syzkaller login: [ 31.010852] BUG: Bad rss-counter state mm:0000000018d44584 type:MM_FILEPAGES val:33 [ 31.011808] BUG: Bad rss-counter state mm:0000000018d44584 type:MM_ANONPAGES val:22 [ 31.138249] ================================================================== [ 31.138941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.139663] Read of size 8 at addr ffff88801a3e6c20 by task sshd/222 [ 31.140255] [ 31.140420] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.141077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.141933] Call Trace: [ 31.142180] [ 31.142402] dump_stack_lvl+0x91/0xf0 [ 31.142786] print_report+0xcc/0x620 [ 31.143150] ? __virt_addr_valid+0x102/0x340 [ 31.143568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144541] kasan_report+0xbe/0xf0 [ 31.144872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145220] vma_interval_tree_remove+0xc75/0xec0 [ 31.145555] vma_prepare+0xc54/0x11a0 [ 31.145822] __split_vma+0x5af/0x950 [ 31.146085] ? __pfx___split_vma+0x10/0x10 [ 31.146379] ? find_held_lock+0x2c/0x110 [ 31.146672] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.146988] ? lock_is_held_type+0x9f/0x120 [ 31.147288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.147624] ? mtree_range_walk+0x632/0x900 [ 31.147938] ? mas_walk+0x5c7/0x7c0 [ 31.148204] do_vmi_munmap+0x1f1/0x2b0 [ 31.148477] mmap_region+0x1f9/0x2660 [ 31.148745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.149040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.149442] ? __pfx_lock_acquire+0x10/0x10 [ 31.149742] ? __pfx_mmap_region+0x10/0x10 [ 31.150039] ? security_mmap_addr+0x7d/0xa0 [ 31.150335] ? get_unmapped_area+0x1f5/0x3f0 [ 31.150640] do_mmap+0x854/0xf00 [ 31.150885] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.151160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151472] ksys_mmap_pgoff+0x3af/0x500 [ 31.151753] do_syscall_64+0x3f/0x90 [ 31.152023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152400] RIP: 0033:0x7fd12ca41d82 [ 31.152655] 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 [ 31.153853] RSP: 002b:00007fffefa76aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.154362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd12ca41d82 [ 31.154838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd12be7b000 [ 31.155316] RBP: 00007fd12be7b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.155793] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8c7ccfec0 [ 31.156263] R13: 00007fffefa76ac0 R14: 00007fffefa76af0 R15: 00007fffefa76e50 [ 31.156740] [ 31.156914] [ 31.157034] Allocated by task 213: [ 31.157278] kasan_save_stack+0x22/0x50 [ 31.157559] kasan_set_track+0x25/0x30 [ 31.157838] __kasan_slab_alloc+0x59/0x70 [ 31.158130] kmem_cache_alloc+0x16b/0x370 [ 31.158415] vm_area_dup+0x20/0x160 [ 31.158670] __split_vma+0x170/0x950 [ 31.158932] split_vma+0xc6/0x110 [ 31.159175] mprotect_fixup+0x8d2/0xb30 [ 31.159454] do_mprotect_pkey+0x87e/0xd40 [ 31.159744] __x64_sys_mprotect+0x78/0xc0 [ 31.160037] do_syscall_64+0x3f/0x90 [ 31.160298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160657] [ 31.160776] Freed by task 13: [ 31.160999] kasan_save_stack+0x22/0x50 [ 31.161279] kasan_set_track+0x25/0x30 [ 31.161553] kasan_save_free_info+0x2b/0x50 [ 31.161854] __kasan_slab_free+0x10a/0x190 [ 31.162151] kmem_cache_free+0x10d/0x4d0 [ 31.162437] rcu_core+0x8c8/0x2860 [ 31.162688] __do_softirq+0x1b7/0x7d4 [ 31.162956] [ 31.163075] Last potentially related work creation: [ 31.163400] kasan_save_stack+0x22/0x50 [ 31.163681] __kasan_record_aux_stack+0x8e/0xa0 [ 31.163999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.164357] remove_vma+0x139/0x170 [ 31.164608] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.164928] do_vmi_munmap+0x1f1/0x2b0 [ 31.165197] __vm_munmap+0x138/0x3a0 [ 31.165455] __x64_sys_munmap+0x59/0x80 [ 31.165732] do_syscall_64+0x3f/0x90 [ 31.165995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.166348] [ 31.166468] The buggy address belongs to the object at ffff88801a3e6bc8 [ 31.166468] which belongs to the cache vm_area_struct of size 168 [ 31.167284] The buggy address is located 88 bytes inside of [ 31.167284] freed 168-byte region [ffff88801a3e6bc8, ffff88801a3e6c70) [ 31.168060] [ 31.168181] The buggy address belongs to the physical page: [ 31.168548] page:0000000082d7e5f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3e6 [ 31.169157] memcg:ffff8880167b6301 [ 31.169396] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.169755] page_type: 0xffffffff() [ 31.170004] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.170513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167b6301 [ 31.171017] page dumped because: kasan: bad access detected [ 31.171383] [ 31.171503] Memory state around the buggy address: [ 31.171821] ffff88801a3e6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.172291] ffff88801a3e6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.172763] >ffff88801a3e6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.173243] ^ [ 31.173538] ffff88801a3e6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.174015] ffff88801a3e6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.174484] ================================================================== [ 31.175025] Disabling lock debugging due to kernel taint [ 33.216618] BUG: Bad rss-counter state mm:000000009cdcb42f type:MM_FILEPAGES val:33 [ 33.217845] BUG: Bad rss-counter state mm:000000009cdcb42f type:MM_ANONPAGES val:22 [ 33.680583] BUG: Bad rss-counter state mm:000000001685f4a7 type:MM_FILEPAGES val:33 [ 33.681714] BUG: Bad rss-counter state mm:000000001685f4a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57591' (ECDSA) to the list of known hosts. 2023/06/21 07:43:43 fuzzer started 2023/06/21 07:43:43 dialing manager at localhost:36067 2023/06/21 07:43:43 checking machine... 2023/06/21 07:43:43 checking revisions... [ 34.411012] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:43:43 testing simple program... [ 34.455954] cgroup: Unknown subsys name 'net' [ 34.517655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09930 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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=00007f956f6b1110 CR3=00000000098ee000 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=cf5df2249c7abca86345058d5ca65c46 XMM02=ec2efd57dc4c00df000000000011ae50 XMM03=2b16670ef6100da1000000000011af20 XMM04=561e70e9a7e614ad00000000000ae988 XMM05=19e9129bd510f23500000000001321f8 XMM06=9d9d3148e885bd0b0000000000131060 XMM07=e042d86d42eb936e00000000001223e8 XMM08=2b16670ef6100da1000000000011af20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000004 RCX=ffffffff81f2bfca RDX=ffff888014279b40 RSI=0000000000000000 RDI=0000000000000003 RBP=ffffffff849c45c0 RSP=ffff88801c6b7a70 R8 =0000000000000003 R9 =0000000000000025 R10=000000000000001f R11=00000000000b6a61 R12=000000000000001f R13=0000000000000003 R14=0000000000000004 R15=ffff88801421f500 RIP=ffffffff814c027c 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 00007f0e8d952900 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=00007ffd61036000 CR3=000000000edfe000 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