syzkaller login: [ 28.852671] BUG: Bad rss-counter state mm:00000000ee0c4a13 type:MM_FILEPAGES val:33 [ 28.853677] BUG: Bad rss-counter state mm:00000000ee0c4a13 type:MM_ANONPAGES val:22 [ 28.894180] ================================================================== [ 28.895394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.896724] Read of size 8 at addr ffff888016ba4ed8 by task sshd/220 [ 28.897696] [ 28.897999] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.899099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.900083] Call Trace: [ 28.900401] [ 28.900690] dump_stack_lvl+0x91/0xf0 [ 28.901179] print_report+0xcc/0x620 [ 28.901665] ? __virt_addr_valid+0x102/0x340 [ 28.902231] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902841] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.903471] kasan_report+0xbe/0xf0 [ 28.903968] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904624] vma_interval_tree_remove+0xc75/0xec0 [ 28.905259] vma_prepare+0xc54/0x11a0 [ 28.905752] __split_vma+0x5af/0x950 [ 28.906241] ? __pfx___split_vma+0x10/0x10 [ 28.906789] ? find_held_lock+0x2c/0x110 [ 28.907329] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.907916] ? lock_is_held_type+0x9f/0x120 [ 28.908472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.909128] ? mtree_range_walk+0x632/0x900 [ 28.909697] ? mas_walk+0x5c7/0x7c0 [ 28.910189] do_vmi_munmap+0x1f1/0x2b0 [ 28.910695] mmap_region+0x1f9/0x2660 [ 28.911197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.911726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.912459] ? __pfx_lock_acquire+0x10/0x10 [ 28.913024] ? __pfx_mmap_region+0x10/0x10 [ 28.913571] ? security_mmap_addr+0x7d/0xa0 [ 28.914122] ? get_unmapped_area+0x1f5/0x3f0 [ 28.914698] do_mmap+0x854/0xf00 [ 28.915152] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.915667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.916251] ksys_mmap_pgoff+0x3af/0x500 [ 28.916796] do_syscall_64+0x3f/0x90 [ 28.917297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917962] RIP: 0033:0x7fc04a37cd82 [ 28.918430] 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 [ 28.920629] RSP: 002b:00007ffed5eb4018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.921579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc04a37cd82 [ 28.922451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0497b6000 [ 28.923337] RBP: 00007fc0497b6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.924221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a249e5b20 [ 28.925102] R13: 00007ffed5eb4030 R14: 00007ffed5eb4060 R15: 00007ffed5eb43c0 [ 28.925986] [ 28.926286] [ 28.926506] Allocated by task 213: [ 28.926947] kasan_save_stack+0x22/0x50 [ 28.927469] kasan_set_track+0x25/0x30 [ 28.927987] __kasan_slab_alloc+0x59/0x70 [ 28.928526] kmem_cache_alloc+0x16b/0x370 [ 28.929080] vm_area_dup+0x20/0x160 [ 28.929552] __split_vma+0x170/0x950 [ 28.930033] split_vma+0xc6/0x110 [ 28.930484] mprotect_fixup+0x8d2/0xb30 [ 28.931005] do_mprotect_pkey+0x87e/0xd40 [ 28.931540] __x64_sys_mprotect+0x78/0xc0 [ 28.932089] do_syscall_64+0x3f/0x90 [ 28.932584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.933258] [ 28.933481] Freed by task 213: [ 28.933886] kasan_save_stack+0x22/0x50 [ 28.934406] kasan_set_track+0x25/0x30 [ 28.934918] kasan_save_free_info+0x2b/0x50 [ 28.935461] __kasan_slab_free+0x10a/0x190 [ 28.936005] kmem_cache_free+0x10d/0x4d0 [ 28.936529] rcu_core+0x8c8/0x2860 [ 28.936994] __do_softirq+0x1b7/0x7d4 [ 28.937486] [ 28.937705] Last potentially related work creation: [ 28.938305] kasan_save_stack+0x22/0x50 [ 28.938825] __kasan_record_aux_stack+0x8e/0xa0 [ 28.939499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.940157] remove_vma+0x139/0x170 [ 28.940620] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.941208] do_vmi_munmap+0x1f1/0x2b0 [ 28.941707] __vm_munmap+0x138/0x3a0 [ 28.942185] __x64_sys_munmap+0x59/0x80 [ 28.942700] do_syscall_64+0x3f/0x90 [ 28.943189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.943849] [ 28.944070] The buggy address belongs to the object at ffff888016ba4e80 [ 28.944070] which belongs to the cache vm_area_struct of size 168 [ 28.945596] The buggy address is located 88 bytes inside of [ 28.945596] freed 168-byte region [ffff888016ba4e80, ffff888016ba4f28) [ 28.947048] [ 28.947269] The buggy address belongs to the physical page: [ 28.947951] page:00000000d9a2b358 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ba4 [ 28.949093] memcg:ffff88800e93b701 [ 28.949532] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.950205] page_type: 0xffffffff() [ 28.950668] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.951614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e93b701 [ 28.952547] page dumped because: kasan: bad access detected [ 28.953244] [ 28.953464] Memory state around the buggy address: [ 28.954067] ffff888016ba4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.954955] ffff888016ba4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.955842] >ffff888016ba4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.956740] ^ [ 28.957485] ffff888016ba4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.958374] ffff888016ba4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.959248] ================================================================== [ 28.960203] Disabling lock debugging due to kernel taint [ 30.942758] BUG: Bad rss-counter state mm:00000000a5f108ab type:MM_FILEPAGES val:33 [ 30.943922] BUG: Bad rss-counter state mm:00000000a5f108ab type:MM_ANONPAGES val:22 [ 31.349747] BUG: Bad rss-counter state mm:00000000fece474d type:MM_FILEPAGES val:33 [ 31.350770] BUG: Bad rss-counter state mm:00000000fece474d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51540' (ECDSA) to the list of known hosts. 2023/06/21 02:47:41 fuzzer started 2023/06/21 02:47:41 dialing manager at localhost:36067 2023/06/21 02:47:41 checking machine... 2023/06/21 02:47:41 checking revisions... [ 32.121336] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:47:42 testing simple program... [ 32.162918] cgroup: Unknown subsys name 'net' [ 32.208286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:41 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=0000000000000000 RCX=ffffffff813faed0 RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffffff85407d68 RSP=ffff88806ce09df0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=000000158b0af784 R12=0000000000000000 R13=ffff88806ce2c240 R14=ffffffff85407d68 R15=dffffc0000000000 RIP=ffffffff813bced4 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 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=00007fe4e951d650 CR3=000000000e2e4000 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=37343a3230203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031343a3734 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff81efd036 RDX=ffff888016333680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880162f7918 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000080000 R13=0000000000000019 R14=0000000000000001 R15=ffff8880162f79a0 RIP=ffffffff814c086b 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 00007fe4e8f68900 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=00007ff2e794b000 CR3=000000000e1f2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000