syzkaller login: [ 33.790836] BUG: Bad rss-counter state mm:00000000ac77ed20 type:MM_FILEPAGES val:33 [ 33.791834] BUG: Bad rss-counter state mm:00000000ac77ed20 type:MM_ANONPAGES val:22 [ 33.955174] ================================================================== [ 33.956250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.957496] Read of size 8 at addr ffff888009fbd310 by task sshd/220 [ 33.958333] [ 33.958550] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.959407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.960382] Call Trace: [ 33.960702] [ 33.960995] dump_stack_lvl+0x91/0xf0 [ 33.961478] print_report+0xcc/0x620 [ 33.961958] ? __virt_addr_valid+0x102/0x340 [ 33.962513] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.963128] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.963739] kasan_report+0xbe/0xf0 [ 33.964213] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.964836] vma_interval_tree_remove+0xc75/0xec0 [ 33.965451] vma_prepare+0xc54/0x11a0 [ 33.965931] __split_vma+0x5af/0x950 [ 33.966413] ? __pfx___split_vma+0x10/0x10 [ 33.966943] ? find_held_lock+0x2c/0x110 [ 33.967464] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.968040] ? lock_is_held_type+0x9f/0x120 [ 33.968582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.969220] ? mtree_range_walk+0x632/0x900 [ 33.969773] ? mas_walk+0x5c7/0x7c0 [ 33.970244] do_vmi_munmap+0x1f1/0x2b0 [ 33.970747] mmap_region+0x1f9/0x2660 [ 33.971229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.971739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.972452] ? __pfx_lock_acquire+0x10/0x10 [ 33.973001] ? __pfx_mmap_region+0x10/0x10 [ 33.973535] ? security_mmap_addr+0x7d/0xa0 [ 33.974069] ? get_unmapped_area+0x1f5/0x3f0 [ 33.974617] do_mmap+0x854/0xf00 [ 33.975056] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.975550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.976118] ksys_mmap_pgoff+0x3af/0x500 [ 33.976634] do_syscall_64+0x3f/0x90 [ 33.977135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.977787] RIP: 0033:0x7f61f1977d82 [ 33.978243] 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 [ 33.980389] RSP: 002b:00007fff4bfaba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.981316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61f1977d82 [ 33.982180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61f0db1000 [ 33.983027] RBP: 00007f61f0db1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.983865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aba63c8f70 [ 33.984710] R13: 00007fff4bfabab0 R14: 00007fff4bfabae0 R15: 00007fff4bfabe40 [ 33.985592] [ 33.985889] [ 33.986101] Allocated by task 213: [ 33.986525] kasan_save_stack+0x22/0x50 [ 33.987040] kasan_set_track+0x25/0x30 [ 33.987533] __kasan_slab_alloc+0x59/0x70 [ 33.988071] kmem_cache_alloc+0x16b/0x370 [ 33.988582] vm_area_dup+0x20/0x160 [ 33.989043] __split_vma+0x170/0x950 [ 33.989503] split_vma+0xc6/0x110 [ 33.989950] mprotect_fixup+0x8d2/0xb30 [ 33.990456] do_mprotect_pkey+0x87e/0xd40 [ 33.990971] __x64_sys_mprotect+0x78/0xc0 [ 33.991495] do_syscall_64+0x3f/0x90 [ 33.991966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.992600] [ 33.992817] Freed by task 213: [ 33.993217] kasan_save_stack+0x22/0x50 [ 33.993722] kasan_set_track+0x25/0x30 [ 33.994220] kasan_save_free_info+0x2b/0x50 [ 33.994755] __kasan_slab_free+0x10a/0x190 [ 33.995298] kmem_cache_free+0x10d/0x4d0 [ 33.995812] rcu_core+0x8c8/0x2860 [ 33.996253] __do_softirq+0x1b7/0x7d4 [ 33.996725] [ 33.996954] Last potentially related work creation: [ 33.997534] kasan_save_stack+0x22/0x50 [ 33.998037] __kasan_record_aux_stack+0x8e/0xa0 [ 33.998607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.999249] remove_vma+0x139/0x170 [ 33.999698] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.000264] do_vmi_munmap+0x1f1/0x2b0 [ 34.000744] __vm_munmap+0x138/0x3a0 [ 34.001224] __x64_sys_munmap+0x59/0x80 [ 34.001716] do_syscall_64+0x3f/0x90 [ 