syzkaller login: [ 34.935014] BUG: Bad rss-counter state mm:00000000de8b47cc type:MM_FILEPAGES val:33 [ 34.936207] BUG: Bad rss-counter state mm:00000000de8b47cc type:MM_ANONPAGES val:22 [ 35.124920] ================================================================== [ 35.126018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.127150] Read of size 8 at addr ffff88800c54d6b0 by task sshd/220 [ 35.128164] [ 35.128479] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.129559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.130756] Call Trace: [ 35.131136] [ 35.131473] dump_stack_lvl+0x91/0xf0 [ 35.132052] print_report+0xcc/0x620 [ 35.132633] ? __virt_addr_valid+0x102/0x340 [ 35.133299] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.134060] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.134794] kasan_report+0xbe/0xf0 [ 35.135362] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.136101] vma_interval_tree_remove+0xc75/0xec0 [ 35.136819] vma_prepare+0xc54/0x11a0 [ 35.137396] __split_vma+0x5af/0x950 [ 35.137955] ? __pfx___split_vma+0x10/0x10 [ 35.138584] ? find_held_lock+0x2c/0x110 [ 35.139200] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.139870] ? lock_is_held_type+0x9f/0x120 [ 35.140517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.141237] ? mtree_range_walk+0x632/0x900 [ 35.141931] ? mas_walk+0x5c7/0x7c0 [ 35.142495] do_vmi_munmap+0x1f1/0x2b0 [ 35.143081] mmap_region+0x1f9/0x2660 [ 35.143657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.144262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.145121] ? __pfx_lock_acquire+0x10/0x10 [ 35.145774] ? __pfx_mmap_region+0x10/0x10 [ 35.146396] ? security_mmap_addr+0x7d/0xa0 [ 35.147026] ? get_unmapped_area+0x1f5/0x3f0 [ 35.147688] do_mmap+0x854/0xf00 [ 35.148203] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.148800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.149472] ksys_mmap_pgoff+0x3af/0x500 [ 35.150071] do_syscall_64+0x3f/0x90 [ 35.150642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.151409] RIP: 0033:0x7f736b775d82 [ 35.151952] 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 [ 35.154542] RSP: 002b:00007ffcaae9a478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.155641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f736b775d82 [ 35.156670] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f736abaf000 [ 35.157717] RBP: 00007f736abaf000 R08: 0000000000000009 R09: 0000000000001000 [ 35.158734] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c30bfdec0 [ 35.159743] R13: 00007ffcaae9a490 R14: 00007ffcaae9a4c0 R15: 00007ffcaae9a820 [ 35.160761] [ 35.161102] [ 35.161378] Allocated by task 213: [ 35.161892] kasan_save_stack+0x22/0x50 [ 35.162490] kasan_set_track+0x25/0x30 [ 35.163078] __kasan_slab_alloc+0x59/0x70 [ 35.163698] kmem_cache_alloc+0x16b/0x370 [ 35.164310] vm_area_dup+0x20/0x160 [ 35.164854] __split_vma+0x170/0x950 [ 35.165433] split_vma+0xc6/0x110 [ 35.165956] mprotect_fixup+0x8d2/0xb30 [ 35.166554] do_mprotect_pkey+0x87e/0xd40 [ 35.167171] __x64_sys_mprotect+0x78/0xc0 [ 35.167799] do_syscall_64+0x3f/0x90 [ 35.168365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.169011] [ 35.169221] Freed by task 213: [ 35.169610] kasan_save_stack+0x22/0x50 [ 35.170156] kasan_set_track+0x25/0x30 [ 35.170624] kasan_save_free_info+0x2b/0x50 [ 35.171126] __kasan_slab_free+0x10a/0x190 [ 35.171638] kmem_cache_free+0x10d/0x4d0 [ 35.172116] rcu_core+0x8c8/0x2860 [ 35.172535] __do_softirq+0x1b7/0x7d4 [ 35.172983] [ 35.173187] Last potentially related work creation: [ 35.173748] kasan_save_stack+0x22/0x50 [ 35.174227] __kasan_record_aux_stack+0x8e/0xa0 [ 35.174769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.175377] remove_vma+0x139/0x170 [ 35.175807] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.176336] do_vmi_munmap+0x1f1/0x2b0 [ 35.176793] __vm_munmap+0x138/0x3a0 [ 35.177235] __x64_sys_munmap+0x59/0x80 [ 35.177715] do_syscall_64+0x3f/0x90 [ 35.178161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.178867] [ 35.179116] The buggy address belongs to the object at ffff88800c54d658 [ 35.179116] which belongs to the cache vm_area_struct of size 168 [ 35.180829] The buggy address is located 88 bytes inside of [ 35.180829] freed 168-byte region [ffff88800c54d658, ffff88800c54d700) [ 35.182489] [ 35.182739] The buggy address belongs to the physical page: [ 35.183506] page:00000000859fc551 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc54d [ 35.184772] memcg:ffff88800f5d8a01 [ 35.185268] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.186032] page_type: 0xffffffff() [ 35.186561] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.187633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d8a01 [ 35.188690] page dumped because: kasan: bad access detected [ 35.189471] [ 35.189717] Memory state around the buggy address: [ 35.190394] ffff88800c54d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.191391] ffff88800c54d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.192386] >ffff88800c54d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.193408] ^ [ 35.194087] ffff88800c54d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.195081] ffff88800c54d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.196078] ================================================================== [ 35.197154] Disabling lock debugging due to kernel taint [ 37.397238] BUG: Bad rss-counter state mm:0000000050a6966c type:MM_FILEPAGES val:33 [ 37.398262] BUG: Bad rss-counter state mm:0000000050a6966c type:MM_ANONPAGES val:22 [ 37.888561] BUG: Bad rss-counter state mm:00000000da150744 type:MM_FILEPAGES val:33 [ 37.889494] BUG: Bad rss-counter state mm:00000000da150744 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58442' (ECDSA) to the list of known hosts. 2023/06/19 15:40:13 fuzzer started 2023/06/19 15:40:14 dialing manager at localhost:44161 2023/06/19 15:40:14 checking machine... 2023/06/19 15:40:14 checking revisions... [ 38.637262] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:40:14 testing simple program... [ 38.688207] cgroup: Unknown subsys name 'net' [ 38.746806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:40:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e43d120 RCX=ffffffff812e00e5 RDX=ffffed10028f7f9a RSI=0000000000000004 RDI=ffff8880147bfcd0 RBP=1ffff110028f7f96 RSP=ffff8880147bfca8 R8 =0000000000000001 R9 =ffffed10028f7f9a R10=0000000000000003 R11=0000000000000000 R12=ffff88800e43d128 R13=ffff88800e43d130 R14=000000000f0fd007 R15=000000000ea50067 RIP=ffffffff812e00e9 RFL=00000297 [--S-APC] 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 00007f6612bf6900 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=00007f6612084ea0 CR3=000000000ef34000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f975928c970312cb00000000000ae988 XMM05=6349f7b81316b64f00000000001353c8 XMM06=5c8f107c4f6475bf0000000000134168 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86088c1e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800f09efc0 R15=ffff88806cf09a98 RIP=ffffffff81131134 RFL=00000297 [--S-APC] 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 00007f2c58d94900 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=00007f2c58d3e008 CR3=000000000ea02000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000