syzkaller login: [ 179.233715] BUG: Bad rss-counter state mm:0000000074d46ced type:MM_FILEPAGES val:33 [ 179.234928] BUG: Bad rss-counter state mm:0000000074d46ced type:MM_ANONPAGES val:22 [ 179.272549] ================================================================== [ 179.273557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 179.274796] Read of size 8 at addr ffff888018091d08 by task sshd/220 [ 179.276027] [ 179.276292] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 179.277607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 179.278849] Call Trace: [ 179.279174] [ 179.279457] dump_stack_lvl+0x91/0xf0 [ 179.279942] print_report+0xcc/0x620 [ 179.280423] ? __virt_addr_valid+0x102/0x340 [ 179.280970] ? vma_interval_tree_remove+0xc75/0xec0 [ 179.281582] ? vma_interval_tree_remove+0xc75/0xec0 [ 179.282206] kasan_report+0xbe/0xf0 [ 179.282674] ? vma_interval_tree_remove+0xc75/0xec0 [ 179.283290] vma_interval_tree_remove+0xc75/0xec0 [ 179.283886] vma_prepare+0xc54/0x11a0 [ 179.284360] __split_vma+0x5af/0x950 [ 179.284833] ? __pfx___split_vma+0x10/0x10 [ 179.285356] ? find_held_lock+0x2c/0x110 [ 179.285868] do_vmi_align_munmap+0x2ba/0x11f0 [ 179.286442] ? lock_is_held_type+0x9f/0x120 [ 179.286969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 179.287566] ? mtree_range_walk+0x632/0x900 [ 179.288116] ? mas_walk+0x5c7/0x7c0 [ 179.288585] do_vmi_munmap+0x1f1/0x2b0 [ 179.289074] mmap_region+0x1f9/0x2660 [ 179.289562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 179.290073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 179.290815] ? __pfx_lock_acquire+0x10/0x10 [ 179.291352] ? __pfx_mmap_region+0x10/0x10 [ 179.291877] ? security_mmap_addr+0x7d/0xa0 [ 179.292409] ? get_unmapped_area+0x1f5/0x3f0 [ 179.292951] do_mmap+0x854/0xf00 [ 179.293395] vm_mmap_pgoff+0x1a6/0x3a0 [ 179.293894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 179.294467] ksys_mmap_pgoff+0x3af/0x500 [ 179.294968] do_syscall_64+0x3f/0x90 [ 179.295448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 179.296105] RIP: 0033:0x7fba367b3d82 [ 179.296557] 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 [ 179.298696] RSP: 002b:00007fffdba30408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 179.299588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba367b3d82 [ 179.300423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba35bed000 [ 179.301260] RBP: 00007fba35bed000 R08: 0000000000000009 R09: 0000000000001000 [ 179.302105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c0db74b20 [ 179.302965] R13: 00007fffdba30420 R14: 00007fffdba30450 R15: 00007fffdba307b0 [ 179.303818] [ 179.304108] [ 179.304326] Allocated by task 213: [ 179.304756] kasan_save_stack+0x22/0x50 [ 179.305261] kasan_set_track+0x25/0x30 [ 179.305762] __kasan_slab_alloc+0x59/0x70 [ 179.306301] kmem_cache_alloc+0x16b/0x370 [ 179.306816] vm_area_dup+0x20/0x160 [ 179.307264] __split_vma+0x170/0x950 [ 179.307725] split_vma+0xc6/0x110 [ 179.308162] mprotect_fixup+0x8d2/0xb30 [ 179.308657] do_mprotect_pkey+0x87e/0xd40 [ 179.309172] __x64_sys_mprotect+0x78/0xc0 [ 179.309682] do_syscall_64+0x3f/0x90 [ 179.310171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 179.310801] [ 179.311014] Freed by task 213: [ 179.311399] kasan_save_stack+0x22/0x50 [ 179.311892] kasan_set_track+0x25/0x30 [ 179.312387] kasan_save_free_info+0x2b/0x50 [ 179.312913] __kasan_slab_free+0x10a/0x190 [ 179.313435] kmem_cache_free+0x10d/0x4d0 [ 179.313932] rcu_core+0x8c8/0x2860 [ 179.314376] __do_softirq+0x1b7/0x7d4 [ 179.314847] [ 179.315064] Last potentially related work creation: [ 179.315639] kasan_save_stack+0x22/0x50 [ 179.316136] __kasan_record_aux_stack+0x8e/0xa0 [ 179.316699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 179.317389] remove_vma+0x139/0x170 [ 179.317837] do_vmi_align_munmap+0xd4a/0x11f0 [ 