syzkaller login: [ 31.783586] BUG: Bad rss-counter state mm:000000005f48aaf1 type:MM_FILEPAGES val:33 [ 31.784894] BUG: Bad rss-counter state mm:000000005f48aaf1 type:MM_ANONPAGES val:22 [ 31.970060] ================================================================== [ 31.971158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.972275] Read of size 8 at addr ffff8880140a6c20 by task sshd/221 [ 31.973394] [ 31.973656] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.974431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.975180] Call Trace: [ 31.975423] [ 31.975634] dump_stack_lvl+0x91/0xf0 [ 31.976003] print_report+0xcc/0x620 [ 31.976368] ? __virt_addr_valid+0x102/0x340 [ 31.976786] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.977251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.977717] kasan_report+0xbe/0xf0 [ 31.978075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.978537] vma_interval_tree_remove+0xc75/0xec0 [ 31.978984] vma_prepare+0xc54/0x11a0 [ 31.979410] __split_vma+0x5af/0x950 [ 31.979789] ? __pfx___split_vma+0x10/0x10 [ 31.980189] ? find_held_lock+0x2c/0x110 [ 31.980585] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.981015] ? lock_is_held_type+0x9f/0x120 [ 31.981438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.981896] ? mtree_range_walk+0x632/0x900 [ 31.982314] ? mas_walk+0x5c7/0x7c0 [ 31.982676] do_vmi_munmap+0x1f1/0x2b0 [ 31.983044] mmap_region+0x1f9/0x2660 [ 31.983407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.983797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.984346] ? __pfx_lock_acquire+0x10/0x10 [ 31.984756] ? __pfx_mmap_region+0x10/0x10 [ 31.985159] ? security_mmap_addr+0x7d/0xa0 [ 31.985583] ? get_unmapped_area+0x1f5/0x3f0 [ 31.986043] do_mmap+0x854/0xf00 [ 31.986459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.986926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.987458] ksys_mmap_pgoff+0x3af/0x500 [ 31.987944] do_syscall_64+0x3f/0x90 [ 31.988400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.988927] RIP: 0033:0x7fa35157ed82 [ 31.989281] 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 [ 31.990949] RSP: 002b:00007ffde87c79d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.991643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa35157ed82 [ 31.992281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3509b8000 [ 31.992962] RBP: 00007fa3509b8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.993618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c35b3df70 [ 31.994259] R13: 00007ffde87c79f0 R14: 00007ffde87c7a20 R15: 00007ffde87c7d80 [ 31.994902] [ 31.995121] [ 31.995283] Allocated by task 214: [ 31.995609] kasan_save_stack+0x22/0x50 [ 31.995988] kasan_set_track+0x25/0x30 [ 31.996359] __kasan_slab_alloc+0x59/0x70 [ 31.996758] kmem_cache_alloc+0x16b/0x370 [ 31.997146] vm_area_dup+0x20/0x160 [ 31.997508] __split_vma+0x170/0x950 [ 31.997861] split_vma+0xc6/0x110 [ 31.998190] mprotect_fixup+0x8d2/0xb30 [ 31.998566] do_mprotect_pkey+0x87e/0xd40 [ 31.998954] __x64_sys_mprotect+0x78/0xc0 [ 31.999343] do_syscall_64+0x3f/0x90 [ 31.999701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.000176] [ 32.000337] Freed by task 214: [ 32.000635] kasan_save_stack+0x22/0x50 [ 32.001011] kasan_set_track+0x25/0x30 [ 32.001397] kasan_save_free_info+0x2b/0x50 [ 32.001793] __kasan_slab_free+0x10a/0x190 [ 32.002194] kmem_cache_free+0x10d/0x4d0 [ 32.002571] rcu_core+0x8c8/0x2860 [ 32.002908] __do_softirq+0x1b7/0x7d4 [ 32.003269] [ 32.003432] Last potentially related work creation: [ 32.003871] kasan_save_stack+0x22/0x50 [ 32.004254] __kasan_record_aux_stack+0x8e/0xa0 [ 32.004680] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.005158] remove_vma+0x139/0x170 [ 32.005510] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.005924] do_vmi_munmap+0x1f1/0x2b0 [ 32.006286] __vm_munmap+0x138/0x3a0 [ 32.006631] __x64_sys_munmap+0x59/0x80 [ 32.007003] do_syscall_64+0x3f/0x90 [ 