syzkaller login: [ 32.446672] BUG: Bad rss-counter state mm:00000000f97fde17 type:MM_FILEPAGES val:33 [ 32.447609] BUG: Bad rss-counter state mm:00000000f97fde17 type:MM_ANONPAGES val:22 [ 32.482795] ================================================================== [ 32.483822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.484777] Read of size 8 at addr ffff888009811ed8 by task sshd/219 [ 32.485637] [ 32.485860] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.486738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.487716] Call Trace: [ 32.488044] [ 32.488332] dump_stack_lvl+0x91/0xf0 [ 32.488837] print_report+0xcc/0x620 [ 32.489341] ? __virt_addr_valid+0x102/0x340 [ 32.489900] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.490525] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.491178] kasan_report+0xbe/0xf0 [ 32.491675] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.492312] vma_interval_tree_remove+0xc75/0xec0 [ 32.492947] vma_prepare+0xc54/0x11a0 [ 32.493470] __split_vma+0x5af/0x950 [ 32.493976] ? __pfx___split_vma+0x10/0x10 [ 32.494515] ? find_held_lock+0x2c/0x110 [ 32.495042] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.495622] ? lock_is_held_type+0x9f/0x120 [ 32.496191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.496825] ? mtree_range_walk+0x632/0x900 [ 32.497392] ? mas_walk+0x5c7/0x7c0 [ 32.497876] do_vmi_munmap+0x1f1/0x2b0 [ 32.498387] mmap_region+0x1f9/0x2660 [ 32.498888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.499412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.500134] ? __pfx_lock_acquire+0x10/0x10 [ 32.500674] ? __pfx_mmap_region+0x10/0x10 [ 32.501216] ? security_mmap_addr+0x7d/0xa0 [ 32.501781] ? get_unmapped_area+0x1f5/0x3f0 [ 32.502354] do_mmap+0x854/0xf00 [ 32.502819] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.503328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.503898] ksys_mmap_pgoff+0x3af/0x500 [ 32.504412] do_syscall_64+0x3f/0x90 [ 32.504900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.505552] RIP: 0033:0x7fafff91cd82 [ 32.506029] 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 [ 32.508169] RSP: 002b:00007ffe6fedfb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.509079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafff91cd82 [ 32.509955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faffed56000 [ 32.510813] RBP: 00007faffed56000 R08: 0000000000000009 R09: 0000000000001000 [ 32.511660] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2f3aedf70 [ 32.512522] R13: 00007ffe6fedfb90 R14: 00007ffe6fedfbc0 R15: 00007ffe6fedff20 [ 32.513414] [ 32.513717] [ 32.513935] Allocated by task 212: [ 32.514372] kasan_save_stack+0x22/0x50 [ 32.514880] kasan_set_track+0x25/0x30 [ 32.515387] __kasan_slab_alloc+0x59/0x70 [ 32.515926] kmem_cache_alloc+0x16b/0x370 [ 32.516461] vm_area_dup+0x20/0x160 [ 32.516921] __split_vma+0x170/0x950 [ 32.517404] split_vma+0xc6/0x110 [ 32.517846] mprotect_fixup+0x8d2/0xb30 [ 32.518357] do_mprotect_pkey+0x87e/0xd40 [ 32.518893] __x64_sys_mprotect+0x78/0xc0 [ 32.519415] do_syscall_64+0x3f/0x90 [ 32.519900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.520553] [ 32.520777] Freed by task 212: [ 32.521173] kasan_save_stack+0x22/0x50 [ 32.521709] kasan_set_track+0x25/0x30 [ 32.522212] kasan_save_free_info+0x2b/0x50 [ 32.522745] __kasan_slab_free+0x10a/0x190 [ 32.523300] kmem_cache_free+0x10d/0x4d0 [ 32.523820] rcu_core+0x8c8/0x2860 [ 32.524266] __do_softirq+0x1b7/0x7d4 [ 32.524749] [ 32.524963] Last potentially related work creation: [ 32.525567] kasan_save_stack+0x22/0x50 [ 32.526079] __kasan_record_aux_stack+0x8e/0xa0 [ 32.526661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.527314] remove_vma+0x139/0x170 [ 32.527769] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.528343] do_vmi_munmap+0x1f1/0x2b0 [ 32.528831] __vm_munmap+0x138/0x3a0 [ 32.529314] __x64_sys_munmap+0x59/0x80 [ 32.529822] do_syscall_64+0x3f/0x90 [ 32.530303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.530950] [ 