syzkaller login: [ 36.866069] BUG: Bad rss-counter state mm:00000000183fcca5 type:MM_FILEPAGES val:33 [ 36.867261] BUG: Bad rss-counter state mm:00000000183fcca5 type:MM_ANONPAGES val:22 [ 36.905716] ================================================================== [ 36.906794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.908022] Read of size 8 at addr ffff88800f2614e0 by task sshd/220 [ 36.908849] [ 36.909058] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.909870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.910782] Call Trace: [ 36.911085] [ 36.911358] dump_stack_lvl+0x91/0xf0 [ 36.911828] print_report+0xcc/0x620 [ 36.912296] ? __virt_addr_valid+0x102/0x340 [ 36.912829] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.913431] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.914023] kasan_report+0xbe/0xf0 [ 36.914483] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.915085] vma_interval_tree_remove+0xc75/0xec0 [ 36.915671] vma_prepare+0xc54/0x11a0 [ 36.916141] __split_vma+0x5af/0x950 [ 36.916603] ? __pfx___split_vma+0x10/0x10 [ 36.917116] ? find_held_lock+0x2c/0x110 [ 36.917622] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.918166] ? lock_is_held_type+0x9f/0x120 [ 36.918691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.919268] ? mtree_range_walk+0x632/0x900 [ 36.919799] ? mas_walk+0x5c7/0x7c0 [ 36.920291] do_vmi_munmap+0x1f1/0x2b0 [ 36.920777] mmap_region+0x1f9/0x2660 [ 36.921248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.921750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.922452] ? __pfx_lock_acquire+0x10/0x10 [ 36.922978] ? __pfx_mmap_region+0x10/0x10 [ 36.923510] ? security_mmap_addr+0x7d/0xa0 [ 36.924033] ? get_unmapped_area+0x1f5/0x3f0 [ 36.924577] do_mmap+0x854/0xf00 [ 36.925011] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.925498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.926050] ksys_mmap_pgoff+0x3af/0x500 [ 36.926554] do_syscall_64+0x3f/0x90 [ 36.927016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.927651] RIP: 0033:0x7f41a45a1d82 [ 36.928111] 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 [ 36.930222] RSP: 002b:00007ffe17639a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.931117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41a45a1d82 [ 36.931978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41a39db000 [ 36.932819] RBP: 00007f41a39db000 R08: 0000000000000009 R09: 0000000000001000 [ 36.933661] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566b648dec0 [ 36.934495] R13: 00007ffe17639a60 R14: 00007ffe17639a90 R15: 00007ffe17639df0 [ 36.935341] [ 36.935622] [ 36.935836] Allocated by task 213: [ 36.936265] kasan_save_stack+0x22/0x50 [ 36.936765] kasan_set_track+0x25/0x30 [ 36.937265] __kasan_slab_alloc+0x59/0x70 [ 36.937783] kmem_cache_alloc+0x16b/0x370 [ 36.938297] vm_area_dup+0x20/0x160 [ 36.938748] __split_vma+0x170/0x950 [ 36.939215] split_vma+0xc6/0x110 [ 36.939650] mprotect_fixup+0x8d2/0xb30 [ 36.940164] do_mprotect_pkey+0x87e/0xd40 [ 36.940670] __x64_sys_mprotect+0x78/0xc0 [ 36.941186] do_syscall_64+0x3f/0x90 [ 36.941650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.942286] [ 36.942494] Freed by task 213: [ 36.942877] kasan_save_stack+0x22/0x50 [ 36.943368] kasan_set_track+0x25/0x30 [ 36.943864] kasan_save_free_info+0x2b/0x50 [ 36.944394] __kasan_slab_free+0x10a/0x190 [ 36.944920] kmem_cache_free+0x10d/0x4d0 [ 36.945423] rcu_core+0x8c8/0x2860 [ 36.945870] __do_softirq+0x1b7/0x7d4 [ 36.946333] [ 36.946547] Last potentially related work creation: [ 36.947123] kasan_save_stack+0x22/0x50 [ 36.947620] __kasan_record_aux_stack+0x8e/0xa0 [ 36.948195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.948825] remove_vma+0x139/0x170 [ 36.949277] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.949830] do_vmi_munmap+0x1f1/0x2b0 [ 36.950305] __vm_munmap+0x138/0x3a0 [ 36.950770] __x64_sys_munmap+0x59/0x80 [ 36.951254] do_syscall_64+0x3f/0x90 [ 36.951725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.952381] [ 36.952599] The buggy address belongs to the object at ffff88800f261488 [ 36.952599] which belongs to the cache vm_area_struct of size 168 [ 36.954028] The buggy address is located 88 bytes inside of [ 36.954028] freed 168-byte region [ffff88800f261488, ffff88800f261530) [ 36.955406] [ 36.955624] The buggy address belongs to the physical page: [ 36.956294] page:000000007910c778 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf261 [ 36.957370] memcg:ffff88800992a501 [ 36.957794] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.958442] page_type: 0xffffffff() [ 36.958896] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.959796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800992a501 [ 36.960711] page dumped because: kasan: bad access detected [ 36.961353] [ 36.961560] Memory state around the buggy address: [ 36.962129] ffff88800f261380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.962971] ffff88800f261400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.963806] >ffff88800f261480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.964637] ^ [ 36.965385] ffff88800f261500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.966236] ffff88800f261580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.967072] ================================================================== [ 36.968108] Disabling lock debugging due to kernel taint [ 38.961506] BUG: Bad rss-counter state mm:000000001c65776f type:MM_FILEPAGES val:33 [ 38.962266] BUG: Bad rss-counter state mm:000000001c65776f type:MM_ANONPAGES val:22 [ 39.459153] BUG: Bad rss-counter state mm:00000000d3293041 type:MM_FILEPAGES val:33 [ 39.460164] BUG: Bad rss-counter state mm:00000000d3293041 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9158' (ECDSA) to the list of known hosts. 2023/06/20 04:53:17 fuzzer started 2023/06/20 04:53:17 dialing manager at localhost:44161 2023/06/20 04:53:17 checking machine... 2023/06/20 04:53:17 checking revisions... [ 40.165171] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:18 testing simple program... [ 40.224218] cgroup: Unknown subsys name 'net' [ 40.275633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:11 Registers: info registers vcpu 0 RAX=ffffffff863b2967 RBX=0000000000000001 RCX=ffffffff863b2962 RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85fa4238 RBP=ffff88801469f1c8 RSP=ffff88801469f100 R8 =ffffffff863b2962 R9 =ffff88801469f1b0 R10=0000000000038001 R11=000000000008ab99 R12=ffff88801469f1d0 R13=ffff88801469f1b8 R14=ffff88801469f1b1 R15=ffff88801469f170 RIP=ffffffff81130a7e RFL=00000202 [-------] 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 00007f986b6df900 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=00007f986aad0358 CR3=000000000c45e000 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=46253fefd37a383f00000000000ae988 XMM05=dd6ca728905db8fc0000000000134c88 XMM06=19e9129bd510f2350000000000133b40 XMM07=fb795ef6d65770560000000000124040 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000d RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=000000000000000d RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff88801a29faf8 RSP=ffff88801a29fa18 R8 =ffffffff860d68c0 R9 =ffff88801a29fae0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801a29fb00 R13=ffff88801a29fae8 R14=ffff88801a29fae1 R15=ffff88801a29faa0 RIP=ffffffff8112fc16 RFL=00000212 [----A--] 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 00007f88d01ef900 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=00007ffc62db0000 CR3=000000001a3ea000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000