syzkaller login: [ 32.896988] BUG: Bad rss-counter state mm:000000003d575531 type:MM_FILEPAGES val:33 [ 32.898257] BUG: Bad rss-counter state mm:000000003d575531 type:MM_ANONPAGES val:22 [ 33.075433] ================================================================== [ 33.076615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.077863] Read of size 8 at addr ffff888019e6da50 by task sshd/220 [ 33.078586] [ 33.078734] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.079300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.079962] Call Trace: [ 33.080174] [ 33.080372] dump_stack_lvl+0x91/0xf0 [ 33.080700] print_report+0xcc/0x620 [ 33.081020] ? __virt_addr_valid+0x102/0x340 [ 33.081383] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.081789] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.082202] kasan_report+0xbe/0xf0 [ 33.082515] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.082927] vma_interval_tree_remove+0xc75/0xec0 [ 33.083318] vma_prepare+0xc54/0x11a0 [ 33.083644] __split_vma+0x5af/0x950 [ 33.083955] ? __pfx___split_vma+0x10/0x10 [ 33.084300] ? find_held_lock+0x2c/0x110 [ 33.084644] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.085023] ? lock_is_held_type+0x9f/0x120 [ 33.085372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.085768] ? mtree_range_walk+0x632/0x900 [ 33.086128] ? mas_walk+0x5c7/0x7c0 [ 33.086445] do_vmi_munmap+0x1f1/0x2b0 [ 33.086766] mmap_region+0x1f9/0x2660 [ 33.087082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.087421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.087897] ? __pfx_lock_acquire+0x10/0x10 [ 33.088248] ? __pfx_mmap_region+0x10/0x10 [ 33.088595] ? security_mmap_addr+0x7d/0xa0 [ 33.088942] ? get_unmapped_area+0x1f5/0x3f0 [ 33.089311] do_mmap+0x854/0xf00 [ 33.089603] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.089934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.090306] ksys_mmap_pgoff+0x3af/0x500 [ 33.090641] do_syscall_64+0x3f/0x90 [ 33.090962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.091391] RIP: 0033:0x7ff89798dd82 [ 33.091722] 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 [ 33.093125] RSP: 002b:00007ffe330aa568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.093728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff89798dd82 [ 33.094278] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff896dc7000 [ 33.094919] RBP: 00007ff896dc7000 R08: 0000000000000009 R09: 0000000000001000 [ 33.095505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558435173ec0 [ 33.096097] R13: 00007ffe330aa580 R14: 00007ffe330aa5b0 R15: 00007ffe330aa910 [ 33.096697] [ 33.096897] [ 33.097046] Allocated by task 213: [ 33.097338] kasan_save_stack+0x22/0x50 [ 33.097685] kasan_set_track+0x25/0x30 [ 33.098024] __kasan_slab_alloc+0x59/0x70 [ 33.098386] kmem_cache_alloc+0x16b/0x370 [ 33.098744] vm_area_dup+0x20/0x160 [ 33.099060] __split_vma+0x170/0x950 [ 33.099377] split_vma+0xc6/0x110 [ 33.099697] mprotect_fixup+0x8d2/0xb30 [ 33.100058] do_mprotect_pkey+0x87e/0xd40 [ 33.100420] __x64_sys_mprotect+0x78/0xc0 [ 33.100785] do_syscall_64+0x3f/0x90 [ 33.101124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.101574] [ 33.101724] Freed by task 213: [ 33.101994] kasan_save_stack+0x22/0x50 [ 33.102342] kasan_set_track+0x25/0x30 [ 33.102696] kasan_save_free_info+0x2b/0x50 [ 33.103073] __kasan_slab_free+0x10a/0x190 [ 33.103439] kmem_cache_free+0x10d/0x4d0 [ 33.103969] rcu_core+0x8c8/0x2860 [ 33.104459] __do_softirq+0x1b7/0x7d4 [ 33.104965] [ 33.105195] Last potentially related work creation: [ 33.105816] kasan_save_stack+0x22/0x50 [ 33.106352] __kasan_record_aux_stack+0x8e/0xa0 [ 33.106959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.107666] remove_vma+0x139/0x170 [ 33.108142] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.108735] do_vmi_munmap+0x1f1/0x2b0 [ 33.109255] __vm_munmap+0x138/0x3a0 [ 33.109753] __x64_sys_munmap+0x59/0x80 [ 33.110277] do_syscall_64+0x3f/0x90 [ 33.110783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.111465] [ 33.111694] The buggy address belongs to the object at ffff888019e6d9f8 [ 33.111694] which belongs to the cache vm_area_struct of size 168 [ 33.113257] The buggy address is located 88 bytes inside of [ 33.113257] freed 168-byte region [ffff888019e6d9f8, ffff888019e6daa0) [ 33.114773] [ 33.115005] The buggy address belongs to the physical page: [ 33.115722] page:00000000683dea19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e6d [ 33.116895] memcg:ffff88800de3cc01 [ 33.117361] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.118054] page_type: 0xffffffff() [ 33.118542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.119517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de3cc01 [ 33.120499] page dumped because: kasan: bad access detected [ 33.121218] [ 33.121453] Memory state around the buggy address: [ 33.122098] ffff888019e6d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.123056] ffff888019e6d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.124024] >ffff888019e6da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.124983] ^ [ 33.125766] ffff888019e6da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.126722] ffff888019e6db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.127696] ================================================================== [ 33.128812] Disabling lock debugging due to kernel taint [ 34.949444] BUG: Bad rss-counter state mm:0000000019577640 type:MM_FILEPAGES val:33 [ 34.950462] BUG: Bad rss-counter state mm:0000000019577640 type:MM_ANONPAGES val:22 [ 35.364946] BUG: Bad rss-counter state mm:00000000e5126b94 type:MM_FILEPAGES val:33 [ 35.366412] BUG: Bad rss-counter state mm:00000000e5126b94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34529' (ECDSA) to the list of known hosts. 2023/06/20 10:13:47 fuzzer started 2023/06/20 10:13:47 dialing manager at localhost:44161 2023/06/20 10:13:47 checking machine... 2023/06/20 10:13:47 checking revisions... [ 36.077194] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:13:47 testing simple program... [ 36.124373] cgroup: Unknown subsys name 'net' [ 36.172471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:45 Registers: info registers vcpu 0 RAX=ffffffff864b115b RBX=0000000000000002 RCX=ffffffff864b1158 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b115a RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff888015cb7ad8 R15=ffff88806ce09a50 RIP=ffffffff811311ed 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 00007f6eb5518900 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=000055eaf1660768 CR3=000000000c82a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=33d766a11531934700000000000ae988 XMM05=72440ad60d050a7f0000000000134f30 XMM06=4fda316b135da52b0000000000133fd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff88801924e840 RCX=1ffff11003249d10 RDX=1ffff11003249d08 RSI=ffffffff818d8c91 RDI=ffff88801924e880 RBP=ffff888009b13680 RSP=ffff888019cbfdf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801924e780 R13=0000000000000009 R14=1ffff11003397fd1 R15=0000000000000000 RIP=ffffffff8450bdca 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 00007f6da5a15900 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=00007ffccb232000 CR3=0000000014666000 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