syzkaller login: [ 30.950912] BUG: Bad rss-counter state mm:00000000af4a730f type:MM_FILEPAGES val:33 [ 30.951940] BUG: Bad rss-counter state mm:00000000af4a730f type:MM_ANONPAGES val:22 [ 31.138820] ================================================================== [ 31.139727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.140667] Read of size 8 at addr ffff888014746880 by task sshd/222 [ 31.141548] [ 31.141765] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.142632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.143682] Call Trace: [ 31.144017] [ 31.144304] dump_stack_lvl+0x91/0xf0 [ 31.144805] print_report+0xcc/0x620 [ 31.145329] ? __virt_addr_valid+0x102/0x340 [ 31.145883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147127] kasan_report+0xbe/0xf0 [ 31.147612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148236] vma_interval_tree_remove+0xc75/0xec0 [ 31.148843] vma_prepare+0xc54/0x11a0 [ 31.149351] __split_vma+0x5af/0x950 [ 31.149824] ? __pfx___split_vma+0x10/0x10 [ 31.150361] ? find_held_lock+0x2c/0x110 [ 31.150887] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.151463] ? lock_is_held_type+0x9f/0x120 [ 31.152007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.152618] ? mtree_range_walk+0x632/0x900 [ 31.153185] ? mas_walk+0x5c7/0x7c0 [ 31.153660] do_vmi_munmap+0x1f1/0x2b0 [ 31.154153] mmap_region+0x1f9/0x2660 [ 31.154645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.155163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.155889] ? __pfx_lock_acquire+0x10/0x10 [ 31.156426] ? __pfx_mmap_region+0x10/0x10 [ 31.156982] ? security_mmap_addr+0x7d/0xa0 [ 31.157524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.158082] do_mmap+0x854/0xf00 [ 31.158523] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.159022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.159587] ksys_mmap_pgoff+0x3af/0x500 [ 31.160095] do_syscall_64+0x3f/0x90 [ 31.160574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161234] RIP: 0033:0x7facfe318d82 [ 31.161689] 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 [ 31.163829] RSP: 002b:00007ffd94cfcda8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.164741] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facfe318d82 [ 31.165597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facfd752000 [ 31.166449] RBP: 00007facfd752000 R08: 0000000000000009 R09: 0000000000001000 [ 31.167308] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae0641cec0 [ 31.168168] R13: 00007ffd94cfcdc0 R14: 00007ffd94cfcdf0 R15: 00007ffd94cfd150 [ 31.169050] [ 31.169347] [ 31.169563] Allocated by task 213: [ 31.169996] kasan_save_stack+0x22/0x50 [ 31.170515] kasan_set_track+0x25/0x30 [ 31.171015] __kasan_slab_alloc+0x59/0x70 [ 31.171553] kmem_cache_alloc+0x16b/0x370 [ 31.172078] vm_area_dup+0x20/0x160 [ 31.172545] __split_vma+0x170/0x950 [ 31.173022] split_vma+0xc6/0x110 [ 31.173473] mprotect_fixup+0x8d2/0xb30 [ 31.173983] do_mprotect_pkey+0x87e/0xd40 [ 31.174508] __x64_sys_mprotect+0x78/0xc0 [ 31.175041] do_syscall_64+0x3f/0x90 [ 31.175521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176178] [ 31.176398] Freed by task 213: [ 31.176803] kasan_save_stack+0x22/0x50 [ 31.177344] kasan_set_track+0x25/0x30 [ 31.177850] kasan_save_free_info+0x2b/0x50 [ 31.178405] __kasan_slab_free+0x10a/0x190 [ 31.178943] kmem_cache_free+0x10d/0x4d0 [ 31.179459] rcu_core+0x8c8/0x2860 [ 31.179913] __do_softirq+0x1b7/0x7d4 [ 31.180399] [ 31.180616] Last potentially related work creation: [ 31.181216] kasan_save_stack+0x22/0x50 [ 31.181722] __kasan_record_aux_stack+0x8e/0xa0 [ 31.182309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.182964] remove_vma+0x139/0x170 [ 31.183425] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.183987] do_vmi_munmap+0x1f1/0x2b0 [ 31.184482] __vm_munmap+0x138/0x3a0 [ 31.184967] __x64_sys_munmap+0x59/0x80 [ 31.185466] do_syscall_64+0x3f/0x90 [ 31.185949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186588] [ 31.186805] Second to last potentially related work creation: [ 31.187495] kasan_save_stack+0x22/0x50 [ 31.188003] __kasan_record_aux_stack+0x8e/0xa0 [ 