syzkaller login: [ 31.118225] BUG: Bad rss-counter state mm:00000000466f6558 type:MM_FILEPAGES val:33 [ 31.119480] BUG: Bad rss-counter state mm:00000000466f6558 type:MM_ANONPAGES val:22 [ 31.162071] ================================================================== [ 31.163002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.164123] Read of size 8 at addr ffff8880095de6b0 by task sshd/220 [ 31.164933] [ 31.165153] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.166017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166988] Call Trace: [ 31.167307] [ 31.167592] dump_stack_lvl+0x91/0xf0 [ 31.168084] print_report+0xcc/0x620 [ 31.168597] ? __virt_addr_valid+0x102/0x340 [ 31.169153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170400] kasan_report+0xbe/0xf0 [ 31.170877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171506] vma_interval_tree_remove+0xc75/0xec0 [ 31.172150] vma_prepare+0xc54/0x11a0 [ 31.172646] __split_vma+0x5af/0x950 [ 31.173132] ? __pfx___split_vma+0x10/0x10 [ 31.173676] ? find_held_lock+0x2c/0x110 [ 31.174217] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.174803] ? lock_is_held_type+0x9f/0x120 [ 31.175364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.175989] ? mtree_range_walk+0x632/0x900 [ 31.176592] ? mas_walk+0x5c7/0x7c0 [ 31.177080] do_vmi_munmap+0x1f1/0x2b0 [ 31.177584] mmap_region+0x1f9/0x2660 [ 31.178086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.178619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.179358] ? __pfx_lock_acquire+0x10/0x10 [ 31.179913] ? __pfx_mmap_region+0x10/0x10 [ 31.180478] ? security_mmap_addr+0x7d/0xa0 [ 31.181031] ? get_unmapped_area+0x1f5/0x3f0 [ 31.181595] do_mmap+0x854/0xf00 [ 31.182045] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.182559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.183142] ksys_mmap_pgoff+0x3af/0x500 [ 31.183672] do_syscall_64+0x3f/0x90 [ 31.184186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184853] RIP: 0033:0x7f1544da5d82 [ 31.185327] 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 [ 31.187517] RSP: 002b:00007ffdcb6de108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.188459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1544da5d82 [ 31.189330] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15441df000 [ 31.190202] RBP: 00007f15441df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.191073] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff65fdfec0 [ 31.191942] R13: 00007ffdcb6de120 R14: 00007ffdcb6de150 R15: 00007ffdcb6de4b0 [ 31.192851] [ 31.193149] [ 31.193372] Allocated by task 213: [ 31.193815] kasan_save_stack+0x22/0x50 [ 31.194331] kasan_set_track+0x25/0x30 [ 31.194837] __kasan_slab_alloc+0x59/0x70 [ 31.195381] kmem_cache_alloc+0x16b/0x370 [ 31.195917] vm_area_dup+0x20/0x160 [ 31.196406] __split_vma+0x170/0x950 [ 31.196889] split_vma+0xc6/0x110 [ 31.197340] mprotect_fixup+0x8d2/0xb30 [ 31.197856] do_mprotect_pkey+0x87e/0xd40 [ 31.198399] __x64_sys_mprotect+0x78/0xc0 [ 31.198939] do_syscall_64+0x3f/0x90 [ 31.199425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200087] [ 31.200325] Freed by task 213: [ 31.200730] kasan_save_stack+0x22/0x50 [ 31.201251] kasan_set_track+0x25/0x30 [ 31.201803] kasan_save_free_info+0x2b/0x50 [ 31.202361] __kasan_slab_free+0x10a/0x190 [ 31.202915] kmem_cache_free+0x10d/0x4d0 [ 31.203444] rcu_core+0x8c8/0x2860 [ 31.203916] __do_softirq+0x1b7/0x7d4 [ 31.204430] [ 31.204652] Last potentially related work creation: [ 31.205256] kasan_save_stack+0x22/0x50 [ 31.205784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.206373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.207049] remove_vma+0x139/0x170 [ 31.207529] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.208091] do_vmi_munmap+0x1f1/0x2b0 [ 31.208590] __vm_munmap+0x138/0x3a0 [ 31.209062] __x64_sys_munmap+0x59/0x80 [ 31.209561] do_syscall_64+0x3f/0x90 [ 31.210045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.210688] [ 31.210902] Second to last potentially related work