syzkaller login: [ 30.081917] BUG: Bad rss-counter state mm:00000000faaa07b1 type:MM_FILEPAGES val:33 [ 30.083237] BUG: Bad rss-counter state mm:00000000faaa07b1 type:MM_ANONPAGES val:22 [ 30.230504] ================================================================== [ 30.231442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.232380] Read of size 8 at addr ffff88800d9e9228 by task sshd/219 [ 30.233250] [ 30.233465] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.234321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.235320] Call Trace: [ 30.235636] <TASK> [ 30.235922] dump_stack_lvl+0x91/0xf0 [ 30.236434] print_report+0xcc/0x620 [ 30.236916] ? __virt_addr_valid+0x102/0x340 [ 30.237476] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238711] kasan_report+0xbe/0xf0 [ 30.239196] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239810] vma_interval_tree_remove+0xc75/0xec0 [ 30.240416] vma_prepare+0xc54/0x11a0 [ 30.240904] __split_vma+0x5af/0x950 [ 30.241376] ? __pfx___split_vma+0x10/0x10 [ 30.241913] ? find_held_lock+0x2c/0x110 [ 30.242427] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.243005] ? lock_is_held_type+0x9f/0x120 [ 30.243556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.244150] ? mtree_range_walk+0x632/0x900 [ 30.244713] ? mas_walk+0x5c7/0x7c0 [ 30.245193] do_vmi_munmap+0x1f1/0x2b0 [ 30.245698] mmap_region+0x1f9/0x2660 [ 30.246183] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.246692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.247424] ? __pfx_lock_acquire+0x10/0x10 [ 30.247958] ? __pfx_mmap_region+0x10/0x10 [ 30.248481] ? security_mmap_addr+0x7d/0xa0 [ 30.249019] ? get_unmapped_area+0x1f5/0x3f0 [ 30.249572] do_mmap+0x854/0xf00 [ 30.250010] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.250519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.251091] ksys_mmap_pgoff+0x3af/0x500 [ 30.251598] do_syscall_64+0x3f/0x90 [ 30.252090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252735] RIP: 0033:0x7f2fe16c0d82 [ 30.253196] 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 [ 30.255354] RSP: 002b:00007ffc7f1652a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.256260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2fe16c0d82 [ 30.257101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2fe0afa000 [ 30.257947] RBP: 00007f2fe0afa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.258792] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587f82f3ec0 [ 30.259647] R13: 00007ffc7f1652c0 R14: 00007ffc7f1652f0 R15: 00007ffc7f165650 [ 30.260506] </TASK> [ 30.260804] [ 30.261020] Allocated by task 212: [ 30.261449] kasan_save_stack+0x22/0x50 [ 30.261955] kasan_set_track+0x25/0x30 [ 30.262446] __kasan_slab_alloc+0x59/0x70 [ 30.262971] kmem_cache_alloc+0x16b/0x370 [ 30.263482] vm_area_dup+0x20/0x160 [ 30.263937] __split_vma+0x170/0x950 [ 30.264398] split_vma+0xc6/0x110 [ 30.264867] mprotect_fixup+0x8d2/0xb30 [ 30.265390] do_mprotect_pkey+0x87e/0xd40 [ 30.265922] __x64_sys_mprotect+0x78/0xc0 [ 30.266456] do_syscall_64+0x3f/0x90 [ 30.266932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267597] [ 30.267814] Freed by task 212: [ 30.268208] kasan_save_stack+0x22/0x50 [ 30.268712] kasan_set_track+0x25/0x30 [ 30.269208] kasan_save_free_info+0x2b/0x50 [ 30.269738] __kasan_slab_free+0x10a/0x190 [ 30.270283] kmem_cache_free+0x10d/0x4d0 [ 30.270810] rcu_core+0x8c8/0x2860 [ 30.271272] __do_softirq+0x1b7/0x7d4 [ 30.271765] [ 30.271982] Last potentially related work creation: [ 30.272573] kasan_save_stack+0x22/0x50 [ 30.273078] __kasan_record_aux_stack+0x8e/0xa0 [ 30.273661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274304] remove_vma+0x139/0x170 [ 30.274754] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.275330] do_vmi_munmap+0x1f1/0x2b0 [ 30.275821] __vm_munmap+0x138/0x3a0 [ 30.276286] __x64_sys_munmap+0x59/0x80 [ 30.276782] do_syscall_64+0x3f/0x90 [ 30.277255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.277896] [ 30.278111] The buggy address belongs to the object at ffff88800d9e91d0 [ 30.278111] which belongs to the cache vm_area_struct of size 168 [ 30.279580] The buggy address is located 88 bytes inside of [ 30.279580] freed 168-byte region [ffff88800d9e91d0, ffff88800d9e9278) [ 30.280973] [ 30.281189] The buggy address belongs to the physical page: [ 30.281837] page:000000009f399291 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9e9 [ 30.282913] memcg:ffff88801679a901 [ 30.283363] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.284032] page_type: 0xffffffff() [ 30.284487] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.285396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801679a901 [ 30.286305] page dumped because: kasan: bad access detected [ 30.286971] [ 30.287193] Memory state around the buggy address: [ 30.287766] ffff88800d9e9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.288618] ffff88800d9e9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.289464] >ffff88800d9e9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.290313] ^ [ 30.290866] ffff88800d9e9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.291719] ffff88800d9e9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.292582] ================================================================== [ 30.293669] Disabling lock debugging due to kernel taint [ 32.380137] BUG: Bad rss-counter state mm:00000000f0327ea5 type:MM_FILEPAGES val:33 [ 32.381127] BUG: Bad rss-counter state mm:00000000f0327ea5 type:MM_ANONPAGES val:22 [ 32.927815] BUG: Bad rss-counter state mm:000000002835e431 type:MM_FILEPAGES val:33 [ 32.928945] BUG: Bad rss-counter state mm:000000002835e431 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53191' (ECDSA) to the list of known hosts. 2023/06/21 01:30:24 fuzzer started 2023/06/21 01:30:25 dialing manager at localhost:36067 2023/06/21 01:30:25 checking machine... 2023/06/21 01:30:25 checking revisions... [ 33.565799] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:30:25 testing simple program... [ 33.619298] cgroup: Unknown subsys name 'net' [ 33.661782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:30:24 Registers: info registers vcpu 0 RAX=1ffffffff0a58f21 RBX=ffff88801619f540 RCX=0000000000000000 RDX=0000000000039500 RSI=0000000000039500 RDI=ffffffff852c7908 RBP=0000000000000001 RSP=ffff88801619f458 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008dcc180 R11=000000000001d600 R12=ffff88806ce286b8 R13=0000000000000001 R14=0000000000000000 R15=0000000000000075 RIP=ffffffff81269f34 RFL=00000046 [---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 00007f628150a700 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=00007f4a236fd2c0 CR3=00000000163d4000 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=2034323a30333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801430abc0 RCX=1ffffffff0ba7c92 RDX=1ffff110028c135e RSI=0000000000000008 RDI=ffff888014609ab0 RBP=ffff888014609ab0 RSP=ffff88806cf09e18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffff888014609af0 R14=ffffffff813782f8 R15=ffff88800c735c80 RIP=ffffffff81846821 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 00007f57c78f8900 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=00007ffcf6d1cff8 CR3=000000000efb8000 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