syzkaller login: [ 32.108974] BUG: Bad rss-counter state mm:00000000c9eed5d3 type:MM_FILEPAGES val:33 [ 32.110151] BUG: Bad rss-counter state mm:00000000c9eed5d3 type:MM_ANONPAGES val:22 [ 32.149140] ================================================================== [ 32.149851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.150619] Read of size 8 at addr ffff88800cf67a50 by task sshd/221 [ 32.151274] [ 32.151481] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.152179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.152923] Call Trace: [ 32.153170] [ 32.153386] dump_stack_lvl+0x91/0xf0 [ 32.153849] print_report+0xcc/0x620 [ 32.154222] ? __virt_addr_valid+0x102/0x340 [ 32.154642] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.155114] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.155594] kasan_report+0xbe/0xf0 [ 32.155956] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156438] vma_interval_tree_remove+0xc75/0xec0 [ 32.156902] vma_prepare+0xc54/0x11a0 [ 32.157271] __split_vma+0x5af/0x950 [ 32.157638] ? __pfx___split_vma+0x10/0x10 [ 32.158041] ? find_held_lock+0x2c/0x110 [ 32.158437] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.158865] ? lock_is_held_type+0x9f/0x120 [ 32.159280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.159763] ? mtree_range_walk+0x632/0x900 [ 32.160183] ? mas_walk+0x5c7/0x7c0 [ 32.160506] do_vmi_munmap+0x1f1/0x2b0 [ 32.160854] mmap_region+0x1f9/0x2660 [ 32.161185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.161535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.162037] ? __pfx_lock_acquire+0x10/0x10 [ 32.162406] ? __pfx_mmap_region+0x10/0x10 [ 32.162771] ? security_mmap_addr+0x7d/0xa0 [ 32.163131] ? get_unmapped_area+0x1f5/0x3f0 [ 32.163517] do_mmap+0x854/0xf00 [ 32.163826] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.164171] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.164558] ksys_mmap_pgoff+0x3af/0x500 [ 32.164907] do_syscall_64+0x3f/0x90 [ 32.165237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.165685] RIP: 0033:0x7f7b13a13d82 [ 32.165998] 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 [ 32.167477] RSP: 002b:00007ffeeab48528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.168162] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b13a13d82 [ 32.168741] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b12e4d000 [ 32.169332] RBP: 00007f7b12e4d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.169924] R10: 0000000000000812 R11: 0000000000000206 R12: 000056054d093d90 [ 32.170516] R13: 00007ffeeab48540 R14: 00007ffeeab48570 R15: 00007ffeeab488d0 [ 32.171112] [ 32.171312] [ 32.171481] Allocated by task 214: [ 32.171786] kasan_save_stack+0x22/0x50 [ 32.172143] kasan_set_track+0x25/0x30 [ 32.172486] __kasan_slab_alloc+0x59/0x70 [ 32.172846] kmem_cache_alloc+0x16b/0x370 [ 32.173202] vm_area_dup+0x20/0x160 [ 32.173517] __split_vma+0x170/0x950 [ 32.173845] split_vma+0xc6/0x110 [ 32.174147] mprotect_fixup+0x8d2/0xb30 [ 32.174495] do_mprotect_pkey+0x87e/0xd40 [ 32.174856] __x64_sys_mprotect+0x78/0xc0 [ 32.175218] do_syscall_64+0x3f/0x90 [ 32.175549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.175996] [ 32.176148] Freed by task 214: [ 32.176425] kasan_save_stack+0x22/0x50 [ 32.176773] kasan_set_track+0x25/0x30 [ 32.177110] kasan_save_free_info+0x2b/0x50 [ 32.177482] __kasan_slab_free+0x10a/0x190 [ 32.177853] kmem_cache_free+0x10d/0x4d0 [ 32.178210] rcu_core+0x8c8/0x2860 [ 32.178522] __do_softirq+0x1b7/0x7d4 [ 32.178847] [ 32.178995] Last potentially related work creation: [ 32.179413] kasan_save_stack+0x22/0x50 [ 32.179766] __kasan_record_aux_stack+0x8e/0xa0 [ 32.180163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.180608] remove_vma+0x139/0x170 [ 32.180921] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.181309] do_vmi_munmap+0x1f1/0x2b0 [ 32.181647] __vm_munmap+0x138/0x3a0 [ 32.181969] __x64_sys_munmap+0x59/0x80 [ 32.182313] do_syscall_64+0x3f/0x90 [ 32.182641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.183088] [ 32.183236] Second to last potentially related work creation: [ 32.183735] kasan_save_stack+0x22/0x50 [ 32.184088] __kasan_record_aux_stack+0x8e/0xa0 [ 32.184481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.184927] remove_vma+0x139/0x170 [ 32.185242] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.185632] do_vmi_munmap+0x1f1/0x2b0 [ 32.185975] mmap_region+0x1f9/0x2660 [ 32.186307] do_mmap+0x854/0xf00 [ 32.186606] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.186947] ksys_mmap_pgoff+0x3af/0x500 [ 32.187291] do_syscall_64+0x3f/0x90 [ 32.187624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.188071] [ 32.188220] The buggy address belongs to the object at ffff88800cf679f8 [ 32.188220] which belongs to the cache vm_area_struct of size 168 [ 32.189235] The buggy address is located 88 bytes inside of [ 32.189235] freed 168-byte region [ffff88800cf679f8, ffff88800cf67aa0) [ 32.190207] [ 32.190354] The buggy address belongs to the physical page: [ 32.190810] page:00000000e810cacc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf67 [ 32.191576] memcg:ffff88800d659501 [ 32.191879] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.192370] page_type: 0xffffffff() [ 32.192683] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.193323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d659501 [ 32.193962] page dumped because: kasan: bad access detected [ 32.194428] [ 32.194575] Memory state around the buggy address: [ 32.195019] ffff88800cf67900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.195653] ffff88800cf67980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.196254] >ffff88800cf67a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.196844] ^ [ 32.197333] ffff88800cf67a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.197933] ffff88800cf67b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.198542] ================================================================== [ 32.199173] Disabling lock debugging due to kernel taint [ 33.991100] BUG: Bad rss-counter state mm:000000004f37b3f9 type:MM_FILEPAGES val:33 [ 33.992122] BUG: Bad rss-counter state mm:000000004f37b3f9 type:MM_ANONPAGES val:22 [ 34.545586] BUG: Bad rss-counter state mm:00000000096f04cc type:MM_FILEPAGES val:33 [ 34.546796] BUG: Bad rss-counter state mm:00000000096f04cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45158' (ECDSA) to the list of known hosts. 2023/06/19 15:52:33 fuzzer started 2023/06/19 15:52:34 dialing manager at localhost:44161 2023/06/19 15:52:34 checking machine... 2023/06/19 15:52:34 checking revisions... [ 35.139052] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:52:34 testing simple program... [ 35.180638] cgroup: Unknown subsys name 'net' [ 35.224489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801653f7c0 RCX=0000000000000001 RDX=1ffff11002ca7f0b RSI=ffffffff818a83a8 RDI=ffff88801653f7cc RBP=ffff88801653f858 RSP=ffff88801653f6d8 R8 =0000000000000001 R9 =ffff88801653f738 R10=0000000000038001 R11=00000000000229c7 R12=ffff88801653f7c0 R13=0000000000000000 R14=ffff888019501b40 R15=0000000000000dc0 RIP=ffffffff813ad4f7 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 00007f3375777900 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=00007ffc089df000 CR3=000000000ca9c000 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=0000000000000001 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=00007fa5e1648060 CR3=000000000cb3c000 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=e8f913a28fd39d98f441bfd4103aae1f XMM02=ec2efd57dc4c00df000000000011d900 XMM03=c2114ec574fefd89000000000011d9d0 XMM04=129fa1fb63fb24d600000000000ae988 XMM05=e4cb8bb95a7664b60000000000135558 XMM06=82b06e190d11356200000000001343c0 XMM07=e042d86d42eb936e00000000001248e0 XMM08=c2114ec574fefd89000000000011d9d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000