syzkaller login: [ 38.706389] BUG: Bad rss-counter state mm:000000009a6e5092 type:MM_FILEPAGES val:33 [ 38.707420] BUG: Bad rss-counter state mm:000000009a6e5092 type:MM_ANONPAGES val:22 [ 38.873342] ================================================================== [ 38.874268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.875188] Read of size 8 at addr ffff888009a5d140 by task sshd/219 [ 38.875954] [ 38.876309] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.877167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.878149] Call Trace: [ 38.878483] [ 38.878774] dump_stack_lvl+0x91/0xf0 [ 38.879259] print_report+0xcc/0x620 [ 38.879737] ? __virt_addr_valid+0x102/0x340 [ 38.880282] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880898] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881537] kasan_report+0xbe/0xf0 [ 38.882025] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882640] vma_interval_tree_remove+0xc75/0xec0 [ 38.883247] vma_prepare+0xc54/0x11a0 [ 38.883764] __split_vma+0x5af/0x950 [ 38.884272] ? __pfx___split_vma+0x10/0x10 [ 38.884849] ? find_held_lock+0x2c/0x110 [ 38.885403] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.886035] ? lock_is_held_type+0x9f/0x120 [ 38.886618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887259] ? mtree_range_walk+0x632/0x900 [ 38.887860] ? mas_walk+0x5c7/0x7c0 [ 38.888358] do_vmi_munmap+0x1f1/0x2b0 [ 38.888880] mmap_region+0x1f9/0x2660 [ 38.889388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.889956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890706] ? __pfx_lock_acquire+0x10/0x10 [ 38.891279] ? __pfx_mmap_region+0x10/0x10 [ 38.891855] ? security_mmap_addr+0x7d/0xa0 [ 38.892423] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893019] do_mmap+0x854/0xf00 [ 38.893509] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.894652] ksys_mmap_pgoff+0x3af/0x500 [ 38.895197] do_syscall_64+0x3f/0x90 [ 38.895710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896402] RIP: 0033:0x7f6822335d82 [ 38.896897] 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 [ 38.899156] RSP: 002b:00007ffdf7cb16c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6822335d82 [ 38.901053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f682176f000 [ 38.901998] RBP: 00007f682176f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f6a359ec0 [ 38.903816] R13: 00007ffdf7cb16e0 R14: 00007ffdf7cb1710 R15: 00007ffdf7cb1a70 [ 38.904733] [ 38.905053] [ 38.905283] Allocated by task 212: [ 38.905750] kasan_save_stack+0x22/0x50 [ 38.906277] kasan_set_track+0x25/0x30 [ 38.906809] __kasan_slab_alloc+0x59/0x70 [ 38.907360] kmem_cache_alloc+0x16b/0x370 [ 38.907929] vm_area_dup+0x20/0x160 [ 38.908416] __split_vma+0x170/0x950 [ 38.908925] split_vma+0xc6/0x110 [ 38.909390] mprotect_fixup+0x8d2/0xb30 [ 38.909949] do_mprotect_pkey+0x87e/0xd40 [ 38.910508] __x64_sys_mprotect+0x78/0xc0 [ 38.911084] do_syscall_64+0x3f/0x90 [ 38.911602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912285] [ 38.912522] Freed by task 212: [ 38.912947] kasan_save_stack+0x22/0x50 [ 38.913476] kasan_set_track+0x25/0x30 [ 38.914040] kasan_save_free_info+0x2b/0x50 [ 38.914614] __kasan_slab_free+0x10a/0x190 [ 38.915179] kmem_cache_free+0x10d/0x4d0 [ 38.915725] rcu_core+0x8c8/0x2860 [ 38.916190] __do_softirq+0x1b7/0x7d4 [ 38.916706] [ 38.916939] Last potentially related work creation: [ 38.917592] kasan_save_stack+0x22/0x50 [ 38.918129] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919452] remove_vma+0x139/0x170 [ 38.919939] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920523] do_vmi_munmap+0x1f1/0x2b0 [ 38.921045] __vm_munmap+0x138/0x3a0 [ 38.921554] __x64_sys_munmap+0x59/0x80 [ 38.922099] do_syscall_64+0x3f/0x90 [ 38.922610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923278] [ 38.923508] Second to last potentially related work creation: [ 38.924239] kasan_save_stack+0x22/0x50 [ 38.924793] __kasan_record_aux_stack+0x8e/0xa0 [ 38.925394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926098] remove_vma+0x139/0x170 [ 38.926591] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.927188] do_vmi_munmap+0x1f1/0x2b0 [ 38.927711] mmap_region+0x1f9/0x2660 [ 38.928228] do_mmap+0x854/0xf00 [ 38.928681] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.929188] ksys_mmap_pgoff+0x7d/0x500 [ 38.929724] do_syscall_64+0x3f/0x90 [ 38.930228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930913] [ 38.931137] The buggy address belongs to the object at ffff888009a5d0e8 [ 38.931137] which belongs to the cache vm_area_struct of size 168 [ 38.932727] The buggy address is located 88 bytes inside of [ 38.932727] freed 168-byte region [ffff888009a5d0e8, ffff888009a5d190) [ 38.934254] [ 38.934487] The buggy address belongs to the physical page: [ 38.935207] page:00000000e8536bbc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a5d [ 38.936353] memcg:ffff88800ddbb901 [ 38.936824] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.937522] page_type: 0xffffffff() [ 38.938014] raw: 0100000000000200 ffff8880087a0c80 ffffea000036db40 dead000000000008 [ 38.938984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddbb901 [ 38.939940] page dumped because: kasan: bad access detected [ 38.940652] [ 38.940882] Memory state around the buggy address: [ 38.941513] ffff888009a5d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.942431] ffff888009a5d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.943346] >ffff888009a5d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944252] ^ [ 38.944942] ffff888009a5d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.945811] ffff888009a5d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.946643] ================================================================== [ 38.947774] Disabling lock debugging due to kernel taint [ 40.996335] BUG: Bad rss-counter state mm:000000000826264c type:MM_FILEPAGES val:33 [ 40.997315] BUG: Bad rss-counter state mm:000000000826264c type:MM_ANONPAGES val:22 [ 41.514891] BUG: Bad rss-counter state mm:000000001df505d5 type:MM_FILEPAGES val:33 [ 41.516050] BUG: Bad rss-counter state mm:000000001df505d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61945' (ECDSA) to the list of known hosts. 2023/06/21 05:29:14 fuzzer started 2023/06/21 05:29:14 dialing manager at localhost:36067 2023/06/21 05:29:14 checking machine... 2023/06/21 05:29:14 checking revisions... [ 42.188278] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:29:14 testing simple program... [ 42.243208] cgroup: Unknown subsys name 'net' [ 42.280888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:14 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864bbb54 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =ffffffff864bbb58 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f52d1c0 R15=ffff88800d0a9080 RIP=ffffffff810bd05d RFL=00000296 [--S-AP-] 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 00007fd1dd6b4700 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=00007f6866b510b0 CR3=000000000ef32000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3233325b646873732034313a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f5d7c20a140 CR3=000000000951a000 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=4334864f5c2dfb9d4a4c7564811cceaa XMM02=ec2efd57dc4c00df000000000011ac88 XMM03=6ae92dae1a4fcf39000000000011ad58 XMM04=f1f7625bec4e5db800000000000ae988 XMM05=7e095e1d6ee91a2400000000001341c8 XMM06=db20f175d54767f00000000000133268 XMM07=e042d86d42eb936e0000000000121d20 XMM08=6ae92dae1a4fcf39000000000011ad58 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000