syzkaller login: [ 32.997845] BUG: Bad rss-counter state mm:00000000cb7fa196 type:MM_FILEPAGES val:33 [ 32.998846] BUG: Bad rss-counter state mm:00000000cb7fa196 type:MM_ANONPAGES val:22 [ 33.161105] ================================================================== [ 33.162148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.163077] Read of size 8 at addr ffff88800e4bcdf0 by task sshd/221 [ 33.163945] [ 33.164164] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.165033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.166031] Call Trace: [ 33.166350] [ 33.166634] dump_stack_lvl+0x91/0xf0 [ 33.167127] print_report+0xcc/0x620 [ 33.167610] ? __virt_addr_valid+0x102/0x340 [ 33.168156] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.168771] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.169405] kasan_report+0xbe/0xf0 [ 33.169882] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.170506] vma_interval_tree_remove+0xc75/0xec0 [ 33.171105] vma_prepare+0xc54/0x11a0 [ 33.171583] __split_vma+0x5af/0x950 [ 33.172053] ? __pfx___split_vma+0x10/0x10 [ 33.172577] ? find_held_lock+0x2c/0x110 [ 33.173100] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.173689] ? lock_is_held_type+0x9f/0x120 [ 33.174228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.174836] ? mtree_range_walk+0x632/0x900 [ 33.175390] ? mas_walk+0x5c7/0x7c0 [ 33.175867] do_vmi_munmap+0x1f1/0x2b0 [ 33.176362] mmap_region+0x1f9/0x2660 [ 33.176849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.177373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.178094] ? __pfx_lock_acquire+0x10/0x10 [ 33.178627] ? __pfx_mmap_region+0x10/0x10 [ 33.179158] ? security_mmap_addr+0x7d/0xa0 [ 33.179687] ? get_unmapped_area+0x1f5/0x3f0 [ 33.180243] do_mmap+0x854/0xf00 [ 33.180682] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.181197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.181762] ksys_mmap_pgoff+0x3af/0x500 [ 33.182269] do_syscall_64+0x3f/0x90 [ 33.182746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.183392] RIP: 0033:0x7fb14897fd82 [ 33.183848] 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 [ 33.185988] RSP: 002b:00007ffddad24ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.186892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb14897fd82 [ 33.187747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb147db9000 [ 33.188597] RBP: 00007fb147db9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.189455] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557af2b5fec0 [ 33.190300] R13: 00007ffddad24ad0 R14: 00007ffddad24b00 R15: 00007ffddad24e60 [ 33.191154] [ 33.191447] [ 33.191662] Allocated by task 214: [ 33.192095] kasan_save_stack+0x22/0x50 [ 33.192601] kasan_set_track+0x25/0x30 [ 33.193097] __kasan_slab_alloc+0x59/0x70 [ 33.193644] kmem_cache_alloc+0x16b/0x370 [ 33.194160] vm_area_dup+0x20/0x160 [ 33.194610] __split_vma+0x170/0x950 [ 33.195076] split_vma+0xc6/0x110 [ 33.195513] mprotect_fixup+0x8d2/0xb30 [ 33.196015] do_mprotect_pkey+0x87e/0xd40 [ 33.196537] __x64_sys_mprotect+0x78/0xc0 [ 33.197061] do_syscall_64+0x3f/0x90 [ 33.197548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.198194] [ 33.198411] Freed by task 211: [ 33.198817] kasan_save_stack+0x22/0x50 [ 33.199317] kasan_set_track+0x25/0x30 [ 33.199817] kasan_save_free_info+0x2b/0x50 [ 33.200344] __kasan_slab_free+0x10a/0x190 [ 33.200879] kmem_cache_free+0x10d/0x4d0 [ 33.201407] rcu_core+0x8c8/0x2860 [ 33.201851] __do_softirq+0x1b7/0x7d4 [ 33.202324] [ 33.202537] Last potentially related work creation: [ 33.203142] kasan_save_stack+0x22/0x50 [ 33.203674] __kasan_record_aux_stack+0x8e/0xa0 [ 33.204276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.204951] remove_vma+0x139/0x170 [ 33.205443] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.206029] do_vmi_munmap+0x1f1/0x2b0 [ 33.206540] __vm_munmap+0x138/0x3a0 [ 33.207032] __x64_sys_munmap+0x59/0x80 [ 33.207550] do_syscall_64+0x3f/0x90 [ 33.208047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.208714] [ 33.208937] The buggy address belongs to the object at ffff88800e4bcd98 [ 33.208937] which belongs to the cache vm_area_struct of size 168 [ 33.210490] The buggy address is located 88 bytes inside of [ 33.210490] freed 168-byte region [ffff88800e4bcd98, ffff88800e4bce40) [ 33.211904] [ 33.212120] The buggy address belongs to the physical page: [ 33.212776] page:000000004a9b69c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4bc [ 33.213880] memcg:ffff88800e50c601 [ 33.214309] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.214954] page_type: 0xffffffff() [ 33.215408] raw: 0100000000000200 ffff88800879fc80 ffffea000037cc00 dead000000000008 [ 33.216325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e50c601 [ 33.217239] page dumped because: kasan: bad access detected [ 33.217893] [ 33.218111] Memory state around the buggy address: [ 33.218712] ffff88800e4bcc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.219572] ffff88800e4bcd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.220427] >ffff88800e4bcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.221291] ^ [ 33.222118] ffff88800e4bce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.222973] ffff88800e4bce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.223839] ================================================================== [ 33.224844] Disabling lock debugging due to kernel taint [ 35.203328] BUG: Bad rss-counter state mm:00000000bc152f71 type:MM_FILEPAGES val:33 [ 35.203954] BUG: Bad rss-counter state mm:00000000bc152f71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17038' (ECDSA) to the list of known hosts. [ 35.808930] BUG: Bad rss-counter state mm:000000004d99c3e5 type:MM_FILEPAGES val:33 [ 35.810070] BUG: Bad rss-counter state mm:000000004d99c3e5 type:MM_ANONPAGES val:22 2023/06/19 11:45:22 fuzzer started 2023/06/19 11:45:22 dialing manager at localhost:44161 2023/06/19 11:45:22 checking machine... 2023/06/19 11:45:22 checking revisions... [ 36.433974] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:45:23 testing simple program... [ 36.483988] cgroup: Unknown subsys name 'net' [ 36.532970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff810bd047 RDI=ffff88806ce09b68 RBP=000000000000000b RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b67 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015cf1b40 R15=ffff88800dff0670 RIP=ffffffff813ad46e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa812eed700 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=00007f61f8ab0b90 CR3=0000000016cfc000 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=485320415352203a3268737320363430 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=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff110011caf31 RSI=ffffffff8180c522 RDI=ffff888008e579f8 RBP=ffff888008e579c8 RSP=ffff888008e57928 R8 =ffffffff860d68fa R9 =ffff888008e57970 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008e579f8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800f039a80 RIP=ffffffff84532440 RFL=00000286 [--S--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 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=00007fff3a8e6000 CR3=00000000181e0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000