syzkaller login: [ 28.778086] BUG: Bad rss-counter state mm:0000000080373450 type:MM_FILEPAGES val:33 [ 28.779620] BUG: Bad rss-counter state mm:0000000080373450 type:MM_ANONPAGES val:22 [ 28.929329] ================================================================== [ 28.930254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.931186] Read of size 8 at addr ffff8880197dded8 by task sshd/220 [ 28.931959] [ 28.932177] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.933211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.934198] Call Trace: [ 28.934517] [ 28.934921] dump_stack_lvl+0x91/0xf0 [ 28.935514] print_report+0xcc/0x620 [ 28.936079] ? __virt_addr_valid+0x102/0x340 [ 28.936739] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.937472] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.938201] kasan_report+0xbe/0xf0 [ 28.938768] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.939499] vma_interval_tree_remove+0xc75/0xec0 [ 28.940245] vma_prepare+0xc54/0x11a0 [ 28.940862] __split_vma+0x5af/0x950 [ 28.941443] ? __pfx___split_vma+0x10/0x10 [ 28.942096] ? find_held_lock+0x2c/0x110 [ 28.942745] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.943426] ? lock_is_held_type+0x9f/0x120 [ 28.944074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.944827] ? mtree_range_walk+0x632/0x900 [ 28.945472] ? mas_walk+0x5c7/0x7c0 [ 28.945958] do_vmi_munmap+0x1f1/0x2b0 [ 28.946476] mmap_region+0x1f9/0x2660 [ 28.946960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.947470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.948179] ? __pfx_lock_acquire+0x10/0x10 [ 28.948718] ? __pfx_mmap_region+0x10/0x10 [ 28.949252] ? security_mmap_addr+0x7d/0xa0 [ 28.949790] ? get_unmapped_area+0x1f5/0x3f0 [ 28.950355] do_mmap+0x854/0xf00 [ 28.950801] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.951302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.951860] ksys_mmap_pgoff+0x3af/0x500 [ 28.952395] do_syscall_64+0x3f/0x90 [ 28.952888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.953540] RIP: 0033:0x7f34aea7bd82 [ 28.953999] 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 [ 28.956124] RSP: 002b:00007fff83dc62d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.957059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34aea7bd82 [ 28.957915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34adeb5000 [ 28.958759] RBP: 00007f34adeb5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.959611] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f825afd90 [ 28.960462] R13: 00007fff83dc62f0 R14: 00007fff83dc6320 R15: 00007fff83dc6680 [ 28.961340] [ 28.961645] [ 28.961866] Allocated by task 212: [ 28.962293] kasan_save_stack+0x22/0x50 [ 28.962793] kasan_set_track+0x25/0x30 [ 28.963280] __kasan_slab_alloc+0x59/0x70 [ 28.963796] kmem_cache_alloc+0x16b/0x370 [ 28.964310] vm_area_dup+0x20/0x160 [ 28.964775] __split_vma+0x170/0x950 [ 28.965234] split_vma+0xc6/0x110 [ 28.965674] mprotect_fixup+0x8d2/0xb30 [ 28.966172] do_mprotect_pkey+0x87e/0xd40 [ 28.966692] __x64_sys_mprotect+0x78/0xc0 [ 28.967206] do_syscall_64+0x3f/0x90 [ 28.967673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.968318] [ 28.968555] Freed by task 212: [ 28.968943] kasan_save_stack+0x22/0x50 [ 28.969444] kasan_set_track+0x25/0x30 [ 28.969935] kasan_save_free_info+0x2b/0x50 [ 28.970476] __kasan_slab_free+0x10a/0x190 [ 28.971013] kmem_cache_free+0x10d/0x4d0 [ 28.971529] rcu_core+0x8c8/0x2860 [ 28.971993] __do_softirq+0x1b7/0x7d4 [ 28.972467] [ 28.972694] Last potentially related work creation: [ 28.973284] kasan_save_stack+0x22/0x50 [ 28.973791] __kasan_record_aux_stack+0x8e/0xa0 [ 28.974373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.975028] remove_vma+0x139/0x170 [ 28.975485] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.976041] do_vmi_munmap+0x1f1/0x2b0 [ 28.976535] __vm_munmap+0x138/0x3a0 [ 28.977004] __x64_sys_munmap+0x59/0x80 [ 28.977513] do_syscall_64+0x3f/0x90 [ 28.977995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.978638] [ 28.978853] The buggy address belongs to the object at ffff8880197dde80 [ 28.978853] which belongs to the cache vm_area_struct of size 168 [ 28.980325] The buggy address is located 88 bytes inside of [ 28.980325] freed 168-byte region [ffff8880197dde80, ffff8880197ddf28) [ 28.981742] [ 28.981956] The buggy address belongs to the physical page: [ 28.982613] page:00000000aa6f52a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197dd [ 28.983710] memcg:ffff88801877dd01 [ 28.984139] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.984789] page_type: 0xffffffff() [ 28.985241] raw: 0100000000000200 ffff8880087a0c80 ffffea000065f6c0 0000000000000004 [ 28.986171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801877dd01 [ 28.987124] page dumped because: kasan: bad access detected [ 28.987781] [ 28.987994] Memory state around the buggy address: [ 28.988597] ffff8880197ddd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.989449] ffff8880197dde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.990316] >ffff8880197dde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.991160] ^ [ 28.991891] ffff8880197ddf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.992751] ffff8880197ddf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.993630] ================================================================== [ 28.994935] Disabling lock debugging due to kernel taint [ 31.431718] BUG: Bad rss-counter state mm:00000000afb20adf type:MM_FILEPAGES val:33 [ 31.432915] BUG: Bad rss-counter state mm:00000000afb20adf type:MM_ANONPAGES val:22 [ 31.990219] BUG: Bad rss-counter state mm:00000000dd81dd90 type:MM_FILEPAGES val:33 [ 31.991613] BUG: Bad rss-counter state mm:00000000dd81dd90 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44141' (ECDSA) to the list of known hosts. 2023/06/21 02:52:43 fuzzer started 2023/06/21 02:52:43 dialing manager at localhost:36067 2023/06/21 02:52:43 checking machine... 2023/06/21 02:52:43 checking revisions... [ 32.659536] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:52:43 testing simple program... [ 32.711466] cgroup: Unknown subsys name 'net' [ 32.780208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:43 Registers: info registers vcpu 0 RAX=0000000001e50a77 RBX=000055799fc4c360 RCX=00000000000c04b7 RDX=0000000000000000 RSI=0000000001d905c0 RDI=431bde82d7b634db RBP=0000000000000001 RSP=00007fff84832348 R8 =000000000000001f R9 =00007fff8492c080 R10=00007fff8492c090 R11=000000000000d628 R12=000055799fc4c4a8 R13=0000000000000014 R14=0000000000000000 R15=0000000000000000 RIP=00007f6249898780 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6248d90900 00000000 00000000 GS =0000 0000000000000000 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=00007f62481e1530 CR3=000000000d5f6000 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=00000000000000000000000000000000 XMM01=915de10770916ca68f4ef6453216d590 XMM02=eff9b2d0a8fce9cb000000000011ab90 XMM03=2c67c8bc2e329bc3000000000011acb8 XMM04=1cb2e80f8fccbaa700000000000ae988 XMM05=226ad40c1e5f93e80000000000132c28 XMM06=4fda316b135da52b0000000000131a18 XMM07=fb795ef6d65770560000000000121600 XMM08=2c67c8bc2e329bc3000000000011acb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c390e6 RBX=0000000000000001 RCX=ffffffff861c8730 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015bff9d0 RSP=ffff888015bff908 R8 =ffffffff861c8734 R9 =ffff888015bff9b8 R10=0000000000038001 R11=0000000000038c51 R12=ffff888015bff9d8 R13=ffff888015bff9c0 R14=ffff888015bffd58 R15=ffff888015bff978 RIP=ffffffff81130b73 RFL=00000212 [----A--] 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 00007f60b2aca900 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=00007fff0b337000 CR3=000000000c930000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000