syzkaller login: [ 32.078380] BUG: Bad rss-counter state mm:00000000ddea356a type:MM_FILEPAGES val:33 [ 32.079541] BUG: Bad rss-counter state mm:00000000ddea356a type:MM_ANONPAGES val:22 [ 32.247159] ================================================================== [ 32.248064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.249005] Read of size 8 at addr ffff88800cbe8798 by task sshd/221 [ 32.249931] [ 32.250166] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.251070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.252111] Call Trace: [ 32.252441] [ 32.252748] dump_stack_lvl+0x91/0xf0 [ 32.253277] print_report+0xcc/0x620 [ 32.253791] ? __virt_addr_valid+0x102/0x340 [ 32.254399] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.255033] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.255697] kasan_report+0xbe/0xf0 [ 32.256176] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.256823] vma_interval_tree_remove+0xc75/0xec0 [ 32.257451] vma_prepare+0xc54/0x11a0 [ 32.257958] __split_vma+0x5af/0x950 [ 32.258456] ? __pfx___split_vma+0x10/0x10 [ 32.259017] ? find_held_lock+0x2c/0x110 [ 32.259576] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.260157] ? lock_is_held_type+0x9f/0x120 [ 32.260734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.261341] ? mtree_range_walk+0x632/0x900 [ 32.261950] ? mas_walk+0x5c7/0x7c0 [ 32.262450] do_vmi_munmap+0x1f1/0x2b0 [ 32.262961] mmap_region+0x1f9/0x2660 [ 32.263445] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.263959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.264680] ? __pfx_lock_acquire+0x10/0x10 [ 32.265228] ? __pfx_mmap_region+0x10/0x10 [ 32.265770] ? security_mmap_addr+0x7d/0xa0 [ 32.266320] ? get_unmapped_area+0x1f5/0x3f0 [ 32.266890] do_mmap+0x854/0xf00 [ 32.267342] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.267844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.268420] ksys_mmap_pgoff+0x3af/0x500 [ 32.268936] do_syscall_64+0x3f/0x90 [ 32.269423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.270086] RIP: 0033:0x7f19e0bded82 [ 32.270554] 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 [ 32.272773] RSP: 002b:00007ffdcc72bff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.273695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19e0bded82 [ 32.274560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19e0018000 [ 32.275411] RBP: 00007f19e0018000 R08: 0000000000000009 R09: 0000000000001000 [ 32.276277] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e257cdec0 [ 32.277122] R13: 00007ffdcc72c010 R14: 00007ffdcc72c040 R15: 00007ffdcc72c3a0 [ 32.277982] [ 32.278326] [ 32.278545] Allocated by task 214: [ 32.278974] kasan_save_stack+0x22/0x50 [ 32.279484] kasan_set_track+0x25/0x30 [ 32.279984] __kasan_slab_alloc+0x59/0x70 [ 32.280525] kmem_cache_alloc+0x16b/0x370 [ 32.281043] vm_area_dup+0x20/0x160 [ 32.281501] __split_vma+0x170/0x950 [ 32.281970] split_vma+0xc6/0x110 [ 32.282432] mprotect_fixup+0x8d2/0xb30 [ 32.282931] do_mprotect_pkey+0x87e/0xd40 [ 32.283460] __x64_sys_mprotect+0x78/0xc0 [ 32.284007] do_syscall_64+0x3f/0x90 [ 32.284494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.285139] [ 32.285354] Freed by task 214: [ 32.285758] kasan_save_stack+0x22/0x50 [ 32.286282] kasan_set_track+0x25/0x30 [ 32.286785] kasan_save_free_info+0x2b/0x50 [ 32.287316] __kasan_slab_free+0x10a/0x190 [ 32.287862] kmem_cache_free+0x10d/0x4d0 [ 32.288375] rcu_core+0x8c8/0x2860 [ 32.288815] __do_softirq+0x1b7/0x7d4 [ 32.289302] [ 32.289522] Last potentially related work creation: [ 32.290138] kasan_save_stack+0x22/0x50 [ 32.290647] __kasan_record_aux_stack+0x8e/0xa0 [ 32.291322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.291987] remove_vma+0x139/0x170 [ 32.292444] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.293000] do_vmi_munmap+0x1f1/0x2b0 [ 32.293487] __vm_munmap+0x138/0x3a0 [ 32.293963] __x64_sys_munmap+0x59/0x80 [ 32.294475] do_syscall_64+0x3f/0x90 [ 32.294953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.295601] [ 32.295838] Second to last potentially related work creation: [ 32.296521] kasan_save_stack+0x22/0x50 [ 32.297034] __kasan_record_aux_stack+0x8e/0xa0 [ 32.297624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.298296] remove_vma+0x139/0x170 [ 32.298747] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.299317] do_vmi_munmap+0x1f1/0x2b0 [ 32.299817] mmap_region+0x1f9/0x2660 [ 32.300305] do_mmap+0x854/0xf00 [ 32.300750] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.301246] ksys_mmap_pgoff+0x3af/0x500 [ 32.301757] do_syscall_64+0x3f/0x90 [ 32.302249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.302901] [ 32.303120] The buggy address belongs to the object at ffff88800cbe8740 [ 32.303120] which belongs to the cache vm_area_struct of size 168 [ 32.304615] The buggy address is located 88 bytes inside of [ 32.304615] freed 168-byte region [ffff88800cbe8740, ffff88800cbe87e8) [ 32.306038] [ 32.306255] The buggy address belongs to the physical page: [ 32.306915] page:000000007485b54c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe8 [ 32.308005] memcg:ffff8880182ee201 [ 32.308436] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.309135] page_type: 0xffffffff() [ 32.309597] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.310530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182ee201 [ 32.311454] page dumped because: kasan: bad access detected [ 32.312125] [ 32.312341] Memory state around the buggy address: [ 32.312925] ffff88800cbe8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.313803] ffff88800cbe8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.314689] >ffff88800cbe8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.315536] ^ [ 32.316028] ffff88800cbe8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.316900] ffff88800cbe8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.317762] ================================================================== [ 32.318728] Disabling lock debugging due to kernel taint [ 34.337199] BUG: Bad rss-counter state mm:0000000098ec0f17 type:MM_FILEPAGES val:33 [ 34.338402] BUG: Bad rss-counter state mm:0000000098ec0f17 type:MM_ANONPAGES val:22 [ 34.712959] BUG: Bad rss-counter state mm:00000000c4ec0202 type:MM_FILEPAGES val:33 [ 34.713916] BUG: Bad rss-counter state mm:00000000c4ec0202 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52466' (ECDSA) to the list of known hosts. 2023/06/19 15:55:08 fuzzer started 2023/06/19 15:55:08 dialing manager at localhost:44161 2023/06/19 15:55:08 checking machine... 2023/06/19 15:55:08 checking revisions... [ 35.490263] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:55:08 testing simple program... [ 35.530073] cgroup: Unknown subsys name 'net' [ 35.570402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:06 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81839a7d RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffab8 R15=0000000000000000 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007f17c76ee700 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=00007ff2b76520b0 CR3=000000000d888000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037303a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363839 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fd2b4ef1a80 CR3=000000000f23e000 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=8921cd8705b0778b9a4091513a83bad8 XMM02=ec2efd57dc4c00df000000000011e630 XMM03=a569b9863408b593000000000011e700 XMM04=e473532c2e09e0ba00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135f98 XMM06=2edaad5297afe1b00000000000134e00 XMM07=e042d86d42eb936e0000000000125370 XMM08=a569b9863408b593000000000011e700 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000