179.318415] do_vmi_munmap+0x1f1/0x2b0 [ 179.318899] __vm_munmap+0x138/0x3a0 [ 179.319360] __x64_sys_munmap+0x59/0x80 [ 179.319855] do_syscall_64+0x3f/0x90 [ 179.320323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 179.320968] [ 179.321183] The buggy address belongs to the object at ffff888018091cb0 [ 179.321183] which belongs to the cache vm_area_struct of size 168 [ 179.322639] The buggy address is located 88 bytes inside of [ 179.322639] freed 168-byte region [ffff888018091cb0, ffff888018091d58) [ 179.324012] [ 179.324225] The buggy address belongs to the physical page: [ 179.324871] page:00000000c55f58d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18091 [ 179.325948] memcg:ffff88801808a201 [ 179.326378] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 179.327074] page_type: 0xffffffff() [ 179.327516] raw: 0100000000000200 ffff88800879fc80 ffffea000060b500 dead000000000005 [ 179.328430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801808a201 [ 179.329321] page dumped because: kasan: bad access detected [ 179.329969] [ 179.330199] Memory state around the buggy address: [ 179.330773] ffff888018091c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 179.331616] ffff888018091c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 179.332468] >ffff888018091d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 179.333302] ^ [ 179.333733] ffff888018091d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 179.334586] ffff888018091e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 179.335433] ================================================================== [ 179.336347] Disabling lock debugging due to kernel taint [ 181.314150] BUG: Bad rss-counter state mm:000000004a387490 type:MM_FILEPAGES val:33 [ 181.315187] BUG: Bad rss-counter state mm:000000004a387490 type:MM_ANONPAGES val:22 [ 181.873565] BUG: Bad rss-counter state mm:000000005576373d type:MM_FILEPAGES val:33 [ 181.874738] BUG: Bad rss-counter state mm:000000005576373d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24068' (ECDSA) to the list of known hosts. 2023/06/19 17:47:20 fuzzer started 2023/06/19 17:47:21 dialing manager at localhost:44161 2023/06/19 17:47:21 checking machine... 2023/06/19 17:47:21 checking revisions... [ 182.502610] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:47:21 testing simple program... [ 182.549338] cgroup: Unknown subsys name 'net' [ 182.587988] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:44:51 Registers: info registers vcpu 0 RAX=1ffff11002dfe6a7 RBX=ffff88801a3059e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016ff3538 RBP=ffff88801b01d970 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a3a6f18 R14=ffffffff813782a8 R15=ffff88801a3a6f18 RIP=ffffffff8184634d RFL=00000046 [---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 00007f3d3efd6900 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=000055a955d14768 CR3=000000000f3d4000 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=99376a83510e591d00000000000ae988 XMM05=b1d883e98fe957360000000000144d10 XMM06=cd9b17d5d6973cad0000000000143db8 XMM07=fb795ef6d65770560000000000134380 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880168651c0 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88800eb64c80 RSP=ffff888016367ea0 R8 =0000000000000001 R9 =ffffed1002c6cfbe R10=ffff888016367df7 R11=00000000000b6996 R12=1ffff11002c6cfd5 R13=0000000000000055 R14=0000000000000002 R15=0000000000000b79 RIP=ffffffff814c0384 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 00007efebe004700 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=00007fd37c503618 CR3=0000000016d46000 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=2030323a37343a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a37343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000