syzkaller login: [ 38.705927] BUG: Bad rss-counter state mm:00000000397d6d5f type:MM_FILEPAGES val:33 [ 38.707544] BUG: Bad rss-counter state mm:00000000397d6d5f type:MM_ANONPAGES val:22 [ 38.869025] ================================================================== [ 38.870114] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.871248] Read of size 8 at addr ffff8880095beed8 by task sshd/219 [ 38.872272] [ 38.872534] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.873570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.874772] Call Trace: [ 38.875155] [ 38.875457] dump_stack_lvl+0x91/0xf0 [ 38.875955] print_report+0xcc/0x620 [ 38.876438] ? __virt_addr_valid+0x102/0x340 [ 38.876995] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878288] kasan_report+0xbe/0xf0 [ 38.878778] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879392] vma_interval_tree_remove+0xc75/0xec0 [ 38.879997] vma_prepare+0xc54/0x11a0 [ 38.880470] __split_vma+0x5af/0x950 [ 38.880939] ? __pfx___split_vma+0x10/0x10 [ 38.881471] ? find_held_lock+0x2c/0x110 [ 38.881991] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.882564] ? lock_is_held_type+0x9f/0x120 [ 38.883100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.883716] ? mtree_range_walk+0x632/0x900 [ 38.884270] ? mas_walk+0x5c7/0x7c0 [ 38.884744] do_vmi_munmap+0x1f1/0x2b0 [ 38.885247] mmap_region+0x1f9/0x2660 [ 38.885718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.886231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.886962] ? __pfx_lock_acquire+0x10/0x10 [ 38.887494] ? __pfx_mmap_region+0x10/0x10 [ 38.888029] ? security_mmap_addr+0x7d/0xa0 [ 38.888559] ? get_unmapped_area+0x1f5/0x3f0 [ 38.889110] do_mmap+0x854/0xf00 [ 38.889550] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.890046] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.890613] ksys_mmap_pgoff+0x3af/0x500 [ 38.891119] do_syscall_64+0x3f/0x90 [ 38.891592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892239] RIP: 0033:0x7f6949a24d82 [ 38.892696] 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 [ 38.894835] RSP: 002b:00007ffdfaabfc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.895728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6949a24d82 [ 38.896566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6948e5e000 [ 38.897414] RBP: 00007f6948e5e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.898257] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bde6e9eb20 [ 38.899103] R13: 00007ffdfaabfc60 R14: 00007ffdfaabfc90 R15: 00007ffdfaabfff0 [ 38.899944] [ 38.900234] [ 38.900447] Allocated by task 212: [ 38.900882] kasan_save_stack+0x22/0x50 [ 38.901392] kasan_set_track+0x25/0x30 [ 38.901889] __kasan_slab_alloc+0x59/0x70 [ 38.902405] kmem_cache_alloc+0x16b/0x370 [ 38.902925] vm_area_dup+0x20/0x160 [ 38.903377] __split_vma+0x170/0x950 [ 38.903838] split_vma+0xc6/0x110 [ 38.904273] mprotect_fixup+0x8d2/0xb30 [ 38.904782] do_mprotect_pkey+0x87e/0xd40 [ 38.905306] __x64_sys_mprotect+0x78/0xc0 [ 38.905825] do_syscall_64+0x3f/0x90 [ 38.906295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906961] [ 38.907178] Freed by task 19: [ 38.907569] kasan_save_stack+0x22/0x50 [ 38.908068] kasan_set_track+0x25/0x30 [ 38.908564] kasan_save_free_info+0x2b/0x50 [ 38.909093] __kasan_slab_free+0x10a/0x190 [ 38.909621] kmem_cache_free+0x10d/0x4d0 [ 38.910130] rcu_core+0x8c8/0x2860 [ 38.910588] __do_softirq+0x1b7/0x7d4 [ 38.911062] [ 38.911279] Last potentially related work creation: [ 38.911873] kasan_save_stack+0x22/0x50 [ 38.912375] __kasan_record_aux_stack+0x8e/0xa0 [ 38.912942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.913573] remove_vma+0x139/0x170 [ 38.914019] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.914594] do_vmi_munmap+0x1f1/0x2b0 [ 38.915076] __vm_munmap+0x138/0x3a0 [ 38.915551] __x64_sys_munmap+0x59/0x80 [ 38.916044] do_syscall_64+0x3f/0x90 [ 38.916524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917166] [ 38.917383] The buggy address belongs to the object at ffff8880095bee80 [ 38.917383] which belongs to the cache vm_area_struct of size 168 [ 38.918857] The buggy address is located 88 bytes inside of [ 38.918857] freed 168-byte region [ffff8880095bee80, ffff8880095bef28) [ 38.920251] [ 38.920468] The buggy address belongs to the physical page: [ 38.921127] page:00000000ed6e4e95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95be [ 38.922216] memcg:ffff88800d322a01 [ 38.922645] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923286] page_type: 0xffffffff() [ 38.923730] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.924645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d322a01 [ 38.925538] page dumped because: kasan: bad access detected [ 38.926196] [ 38.926408] Memory state around the buggy address: [ 38.926983] ffff8880095bed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.927837] ffff8880095bee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.928678] >ffff8880095bee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929522] ^ [ 38.930282] ffff8880095bef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.931154] ffff8880095bef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.932003] ================================================================== [ 38.933247] Disabling lock debugging due to kernel taint [ 40.902985] BUG: Bad rss-counter state mm:0000000063887058 type:MM_FILEPAGES val:33 [ 40.903856] BUG: Bad rss-counter state mm:0000000063887058 type:MM_ANONPAGES val:22 [ 41.379626] BUG: Bad rss-counter state mm:00000000761d3f77 type:MM_FILEPAGES val:33 [ 41.380891] BUG: Bad rss-counter state mm:00000000761d3f77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55511' (ECDSA) to the list of known hosts. 2023/06/20 15:43:23 fuzzer started 2023/06/20 15:43:24 dialing manager at localhost:36067 2023/06/20 15:43:24 checking machine... 2023/06/20 15:43:24 checking revisions... [ 42.117607] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:43:24 testing simple program... [ 42.160437] cgroup: Unknown subsys name 'net' [ 42.201299] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:43:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860b9cfe RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860b9d02 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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=00007f867546cb10 CR3=000000000e208000 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=2033323a33343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8366a63c RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fd37b01 RSI=ffff88800fd37b20 RDI=ffff88800fd37b20 RBP=ffff88800fd377a0 RSP=ffff88800fd376d0 R8 =ffffffff86138716 R9 =ffff88800fd37788 R10=0000000000038001 R11=0000000000020c57 R12=ffff88800fd377a8 R13=ffff88800fd37790 R14=ffff88800fd37b28 R15=ffff88800fd37748 RIP=ffffffff8112fbf3 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 00007f20f1459900 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=00007ffca39e9000 CR3=000000000e2c6000 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=6720646572637465733a4d41503d706f 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