syzkaller login: [ 31.121636] BUG: Bad rss-counter state mm:00000000dca95f69 type:MM_FILEPAGES val:33 [ 31.122912] BUG: Bad rss-counter state mm:00000000dca95f69 type:MM_ANONPAGES val:22 [ 31.158406] ================================================================== [ 31.159743] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.161171] Read of size 8 at addr ffff88800e6ee058 by task sshd/218 [ 31.162242] [ 31.162501] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.163803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.165032] Call Trace: [ 31.165425] [ 31.165773] dump_stack_lvl+0x91/0xf0 [ 31.166372] print_report+0xcc/0x620 [ 31.166965] ? __virt_addr_valid+0x102/0x340 [ 31.167650] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168411] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169173] kasan_report+0xbe/0xf0 [ 31.169747] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170511] vma_interval_tree_remove+0xc75/0xec0 [ 31.171245] vma_prepare+0xc54/0x11a0 [ 31.171829] __split_vma+0x5af/0x950 [ 31.172404] ? __pfx___split_vma+0x10/0x10 [ 31.173056] ? find_held_lock+0x2c/0x110 [ 31.173686] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.174391] ? lock_is_held_type+0x9f/0x120 [ 31.175047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.175690] ? mtree_range_walk+0x632/0x900 [ 31.176220] ? mas_walk+0x5c7/0x7c0 [ 31.176697] do_vmi_munmap+0x1f1/0x2b0 [ 31.177162] mmap_region+0x1f9/0x2660 [ 31.177617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.178103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.178784] ? __pfx_lock_acquire+0x10/0x10 [ 31.179288] ? __pfx_mmap_region+0x10/0x10 [ 31.179789] ? security_mmap_addr+0x7d/0xa0 [ 31.180291] ? get_unmapped_area+0x1f5/0x3f0 [ 31.180835] do_mmap+0x854/0xf00 [ 31.181256] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.181725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.182260] ksys_mmap_pgoff+0x3af/0x500 [ 31.182740] do_syscall_64+0x3f/0x90 [ 31.183194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183806] RIP: 0033:0x7f3c9dcd8d82 [ 31.184236] 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 [ 31.186330] RSP: 002b:00007fffc79ba318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c9dcd8d82 [ 31.188232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c9d112000 [ 31.189067] RBP: 00007f3c9d112000 R08: 0000000000000009 R09: 0000000000001000 [ 31.189895] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559df72cb20 [ 31.190738] R13: 00007fffc79ba330 R14: 00007fffc79ba360 R15: 00007fffc79ba6c0 [ 31.191581] [ 31.191862] [ 31.192071] Allocated by task 211: [ 31.192504] kasan_save_stack+0x22/0x50 [ 31.193001] kasan_set_track+0x25/0x30 [ 31.193486] __kasan_slab_alloc+0x59/0x70 [ 31.194000] kmem_cache_alloc+0x16b/0x370 [ 31.194502] vm_area_dup+0x20/0x160 [ 31.194955] __split_vma+0x170/0x950 [ 31.195421] split_vma+0xc6/0x110 [ 31.195862] mprotect_fixup+0x8d2/0xb30 [ 31.196353] do_mprotect_pkey+0x87e/0xd40 [ 31.196895] __x64_sys_mprotect+0x78/0xc0 [ 31.197410] do_syscall_64+0x3f/0x90 [ 31.197886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198520] [ 31.198737] Freed by task 211: [ 31.199131] kasan_save_stack+0x22/0x50 [ 31.199618] kasan_set_track+0x25/0x30 [ 31.200110] kasan_save_free_info+0x2b/0x50 [ 31.200676] __kasan_slab_free+0x10a/0x190 [ 31.201214] kmem_cache_free+0x10d/0x4d0 [ 31.201728] rcu_core+0x8c8/0x2860 [ 31.202181] __do_softirq+0x1b7/0x7d4 [ 31.202659] [ 31.202875] Last potentially related work creation: [ 31.203470] kasan_save_stack+0x22/0x50 [ 31.203987] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205228] remove_vma+0x139/0x170 [ 31.205688] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206257] do_vmi_munmap+0x1f1/0x2b0 [ 31.206740] __vm_munmap+0x138/0x3a0 [ 31.207212] __x64_sys_munmap+0x59/0x80 [ 31.207711] do_syscall_64+0x3f/0x90 [ 