syzkaller login: [ 30.981399] BUG: Bad rss-counter state mm:00000000f37ae9ce type:MM_FILEPAGES val:33 [ 30.982861] BUG: Bad rss-counter state mm:00000000f37ae9ce type:MM_ANONPAGES val:22 [ 31.130444] ================================================================== [ 31.131333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.132234] Read of size 8 at addr ffff88801a317140 by task sshd/220 [ 31.132981] [ 31.133278] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.134116] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.135069] Call Trace: [ 31.135398] [ 31.135686] dump_stack_lvl+0x91/0xf0 [ 31.136155] print_report+0xcc/0x620 [ 31.136626] ? __virt_addr_valid+0x102/0x340 [ 31.137159] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.137775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.138373] kasan_report+0xbe/0xf0 [ 31.138847] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139438] vma_interval_tree_remove+0xc75/0xec0 [ 31.140030] vma_prepare+0xc54/0x11a0 [ 31.140518] __split_vma+0x5af/0x950 [ 31.141006] ? __pfx___split_vma+0x10/0x10 [ 31.141540] ? find_held_lock+0x2c/0x110 [ 31.142085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.142679] ? lock_is_held_type+0x9f/0x120 [ 31.143233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.143849] ? mtree_range_walk+0x632/0x900 [ 31.144405] ? mas_walk+0x5c7/0x7c0 [ 31.144912] do_vmi_munmap+0x1f1/0x2b0 [ 31.145410] mmap_region+0x1f9/0x2660 [ 31.145909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.146444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.147204] ? __pfx_lock_acquire+0x10/0x10 [ 31.147776] ? __pfx_mmap_region+0x10/0x10 [ 31.148321] ? security_mmap_addr+0x7d/0xa0 [ 31.148904] ? get_unmapped_area+0x1f5/0x3f0 [ 31.149460] do_mmap+0x854/0xf00 [ 31.149918] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.150438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151028] ksys_mmap_pgoff+0x3af/0x500 [ 31.151545] do_syscall_64+0x3f/0x90 [ 31.152065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152724] RIP: 0033:0x7feee4d01d82 [ 31.153185] 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 [ 31.155393] RSP: 002b:00007ffde8b2b708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.156340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feee4d01d82 [ 31.157210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feee413b000 [ 31.158081] RBP: 00007feee413b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.158959] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fc6a28ec0 [ 31.159838] R13: 00007ffde8b2b720 R14: 00007ffde8b2b750 R15: 00007ffde8b2bab0 [ 31.160728] [ 31.161024] [ 31.161244] Allocated by task 213: [ 31.161695] kasan_save_stack+0x22/0x50 [ 31.162218] kasan_set_track+0x25/0x30 [ 31.162728] __kasan_slab_alloc+0x59/0x70 [ 31.163255] kmem_cache_alloc+0x16b/0x370 [ 31.163808] vm_area_dup+0x20/0x160 [ 31.164266] __split_vma+0x170/0x950 [ 31.164751] split_vma+0xc6/0x110 [ 31.165195] mprotect_fixup+0x8d2/0xb30 [ 31.165707] do_mprotect_pkey+0x87e/0xd40 [ 31.166331] __x64_sys_mprotect+0x78/0xc0 [ 31.167059] do_syscall_64+0x3f/0x90 [ 31.167714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168598] [ 31.168897] Freed by task 213: [ 31.169431] kasan_save_stack+0x22/0x50 [ 31.170120] kasan_set_track+0x25/0x30 [ 31.170815] kasan_save_free_info+0x2b/0x50 [ 31.171535] __kasan_slab_free+0x10a/0x190 [ 31.172257] kmem_cache_free+0x10d/0x4d0 [ 31.172916] rcu_core+0x8c8/0x2860 [ 31.173374] __do_softirq+0x1b7/0x7d4 [ 31.173869] [ 31.174091] Last potentially related work creation: [ 31.174715] kasan_save_stack+0x22/0x50 [ 31.175224] __kasan_record_aux_stack+0x8e/0xa0 [ 31.175810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.176464] remove_vma+0x139/0x170 [ 31.176960] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.177516] do_vmi_munmap+0x1f1/0x2b0 [ 31.178029] __vm_munmap+0x138/0x3a0 [ 31.178516] __x64_sys_munmap+0x59/0x80 [ 31.179031] do_syscall_64+0x3f/0x90 [ 31.179504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.180163] [ 31.180385] The buggy address belongs to the object at ffff88801a3170e8 [ 31.180385] which belongs to the cache vm_area_struct of size 168 [ 31.181908] The buggy address is located 88 bytes inside of [ 31.181908] freed 168-byte region [ffff88801a3170e8, ffff88801a317190) [ 31.183359] [ 31.183578] The buggy address belongs to the physical page: [ 31.184262] page:00000000739e3f36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a317 [ 31.185392] memcg:ffff888019e94b01 [ 31.185857] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.186530] page_type: 0xffffffff() [ 31.187018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.187937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e94b01 [ 31.188867] page dumped because: kasan: bad access detected [ 31.189530] [ 31.189764] Memory state around the buggy address: [ 31.190369] ffff88801a317000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.191278] ffff88801a317080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.192142] >ffff88801a317100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.193002] ^ [ 31.193658] ffff88801a317180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.194540] ffff88801a317200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.195427] ================================================================== [ 31.196425] Disabling lock debugging due to kernel taint [ 33.144802] BUG: Bad rss-counter state mm:000000006951aeb7 type:MM_FILEPAGES val:33 [ 33.145972] BUG: Bad rss-counter state mm:000000006951aeb7 type:MM_ANONPAGES val:22 [ 33.630589] BUG: Bad rss-counter state mm:000000008ce67150 type:MM_FILEPAGES val:33 [ 33.631765] BUG: Bad rss-counter state mm:000000008ce67150 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29956' (ECDSA) to the list of known hosts. 2023/06/20 18:23:00 fuzzer started 2023/06/20 18:23:00 dialing manager at localhost:36067 2023/06/20 18:23:00 checking machine... 2023/06/20 18:23:00 checking revisions... [ 34.294486] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:23:00 testing simple program... [ 34.344491] cgroup: Unknown subsys name 'net' [ 34.425193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000010 RCX=ffffffff844a504f RDX=ffff888016ad1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880168be808 RSP=ffff88801a29fce0 R8 =0000000000000000 R9 =0000000000000002 R10=0000000000000005 R11=0000000000000000 R12=0000000000000002 R13=0000000000000005 R14=00007f81510e701c R15=00007f81510d6fff RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8151133900 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=00007f81510e701c CR3=000000001bc00000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801582fa78 RCX=0000000000000001 RDX=1ffff11002b05f65 RSI=ffffffff846000aa RDI=ffff88801582fa84 RBP=ffff88801582fb28 RSP=ffff88801582f990 R8 =0000000000000001 R9 =ffff88801582f9f0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801582fa78 R13=0000000000000000 R14=ffff88800f703680 R15=dffffc0000000000 RIP=ffffffff813ad543 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 00007ff206d12900 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=00007ff20612ccb8 CR3=000000000d970000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e9b0cbc65b6cf5de00000000000ae988 XMM05=087ea5436e41a5af0000000000132338 XMM06=19e9129bd510f23500000000001311d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000