syzkaller login: [ 92.551853] BUG: Bad rss-counter state mm:000000007466bc1c type:MM_FILEPAGES val:33 [ 92.553049] BUG: Bad rss-counter state mm:000000007466bc1c type:MM_ANONPAGES val:22 [ 92.713940] ================================================================== [ 92.714845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 92.715786] Read of size 8 at addr ffff88800fe3b880 by task sshd/225 [ 92.716560] [ 92.716780] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 92.717655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 92.718799] Call Trace: [ 92.719119] [ 92.719409] dump_stack_lvl+0x91/0xf0 [ 92.719898] print_report+0xcc/0x620 [ 92.720408] ? __virt_addr_valid+0x102/0x340 [ 92.720953] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.721568] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.722192] kasan_report+0xbe/0xf0 [ 92.722672] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.723301] vma_interval_tree_remove+0xc75/0xec0 [ 92.723906] vma_prepare+0xc54/0x11a0 [ 92.724405] __split_vma+0x5af/0x950 [ 92.724885] ? __pfx___split_vma+0x10/0x10 [ 92.725429] ? find_held_lock+0x2c/0x110 [ 92.725958] do_vmi_align_munmap+0x2ba/0x11f0 [ 92.726533] ? lock_is_held_type+0x9f/0x120 [ 92.727076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 92.727689] ? mtree_range_walk+0x632/0x900 [ 92.728259] ? mas_walk+0x5c7/0x7c0 [ 92.728744] do_vmi_munmap+0x1f1/0x2b0 [ 92.729239] mmap_region+0x1f9/0x2660 [ 92.729727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 92.730307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 92.731032] ? __pfx_lock_acquire+0x10/0x10 [ 92.731567] ? __pfx_mmap_region+0x10/0x10 [ 92.732105] ? security_mmap_addr+0x7d/0xa0 [ 92.732650] ? get_unmapped_area+0x1f5/0x3f0 [ 92.733205] do_mmap+0x854/0xf00 [ 92.733650] vm_mmap_pgoff+0x1a6/0x3a0 [ 92.734156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 92.734731] ksys_mmap_pgoff+0x3af/0x500 [ 92.735245] do_syscall_64+0x3f/0x90 [ 92.735733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.736390] RIP: 0033:0x7f639ed8cd82 [ 92.736852] 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 [ 92.739026] RSP: 002b:00007ffe71dae048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 92.739937] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f639ed8cd82 [ 92.740823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f639e1c6000 [ 92.741778] RBP: 00007f639e1c6000 R08: 0000000000000009 R09: 0000000000001000 [ 92.742638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cef4e52f70 [ 92.743488] R13: 00007ffe71dae060 R14: 00007ffe71dae090 R15: 00007ffe71dae3f0 [ 92.744374] [ 92.744673] [ 92.744889] Allocated by task 218: [ 92.745316] kasan_save_stack+0x22/0x50 [ 92.745825] kasan_set_track+0x25/0x30 [ 92.746321] __kasan_slab_alloc+0x59/0x70 [ 92.746843] kmem_cache_alloc+0x16b/0x370 [ 92.747361] vm_area_dup+0x20/0x160 [ 92.747819] __split_vma+0x170/0x950 [ 92.748294] split_vma+0xc6/0x110 [ 92.748745] mprotect_fixup+0x8d2/0xb30 [ 92.749249] do_mprotect_pkey+0x87e/0xd40 [ 92.749772] __x64_sys_mprotect+0x78/0xc0 [ 92.750299] do_syscall_64+0x3f/0x90 [ 92.750774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.751421] [ 92.751636] Freed by task 218: [ 92.752030] kasan_save_stack+0x22/0x50 [ 92.752551] kasan_set_track+0x25/0x30 [ 92.753046] kasan_save_free_info+0x2b/0x50 [ 92.753576] __kasan_slab_free+0x10a/0x190 [ 92.754108] kmem_cache_free+0x10d/0x4d0 [ 92.754620] rcu_core+0x8c8/0x2860 [ 92.755065] __do_softirq+0x1b7/0x7d4 [ 92.755554] [ 92.755771] Last potentially related work creation: [ 92.756371] kasan_save_stack+0x22/0x50 [ 92.756870] __kasan_record_aux_stack+0x8e/0xa0 [ 92.757454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 92.758102] remove_vma+0x139/0x170 [ 92.758558] do_vmi_align_munmap+0xd4a/0x11f0 [ 92.759123] do_vmi_munmap+0x1f1/0x2b0 [ 92.759614] __vm_munmap+0x138/0x3a0 [ 92.760087] __x64_sys_munmap+0x59/0x80 [ 92.760599] do_syscall_64+0x3f/0x90 [ 92.761076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.761721] [ 92.761938] The buggy address belongs to the object at ffff88800fe3b828 [ 92.761938] which belongs to the cache vm_area_struct of size 168 [ 92.763433] The buggy address is located 88 bytes inside of [ 92.763433] freed 168-byte region [ffff88800fe3b828, ffff88800fe3b8d0) [ 92.764858] [ 92.765075] The buggy address belongs to the physical page: [ 92.765731] page:000000006e692c5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe3b [ 92.766822] memcg:ffff888017fe6701 [ 92.767249] flags: 0x100000000000200(slab|node=0|zone=1) [ 92.767900] page_type: 0xffffffff() [ 92.768358] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 92.769296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017fe6701 [ 92.770207] page dumped because: kasan: bad access detected [ 92.770871] [ 92.771085] Memory state around the buggy address: [ 92.771669] ffff88800fe3b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 92.772548] ffff88800fe3b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 92.773413] >ffff88800fe3b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 92.774261] ^ [ 92.774677] ffff88800fe3b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.775537] ffff88800fe3b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 92.776396] ================================================================== [ 92.777485] Disabling lock debugging due to kernel taint [ 95.029965] BUG: Bad rss-counter state mm:00000000a98eddd6 type:MM_FILEPAGES val:33 [ 95.031129] BUG: Bad rss-counter state mm:00000000a98eddd6 type:MM_ANONPAGES val:22 [ 95.436289] BUG: Bad rss-counter state mm:000000005aa0732b type:MM_FILEPAGES val:33 [ 95.437519] BUG: Bad rss-counter state mm:000000005aa0732b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32810' (ECDSA) to the list of known hosts. 2023/06/19 17:37:57 fuzzer started 2023/06/19 17:37:58 dialing manager at localhost:44161 2023/06/19 17:37:58 checking machine... 2023/06/19 17:37:58 checking revisions... [ 96.147862] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:37:58 testing simple program... [ 96.206815] cgroup: Unknown subsys name 'net' [ 96.246812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:37:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dc9d1c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801617f6b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000024 RIP=ffffffff81374466 RFL=00000293 [--S-A-C] 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 00007f2ed1810900 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=00007fffa5446000 CR3=00000000143c0000 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=6720646572637465733a4d41503d706f 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 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=00007f4fb8d31020 CR3=000000000f39e000 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=2037353a37333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000