158] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.201560] do_vmi_munmap+0x1f1/0x2b0 [ 33.201948] __vm_munmap+0x138/0x3a0 [ 33.202290] __x64_sys_munmap+0x59/0x80 [ 33.202655] do_syscall_64+0x3f/0x90 [ 33.203027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.203484] [ 33.203638] The buggy address belongs to the object at ffff8880102b1d98 [ 33.203638] which belongs to the cache vm_area_struct of size 168 [ 33.204692] The buggy address is located 88 bytes inside of [ 33.204692] freed 168-byte region [ffff8880102b1d98, ffff8880102b1e40) [ 33.205721] [ 33.205903] The buggy address belongs to the physical page: [ 33.206392] page:00000000bf6b0eca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b1 [ 33.207224] memcg:ffff888019181001 [ 33.207536] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.208030] page_type: 0xffffffff() [ 33.208368] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.209089] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019181001 [ 33.209753] page dumped because: kasan: bad access detected [ 33.210239] [ 33.210398] Memory state around the buggy address: [ 33.210844] ffff8880102b1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.211468] ffff8880102b1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.212097] >ffff8880102b1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.212718] ^ [ 33.213308] ffff8880102b1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.213927] ffff8880102b1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.214563] ================================================================== [ 33.215345] Disabling lock debugging due to kernel taint [ 34.736237] BUG: Bad rss-counter state mm:00000000dc13714d type:MM_FILEPAGES val:33 [ 34.736996] BUG: Bad rss-counter state mm:00000000dc13714d type:MM_ANONPAGES val:22 [ 35.115378] BUG: Bad rss-counter state mm:0000000063177146 type:MM_FILEPAGES val:33 [ 35.116146] BUG: Bad rss-counter state mm:0000000063177146 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43727' (ECDSA) to the list of known hosts. 2023/06/20 09:09:38 fuzzer started 2023/06/20 09:09:38 dialing manager at localhost:44161 2023/06/20 09:09:38 checking machine... 2023/06/20 09:09:38 checking revisions... [ 35.685221] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:09:38 testing simple program... [ 35.719972] cgroup: Unknown subsys name 'net' [ 35.751598] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:09:36 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff856529e0 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffffffff856529e0 RBP=ffffffff8661f20f RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8661f20f R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e3f6500 RIP=ffffffff814c07f1 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 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=00007ffea4747ba8 CR3=000000000fbd4000 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=2038333a39303a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000009fa RBX=00000000000002f1 RCX=1ffff11001e8ce26 RDX=ffff888010c40000 RSI=ffffffff81f3c075 RDI=ffff888015c2fbc4 RBP=ffff888015c2fbc0 RSP=ffff888015c2fa38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=00000000000b6996 R12=ffff888010c44fd0 R13=0000000000007fff R14=00000000000002f1 R15=0000000000000031 RIP=ffffffff81f3c1d7 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 00007fc7f5719900 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=00007fc7f5cd10b0 CR3=000000000fd48000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000