syzkaller login: [ 38.754154] BUG: Bad rss-counter state mm:000000006f9a06f3 type:MM_FILEPAGES val:33 [ 38.755736] BUG: Bad rss-counter state mm:000000006f9a06f3 type:MM_ANONPAGES val:22 [ 38.886263] ================================================================== [ 38.887103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.887966] Read of size 8 at addr ffff88800e4946b0 by task sshd/219 [ 38.888659] [ 38.888859] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.889841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.890723] Call Trace: [ 38.891015] [ 38.891276] dump_stack_lvl+0x91/0xf0 [ 38.891721] print_report+0xcc/0x620 [ 38.892174] ? __virt_addr_valid+0x102/0x340 [ 38.892677] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893243] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893809] kasan_report+0xbe/0xf0 [ 38.894246] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894809] vma_interval_tree_remove+0xc75/0xec0 [ 38.895359] vma_prepare+0xc54/0x11a0 [ 38.895797] __split_vma+0x5af/0x950 [ 38.896257] ? __pfx___split_vma+0x10/0x10 [ 38.896744] ? find_held_lock+0x2c/0x110 [ 38.897228] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.897755] ? lock_is_held_type+0x9f/0x120 [ 38.898256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.898812] ? mtree_range_walk+0x632/0x900 [ 38.899322] ? mas_walk+0x5c7/0x7c0 [ 38.899763] do_vmi_munmap+0x1f1/0x2b0 [ 38.900227] mmap_region+0x1f9/0x2660 [ 38.900671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.901150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.901805] ? __pfx_lock_acquire+0x10/0x10 [ 38.902299] ? __pfx_mmap_region+0x10/0x10 [ 38.902790] ? security_mmap_addr+0x7d/0xa0 [ 38.903280] ? get_unmapped_area+0x1f5/0x3f0 [ 38.903789] do_mmap+0x854/0xf00 [ 38.904218] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905196] ksys_mmap_pgoff+0x3af/0x500 [ 38.905663] do_syscall_64+0x3f/0x90 [ 38.906106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906711] RIP: 0033:0x7f346f71bd82 [ 38.907134] 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 [ 38.909108] RSP: 002b:00007ffda5860518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.909947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f346f71bd82 [ 38.910734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f346eb55000 [ 38.911524] RBP: 00007f346eb55000 R08: 0000000000000009 R09: 0000000000001000 [ 38.912318] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ef81a3ec0 [ 38.913099] R13: 00007ffda5860530 R14: 00007ffda5860560 R15: 00007ffda58608c0 [ 38.913895] [ 38.914169] [ 38.914372] Allocated by task 212: [ 38.914776] kasan_save_stack+0x22/0x50 [ 38.915247] kasan_set_track+0x25/0x30 [ 38.915716] __kasan_slab_alloc+0x59/0x70 [ 38.916219] kmem_cache_alloc+0x16b/0x370 [ 38.916702] vm_area_dup+0x20/0x160 [ 38.917128] __split_vma+0x170/0x950 [ 38.917568] split_vma+0xc6/0x110 [ 38.917976] mprotect_fixup+0x8d2/0xb30 [ 38.918452] do_mprotect_pkey+0x87e/0xd40 [ 38.918936] __x64_sys_mprotect+0x78/0xc0 [ 38.919420] do_syscall_64+0x3f/0x90 [ 38.919899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920546] [ 38.920759] Freed by task 212: [ 38.921142] kasan_save_stack+0x22/0x50 [ 38.921642] kasan_set_track+0x25/0x30 [ 38.922136] kasan_save_free_info+0x2b/0x50 [ 38.922673] __kasan_slab_free+0x10a/0x190 [ 38.923207] kmem_cache_free+0x10d/0x4d0 [ 38.923719] rcu_core+0x8c8/0x2860 [ 38.924186] __do_softirq+0x1b7/0x7d4 [ 38.924657] [ 38.924874] Last potentially related work creation: [ 38.925460] kasan_save_stack+0x22/0x50 [ 38.925961] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927175] remove_vma+0x139/0x170 [ 38.927624] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928189] do_vmi_munmap+0x1f1/0x2b0 [ 38.928674] __vm_munmap+0x138/0x3a0 [ 38.929137] __x64_sys_munmap+0x59/0x80 [ 38.929628] do_syscall_64+0x3f/0x90 [ 38.930105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930750] [ 38.931090] Second to last potentially related work creation: [ 38.931764] kasan_save_stack+0x22/0x50 [ 