32.007364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.007879] [ 32.008042] Second to last potentially related work creation: [ 32.008571] kasan_save_stack+0x22/0x50 [ 32.008953] __kasan_record_aux_stack+0x8e/0xa0 [ 32.009420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.009904] remove_vma+0x139/0x170 [ 32.010247] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.010680] do_vmi_munmap+0x1f1/0x2b0 [ 32.011050] mmap_region+0x1f9/0x2660 [ 32.011428] do_mmap+0x854/0xf00 [ 32.011779] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.012156] ksys_mmap_pgoff+0x7d/0x500 [ 32.012542] do_syscall_64+0x3f/0x90 [ 32.012900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.013410] [ 32.013573] The buggy address belongs to the object at ffff8880140a6bc8 [ 32.013573] which belongs to the cache vm_area_struct of size 168 [ 32.014798] The buggy address is located 88 bytes inside of [ 32.014798] freed 168-byte region [ffff8880140a6bc8, ffff8880140a6c70) [ 32.015893] [ 32.016056] The buggy address belongs to the physical page: [ 32.016559] page:00000000ff6177a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x140a6 [ 32.017413] memcg:ffff88800cc58b01 [ 32.017741] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.018228] page_type: 0xffffffff() [ 32.018570] raw: 0100000000000200 ffff88800879fc80 ffffea0000263200 dead000000000008 [ 32.019269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc58b01 [ 32.019965] page dumped because: kasan: bad access detected [ 32.020502] [ 32.020700] Memory state around the buggy address: [ 32.021199] ffff8880140a6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.021867] ffff8880140a6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.022524] >ffff8880140a6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.023177] ^ [ 32.023584] ffff8880140a6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.024240] ffff8880140a6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.024890] ================================================================== [ 32.025671] Disabling lock debugging due to kernel taint [ 34.658939] BUG: Bad rss-counter state mm:00000000f1c207f3 type:MM_FILEPAGES val:33 [ 34.660005] BUG: Bad rss-counter state mm:00000000f1c207f3 type:MM_ANONPAGES val:22 [ 35.165421] BUG: Bad rss-counter state mm:00000000cdaf16b5 type:MM_FILEPAGES val:33 [ 35.166412] BUG: Bad rss-counter state mm:00000000cdaf16b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39701' (ECDSA) to the list of known hosts. 2023/06/19 13:32:29 fuzzer started 2023/06/19 13:32:29 dialing manager at localhost:44161 2023/06/19 13:32:29 checking machine... 2023/06/19 13:32:29 checking revisions... [ 35.897181] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:32:29 testing simple program... [ 35.950328] cgroup: Unknown subsys name 'net' [ 36.001530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000003 RCX=ffffffff81378270 RDX=1ffff110034380fc RSI=0000000000000000 RDI=ffff88800844f780 RBP=dead000000000122 RSP=ffff888008d7fcf8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dead000000000100 R13=ffff88801a1c07a0 R14=ffff88801a1c0720 R15=dffffc0000000000 RIP=ffffffff81845e42 RFL=00000287 [--S--PC] 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=00007f3265580650 CR3=000000000e27e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880143cf528 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818a2995 RDI=ffff8880143cf534 RBP=0000000000000007 RSP=ffff8880143cf440 R8 =0000000000000001 R9 =ffff8880143cf4a0 R10=0000000000038001 R11=00000000000237ae R12=ffff8880143cf528 R13=0000000000000000 R14=ffff888014131b40 R15=ffff888016070fc8 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f80cd04a900 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=00007f80cc459e30 CR3=000000000988e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=90fd6c7904a6217500000000000ae988 XMM05=cee7a4e14b8e43650000000000135ff0 XMM06=c291bd5c70af25b90000000000134de0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000