syzkaller login: [ 104.238813] BUG: Bad rss-counter state mm:00000000cfee51e2 type:MM_FILEPAGES val:33 [ 104.239999] BUG: Bad rss-counter state mm:00000000cfee51e2 type:MM_ANONPAGES val:22 [ 104.381042] ================================================================== [ 104.381953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 104.382920] Read of size 8 at addr ffff888016d4b6b0 by task sshd/219 [ 104.383709] [ 104.383931] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 104.385072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 104.386053] Call Trace: [ 104.386401] [ 104.386691] dump_stack_lvl+0x91/0xf0 [ 104.387187] print_report+0xcc/0x620 [ 104.387683] ? __virt_addr_valid+0x102/0x340 [ 104.388241] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.388874] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.389494] kasan_report+0xbe/0xf0 [ 104.389982] ? vma_interval_tree_remove+0xc75/0xec0 [ 104.390635] vma_interval_tree_remove+0xc75/0xec0 [ 104.391238] vma_prepare+0xc54/0x11a0 [ 104.391716] __split_vma+0x5af/0x950 [ 104.392187] ? __pfx___split_vma+0x10/0x10 [ 104.392715] ? find_held_lock+0x2c/0x110 [ 104.393234] do_vmi_align_munmap+0x2ba/0x11f0 [ 104.393809] ? lock_is_held_type+0x9f/0x120 [ 104.394354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 104.394957] ? mtree_range_walk+0x632/0x900 [ 104.395505] ? mas_walk+0x5c7/0x7c0 [ 104.395977] do_vmi_munmap+0x1f1/0x2b0 [ 104.396467] mmap_region+0x1f9/0x2660 [ 104.396945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 104.397467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 104.398179] ? __pfx_lock_acquire+0x10/0x10 [ 104.398738] ? __pfx_mmap_region+0x10/0x10 [ 104.399260] ? security_mmap_addr+0x7d/0xa0 [ 104.399795] ? get_unmapped_area+0x1f5/0x3f0 [ 104.400352] do_mmap+0x854/0xf00 [ 104.400789] vm_mmap_pgoff+0x1a6/0x3a0 [ 104.401286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 104.401847] ksys_mmap_pgoff+0x3af/0x500 [ 104.402367] do_syscall_64+0x3f/0x90 [ 104.402841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.403488] RIP: 0033:0x7f658fe99d82 [ 104.403953] 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 [ 104.406082] RSP: 002b:00007ffee2083ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 104.407005] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f658fe99d82 [ 104.407861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f658f2d3000 [ 104.408709] RBP: 00007f658f2d3000 R08: 0000000000000009 R09: 0000000000001000 [ 104.409552] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e851a2ec0 [ 104.410416] R13: 00007ffee2083ef0 R14: 00007ffee2083f20 R15: 00007ffee2084280 [ 104.411265] [ 104.411560] [ 104.411775] Allocated by task 212: [ 104.412203] kasan_save_stack+0x22/0x50 [ 104.412710] kasan_set_track+0x25/0x30 [ 104.413210] __kasan_slab_alloc+0x59/0x70 [ 104.413743] kmem_cache_alloc+0x16b/0x370 [ 104.414254] vm_area_dup+0x20/0x160 [ 104.414713] __split_vma+0x170/0x950 [ 104.415178] split_vma+0xc6/0x110 [ 104.415632] mprotect_fixup+0x8d2/0xb30 [ 104.416135] do_mprotect_pkey+0x87e/0xd40 [ 104.416651] __x64_sys_mprotect+0x78/0xc0 [ 104.417173] do_syscall_64+0x3f/0x90 [ 104.417644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.418279] [ 104.418515] Freed by task 212: [ 104.418902] kasan_save_stack+0x22/0x50 [ 104.419410] kasan_set_track+0x25/0x30 [ 104.419907] kasan_save_free_info+0x2b/0x50 [ 104.420440] __kasan_slab_free+0x10a/0x190 [ 104.420976] kmem_cache_free+0x10d/0x4d0 [ 104.421480] rcu_core+0x8c8/0x2860 [ 104.421925] __do_softirq+0x1b7/0x7d4 [ 104.422412] [ 104.422634] Last potentially related work creation: [ 104.423214] kasan_save_stack+0x22/0x50 [ 104.423725] __kasan_record_aux_stack+0x8e/0xa0 [ 104.424293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 104.424938] remove_vma+0x139/0x170 [ 104.425387] do_vmi_align_munmap+0xd4a/0x11f0 [ 104.425939] do_vmi_munmap+0x1f1/0x2b0 [ 104.426439] __vm_munmap+0x138/0x3a0 [ 104.426911] __x64_sys_munmap+0x59/0x80 [ 104.427406] do_syscall_64+0x3f/0x90 [ 104.427880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 104.428530] [ 104.428749] The buggy address belongs to the object at ffff888016d4b658 [ 104.428749] which belongs to the cache vm_area_struct of size 168 [ 104.430220] The buggy address is located 88 bytes inside of [ 104.430220] freed 168-byte region [ffff888016d4b658, ffff888016d4b700) [ 104.431626] [ 104.431847] The buggy address belongs to the physical page: [ 104.432514] page:000000003a8647f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d4b [ 104.433591] memcg:ffff88800f10dd01 [ 104.434022] flags: 0x100000000000200(slab|node=0|zone=1) [ 104.434667] page_type: 0xffffffff() [ 104.435123] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 104.436045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f10dd01 [ 104.436943] page dumped because: kasan: bad access detected [ 104.437600] [ 104.437816] Memory state around the buggy address: [ 104.438415] ffff888016d4b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.439264] ffff888016d4b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 104.440113] >ffff888016d4b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.440976] ^ [ 104.441561] ffff888016d4b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 104.442438] ffff888016d4b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 104.443291] ================================================================== [ 104.444301] Disabling lock debugging due to kernel taint [ 106.435114] BUG: Bad rss-counter state mm:00000000aaaa341c type:MM_FILEPAGES val:33 [ 106.436277] BUG: Bad rss-counter state mm:00000000aaaa341c type:MM_ANONPAGES val:22 [ 106.887342] BUG: Bad rss-counter state mm:000000007c4207b8 type:MM_FILEPAGES val:33 [ 106.888686] BUG: Bad rss-counter state mm:000000007c4207b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28070' (ECDSA) to the list of known hosts. 2023/06/19 23:03:25 fuzzer started 2023/06/19 23:03:25 dialing manager at localhost:44161 2023/06/19 23:03:25 checking machine... 2023/06/19 23:03:25 checking revisions... [ 107.500701] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:03:25 testing simple program... [ 107.548917] cgroup: Unknown subsys name 'net' [ 107.596222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:11 Registers: info registers vcpu 0 RAX=ffff8880147476f8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014747601 RSI=ffff888014747688 RDI=ffff888014747688 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000237d4 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff888014747688 R15=ffff88806ce09a78 RIP=ffffffff81131236 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 00007f430056b900 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=00007f42ff978090 CR3=000000000f1d6000 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=653fc00720e07f7500000000000ae988 XMM05=c66d8e8d658f9f51000000000013d310 XMM06=806171799158d967000000000013c3b0 XMM07=fb795ef6d6577056000000000012cb68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009bbf848 RCX=0000000000000001 RDX=1ffff11001377f0b RSI=ffff888009bbff58 RDI=ffff888009bbf858 RBP=ffff888009bbff58 RSP=ffff888009bbf7a0 R8 =ffffffff864b9d5a R9 =ffff888009bbf888 R10=0000000000038001 R11=00000000000b6996 R12=00000000000000a8 R13=ffff888009bb8000 R14=ffff888009bbff58 R15=ffff888009bbf848 RIP=ffffffff81130468 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 00007f9cc48f4900 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=00007ffd7a83c000 CR3=000000000eeb6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000