syzkaller login: [ 43.948872] BUG: Bad rss-counter state mm:000000006c1435e5 type:MM_FILEPAGES val:33 [ 43.949788] BUG: Bad rss-counter state mm:000000006c1435e5 type:MM_ANONPAGES val:22 [ 44.102465] ================================================================== [ 44.103587] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.104545] Read of size 8 at addr ffff88800ecc9c20 by task sshd/226 [ 44.105528] [ 44.105750] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.106615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.107625] Call Trace: [ 44.107956] [ 44.108246] dump_stack_lvl+0x91/0xf0 [ 44.108742] print_report+0xcc/0x620 [ 44.109229] ? __virt_addr_valid+0x102/0x340 [ 44.109788] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.110396] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.111027] kasan_report+0xbe/0xf0 [ 44.111503] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.112125] vma_interval_tree_remove+0xc75/0xec0 [ 44.112728] vma_prepare+0xc54/0x11a0 [ 44.113207] __split_vma+0x5af/0x950 [ 44.113681] ? __pfx___split_vma+0x10/0x10 [ 44.114209] ? find_held_lock+0x2c/0x110 [ 44.114724] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.115310] ? lock_is_held_type+0x9f/0x120 [ 44.115843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.116448] ? mtree_range_walk+0x632/0x900 [ 44.116999] ? mas_walk+0x5c7/0x7c0 [ 44.117469] do_vmi_munmap+0x1f1/0x2b0 [ 44.117962] mmap_region+0x1f9/0x2660 [ 44.118447] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.118973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.119687] ? __pfx_lock_acquire+0x10/0x10 [ 44.120218] ? __pfx_mmap_region+0x10/0x10 [ 44.120742] ? security_mmap_addr+0x7d/0xa0 [ 44.121273] ? get_unmapped_area+0x1f5/0x3f0 [ 44.121827] do_mmap+0x854/0xf00 [ 44.122262] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.122762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.123345] ksys_mmap_pgoff+0x3af/0x500 [ 44.123849] do_syscall_64+0x3f/0x90 [ 44.124321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.124974] RIP: 0033:0x7feb9332dd82 [ 44.125428] 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 [ 44.127567] RSP: 002b:00007ffce664b578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.128481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb9332dd82 [ 44.129335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb92767000 [ 44.130190] RBP: 00007feb92767000 R08: 0000000000000009 R09: 0000000000001000 [ 44.131061] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b820f8fec0 [ 44.131907] R13: 00007ffce664b590 R14: 00007ffce664b5c0 R15: 00007ffce664b920 [ 44.132767] [ 44.133057] [ 44.133275] Allocated by task 219: [ 44.133699] kasan_save_stack+0x22/0x50 [ 44.134214] kasan_set_track+0x25/0x30 [ 44.134715] __kasan_slab_alloc+0x59/0x70 [ 44.135262] kmem_cache_alloc+0x16b/0x370 [ 44.135796] vm_area_dup+0x20/0x160 [ 44.136256] __split_vma+0x170/0x950 [ 44.136718] split_vma+0xc6/0x110 [ 44.137167] mprotect_fixup+0x8d2/0xb30 [ 44.137676] do_mprotect_pkey+0x87e/0xd40 [ 44.138203] __x64_sys_mprotect+0x78/0xc0 [ 44.138730] do_syscall_64+0x3f/0x90 [ 44.139213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.139861] [ 44.140079] Freed by task 219: [ 44.140470] kasan_save_stack+0x22/0x50 [ 44.140976] kasan_set_track+0x25/0x30 [ 44.141465] kasan_save_free_info+0x2b/0x50 [ 44.142000] __kasan_slab_free+0x10a/0x190 [ 44.142538] kmem_cache_free+0x10d/0x4d0 [ 44.143061] rcu_core+0x8c8/0x2860 [ 44.143502] __do_softirq+0x1b7/0x7d4 [ 44.143978] [ 44.144192] Last potentially related work creation: [ 44.144805] kasan_save_stack+0x22/0x50 [ 44.145312] __kasan_record_aux_stack+0x8e/0xa0 [ 44.145890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.146616] remove_vma+0x139/0x170 [ 44.147079] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.147637] do_vmi_munmap+0x1f1/0x2b0 [ 44.148132] __vm_munmap+0x138/0x3a0 [ 44.148595] __x64_sys_munmap+0x59/0x80 [ 44.149095] do_syscall_64+0x3f/0x90 [ 44.149564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.150207] [ 44.150423] The buggy address belongs to the object at ffff88800ecc9bc8 [ 44.150423] which belongs to the cache vm_area_struct of size 168 [ 44.151901] The buggy address is located 88 bytes inside of [ 44.151901] freed 168-byte region [ffff88800ecc9bc8, ffff88800ecc9c70) [ 44.153302] [ 44.153524] The buggy address belongs to the physical page: [ 44.154194] page:00000000036b6107 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecc9 [ 44.155308] memcg:ffff8880095d7601 [ 44.155738] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.156389] page_type: 0xffffffff() [ 44.156843] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.157761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095d7601 [ 44.158671] page dumped because: kasan: bad access detected [ 44.159333] [ 44.159547] Memory state around the buggy address: [ 44.160135] ffff88800ecc9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.160985] ffff88800ecc9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.161835] >ffff88800ecc9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.162692] ^ [ 44.163241] ffff88800ecc9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.164092] ffff88800ecc9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.164939] ================================================================== [ 44.165894] Disabling lock debugging due to kernel taint [ 46.193584] BUG: Bad rss-counter state mm:000000005cdfa9f8 type:MM_FILEPAGES val:33 [ 46.194639] BUG: Bad rss-counter state mm:000000005cdfa9f8 type:MM_ANONPAGES val:22 [ 46.742440] BUG: Bad rss-counter state mm:000000004b4893d3 type:MM_FILEPAGES val:33 [ 46.743703] BUG: Bad rss-counter state mm:000000004b4893d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63489' (ECDSA) to the list of known hosts. 2023/06/20 01:56:00 fuzzer started 2023/06/20 01:56:01 dialing manager at localhost:44161 2023/06/20 01:56:01 checking machine... 2023/06/20 01:56:01 checking revisions... [ 47.402351] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:56:01 testing simple program... [ 47.446687] cgroup: Unknown subsys name 'net' [ 47.490931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dbe9b40 RSI=ffffffff8216958a RDI=0000000000000007 RBP=00007faf17bfd7a0 RSP=ffff888016defb28 R8 =0000000000000007 R9 =0000000000000000 R10=00007faf17bfd7a0 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=ffff888016defcd8 R15=ffff888016defe70 RIP=ffffffff8216958d RFL=00040293 [--S-A-C] 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 00007faf17c01700 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=00007f9e643de770 CR3=000000000e748000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363731 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=ffffffff81740f91 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100391ce36 RSI=ffff88801c8e7da0 RDI=ffffffff81740f91 RBP=ffff88801c8e71f0 RSP=ffff88801c8e7158 R8 =0000000000000001 R9 =ffff88801c8e7198 R10=0000000000038001 R11=000000000001e41e R12=ffff88801c8e7220 R13=0000000000000000 R14=ffff88800f9eb680 R15=ffff88800e806720 RIP=ffffffff810bd06d 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 00007f8621b7f900 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=00007f8621b5e020 CR3=0000000015998000 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