31.208201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208851] [ 31.209066] Second to last potentially related work creation: [ 31.209746] kasan_save_stack+0x22/0x50 [ 31.210248] __kasan_record_aux_stack+0x8e/0xa0 [ 31.210819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.211462] remove_vma+0x139/0x170 [ 31.211920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.212492] do_vmi_munmap+0x1f1/0x2b0 [ 31.212985] mmap_region+0x1f9/0x2660 [ 31.213467] do_mmap+0x854/0xf00 [ 31.213902] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214388] ksys_mmap_pgoff+0x3af/0x500 [ 31.214895] do_syscall_64+0x3f/0x90 [ 31.215377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216024] [ 31.216237] The buggy address belongs to the object at ffff88800e6ee000 [ 31.216237] which belongs to the cache vm_area_struct of size 168 [ 31.217711] The buggy address is located 88 bytes inside of [ 31.217711] freed 168-byte region [ffff88800e6ee000, ffff88800e6ee0a8) [ 31.219111] [ 31.219327] The buggy address belongs to the physical page: [ 31.219982] page:00000000bc1b7719 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ee [ 31.221077] memcg:ffff88800d8cbc01 [ 31.221511] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.222155] page_type: 0xffffffff() [ 31.222608] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.223521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8cbc01 [ 31.224430] page dumped because: kasan: bad access detected [ 31.225109] [ 31.225326] Memory state around the buggy address: [ 31.225908] ffff88800e6edf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.226763] ffff88800e6edf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.227618] >ffff88800e6ee000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228489] ^ [ 31.229226] ffff88800e6ee080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.230124] ffff88800e6ee100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.230973] ================================================================== [ 31.231920] Disabling lock debugging due to kernel taint [ 33.846740] BUG: Bad rss-counter state mm:00000000bad6f991 type:MM_FILEPAGES val:33 [ 33.847570] BUG: Bad rss-counter state mm:00000000bad6f991 type:MM_ANONPAGES val:22 [ 34.358945] BUG: Bad rss-counter state mm:00000000b6d35245 type:MM_FILEPAGES val:33 [ 34.360150] BUG: Bad rss-counter state mm:00000000b6d35245 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21408' (ECDSA) to the list of known hosts. 2023/06/20 21:32:08 fuzzer started 2023/06/20 21:32:08 dialing manager at localhost:36067 2023/06/20 21:32:08 checking machine... 2023/06/20 21:32:08 checking revisions... [ 35.047705] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:32:08 testing simple program... [ 35.101000] cgroup: Unknown subsys name 'net' [ 35.141253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f45e2c47000 CR3=000000000c932000 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=9a337d256b4c3698c54264e072dd83c0 XMM02=ec2efd57dc4c00df000000000011c448 XMM03=f6cd5608332438f3000000000011c518 XMM04=a0fb1070664f0ade00000000000ae988 XMM05=44822065c81b60420000000000133e48 XMM06=bdf2e299e47b49d500000000001334d0 XMM07=e042d86d42eb936e00000000001229b8 XMM08=f6cd5608332438f3000000000011c518 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d825b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c1b04b RBP=ffff888018fe7880 RSP=ffff888018fe77b8 R8 =ffffffff860d825a R9 =ffff888018fe7868 R10=0000000000038001 R11=0000000000010b8d R12=ffff888018fe7888 R13=ffff888018fe7870 R14=ffff888018fe7869 R15=ffff888018fe7828 RIP=ffffffff81130aa8 RFL=00000216 [----AP-] 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 00007f1823d06900 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=00007ffed7e5f000 CR3=000000000e696000 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=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