syzkaller login: [ 31.967483] BUG: Bad rss-counter state mm:00000000ed7cb82b type:MM_FILEPAGES val:33 [ 31.968508] BUG: Bad rss-counter state mm:00000000ed7cb82b type:MM_ANONPAGES val:22 [ 32.135283] ================================================================== [ 32.136293] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.137264] Read of size 8 at addr ffff888015c2a6b0 by task sshd/220 [ 32.138205] [ 32.138424] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.139385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.140433] Call Trace: [ 32.140753] [ 32.141062] dump_stack_lvl+0x91/0xf0 [ 32.141557] print_report+0xcc/0x620 [ 32.142058] ? __virt_addr_valid+0x102/0x340 [ 32.142611] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.143218] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.143846] kasan_report+0xbe/0xf0 [ 32.144319] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.144947] vma_interval_tree_remove+0xc75/0xec0 [ 32.145543] vma_prepare+0xc54/0x11a0 [ 32.146046] __split_vma+0x5af/0x950 [ 32.146523] ? __pfx___split_vma+0x10/0x10 [ 32.147047] ? find_held_lock+0x2c/0x110 [ 32.147563] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.148129] ? lock_is_held_type+0x9f/0x120 [ 32.148669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.149285] ? mtree_range_walk+0x632/0x900 [ 32.149857] ? mas_walk+0x5c7/0x7c0 [ 32.150336] do_vmi_munmap+0x1f1/0x2b0 [ 32.150832] mmap_region+0x1f9/0x2660 [ 32.151319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.151842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.152581] ? __pfx_lock_acquire+0x10/0x10 [ 32.153132] ? __pfx_mmap_region+0x10/0x10 [ 32.153693] ? security_mmap_addr+0x7d/0xa0 [ 32.154243] ? get_unmapped_area+0x1f5/0x3f0 [ 32.154811] do_mmap+0x854/0xf00 [ 32.155263] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.155767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.156343] ksys_mmap_pgoff+0x3af/0x500 [ 32.156861] do_syscall_64+0x3f/0x90 [ 32.157353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.158039] RIP: 0033:0x7fb0bdd74d82 [ 32.158512] 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 [ 32.160716] RSP: 002b:00007ffe63d3e2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.161659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0bdd74d82 [ 32.162537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0bd1ae000 [ 32.163414] RBP: 00007fb0bd1ae000 R08: 0000000000000009 R09: 0000000000001000 [ 32.164289] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f3e3e3ec0 [ 32.165155] R13: 00007ffe63d3e2e0 R14: 00007ffe63d3e310 R15: 00007ffe63d3e670 [ 32.166049] [ 32.166351] [ 32.166569] Allocated by task 213: [ 32.167023] kasan_save_stack+0x22/0x50 [ 32.167545] kasan_set_track+0x25/0x30 [ 32.168057] __kasan_slab_alloc+0x59/0x70 [ 32.168597] kmem_cache_alloc+0x16b/0x370 [ 32.169126] vm_area_dup+0x20/0x160 [ 32.169614] __split_vma+0x170/0x950 [ 32.170100] split_vma+0xc6/0x110 [ 32.170550] mprotect_fixup+0x8d2/0xb30 [ 32.171071] do_mprotect_pkey+0x87e/0xd40 [ 32.171608] __x64_sys_mprotect+0x78/0xc0 [ 32.172140] do_syscall_64+0x3f/0x90 [ 32.172638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.173298] [ 32.173519] Freed by task 210: [ 32.173941] kasan_save_stack+0x22/0x50 [ 32.174458] kasan_set_track+0x25/0x30 [ 32.174971] kasan_save_free_info+0x2b/0x50 [ 32.175519] __kasan_slab_free+0x10a/0x190 [ 32.176070] kmem_cache_free+0x10d/0x4d0 [ 32.176596] rcu_core+0x8c8/0x2860 [ 32.177053] __do_softirq+0x1b7/0x7d4 [ 32.177531] [ 32.177775] Last potentially related work creation: [ 32.178371] kasan_save_stack+0x22/0x50 [ 32.178889] __kasan_record_aux_stack+0x8e/0xa0 [ 32.179480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.180137] remove_vma+0x139/0x170 [ 32.180669] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.181238] do_vmi_munmap+0x1f1/0x2b0 [ 32.181747] __vm_munmap+0x138/0x3a0 [ 32.182227] __x64_sys_munmap+0x59/0x80 [ 32.182733] do_syscall_64+0x3f/0x90 [ 32.183223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.183886] [ 32.184103] The buggy address belongs to the object at ffff888015c2a658 [ 32.184103] which belongs to the cache vm_area_struct of size 168 [ 32.185652] The buggy address is located 88 bytes inside of [ 32.185652] freed 168-byte region [ffff888015c2a658, ffff888015c2a700) [ 32.187116] [ 32.187339] The buggy address belongs to the physical page: [ 32.188019] page:00000000c38c2c91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c2a [ 32.189160] memcg:ffff8880184f2b01 [ 32.189604] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.190282] page_type: 0xffffffff() [ 32.190740] raw: 0100000000000200 ffff88800879fc80 ffffea0000313f00 dead000000000004 [ 32.191691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880184f2b01 [ 32.192618] page dumped because: kasan: bad access detected [ 32.193306] [ 32.193532] Memory state around the buggy address: [ 32.194139] ffff888015c2a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.195019] ffff888015c2a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.195902] >ffff888015c2a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.196784] ^ [ 32.197385] ffff888015c2a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.198292] ffff888015c2a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.199166] ================================================================== [ 32.200169] Disabling lock debugging due to kernel taint [ 34.208152] BUG: Bad rss-counter state mm:00000000f817d866 type:MM_FILEPAGES val:33 [ 34.208989] BUG: Bad rss-counter state mm:00000000f817d866 type:MM_ANONPAGES val:22 [ 34.693573] BUG: Bad rss-counter state mm:0000000002d1b85b type:MM_FILEPAGES val:33 [ 34.694820] BUG: Bad rss-counter state mm:0000000002d1b85b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2767' (ECDSA) to the list of known hosts. 2023/06/19 21:27:49 fuzzer started 2023/06/19 21:27:49 dialing manager at localhost:44161 2023/06/19 21:27:49 checking machine... 2023/06/19 21:27:49 checking revisions... [ 35.338824] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:27:49 testing simple program... [ 35.395334] cgroup: Unknown subsys name 'net' [ 35.455777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:47 Registers: info registers vcpu 0 RAX=ffffffff810a48a0 RBX=000000000000e3d2 RCX=0000000000000000 RDX=ffff88801a01b680 RSI=ffffffff813c9c14 RDI=ffffffff85497f20 RBP=ffff888016d4f8c0 RSP=ffff888016d4f838 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000006490c855 R13=dffffc0000000000 R14=1ffff11002da9f18 R15=dffffc0000000000 RIP=ffffffff810a48a4 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 00007fbdd1629900 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=00007ffef1474000 CR3=000000000ede6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f7624c4ab50 CR3=000000000d874000 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=38f682090794afae7c48f5cb64ce8254 XMM02=2c67c8bc2e329bc3000000000011f118 XMM03=fb795ef6d657705600000000001238b8 XMM04=5331605670303b5a00000000000ae988 XMM05=bfca6ef9e7f5165000000000001341f8 XMM06=4fda316b135da52b0000000000133298 XMM07=e042d86d42eb936e0000000000123b38 XMM08=527e7dde51394787000000000011f178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000