32.531165] Second to last potentially related work creation: [ 32.531858] kasan_save_stack+0x22/0x50 [ 32.532379] __kasan_record_aux_stack+0x8e/0xa0 [ 32.532955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.533632] remove_vma+0x139/0x170 [ 32.534086] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.534651] do_vmi_munmap+0x1f1/0x2b0 [ 32.535146] mmap_region+0x1f9/0x2660 [ 32.535630] do_mmap+0x854/0xf00 [ 32.536070] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.536583] ksys_mmap_pgoff+0x7d/0x500 [ 32.537080] do_syscall_64+0x3f/0x90 [ 32.537564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.538225] [ 32.538446] The buggy address belongs to the object at ffff888009811e80 [ 32.538446] which belongs to the cache vm_area_struct of size 168 [ 32.539987] The buggy address is located 88 bytes inside of [ 32.539987] freed 168-byte region [ffff888009811e80, ffff888009811f28) [ 32.541423] [ 32.541645] The buggy address belongs to the physical page: [ 32.542322] page:00000000db5f5169 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9811 [ 32.543428] memcg:ffff88800ef00501 [ 32.543871] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.544588] page_type: 0xffffffff() [ 32.545047] raw: 0100000000000200 ffff88800879fc80 ffffea0000693cc0 0000000000000007 [ 32.545985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef00501 [ 32.546936] page dumped because: kasan: bad access detected [ 32.547623] [ 32.547844] Memory state around the buggy address: [ 32.548431] ffff888009811d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.549307] ffff888009811e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.550185] >ffff888009811e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.551046] ^ [ 32.551804] ffff888009811f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.552700] ffff888009811f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.553569] ================================================================== [ 32.554730] Disabling lock debugging due to kernel taint [ 34.543745] BUG: Bad rss-counter state mm:00000000ac8c32e5 type:MM_FILEPAGES val:33 [ 34.544756] BUG: Bad rss-counter state mm:00000000ac8c32e5 type:MM_ANONPAGES val:22 [ 35.097867] BUG: Bad rss-counter state mm:000000002dcea58d type:MM_FILEPAGES val:33 [ 35.099040] BUG: Bad rss-counter state mm:000000002dcea58d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39650' (ECDSA) to the list of known hosts. 2023/06/20 03:45:56 fuzzer started 2023/06/20 03:45:56 dialing manager at localhost:44161 2023/06/20 03:45:56 checking machine... 2023/06/20 03:45:56 checking revisions... [ 35.732400] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:45:56 testing simple program... [ 35.772420] cgroup: Unknown subsys name 'net' [ 35.833313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000092cc0 RCX=0000000000000cc0 RDX=0000000000000000 RSI=0000000000092cc0 RDI=ffff88800f5e802c RBP=ffff8880146df790 RSP=ffff8880146df780 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=ffff88800f5e8000 R15=ffffffff818470dc RIP=ffffffff81787b22 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 00007fd470ac0900 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=00007fd46ffae0d0 CR3=000000000ea48000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9079bf28f2d8e6e800000000000ae988 XMM05=6be2b90a0e717d530000000000135c48 XMM06=806171799158d96700000000001346c8 XMM07=fb795ef6d657705600000000001238a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e57a40 RCX=ffffffff86137d01 RDX=1ffff110011caf49 RSI=ffffffff8180c8da RDI=ffff888008e57a48 RBP=0000000000000003 RSP=ffff888008e57958 R8 =ffffffff86137dd6 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888015e307a0 RIP=ffffffff813ad47f 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 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=00007ffd595f8000 CR3=00000000102d4000 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=35343a3330203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000