38.932290] __kasan_record_aux_stack+0x8e/0xa0 [ 38.932855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933493] remove_vma+0x139/0x170 [ 38.933944] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934502] do_vmi_munmap+0x1f1/0x2b0 [ 38.934982] mmap_region+0x1f9/0x2660 [ 38.935452] do_mmap+0x854/0xf00 [ 38.935883] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936374] ksys_mmap_pgoff+0x3af/0x500 [ 38.936868] do_syscall_64+0x3f/0x90 [ 38.937345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937985] [ 38.938200] The buggy address belongs to the object at ffff88800e494658 [ 38.938200] which belongs to the cache vm_area_struct of size 168 [ 38.939685] The buggy address is located 88 bytes inside of [ 38.939685] freed 168-byte region [ffff88800e494658, ffff88800e494700) [ 38.941096] [ 38.941312] The buggy address belongs to the physical page: [ 38.941977] page:00000000b5dfaf6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe494 [ 38.943060] memcg:ffff88800d651501 [ 38.943484] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.944214] page_type: 0xffffffff() [ 38.944661] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.945584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d651501 [ 38.946485] page dumped because: kasan: bad access detected [ 38.947148] [ 38.947360] Memory state around the buggy address: [ 38.947941] ffff88800e494580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.948790] ffff88800e494600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.949640] >ffff88800e494680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.950489] ^ [ 38.951074] ffff88800e494700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.951933] ffff88800e494780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.952774] ================================================================== [ 38.953727] Disabling lock debugging due to kernel taint [ 40.416977] BUG: Bad rss-counter state mm:00000000b4026fd8 type:MM_FILEPAGES val:33 [ 40.417561] BUG: Bad rss-counter state mm:00000000b4026fd8 type:MM_ANONPAGES val:22 [ 40.873293] BUG: Bad rss-counter state mm:000000001d56d8cf type:MM_FILEPAGES val:33 [ 40.874290] BUG: Bad rss-counter state mm:000000001d56d8cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49413' (ECDSA) to the list of known hosts. 2023/06/20 15:09:22 fuzzer started 2023/06/20 15:09:22 dialing manager at localhost:36067 2023/06/20 15:09:22 checking machine... 2023/06/20 15:09:22 checking revisions... [ 41.626257] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:09:22 testing simple program... [ 41.673367] cgroup: Unknown subsys name 'net' [ 41.711728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:09:22 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=000000000000000e RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000e RDI=ffff888015c3f670 RBP=dffffc0000000000 RSP=ffff888015c3f578 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000e R13=0000000000000cc0 R14=ffff888015c3f600 R15=0000000000000cc0 RIP=ffffffff813ad663 RFL=00000286 [--S--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 00007f2211247900 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=00007f22106a9f20 CR3=00000000139fc000 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=b8532406cf5ca87700000000000ae988 XMM05=ad7c4304748fa2a30000000000134850 XMM06=4fda316b135da52b00000000001332d0 XMM07=fb795ef6d657705600000000001224e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000090 RCX=0000000000000010 RDX=ffffed1002026fae RSI=ffff888010137d60 RDI=00007fffc43a8e60 RBP=00007fffc43a8de0 RSP=ffff888010137c78 R8 =0000000000000000 R9 =00000000611c13b4 R10=000000001add8a14 R11=0000000000000000 R12=ffff888010137ce0 R13=00007fffc43a8e70 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84501883 RFL=00040212 [----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 00007f8ed1805900 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=00007fffc43a3000 CR3=0000000014690000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000