syzkaller login: [ 29.930267] BUG: Bad rss-counter state mm:00000000adf585a5 type:MM_FILEPAGES val:33 [ 29.931490] BUG: Bad rss-counter state mm:00000000adf585a5 type:MM_ANONPAGES val:22 [ 30.056570] ================================================================== [ 30.057634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.058727] Read of size 8 at addr ffff8880164686b0 by task sshd/219 [ 30.059726] [ 30.059979] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.061008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.062143] Call Trace: [ 30.062517] [ 30.062846] dump_stack_lvl+0x91/0xf0 [ 30.063409] print_report+0xcc/0x620 [ 30.063982] ? __virt_addr_valid+0x102/0x340 [ 30.064666] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.065390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.066119] kasan_report+0xbe/0xf0 [ 30.066700] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.067458] vma_interval_tree_remove+0xc75/0xec0 [ 30.068200] vma_prepare+0xc54/0x11a0 [ 30.068783] __split_vma+0x5af/0x950 [ 30.069347] ? __pfx___split_vma+0x10/0x10 [ 30.069995] ? find_held_lock+0x2c/0x110 [ 30.070636] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.071323] ? lock_is_held_type+0x9f/0x120 [ 30.071996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.072772] ? mtree_range_walk+0x632/0x900 [ 30.073447] ? mas_walk+0x5c7/0x7c0 [ 30.074029] do_vmi_munmap+0x1f1/0x2b0 [ 30.074606] mmap_region+0x1f9/0x2660 [ 30.075097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.075619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.076366] ? __pfx_lock_acquire+0x10/0x10 [ 30.076908] ? __pfx_mmap_region+0x10/0x10 [ 30.077438] ? security_mmap_addr+0x7d/0xa0 [ 30.077971] ? get_unmapped_area+0x1f5/0x3f0 [ 30.078534] do_mmap+0x854/0xf00 [ 30.078973] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.079476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.080050] ksys_mmap_pgoff+0x3af/0x500 [ 30.080575] do_syscall_64+0x3f/0x90 [ 30.081070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.081737] RIP: 0033:0x7fdded19ed82 [ 30.082211] 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 [ 30.084379] RSP: 002b:00007ffd75c689d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.085298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdded19ed82 [ 30.086170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddec5d8000 [ 30.087050] RBP: 00007fddec5d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.087926] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eded741b20 [ 30.088817] R13: 00007ffd75c689f0 R14: 00007ffd75c68a20 R15: 00007ffd75c68d80 [ 30.089700] [ 30.090008] [ 30.090234] Allocated by task 212: [ 30.090692] kasan_save_stack+0x22/0x50 [ 30.091215] kasan_set_track+0x25/0x30 [ 30.091742] __kasan_slab_alloc+0x59/0x70 [ 30.092317] kmem_cache_alloc+0x16b/0x370 [ 30.092878] vm_area_dup+0x20/0x160 [ 30.093360] __split_vma+0x170/0x950 [ 30.093860] split_vma+0xc6/0x110 [ 30.094328] mprotect_fixup+0x8d2/0xb30 [ 30.094866] do_mprotect_pkey+0x87e/0xd40 [ 30.095424] __x64_sys_mprotect+0x78/0xc0 [ 30.095983] do_syscall_64+0x3f/0x90 [ 30.096501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.097179] [ 30.097407] Freed by task 212: [ 30.097827] kasan_save_stack+0x22/0x50 [ 30.098368] kasan_set_track+0x25/0x30 [ 30.098906] kasan_save_free_info+0x2b/0x50 [ 30.099479] __kasan_slab_free+0x10a/0x190 [ 30.100074] kmem_cache_free+0x10d/0x4d0 [ 30.100624] rcu_core+0x8c8/0x2860 [ 30.101099] __do_softirq+0x1b7/0x7d4 [ 30.101620] [ 30.101848] Last potentially related work creation: [ 30.102473] kasan_save_stack+0x22/0x50 [ 30.103024] __kasan_record_aux_stack+0x8e/0xa0 [ 30.103651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.104354] remove_vma+0x139/0x170 [ 30.104849] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.105456] do_vmi_munmap+0x1f1/0x2b0 [ 30.105992] __vm_munmap+0x138/0x3a0 [ 30.106504] __x64_sys_munmap+0x59/0x80 [ 30.107048] do_syscall_64+0x3f/0x90 [ 30.107570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.108290] [ 30.108527] The buggy address belongs to the object at ffff888016468658 [ 30.108527] which belongs to the cache vm_area_struct of size 168 [ 30.110130] The buggy address is located 88 bytes inside of [ 30.110130] freed 168-byte region [ffff888016468658, ffff888016468700) [ 30.111664] [ 30.111898] The buggy address belongs to the physical page: [ 30.112625] page:00000000b3472658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16468 [ 30.113820] memcg:ffff88800d1afa01 [ 30.114293] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.115007] page_type: 0xffffffff() [ 30.115503] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.116522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1afa01 [ 30.117498] page dumped because: kasan: bad access detected [ 30.118214] [ 30.118447] Memory state around the buggy address: [ 30.119087] ffff888016468580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.120025] ffff888016468600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.120953] >ffff888016468680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.121869] ^ [ 30.122494] ffff888016468700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.123429] ffff888016468780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.124364] ================================================================== [ 30.125460] Disabling lock debugging due to kernel taint [ 32.073269] BUG: Bad rss-counter state mm:00000000334bed5d type:MM_FILEPAGES val:33 [ 32.074471] BUG: Bad rss-counter state mm:00000000334bed5d type:MM_ANONPAGES val:22 [ 32.445641] BUG: Bad rss-counter state mm:0000000071d72a71 type:MM_FILEPAGES val:33 [ 32.446639] BUG: Bad rss-counter state mm:0000000071d72a71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10185' (ECDSA) to the list of known hosts. 2023/06/20 13:57:30 fuzzer started 2023/06/20 13:57:30 dialing manager at localhost:36067 2023/06/20 13:57:30 checking machine... 2023/06/20 13:57:30 checking revisions... [ 33.168681] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:57:30 testing simple program... [ 33.224209] cgroup: Unknown subsys name 'net' [ 33.266164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:57:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8617f8cc RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888010297500 RSP=ffff888010297438 R8 =ffffffff8617f8d0 R9 =ffff8880102974e8 R10=0000000000038001 R11=000000000002c9f6 R12=ffff888010297508 R13=ffff8880102974f0 R14=ffff8880102979b8 R15=ffff8880102974a8 RIP=ffffffff81131162 RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f192c1d1900 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=00007f192b651d40 CR3=000000000d87a000 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=4659e03e954731b800000000000ae988 XMM05=2b2c7558bcae34e60000000000132c10 XMM06=806171799158d9670000000000131a00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000163e385b2c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=00000000000545d8 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f17f4 R11=ffff88806cf09ff8 R12=00000000000545d8 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000012 [----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 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=00007ffef22f9bb8 CR3=000000000e442000 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=2039323a37353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a37353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000