syzkaller login: [ 38.834582] BUG: Bad rss-counter state mm:00000000a0188e33 type:MM_FILEPAGES val:33 [ 38.836359] BUG: Bad rss-counter state mm:00000000a0188e33 type:MM_ANONPAGES val:22 [ 38.995564] ================================================================== [ 38.996636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.997753] Read of size 8 at addr ffff888016311df0 by task sshd/220 [ 38.998819] [ 38.999038] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.999911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.000898] Call Trace: [ 39.001222] [ 39.001503] dump_stack_lvl+0x91/0xf0 [ 39.002004] print_report+0xcc/0x620 [ 39.002489] ? __virt_addr_valid+0x102/0x340 [ 39.003041] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.003680] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.004298] kasan_report+0xbe/0xf0 [ 39.004773] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.005392] vma_interval_tree_remove+0xc75/0xec0 [ 39.005997] vma_prepare+0xc54/0x11a0 [ 39.006478] __split_vma+0x5af/0x950 [ 39.006953] ? __pfx___split_vma+0x10/0x10 [ 39.007509] ? find_held_lock+0x2c/0x110 [ 39.008033] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.008602] ? lock_is_held_type+0x9f/0x120 [ 39.009145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.009751] ? mtree_range_walk+0x632/0x900 [ 39.010304] ? mas_walk+0x5c7/0x7c0 [ 39.010783] do_vmi_munmap+0x1f1/0x2b0 [ 39.011276] mmap_region+0x1f9/0x2660 [ 39.011770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.012288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.012996] ? __pfx_lock_acquire+0x10/0x10 [ 39.013536] ? __pfx_mmap_region+0x10/0x10 [ 39.014085] ? security_mmap_addr+0x7d/0xa0 [ 39.014621] ? get_unmapped_area+0x1f5/0x3f0 [ 39.015176] do_mmap+0x854/0xf00 [ 39.015627] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.016122] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.016688] ksys_mmap_pgoff+0x3af/0x500 [ 39.017204] do_syscall_64+0x3f/0x90 [ 39.017689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018340] RIP: 0033:0x7fd470f4fd82 [ 39.018803] 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 [ 39.020957] RSP: 002b:00007ffededcc138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.021875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd470f4fd82 [ 39.022724] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd470389000 [ 39.023589] RBP: 00007fd470389000 R08: 0000000000000009 R09: 0000000000001000 [ 39.024440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b4739cb20 [ 39.025286] R13: 00007ffededcc150 R14: 00007ffededcc180 R15: 00007ffededcc4e0 [ 39.026148] [ 39.026441] [ 39.026659] Allocated by task 213: [ 39.027089] kasan_save_stack+0x22/0x50 [ 39.027616] kasan_set_track+0x25/0x30 [ 39.028111] __kasan_slab_alloc+0x59/0x70 [ 39.028641] kmem_cache_alloc+0x16b/0x370 [ 39.029158] vm_area_dup+0x20/0x160 [ 39.029616] __split_vma+0x170/0x950 [ 39.030084] split_vma+0xc6/0x110 [ 39.030527] mprotect_fixup+0x8d2/0xb30 [ 39.031029] do_mprotect_pkey+0x87e/0xd40 [ 39.031562] __x64_sys_mprotect+0x78/0xc0 [ 39.032086] do_syscall_64+0x3f/0x90 [ 39.032563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033206] [ 39.033423] Freed by task 213: [ 39.033820] kasan_save_stack+0x22/0x50 [ 39.034325] kasan_set_track+0x25/0x30 [ 39.034826] kasan_save_free_info+0x2b/0x50 [ 39.035373] __kasan_slab_free+0x10a/0x190 [ 39.035909] kmem_cache_free+0x10d/0x4d0 [ 39.036424] rcu_core+0x8c8/0x2860 [ 39.036865] __do_softirq+0x1b7/0x7d4 [ 39.037346] [ 39.037560] Last potentially related work creation: [ 39.038162] kasan_save_stack+0x22/0x50 [ 39.038668] __kasan_record_aux_stack+0x8e/0xa0 [ 39.039246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.039976] remove_vma+0x139/0x170 [ 39.040433] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.040992] do_vmi_munmap+0x1f1/0x2b0 [ 39.041480] __vm_munmap+0x138/0x3a0 [ 39.041958] __x64_sys_munmap+0x59/0x80 [ 39.042459] do_syscall_64+0x3f/0x90 [ 39.042936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043593] [ 39.043812] The buggy address belongs to the object at ffff888016311d98 [ 39.043812] which belongs to the cache vm_area_struct of size 168 [ 39.045324] The buggy address is located 88 bytes inside of [ 39.045324] freed 168-byte region [ffff888016311d98, ffff888016311e40) [ 39.046740] [ 39.046960] The buggy address belongs to the physical page: [ 39.047621] page:00000000e915f979 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16311 [ 39.048709] memcg:ffff888016935c01 [ 39.049139] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.049784] page_type: 0xffffffff() [ 39.050234] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.051157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016935c01 [ 39.052070] page dumped because: kasan: bad access detected [ 39.052736] [ 39.052958] Memory state around the buggy address: [ 39.053547] ffff888016311c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.054407] ffff888016311d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.055260] >ffff888016311d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.056126] ^ [ 39.056937] ffff888016311e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.057794] ffff888016311e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.058651] ================================================================== [ 39.059595] Disabling lock debugging due to kernel taint [ 40.920789] BUG: Bad rss-counter state mm:0000000089bf9db4 type:MM_FILEPAGES val:33 [ 40.921640] BUG: Bad rss-counter state mm:0000000089bf9db4 type:MM_ANONPAGES val:22 [ 41.447697] BUG: Bad rss-counter state mm:000000000a4d857a type:MM_FILEPAGES val:33 [ 41.448825] BUG: Bad rss-counter state mm:000000000a4d857a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61861' (ECDSA) to the list of known hosts. 2023/06/20 20:55:02 fuzzer started 2023/06/20 20:55:02 dialing manager at localhost:36067 2023/06/20 20:55:02 checking machine... 2023/06/20 20:55:02 checking revisions... [ 42.148687] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:55:02 testing simple program... [ 42.195016] cgroup: Unknown subsys name 'net' [ 42.245999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fff7d53c728 CR3=0000000005482000 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=00007f2786d2f510000055b40cbdc790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f3c46462fef RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f3c46462fef RSP=ffff88806cf09a50 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f3c46462000 R11=00000000000b6a61 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880180251c0 R15=ffff88800eeabd90 RIP=ffffffff8135b930 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 00007f3c4561f700 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=00007fa14632fe10 CR3=000000000e0f0000 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=2032303a35353a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000