syzkaller login: [ 31.462492] BUG: Bad rss-counter state mm:00000000ce225643 type:MM_FILEPAGES val:33 [ 31.463859] BUG: Bad rss-counter state mm:00000000ce225643 type:MM_ANONPAGES val:22 [ 31.624745] ================================================================== [ 31.625655] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.626598] Read of size 8 at addr ffff88801a2faa50 by task sshd/221 [ 31.627405] [ 31.627626] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.628730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.629747] Call Trace: [ 31.630080] [ 31.630373] dump_stack_lvl+0x91/0xf0 [ 31.630885] print_report+0xcc/0x620 [ 31.631405] ? __virt_addr_valid+0x102/0x340 [ 31.631972] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633225] kasan_report+0xbe/0xf0 [ 31.633706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.634328] vma_interval_tree_remove+0xc75/0xec0 [ 31.634933] vma_prepare+0xc54/0x11a0 [ 31.635453] __split_vma+0x5af/0x950 [ 31.635929] ? __pfx___split_vma+0x10/0x10 [ 31.636465] ? find_held_lock+0x2c/0x110 [ 31.637000] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.637585] ? lock_is_held_type+0x9f/0x120 [ 31.638124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.638745] ? mtree_range_walk+0x632/0x900 [ 31.639324] ? mas_walk+0x5c7/0x7c0 [ 31.639802] do_vmi_munmap+0x1f1/0x2b0 [ 31.640301] mmap_region+0x1f9/0x2660 [ 31.640790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.641309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.642025] ? __pfx_lock_acquire+0x10/0x10 [ 31.642558] ? __pfx_mmap_region+0x10/0x10 [ 31.643122] ? security_mmap_addr+0x7d/0xa0 [ 31.643661] ? get_unmapped_area+0x1f5/0x3f0 [ 31.644227] do_mmap+0x854/0xf00 [ 31.644667] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.645165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.645730] ksys_mmap_pgoff+0x3af/0x500 [ 31.646249] do_syscall_64+0x3f/0x90 [ 31.646736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647394] RIP: 0033:0x7f30f31d3d82 [ 31.647860] 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 [ 31.650007] RSP: 002b:00007ffcb9b149b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.650920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30f31d3d82 [ 31.651778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30f260d000 [ 31.652634] RBP: 00007f30f260d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.653497] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0670bcec0 [ 31.654358] R13: 00007ffcb9b149d0 R14: 00007ffcb9b14a00 R15: 00007ffcb9b14d60 [ 31.655247] [ 31.655545] [ 31.655759] Allocated by task 214: [ 31.656199] kasan_save_stack+0x22/0x50 [ 31.656708] kasan_set_track+0x25/0x30 [ 31.657214] __kasan_slab_alloc+0x59/0x70 [ 31.657744] kmem_cache_alloc+0x16b/0x370 [ 31.658264] vm_area_dup+0x20/0x160 [ 31.658729] __split_vma+0x170/0x950 [ 31.659198] split_vma+0xc6/0x110 [ 31.659649] mprotect_fixup+0x8d2/0xb30 [ 31.660151] do_mprotect_pkey+0x87e/0xd40 [ 31.660683] __x64_sys_mprotect+0x78/0xc0 [ 31.661205] do_syscall_64+0x3f/0x90 [ 31.661682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662330] [ 31.662546] Freed by task 214: [ 31.662938] kasan_save_stack+0x22/0x50 [ 31.663466] kasan_set_track+0x25/0x30 [ 31.663965] kasan_save_free_info+0x2b/0x50 [ 31.664503] __kasan_slab_free+0x10a/0x190 [ 31.665041] kmem_cache_free+0x10d/0x4d0 [ 31.665561] rcu_core+0x8c8/0x2860 [ 31.666013] __do_softirq+0x1b7/0x7d4 [ 31.666498] [ 31.666717] Last potentially related work creation: [ 31.667317] kasan_save_stack+0x22/0x50 [ 31.667828] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.669055] remove_vma+0x139/0x170 [ 31.669512] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.670085] do_vmi_munmap+0x1f1/0x2b0 [ 31.670571] __vm_munmap+0x138/0x3a0 [ 31.671053] __x64_sys_munmap+0x59/0x80 [ 31.671576] do_syscall_64+0x3f/0x90 [ 31.672060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672716] [ 31.672934] The buggy address belongs to the object at ffff88801a2fa9f8 [ 31.672934] which belongs to the cache vm_area_struct of size 168 [ 31.674423] The buggy address is located 88 bytes inside of [ 31.674423] freed 168-byte region [ffff88801a2fa9f8, ffff88801a2faaa0) [ 31.675856] [ 31.676075] The buggy address belongs to the physical page: [ 31.676739] page:00000000a0d480bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2fa [ 31.677835] memcg:ffff8880096b1f01 [ 31.678279] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.678929] page_type: 0xffffffff() [ 31.679405] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.680338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b1f01 [ 31.681256] page dumped because: kasan: bad access detected [ 31.681918] [ 31.682136] Memory state around the buggy address: [ 31.682724] ffff88801a2fa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.683616] ffff88801a2fa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.684500] >ffff88801a2faa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.685369] ^ [ 31.686099] ffff88801a2faa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.686966] ffff88801a2fab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.687836] ================================================================== [ 31.689049] Disabling lock debugging due to kernel taint [ 34.241559] BUG: Bad rss-counter state mm:00000000a81269c0 type:MM_FILEPAGES val:33 [ 34.242633] BUG: Bad rss-counter state mm:00000000a81269c0 type:MM_ANONPAGES val:22 [ 34.729944] BUG: Bad rss-counter state mm:00000000b85c6e03 type:MM_FILEPAGES val:33 [ 34.731155] BUG: Bad rss-counter state mm:00000000b85c6e03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47466' (ECDSA) to the list of known hosts. 2023/06/21 06:35:40 fuzzer started 2023/06/21 06:35:41 dialing manager at localhost:36067 2023/06/21 06:35:41 checking machine... 2023/06/21 06:35:41 checking revisions... [ 35.446525] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:35:41 testing simple program... [ 35.493681] cgroup: Unknown subsys name 'net' [ 35.529883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88801006b670 RIP=ffffffff812d86d9 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=00007f6f08086c50 CR3=0000000016642000 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=2030343a35333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138eb5 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c271d6 RBP=ffff88801675eff0 RSP=ffff88801675ef28 R8 =ffffffff86138eb4 R9 =ffff88801675efd8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801675eff8 R13=ffff88801675efe0 R14=ffff88801675efd9 R15=ffff88801675ef98 RIP=ffffffff81130aa4 RFL=00000213 [----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 00007fc2ba874900 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=00007fc2ba853020 CR3=00000000182c0000 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