syzkaller login: [ 105.857912] BUG: Bad rss-counter state mm:00000000c9009df0 type:MM_FILEPAGES val:33 [ 105.859226] BUG: Bad rss-counter state mm:00000000c9009df0 type:MM_ANONPAGES val:22 [ 106.006993] ================================================================== [ 106.007978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 106.008937] Read of size 8 at addr ffff88800e9074e0 by task sshd/218 [ 106.009714] [ 106.009934] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 106.011157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 106.012149] Call Trace: [ 106.012468] [ 106.012783] dump_stack_lvl+0x91/0xf0 [ 106.013278] print_report+0xcc/0x620 [ 106.013753] ? __virt_addr_valid+0x102/0x340 [ 106.014304] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.014917] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.015535] kasan_report+0xbe/0xf0 [ 106.016003] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.016624] vma_interval_tree_remove+0xc75/0xec0 [ 106.017230] vma_prepare+0xc54/0x11a0 [ 106.017712] __split_vma+0x5af/0x950 [ 106.018177] ? __pfx___split_vma+0x10/0x10 [ 106.018707] ? find_held_lock+0x2c/0x110 [ 106.019242] do_vmi_align_munmap+0x2ba/0x11f0 [ 106.019806] ? lock_is_held_type+0x9f/0x120 [ 106.020341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 106.020944] ? mtree_range_walk+0x632/0x900 [ 106.021487] ? mas_walk+0x5c7/0x7c0 [ 106.021957] do_vmi_munmap+0x1f1/0x2b0 [ 106.022447] mmap_region+0x1f9/0x2660 [ 106.022925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 106.023451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 106.024160] ? __pfx_lock_acquire+0x10/0x10 [ 106.024686] ? __pfx_mmap_region+0x10/0x10 [ 106.025207] ? security_mmap_addr+0x7d/0xa0 [ 106.025731] ? get_unmapped_area+0x1f5/0x3f0 [ 106.026274] do_mmap+0x854/0xf00 [ 106.026709] vm_mmap_pgoff+0x1a6/0x3a0 [ 106.027204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 106.027770] ksys_mmap_pgoff+0x3af/0x500 [ 106.028278] do_syscall_64+0x3f/0x90 [ 106.028752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.029391] RIP: 0033:0x7f2f8341ed82 [ 106.029842] 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 [ 106.032041] RSP: 002b:00007ffd5b71c318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 106.032972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f8341ed82 [ 106.033843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f82858000 [ 106.034718] RBP: 00007f2f82858000 R08: 0000000000000009 R09: 0000000000001000 [ 106.035601] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584b73e7f70 [ 106.036469] R13: 00007ffd5b71c330 R14: 00007ffd5b71c360 R15: 00007ffd5b71c6c0 [ 106.037347] [ 106.037647] [ 106.037864] Allocated by task 211: [ 106.038304] kasan_save_stack+0x22/0x50 [ 106.038825] kasan_set_track+0x25/0x30 [ 106.039329] __kasan_slab_alloc+0x59/0x70 [ 106.039872] kmem_cache_alloc+0x16b/0x370 [ 106.040402] vm_area_dup+0x20/0x160 [ 106.040870] __split_vma+0x170/0x950 [ 106.041350] split_vma+0xc6/0x110 [ 106.041799] mprotect_fixup+0x8d2/0xb30 [ 106.042320] do_mprotect_pkey+0x87e/0xd40 [ 106.042853] __x64_sys_mprotect+0x78/0xc0 [ 106.043404] do_syscall_64+0x3f/0x90 [ 106.043890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.044549] [ 106.044770] Freed by task 202: [ 106.045172] kasan_save_stack+0x22/0x50 [ 106.045692] kasan_set_track+0x25/0x30 [ 106.046205] kasan_save_free_info+0x2b/0x50 [ 106.046759] __kasan_slab_free+0x10a/0x190 [ 106.047310] kmem_cache_free+0x10d/0x4d0 [ 106.047833] rcu_core+0x8c8/0x2860 [ 106.048289] __do_softirq+0x1b7/0x7d4 [ 106.048781] [ 106.049005] Last potentially related work creation: [ 106.049613] kasan_save_stack+0x22/0x50 [ 106.050127] __kasan_record_aux_stack+0x8e/0xa0 [ 106.050726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 106.051401] remove_vma+0x139/0x170 [ 106.051862] do_vmi_align_munmap+0xd4a/0x11f0 [ 106.052480] do_vmi_munmap+0x1f1/0x2b0 [ 106.052993] __vm_munmap+0x138/0x3a0 [ 106.053466] __x64_sys_munmap+0x59/0x80 [ 106.053975] do_syscall_64+0x3f/0x90 [ 106.054462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.055110] [ 106.055341] The buggy address belongs to the object at ffff88800e907488 [ 106.055341] which belongs to the cache vm_area_struct of size 168 [ 106.056832] The buggy address is located 88 bytes inside of [ 106.056832] freed 168-byte region [ffff88800e907488, ffff88800e907530) [ 106.058264] [ 106.058487] The buggy address belongs to the physical page: [ 106.059163] page:000000006a78e026 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe907 [ 106.060290] memcg:ffff88800cd9b301 [ 106.060724] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 106.061436] page_type: 0xffffffff() [ 106.061893] raw: 0100000000000200 ffff88800879fc80 ffffea0000359140 dead000000000005 [ 106.062832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd9b301 [ 106.063766] page dumped because: kasan: bad access detected [ 106.064440] [ 106.064665] Memory state around the buggy address: [ 106.065255] ffff88800e907380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 106.066123] ffff88800e907400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 106.066994] >ffff88800e907480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 106.067908] ^ [ 106.068673] ffff88800e907500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 106.069538] ffff88800e907580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 106.070400] ================================================================== [ 106.071339] Disabling lock debugging due to kernel taint [ 108.019755] BUG: Bad rss-counter state mm:0000000068f69e19 type:MM_FILEPAGES val:33 [ 108.020660] BUG: Bad rss-counter state mm:0000000068f69e19 type:MM_ANONPAGES val:22 [ 108.379439] BUG: Bad rss-counter state mm:000000009403566b type:MM_FILEPAGES val:33 [ 108.380276] BUG: Bad rss-counter state mm:000000009403566b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17264' (ECDSA) to the list of known hosts. 2023/06/20 06:27:22 fuzzer started 2023/06/20 06:27:22 dialing manager at localhost:44161 2023/06/20 06:27:22 checking machine... 2023/06/20 06:27:22 checking revisions... [ 108.955337] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:27:22 testing simple program... [ 108.984472] cgroup: Unknown subsys name 'net' [ 109.015675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:06 Registers: info registers vcpu 0 RAX=00007ffc55429d20 RBX=00007ffc5542adc0 RCX=0000000000000000 RDX=ffff888015d99b40 RSI=ffffffff82157ccb RDI=ffff88800fddfd20 RBP=ffff88800fddfd18 RSP=ffff88800fddfae8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000001000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000001000 R15=dffffc0000000000 RIP=ffffffff82157ce5 RFL=00040246 [---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 00007f125e862900 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=00007f125ee19618 CR3=000000000f76a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fef39001338 CR3=000000000f25a000 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=37323a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383738 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000