31.188579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.189240] remove_vma+0x139/0x170 [ 31.189700] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.190268] do_vmi_munmap+0x1f1/0x2b0 [ 31.190764] mmap_region+0x1f9/0x2660 [ 31.191250] do_mmap+0x854/0xf00 [ 31.191684] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.192178] ksys_mmap_pgoff+0x3af/0x500 [ 31.192690] do_syscall_64+0x3f/0x90 [ 31.193180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193834] [ 31.194054] The buggy address belongs to the object at ffff888014746828 [ 31.194054] which belongs to the cache vm_area_struct of size 168 [ 31.195523] The buggy address is located 88 bytes inside of [ 31.195523] freed 168-byte region [ffff888014746828, ffff8880147468d0) [ 31.196976] [ 31.197193] The buggy address belongs to the physical page: [ 31.197855] page:00000000cf350d03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14746 [ 31.198957] memcg:ffff8880197ada01 [ 31.199388] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.200045] page_type: 0xffffffff() [ 31.200500] raw: 0100000000000200 ffff8880087a0c80 ffffea0000252f80 dead000000000006 [ 31.201437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197ada01 [ 31.202355] page dumped because: kasan: bad access detected [ 31.203015] [ 31.203234] Memory state around the buggy address: [ 31.203817] ffff888014746780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.204672] ffff888014746800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.205546] >ffff888014746880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.206408] ^ [ 31.206820] ffff888014746900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.207683] ffff888014746980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.208547] ================================================================== [ 31.209565] Disabling lock debugging due to kernel taint [ 33.350575] BUG: Bad rss-counter state mm:00000000575299e6 type:MM_FILEPAGES val:33 [ 33.351446] BUG: Bad rss-counter state mm:00000000575299e6 type:MM_ANONPAGES val:22 [ 33.797987] BUG: Bad rss-counter state mm:00000000a2f6d03d type:MM_FILEPAGES val:33 [ 33.798577] BUG: Bad rss-counter state mm:00000000a2f6d03d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61751' (ECDSA) to the list of known hosts. 2023/06/20 21:16:44 fuzzer started 2023/06/20 21:16:44 dialing manager at localhost:36067 2023/06/20 21:16:44 checking machine... 2023/06/20 21:16:44 checking revisions... [ 34.410887] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:16:44 testing simple program... [ 34.447370] cgroup: Unknown subsys name 'net' [ 34.507148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:16:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c1a2940 RCX=0000000000000000 RDX=ffff888016c7d1c0 RSI=ffffffff844f8530 RDI=0000000000000007 RBP=ffff88801468f880 RSP=ffff88801468f778 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88800c1a2942 R11=00000000000b6d53 R12=ffff88800c1a2942 R13=dffffc0000000000 R14=0000000000000000 R15=000000000000000c RIP=ffffffff844f855d 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff52556c900 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=00007ff524a8b000 CR3=00000000093a4000 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=00000000000fa7505e5c10884646930b XMM01=000000000011a388b3285ca56c489dff XMM02=000000000011a5a0d59e07bde36eea69 XMM03=000000000011a6c8ec2efd57dc4c00df XMM04=1ec75c3d81af267100000000000ae988 XMM05=520c91ecf34207f30000000000133e10 XMM06=4fda316b135da52b0000000000132c00 XMM07=fb795ef6d65770560000000000121898 XMM08=2c67c8bc2e329bc3000000000011a6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016fd72d8 RSI=ffff888016fd7568 RDI=ffff888016fd72e0 RBP=ffff888008442140 RSP=ffff888016fd7220 R8 =0000000000000001 R9 =ffff888016fd72d0 R10=0000000000038001 R11=0000000000020d03 R12=ffff888016fd72f0 R13=ffff888016fd72d8 R14=ffff888016fd7568 R15=ffff888016fd7290 RIP=ffffffff81131c58 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 00007fdc96258900 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=00007fdc9680f618 CR3=000000001ba10000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000