creation: [ 31.211594] kasan_save_stack+0x22/0x50 [ 31.212116] __kasan_record_aux_stack+0x8e/0xa0 [ 31.212699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.213341] remove_vma+0x139/0x170 [ 31.213804] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.214379] do_vmi_munmap+0x1f1/0x2b0 [ 31.214862] mmap_region+0x1f9/0x2660 [ 31.215344] do_mmap+0x854/0xf00 [ 31.215779] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216300] ksys_mmap_pgoff+0x3af/0x500 [ 31.216803] do_syscall_64+0x3f/0x90 [ 31.217285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217930] [ 31.218154] The buggy address belongs to the object at ffff8880095de658 [ 31.218154] which belongs to the cache vm_area_struct of size 168 [ 31.219624] The buggy address is located 88 bytes inside of [ 31.219624] freed 168-byte region [ffff8880095de658, ffff8880095de700) [ 31.221041] [ 31.221263] The buggy address belongs to the physical page: [ 31.221946] page:000000009a72bc30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95de [ 31.223027] memcg:ffff88800de14301 [ 31.223450] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.224115] page_type: 0xffffffff() [ 31.224575] raw: 0100000000000200 ffff8880087a0c80 ffffea000025ab00 dead000000000002 [ 31.225495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de14301 [ 31.226409] page dumped because: kasan: bad access detected [ 31.227074] [ 31.227288] Memory state around the buggy address: [ 31.227867] ffff8880095de580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228736] ffff8880095de600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.229590] >ffff8880095de680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.230440] ^ [ 31.231028] ffff8880095de700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.231902] ffff8880095de780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.232778] ================================================================== [ 31.233790] Disabling lock debugging due to kernel taint [ 32.917017] BUG: Bad rss-counter state mm:00000000c5960b47 type:MM_FILEPAGES val:33 [ 32.917673] BUG: Bad rss-counter state mm:00000000c5960b47 type:MM_ANONPAGES val:22 [ 33.384001] BUG: Bad rss-counter state mm:000000004f76ff5c type:MM_FILEPAGES val:33 [ 33.384978] BUG: Bad rss-counter state mm:000000004f76ff5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27294' (ECDSA) to the list of known hosts. 2023/06/20 18:12:40 fuzzer started 2023/06/20 18:12:40 dialing manager at localhost:36067 2023/06/20 18:12:40 checking machine... 2023/06/20 18:12:40 checking revisions... [ 34.078481] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:12:40 testing simple program... [ 34.124520] cgroup: Unknown subsys name 'net' [ 34.168844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81935be9 RDX=0000000000000000 RSI=ffffffff86157bac RDI=ffffffff85e128dc RBP=ffffffff85e128dc RSP=ffff88800d87f3f0 R8 =ffffffff86157bac R9 =ffff88800d87f4e8 R10=0000000000038001 R11=0000000000025fc6 R12=ffffffff85e128dc R13=ffffffff85e128dc R14=ffffffff85e128dc R15=dffffc0000000000 RIP=ffffffff8112fc6e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7876c32900 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=00007f78761459e0 CR3=0000000008ece000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6f7a2390a61f244d00000000000ae988 XMM05=b29a0fa570e0398f0000000000133d10 XMM06=19e9129bd510f2350000000000132b70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d825b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=dffffc0000000000 RSI=ffffffff860d825a RDI=ffffffff860d825b RBP=ffff8880181c7368 RSP=ffff8880181c72a0 R8 =ffffffff860d825a R9 =ffff8880181c7350 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880181c7370 R13=ffff8880181c7358 R14=ffff8880181c7351 R15=ffff8880181c7310 RIP=ffffffff81130a98 RFL=00000202 [-------] 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 00007f4843d39900 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=00007fff2739f000 CR3=0000000006afe000 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