syzkaller login: [ 28.717621] BUG: Bad rss-counter state mm:00000000d0d91506 type:MM_FILEPAGES val:33 [ 28.718799] BUG: Bad rss-counter state mm:00000000d0d91506 type:MM_ANONPAGES val:22 [ 28.870757] ================================================================== [ 28.871689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.872636] Read of size 8 at addr ffff88800e9cadf0 by task sshd/219 [ 28.873416] [ 28.873645] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.874635] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.875630] Call Trace: [ 28.875953] [ 28.876237] dump_stack_lvl+0x91/0xf0 [ 28.876743] print_report+0xcc/0x620 [ 28.877271] ? __virt_addr_valid+0x102/0x340 [ 28.877835] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878463] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879088] kasan_report+0xbe/0xf0 [ 28.879581] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880204] vma_interval_tree_remove+0xc75/0xec0 [ 28.880808] vma_prepare+0xc54/0x11a0 [ 28.881284] __split_vma+0x5af/0x950 [ 28.881766] ? __pfx___split_vma+0x10/0x10 [ 28.882291] ? find_held_lock+0x2c/0x110 [ 28.882814] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.883391] ? lock_is_held_type+0x9f/0x120 [ 28.883956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.884569] ? mtree_range_walk+0x632/0x900 [ 28.885128] ? mas_walk+0x5c7/0x7c0 [ 28.885608] do_vmi_munmap+0x1f1/0x2b0 [ 28.886104] mmap_region+0x1f9/0x2660 [ 28.886595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.887117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887848] ? __pfx_lock_acquire+0x10/0x10 [ 28.888381] ? __pfx_mmap_region+0x10/0x10 [ 28.888917] ? security_mmap_addr+0x7d/0xa0 [ 28.889457] ? get_unmapped_area+0x1f5/0x3f0 [ 28.890016] do_mmap+0x854/0xf00 [ 28.890456] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.891537] ksys_mmap_pgoff+0x3af/0x500 [ 28.892048] do_syscall_64+0x3f/0x90 [ 28.892538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.893189] RIP: 0033:0x7ff8e4ca5d82 [ 28.893652] 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 [ 28.895799] RSP: 002b:00007ffd0d113d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.896717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8e4ca5d82 [ 28.897576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8e40df000 [ 28.898433] RBP: 00007ff8e40df000 R08: 0000000000000009 R09: 0000000000001000 [ 28.899287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d176d1ec0 [ 28.900148] R13: 00007ffd0d113d80 R14: 00007ffd0d113db0 R15: 00007ffd0d114110 [ 28.901010] [ 28.901305] [ 28.901521] Allocated by task 212: [ 28.901952] kasan_save_stack+0x22/0x50 [ 28.902464] kasan_set_track+0x25/0x30 [ 28.902962] __kasan_slab_alloc+0x59/0x70 [ 28.903506] kmem_cache_alloc+0x16b/0x370 [ 28.904019] vm_area_dup+0x20/0x160 [ 28.904482] __split_vma+0x170/0x950 [ 28.904976] split_vma+0xc6/0x110 [ 28.905424] mprotect_fixup+0x8d2/0xb30 [ 28.905939] do_mprotect_pkey+0x87e/0xd40 [ 28.906469] __x64_sys_mprotect+0x78/0xc0 [ 28.906997] do_syscall_64+0x3f/0x90 [ 28.907481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908134] [ 28.908354] Freed by task 212: [ 28.908752] kasan_save_stack+0x22/0x50 [ 28.909259] kasan_set_track+0x25/0x30 [ 28.909763] kasan_save_free_info+0x2b/0x50 [ 28.910307] __kasan_slab_free+0x10a/0x190 [ 28.910848] kmem_cache_free+0x10d/0x4d0 [ 28.911368] rcu_core+0x8c8/0x2860 [ 28.911818] __do_softirq+0x1b7/0x7d4 [ 28.912298] [ 28.912511] Last potentially related work creation: [ 28.913100] kasan_save_stack+0x22/0x50 [ 28.913611] __kasan_record_aux_stack+0x8e/0xa0 [ 28.914197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.914862] remove_vma+0x139/0x170 [ 28.915320] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.915907] do_vmi_munmap+0x1f1/0x2b0 [ 28.916399] __vm_munmap+0x138/0x3a0 [ 28.916871] __x64_sys_munmap+0x59/0x80 [ 28.917369] do_syscall_64+0x3f/0x90 [ 28.917846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918496] [ 28.918715] The buggy address belongs to the object at ffff88800e9cad98 [ 28.918715] which belongs to the cache vm_area_struct of size 168 [ 28.920219] The buggy address is located 88 bytes inside of [ 28.920219] freed 168-byte region [ffff88800e9cad98, ffff88800e9cae40) [ 28.921634] [ 28.921855] The buggy address belongs to the physical page: [ 28.922526] page:00000000e58f5d19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ca [ 28.923641] memcg:ffff88800df93c01 [ 28.924067] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.924776] page_type: 0xffffffff() [ 28.925223] raw: 0100000000000200 ffff8880087a0c80 ffffea0000317400 dead000000000005 [ 28.926148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df93c01 [ 28.927059] page dumped because: kasan: bad access detected [ 28.927740] [ 28.927959] Memory state around the buggy address: [ 28.928540] ffff88800e9cac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.929403] ffff88800e9cad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.930274] >ffff88800e9cad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.931136] ^ [ 28.931965] ffff88800e9cae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.932835] ffff88800e9cae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.933694] ================================================================== [ 28.934673] Disabling lock debugging due to kernel taint [ 30.823303] BUG: Bad rss-counter state mm:0000000072bb1ca4 type:MM_FILEPAGES val:33 [ 30.824367] BUG: Bad rss-counter state mm:0000000072bb1ca4 type:MM_ANONPAGES val:22 [ 31.297497] BUG: Bad rss-counter state mm:0000000002bc7a70 type:MM_FILEPAGES val:33 [ 31.298534] BUG: Bad rss-counter state mm:0000000002bc7a70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57640' (ECDSA) to the list of known hosts. 2023/06/20 19:52:13 fuzzer started 2023/06/20 19:52:14 dialing manager at localhost:36067 2023/06/20 19:52:14 checking machine... 2023/06/20 19:52:14 checking revisions... [ 31.969701] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:52:14 testing simple program... [ 32.006798] cgroup: Unknown subsys name 'net' [ 32.041904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffee8aa0488 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007fbbf6c00510000055eaf8998790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc07 RBX=ffffffff85dfe038 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe038 RSP=ffff88801590f4f0 R8 =ffffffff86138eb0 R9 =ffff88801590f5e8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe038 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f7d3b64d700 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=00007f4c25a083a0 CR3=000000000f064000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033313a3235 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000