syzkaller login: [ 68.945547] BUG: Bad rss-counter state mm:00000000ca3ce1cf type:MM_FILEPAGES val:33 [ 68.946639] BUG: Bad rss-counter state mm:00000000ca3ce1cf type:MM_ANONPAGES val:22 [ 69.108000] ================================================================== [ 69.109009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.110058] Read of size 8 at addr ffff888019cd7798 by task sshd/228 [ 69.111101] [ 69.111346] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.112296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.113279] Call Trace: [ 69.113598] [ 69.113884] dump_stack_lvl+0x91/0xf0 [ 69.114381] print_report+0xcc/0x620 [ 69.114868] ? __virt_addr_valid+0x102/0x340 [ 69.115423] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.116033] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.116646] kasan_report+0xbe/0xf0 [ 69.117116] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.117731] vma_interval_tree_remove+0xc75/0xec0 [ 69.118328] vma_prepare+0xc54/0x11a0 [ 69.118805] __split_vma+0x5af/0x950 [ 69.119298] ? __pfx___split_vma+0x10/0x10 [ 69.119823] ? find_held_lock+0x2c/0x110 [ 69.120342] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.120906] ? lock_is_held_type+0x9f/0x120 [ 69.121454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.122056] ? mtree_range_walk+0x632/0x900 [ 69.122608] ? mas_walk+0x5c7/0x7c0 [ 69.123087] do_vmi_munmap+0x1f1/0x2b0 [ 69.123581] mmap_region+0x1f9/0x2660 [ 69.124061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.124572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.125279] ? __pfx_lock_acquire+0x10/0x10 [ 69.125818] ? __pfx_mmap_region+0x10/0x10 [ 69.126345] ? security_mmap_addr+0x7d/0xa0 [ 69.126869] ? get_unmapped_area+0x1f5/0x3f0 [ 69.127429] do_mmap+0x854/0xf00 [ 69.127871] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.128364] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.128924] ksys_mmap_pgoff+0x3af/0x500 [ 69.129424] do_syscall_64+0x3f/0x90 [ 69.129899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.130547] RIP: 0033:0x7f8968987d82 [ 69.130999] 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 [ 69.133139] RSP: 002b:00007ffc197f84a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.134033] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8968987d82 [ 69.134876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8967dc1000 [ 69.135722] RBP: 00007f8967dc1000 R08: 0000000000000009 R09: 0000000000001000 [ 69.136564] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd85161980 [ 69.137401] R13: 00007ffc197f84c0 R14: 00007ffc197f84f0 R15: 00007ffc197f8850 [ 69.138254] [ 69.138541] [ 69.138754] Allocated by task 221: [ 69.139192] kasan_save_stack+0x22/0x50 [ 69.139692] kasan_set_track+0x25/0x30 [ 69.140185] __kasan_slab_alloc+0x59/0x70 [ 69.140711] kmem_cache_alloc+0x16b/0x370 [ 69.141224] vm_area_dup+0x20/0x160 [ 69.141677] __split_vma+0x170/0x950 [ 69.142136] split_vma+0xc6/0x110 [ 69.142578] mprotect_fixup+0x8d2/0xb30 [ 69.143090] do_mprotect_pkey+0x87e/0xd40 [ 69.143623] __x64_sys_mprotect+0x78/0xc0 [ 69.144138] do_syscall_64+0x3f/0x90 [ 69.144610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.145249] [ 69.145460] Freed by task 203: [ 69.145848] kasan_save_stack+0x22/0x50 [ 69.146350] kasan_set_track+0x25/0x30 [ 69.146842] kasan_save_free_info+0x2b/0x50 [ 69.147392] __kasan_slab_free+0x10a/0x190 [ 69.147922] kmem_cache_free+0x10d/0x4d0 [ 69.148424] rcu_core+0x8c8/0x2860 [ 69.148865] __do_softirq+0x1b7/0x7d4 [ 69.149344] [ 69.149557] Last potentially related work creation: [ 69.150137] kasan_save_stack+0x22/0x50 [ 69.150636] __kasan_record_aux_stack+0x8e/0xa0 [ 69.151208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.151847] remove_vma+0x139/0x170 [ 69.152346] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.152897] do_vmi_munmap+0x1f1/0x2b0 [ 69.153377] __vm_munmap+0x138/0x3a0 [ 69.153839] __x64_sys_munmap+0x59/0x80 [ 69.154335] do_syscall_64+0x3f/0x90 [ 69.154801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.155468] [ 69.155682] The buggy address belongs to the object at ffff888019cd7740 [ 69.155682] which belongs to the cache vm_area_struct of size 168 [ 69.157140] The buggy address is located 88 bytes inside of [ 69.157140] freed 168-byte region [ffff888019cd7740, ffff888019cd77e8) [ 69.158532] [ 69.158745] The buggy address belongs to the physical page: [ 69.159414] page:0000000099c753dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd7 [ 69.160505] memcg:ffff88800f430c01 [ 69.160924] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.161567] page_type: 0xffffffff() [ 69.162014] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.162925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f430c01 [ 69.163842] page dumped because: kasan: bad access detected [ 69.164497] [ 69.164709] Memory state around the buggy address: [ 69.165282] ffff888019cd7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.166139] ffff888019cd7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 69.166987] >ffff888019cd7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 69.167856] ^ [ 69.168346] ffff888019cd7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 69.169195] ffff888019cd7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 69.170039] ================================================================== [ 69.170935] Disabling lock debugging due to kernel taint [ 71.177733] BUG: Bad rss-counter state mm:00000000218a4763 type:MM_FILEPAGES val:33 [ 71.178920] BUG: Bad rss-counter state mm:00000000218a4763 type:MM_ANONPAGES val:22 [ 71.689904] BUG: Bad rss-counter state mm:0000000002d6e032 type:MM_FILEPAGES val:33 [ 71.690856] BUG: Bad rss-counter state mm:0000000002d6e032 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44026' (ECDSA) to the list of known hosts. 2023/06/21 06:56:56 fuzzer started 2023/06/21 06:56:57 dialing manager at localhost:36067 2023/06/21 06:56:57 checking machine... 2023/06/21 06:56:57 checking revisions... [ 72.315226] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:56:57 testing simple program... [ 72.365878] cgroup: Unknown subsys name 'net' [ 72.402470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:56:56 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffffed10033b3f06 RCX=ffffffff812e0135 RDX=ffffed10033b3f05 RSI=0000000000000004 RDI=ffff888019d9f828 RBP=ffffed10033b3f05 RSP=ffff888019d9f7e0 R8 =0000000000000001 R9 =ffffed10033b3f05 R10=ffff888019d9f82b R11=ff00545000000000 R12=ffff88800f27cab8 R13=ffff88800f27cac0 R14=ffffffff8367562f R15=00000000000000e8 RIP=ffffffff8180f121 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 00007f6f5a7d0900 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=00007fffaaed4000 CR3=000000000eee6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81000000 RBX=ffffffff85d7a9c4 RCX=ffffffff810001cd RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff85d7a9c8 RSP=ffff88806cf099c0 R8 =ffffffff86073d08 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d7a9c8 R13=ffffffff85d7a9c4 R14=ffffffff85d7a9c4 R15=dffffc0000000000 RIP=ffffffff8112fc55 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 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=00007f2022fc03c8 CR3=000000000e9ee000 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=2036353a36353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a36353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000