syzkaller login: [ 30.925958] BUG: Bad rss-counter state mm:00000000c491d6d0 type:MM_FILEPAGES val:33 [ 30.926985] BUG: Bad rss-counter state mm:00000000c491d6d0 type:MM_ANONPAGES val:22 [ 31.093019] ================================================================== [ 31.093918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.094869] Read of size 8 at addr ffff888019f4bc20 by task sshd/220 [ 31.095654] [ 31.096068] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.097088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.098250] Call Trace: [ 31.098626] [ 31.098966] dump_stack_lvl+0x91/0xf0 [ 31.099563] print_report+0xcc/0x620 [ 31.100137] ? __virt_addr_valid+0x102/0x340 [ 31.100786] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.102230] kasan_report+0xbe/0xf0 [ 31.102794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.103540] vma_interval_tree_remove+0xc75/0xec0 [ 31.104251] vma_prepare+0xc54/0x11a0 [ 31.104821] __split_vma+0x5af/0x950 [ 31.105388] ? __pfx___split_vma+0x10/0x10 [ 31.106015] ? find_held_lock+0x2c/0x110 [ 31.106629] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.107330] ? lock_is_held_type+0x9f/0x120 [ 31.107942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.108552] ? mtree_range_walk+0x632/0x900 [ 31.109114] ? mas_walk+0x5c7/0x7c0 [ 31.109594] do_vmi_munmap+0x1f1/0x2b0 [ 31.110080] mmap_region+0x1f9/0x2660 [ 31.110562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.111068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.111796] ? __pfx_lock_acquire+0x10/0x10 [ 31.112332] ? __pfx_mmap_region+0x10/0x10 [ 31.112859] ? security_mmap_addr+0x7d/0xa0 [ 31.113381] ? get_unmapped_area+0x1f5/0x3f0 [ 31.113922] do_mmap+0x854/0xf00 [ 31.114358] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.114849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.115415] ksys_mmap_pgoff+0x3af/0x500 [ 31.115915] do_syscall_64+0x3f/0x90 [ 31.116392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.117034] RIP: 0033:0x7f2db0d07d82 [ 31.117486] 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 [ 31.119629] RSP: 002b:00007fff1cc42cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.120529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2db0d07d82 [ 31.121372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2db0141000 [ 31.122211] RBP: 00007f2db0141000 R08: 0000000000000009 R09: 0000000000001000 [ 31.123055] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ef6167f70 [ 31.123907] R13: 00007fff1cc42d10 R14: 00007fff1cc42d40 R15: 00007fff1cc430a0 [ 31.124766] [ 31.125056] [ 31.125271] Allocated by task 213: [ 31.125699] kasan_save_stack+0x22/0x50 [ 31.126203] kasan_set_track+0x25/0x30 [ 31.126688] __kasan_slab_alloc+0x59/0x70 [ 31.127227] kmem_cache_alloc+0x16b/0x370 [ 31.127737] vm_area_dup+0x20/0x160 [ 31.128184] __split_vma+0x170/0x950 [ 31.128648] split_vma+0xc6/0x110 [ 31.129082] mprotect_fixup+0x8d2/0xb30 [ 31.129582] do_mprotect_pkey+0x87e/0xd40 [ 31.130096] __x64_sys_mprotect+0x78/0xc0 [ 31.130613] do_syscall_64+0x3f/0x90 [ 31.131108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131756] [ 31.131970] Freed by task 210: [ 31.132360] kasan_save_stack+0x22/0x50 [ 31.132864] kasan_set_track+0x25/0x30 [ 31.133353] kasan_save_free_info+0x2b/0x50 [ 31.133886] __kasan_slab_free+0x10a/0x190 [ 31.134411] kmem_cache_free+0x10d/0x4d0 [ 31.134914] rcu_core+0x8c8/0x2860 [ 31.135371] __do_softirq+0x1b7/0x7d4 [ 31.135847] [ 31.136061] Last potentially related work creation: [ 31.136643] kasan_save_stack+0x22/0x50 [ 31.137140] __kasan_record_aux_stack+0x8e/0xa0 [ 31.137783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.138423] remove_vma+0x139/0x170 [ 31.138877] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.139449] do_vmi_munmap+0x1f1/0x2b0 [ 31.139933] __vm_munmap+0x138/0x3a0 [ 31.140400] __x64_sys_munmap+0x59/0x80 [ 31.140890] do_syscall_64+0x3f/0x90 [ 31.141365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.142009] [ 31.142223] The buggy address belongs to the object at ffff888019f4bbc8 [ 31.142223] which belongs to the cache vm_area_struct of size 168 [ 31.143687] The buggy address is located 88 bytes inside of [ 31.143687] freed 168-byte region [ffff888019f4bbc8, ffff888019f4bc70) [ 31.145084] [ 31.145299] The buggy address belongs to the physical page: [ 31.145957] page:00000000a6e4411b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f4b [ 31.147041] memcg:ffff888015940701 [ 31.147473] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.148109] page_type: 0xffffffff() [ 31.148555] raw: 0100000000000200 ffff8880087a0c80 ffffea000067a2c0 dead000000000002 [ 31.149472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015940701 [ 31.150375] page dumped because: kasan: bad access detected [ 31.151035] [ 31.151268] Memory state around the buggy address: [ 31.151839] ffff888019f4bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.152686] ffff888019f4bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.153536] >ffff888019f4bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.154376] ^ [ 31.154906] ffff888019f4bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.155766] ffff888019f4bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.156609] ================================================================== [ 31.157509] Disabling lock debugging due to kernel taint [ 33.133129] BUG: Bad rss-counter state mm:00000000ba86987c type:MM_FILEPAGES val:33 [ 33.134136] BUG: Bad rss-counter state mm:00000000ba86987c type:MM_ANONPAGES val:22 [ 33.595177] BUG: Bad rss-counter state mm:00000000bea7ccd9 type:MM_FILEPAGES val:33 [ 33.595923] BUG: Bad rss-counter state mm:00000000bea7ccd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22048' (ECDSA) to the list of known hosts. 2023/06/20 18:49:42 fuzzer started 2023/06/20 18:49:42 dialing manager at localhost:36067 2023/06/20 18:49:42 checking machine... 2023/06/20 18:49:42 checking revisions... [ 34.237266] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:49:43 testing simple program... [ 34.278688] cgroup: Unknown subsys name 'net' [ 34.313434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:49:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=1ffffffff0a58f20 RSI=ffffffff813bcfd9 RDI=0000000000000007 RBP=ffff88806ce09dc8 RSP=ffff88806ce09d88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000039500 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8124f5fc RFL=00000046 [---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 00007f7ed69ed900 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=00007f7ed6fa50b0 CR3=0000000015818000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f9f15bb9100 CR3=0000000014794000 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=2032343a39343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000