syzkaller login: [ 31.101213] BUG: Bad rss-counter state mm:00000000b35e0444 type:MM_FILEPAGES val:33 [ 31.102405] BUG: Bad rss-counter state mm:00000000b35e0444 type:MM_ANONPAGES val:22 [ 31.248770] ================================================================== [ 31.249857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.251002] Read of size 8 at addr ffff88800dcd33f8 by task sshd/221 [ 31.252150] [ 31.252406] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.253404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254426] Call Trace: [ 31.254749] <TASK> [ 31.255037] dump_stack_lvl+0x91/0xf0 [ 31.255554] print_report+0xcc/0x620 [ 31.256058] ? __virt_addr_valid+0x102/0x340 [ 31.256605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257900] kasan_report+0xbe/0xf0 [ 31.258376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259034] vma_interval_tree_remove+0xc75/0xec0 [ 31.259643] vma_prepare+0xc54/0x11a0 [ 31.260121] __split_vma+0x5af/0x950 [ 31.260631] ? __pfx___split_vma+0x10/0x10 [ 31.261175] ? find_held_lock+0x2c/0x110 [ 31.261695] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262294] ? lock_is_held_type+0x9f/0x120 [ 31.262844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.263449] ? mtree_range_walk+0x632/0x900 [ 31.264043] ? mas_walk+0x5c7/0x7c0 [ 31.264521] do_vmi_munmap+0x1f1/0x2b0 [ 31.265070] mmap_region+0x1f9/0x2660 [ 31.265554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266825] ? __pfx_lock_acquire+0x10/0x10 [ 31.267359] ? __pfx_mmap_region+0x10/0x10 [ 31.267935] ? security_mmap_addr+0x7d/0xa0 [ 31.268467] ? get_unmapped_area+0x1f5/0x3f0 [ 31.269052] do_mmap+0x854/0xf00 [ 31.269513] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270624] ksys_mmap_pgoff+0x3af/0x500 [ 31.271138] do_syscall_64+0x3f/0x90 [ 31.271619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272276] RIP: 0033:0x7fe75084ed82 [ 31.272752] 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 [ 31.274968] RSP: 002b:00007fffecc6eab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe75084ed82 [ 31.276770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe74fc88000 [ 31.277643] RBP: 00007fe74fc88000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278486] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eadf359d90 [ 31.279365] R13: 00007fffecc6ead0 R14: 00007fffecc6eb00 R15: 00007fffecc6ee60 [ 31.280210] </TASK> [ 31.280512] [ 31.280752] Allocated by task 214: [ 31.281181] kasan_save_stack+0x22/0x50 [ 31.281682] kasan_set_track+0x25/0x30 [ 31.282174] __kasan_slab_alloc+0x59/0x70 [ 31.282693] kmem_cache_alloc+0x16b/0x370 [ 31.283245] vm_area_dup+0x20/0x160 [ 31.283696] __split_vma+0x170/0x950 [ 31.284170] split_vma+0xc6/0x110 [ 31.284649] mprotect_fixup+0x8d2/0xb30 [ 31.285171] do_mprotect_pkey+0x87e/0xd40 [ 31.285735] __x64_sys_mprotect+0x78/0xc0 [ 31.286262] do_syscall_64+0x3f/0x90 [ 31.286731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287415] [ 31.287631] Freed by task 214: [ 31.288019] kasan_save_stack+0x22/0x50 [ 31.288564] kasan_set_track+0x25/0x30 [ 31.289062] kasan_save_free_info+0x2b/0x50 [ 31.289632] __kasan_slab_free+0x10a/0x190 [ 31.290159] kmem_cache_free+0x10d/0x4d0 [ 31.290664] rcu_core+0x8c8/0x2860 [ 31.291116] __do_softirq+0x1b7/0x7d4 [ 31.291633] [ 31.291847] Last potentially related work creation: [ 31.292479] kasan_save_stack+0x22/0x50 [ 31.292995] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294194] remove_vma+0x139/0x170 [ 31.294642] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295193] do_vmi_munmap+0x1f1/0x2b0 [ 31.295671] __vm_munmap+0x138/0x3a0 [ 31.296134] __x64_sys_munmap+0x59/0x80 [ 31.296624] do_syscall_64+0x3f/0x90 [ 31.297113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297750] [ 31.297963] The buggy address belongs to the object at ffff88800dcd33a0 [ 31.297963] which belongs to the cache vm_area_struct of size 168 [ 31.299591] The buggy address is located 88 bytes inside of [ 31.299591] freed 168-byte region [ffff88800dcd33a0, ffff88800dcd3448) [ 31.300982] [ 31.301195] The buggy address belongs to the physical page: [ 31.301846] page:00000000b482f207 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcd3 [ 31.302915] memcg:ffff888013be2e01 [ 31.303333] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303968] page_type: 0xffffffff() [ 31.304418] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.305519] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013be2e01 [ 31.306425] page dumped because: kasan: bad access detected [ 31.307080] [ 31.307293] Memory state around the buggy address: [ 31.307865] ffff88800dcd3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.308716] ffff88800dcd3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.309561] >ffff88800dcd3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.310406] ^ [ 31.311239] ffff88800dcd3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.312080] ffff88800dcd3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312945] ================================================================== [ 31.313859] Disabling lock debugging due to kernel taint [ 33.688242] BUG: Bad rss-counter state mm:00000000962f8b37 type:MM_FILEPAGES val:33 [ 33.689779] BUG: Bad rss-counter state mm:00000000962f8b37 type:MM_ANONPAGES val:22 [ 34.174660] BUG: Bad rss-counter state mm:00000000ff4c1fbb type:MM_FILEPAGES val:33 [ 34.176023] BUG: Bad rss-counter state mm:00000000ff4c1fbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28180' (ECDSA) to the list of known hosts. 2023/06/20 23:00:29 fuzzer started 2023/06/20 23:00:29 dialing manager at localhost:36067 2023/06/20 23:00:29 checking machine... 2023/06/20 23:00:29 checking revisions... [ 34.893870] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:00:30 testing simple program... [ 34.939158] cgroup: Unknown subsys name 'net' [ 34.991858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:00:29 Registers: info registers vcpu 0 RAX=ffffffff86620ca1 RBX=ffffffff86057610 RCX=ffffffff866212de RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff8605731c RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86057908 R13=ffffffff85d7a9c4 R14=ffffffff86057318 R15=dffffc0000000000 RIP=ffffffff8112fc99 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 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=00007ffaf97e64d0 CR3=000000000f23a000 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=2039323a30303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad746 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88800f126f98 R8 =ffffffff860d8256 R9 =ffff88800f127090 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---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 00007f4d8fa17900 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=00007f4d8f9f6020 CR3=000000000e694000 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