34.002196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.002841] [ 34.003053] Second to last potentially related work creation: [ 34.003734] kasan_save_stack+0x22/0x50 [ 34.004234] __kasan_record_aux_stack+0x8e/0xa0 [ 34.004811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.005471] remove_vma+0x139/0x170 [ 34.005919] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.006474] do_vmi_munmap+0x1f1/0x2b0 [ 34.006965] mmap_region+0x1f9/0x2660 [ 34.007436] do_mmap+0x854/0xf00 [ 34.007876] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.008359] ksys_mmap_pgoff+0x7d/0x500 [ 34.008845] do_syscall_64+0x3f/0x90 [ 34.009329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.009973] [ 34.010189] The buggy address belongs to the object at ffff888009fbd2b8 [ 34.010189] which belongs to the cache vm_area_struct of size 168 [ 34.011647] The buggy address is located 88 bytes inside of [ 34.011647] freed 168-byte region [ffff888009fbd2b8, ffff888009fbd360) [ 34.013056] [ 34.013270] The buggy address belongs to the physical page: [ 34.013926] page:000000003b3258d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9fbd [ 34.015001] memcg:ffff88800da62701 [ 34.015428] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.016069] page_type: 0xffffffff() [ 34.016520] raw: 0100000000000200 ffff88800879fc80 ffffea000036bf40 dead000000000008 [ 34.017463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da62701 [ 34.018372] page dumped because: kasan: bad access detected [ 34.019039] [ 34.019253] Memory state around the buggy address: [ 34.019834] ffff888009fbd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.020698] ffff888009fbd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.021565] >ffff888009fbd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.022417] ^ [ 34.022882] ffff888009fbd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.023740] ffff888009fbd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.024587] ================================================================== [ 34.025576] Disabling lock debugging due to kernel taint [ 36.810160] BUG: Bad rss-counter state mm:00000000449bfa6e type:MM_FILEPAGES val:33 [ 36.811134] BUG: Bad rss-counter state mm:00000000449bfa6e type:MM_ANONPAGES val:22 [ 37.286936] BUG: Bad rss-counter state mm:00000000a607c4b9 type:MM_FILEPAGES val:33 [ 37.287948] BUG: Bad rss-counter state mm:00000000a607c4b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16595' (ECDSA) to the list of known hosts. 2023/06/20 05:37:01 fuzzer started 2023/06/20 05:37:01 dialing manager at localhost:44161 2023/06/20 05:37:01 checking machine... 2023/06/20 05:37:01 checking revisions... [ 37.928337] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:37:01 testing simple program... [ 37.972509] cgroup: Unknown subsys name 'net' [ 38.028423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:58 Registers: info registers vcpu 0 RAX=ffffffff8387435a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003383ee7 RSI=ffffffff8387435a RDI=ffff888019c1f7a8 RBP=ffff888019c1f778 RSP=ffff888019c1f6d8 R8 =0000000000000001 R9 =ffff888019c1f720 R10=0000000000038001 R11=000000000008b93b R12=ffff888019c1f7a8 R13=0000000000000000 R14=ffff888015bb1b40 R15=0000000000000000 RIP=ffffffff84532440 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 00007fb7bcd4e900 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=00007ffc50917000 CR3=000000001033a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e13b1 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09d78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff812d923f RFL=00000247 [---Z-PC] 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 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=00007fac18aa6d90 CR3=000000000da6a000 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=2030303a37333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a37333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000