syzkaller login: [ 38.703626] BUG: Bad rss-counter state mm:00000000959a96ab type:MM_FILEPAGES val:33 [ 38.704519] BUG: Bad rss-counter state mm:00000000959a96ab type:MM_ANONPAGES val:22 [ 38.873374] ================================================================== [ 38.874782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876449] Read of size 8 at addr ffff88801a1c06b0 by task sshd/220 [ 38.877939] [ 38.878342] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881620] Call Trace: [ 38.882079] [ 38.882452] dump_stack_lvl+0x91/0xf0 [ 38.883241] print_report+0xcc/0x620 [ 38.883826] ? __virt_addr_valid+0x102/0x340 [ 38.884443] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885134] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885862] kasan_report+0xbe/0xf0 [ 38.886393] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887091] vma_interval_tree_remove+0xc75/0xec0 [ 38.887779] vma_prepare+0xc54/0x11a0 [ 38.888307] __split_vma+0x5af/0x950 [ 38.888839] ? __pfx___split_vma+0x10/0x10 [ 38.889447] ? find_held_lock+0x2c/0x110 [ 38.890052] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890700] ? lock_is_held_type+0x9f/0x120 [ 38.891294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.891985] ? mtree_range_walk+0x632/0x900 [ 38.892607] ? mas_walk+0x5c7/0x7c0 [ 38.893130] do_vmi_munmap+0x1f1/0x2b0 [ 38.893723] mmap_region+0x1f9/0x2660 [ 38.894263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.894858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.895663] ? __pfx_lock_acquire+0x10/0x10 [ 38.896244] ? __pfx_mmap_region+0x10/0x10 [ 38.896845] ? security_mmap_addr+0x7d/0xa0 [ 38.897445] ? get_unmapped_area+0x1f5/0x3f0 [ 38.898079] do_mmap+0x854/0xf00 [ 38.898585] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.899132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.899772] ksys_mmap_pgoff+0x3af/0x500 [ 38.900325] do_syscall_64+0x3f/0x90 [ 38.900870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901602] RIP: 0033:0x7f481eb57d82 [ 38.902108] 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 [ 38.904449] RSP: 002b:00007fff4d10b568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f481eb57d82 [ 38.906397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f481df91000 [ 38.907328] RBP: 00007f481df91000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908280] R10: 0000000000000812 R11: 0000000000000206 R12: 000056426b45cec0 [ 38.909222] R13: 00007fff4d10b580 R14: 00007fff4d10b5b0 R15: 00007fff4d10b910 [ 38.910184] [ 38.910509] [ 38.910760] Allocated by task 213: [ 38.911226] kasan_save_stack+0x22/0x50 [ 38.911796] kasan_set_track+0x25/0x30 [ 38.912336] __kasan_slab_alloc+0x59/0x70 [ 38.912943] kmem_cache_alloc+0x16b/0x370 [ 38.913522] vm_area_dup+0x20/0x160 [ 38.914028] __split_vma+0x170/0x950 [ 38.914543] split_vma+0xc6/0x110 [ 38.915027] mprotect_fixup+0x8d2/0xb30 [ 38.915600] do_mprotect_pkey+0x87e/0xd40 [ 38.916167] __x64_sys_mprotect+0x78/0xc0 [ 38.916749] do_syscall_64+0x3f/0x90 [ 38.917301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918041] [ 38.918279] Freed by task 13: [ 38.918713] kasan_save_stack+0x22/0x50 [ 38.919262] kasan_set_track+0x25/0x30 [ 38.919827] kasan_save_free_info+0x2b/0x50 [ 38.920410] __kasan_slab_free+0x10a/0x190 [ 38.921011] kmem_cache_free+0x10d/0x4d0 [ 38.921606] rcu_core+0x8c8/0x2860 [ 38.922090] __do_softirq+0x1b7/0x7d4 [ 38.922644] [ 38.922882] Last potentially related work creation: [ 38.923522] kasan_save_stack+0x22/0x50 [ 38.924085] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925462] remove_vma+0x139/0x170 [ 38.925965] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926580] do_vmi_munmap+0x1f1/0x2b0 [ 38.927105] __vm_munmap+0x138/0x3a0 [ 38.927637] __x64_sys_munmap+0x59/0x80 [ 38.928174] do_syscall_64+0x3f/0x90 [ 38.928703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929424] [ 38.929675] The buggy address belongs to the object at ffff88801a1c0658 [ 38.929675] which belongs to the cache vm_area_struct of size 168 [ 38.931265] The buggy address is located 88 bytes inside of [ 38.931265] freed 168-byte region [ffff88801a1c0658, ffff88801a1c0700) [ 38.932801] [ 38.933037] The buggy address belongs to the physical page: [ 38.933780] page:00000000c4bbd6a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1c0 [ 38.934967] memcg:ffff88800d944801 [ 38.935425] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936153] page_type: 0xffffffff() [ 38.936666] raw: 0100000000000200 ffff8880087a0c80 ffffea000058f840 dead000000000004 [ 38.937741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d944801 [ 38.938860] page dumped because: kasan: bad access detected [ 38.939666] [ 38.939919] Memory state around the buggy address: [ 38.940650] ffff88801a1c0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.941710] ffff88801a1c0600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.942753] >ffff88801a1c0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.943801] ^ [ 38.944492] ffff88801a1c0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.945583] ffff88801a1c0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.946604] ================================================================== [ 38.947976] Disabling lock debugging due to kernel taint [ 41.445602] BUG: Bad rss-counter state mm:00000000548add8e type:MM_FILEPAGES val:33 [ 41.446769] BUG: Bad rss-counter state mm:00000000548add8e type:MM_ANONPAGES val:22 [ 41.927881] BUG: Bad rss-counter state mm:00000000df71f4a1 type:MM_FILEPAGES val:33 [ 41.929076] BUG: Bad rss-counter state mm:00000000df71f4a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62771' (ECDSA) to the list of known hosts. 2023/06/21 05:02:41 fuzzer started 2023/06/21 05:02:41 dialing manager at localhost:36067 2023/06/21 05:02:41 checking machine... 2023/06/21 05:02:41 checking revisions... [ 42.622298] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:02:41 testing simple program... [ 42.654293] cgroup: Unknown subsys name 'net' [ 42.701791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:41 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888019f976e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000082 [--S----] 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 00007fc19558f700 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=00007fac69aff878 CR3=000000000cae8000 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=2030343a32303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a32303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100197fe36 RSI=ffffffff846000aa RDI=ffff88800cbff220 RBP=ffff88800cbff1f0 RSP=ffff88800cbff150 R8 =0000000000000001 R9 =ffff88800cbff198 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800cbff220 R13=0000000000000000 R14=ffff8880183251c0 R15=ffff88800d84ebe0 RIP=ffffffff813ad47e 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 00007f7613431900 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=00007f7613410020 CR3=0000000018034000 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