syzkaller login: [ 30.364797] BUG: Bad rss-counter state mm:000000006966139a type:MM_FILEPAGES val:33 [ 30.365953] BUG: Bad rss-counter state mm:000000006966139a type:MM_ANONPAGES val:22 [ 30.495008] ================================================================== [ 30.495974] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.496980] Read of size 8 at addr ffff888018acb798 by task sshd/220 [ 30.497921] [ 30.498169] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.499092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.500124] Call Trace: [ 30.500464] [ 30.500769] dump_stack_lvl+0x91/0xf0 [ 30.501297] print_report+0xcc/0x620 [ 30.501822] ? __virt_addr_valid+0x102/0x340 [ 30.502416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503769] kasan_report+0xbe/0xf0 [ 30.504309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.505005] vma_interval_tree_remove+0xc75/0xec0 [ 30.505679] vma_prepare+0xc54/0x11a0 [ 30.506237] __split_vma+0x5af/0x950 [ 30.506769] ? __pfx___split_vma+0x10/0x10 [ 30.507342] ? find_held_lock+0x2c/0x110 [ 30.507892] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.508489] ? lock_is_held_type+0x9f/0x120 [ 30.509058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.509696] ? mtree_range_walk+0x632/0x900 [ 30.510288] ? mas_walk+0x5c7/0x7c0 [ 30.510791] do_vmi_munmap+0x1f1/0x2b0 [ 30.511305] mmap_region+0x1f9/0x2660 [ 30.511811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.512347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.513087] ? __pfx_lock_acquire+0x10/0x10 [ 30.513638] ? __pfx_mmap_region+0x10/0x10 [ 30.514196] ? security_mmap_addr+0x7d/0xa0 [ 30.514757] ? get_unmapped_area+0x1f5/0x3f0 [ 30.515330] do_mmap+0x854/0xf00 [ 30.515765] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.516252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.516810] ksys_mmap_pgoff+0x3af/0x500 [ 30.517314] do_syscall_64+0x3f/0x90 [ 30.517784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518440] RIP: 0033:0x7fa464696d82 [ 30.518895] 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 [ 30.521106] RSP: 002b:00007ffd6dd89828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.522041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa464696d82 [ 30.522927] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa463ad0000 [ 30.523798] RBP: 00007fa463ad0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.524674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055853bf36f70 [ 30.525545] R13: 00007ffd6dd89840 R14: 00007ffd6dd89870 R15: 00007ffd6dd89bd0 [ 30.526452] [ 30.526760] [ 30.526982] Allocated by task 213: [ 30.527423] kasan_save_stack+0x22/0x50 [ 30.527946] kasan_set_track+0x25/0x30 [ 30.528458] __kasan_slab_alloc+0x59/0x70 [ 30.529001] kmem_cache_alloc+0x16b/0x370 [ 30.529539] vm_area_dup+0x20/0x160 [ 30.530011] __split_vma+0x170/0x950 [ 30.530513] split_vma+0xc6/0x110 [ 30.530976] mprotect_fixup+0x8d2/0xb30 [ 30.531511] do_mprotect_pkey+0x87e/0xd40 [ 30.532058] __x64_sys_mprotect+0x78/0xc0 [ 30.532600] do_syscall_64+0x3f/0x90 [ 30.533105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.533774] [ 30.533999] Freed by task 203: [ 30.534437] kasan_save_stack+0x22/0x50 [ 30.534963] kasan_set_track+0x25/0x30 [ 30.535474] kasan_save_free_info+0x2b/0x50 [ 30.536043] __kasan_slab_free+0x10a/0x190 [ 30.536597] kmem_cache_free+0x10d/0x4d0 [ 30.537130] rcu_core+0x8c8/0x2860 [ 30.537605] __do_softirq+0x1b7/0x7d4 [ 30.538108] [ 30.538336] Last potentially related work creation: [ 30.538954] kasan_save_stack+0x22/0x50 [ 30.539558] __kasan_record_aux_stack+0x8e/0xa0 [ 30.540169] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.540846] remove_vma+0x139/0x170 [ 30.541320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.541907] do_vmi_munmap+0x1f1/0x2b0 [ 30.542435] __vm_munmap+0x138/0x3a0 [ 30.542920] __x64_sys_munmap+0x59/0x80 [ 30.543432] do_syscall_64+0x3f/0x90 [ 30.543937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.544618] [ 30.544843] The buggy address belongs to the object at ffff888018acb740 [ 30.544843] which belongs to the cache vm_area_struct of size 168 [ 30.546407] The buggy address is located 88 bytes inside of [ 30.546407] freed 168-byte region [ffff888018acb740, ffff888018acb7e8) [ 30.547880] [ 30.548108] The buggy address belongs to the physical page: [ 30.548789] page:00000000715fa03e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18acb [ 30.549923] memcg:ffff88800cfbde01 [ 30.550388] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.551061] page_type: 0xffffffff() [ 30.551532] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.552497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfbde01 [ 30.553449] page dumped because: kasan: bad access detected [ 30.554148] [ 30.554382] Memory state around the buggy address: [ 30.555012] ffff888018acb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.555939] ffff888018acb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.556863] >ffff888018acb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.557782] ^ [ 30.558317] ffff888018acb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.559232] ffff888018acb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.560152] ================================================================== [ 30.561368] Disabling lock debugging due to kernel taint [ 32.338728] BUG: Bad rss-counter state mm:000000000bed86f2 type:MM_FILEPAGES val:33 [ 32.339754] BUG: Bad rss-counter state mm:000000000bed86f2 type:MM_ANONPAGES val:22 [ 32.779755] BUG: Bad rss-counter state mm:000000001281cb12 type:MM_FILEPAGES val:33 [ 32.781416] BUG: Bad rss-counter state mm:000000001281cb12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20308' (ECDSA) to the list of known hosts. 2023/06/21 09:19:07 fuzzer started 2023/06/21 09:19:07 dialing manager at localhost:36067 2023/06/21 09:19:07 checking machine... 2023/06/21 09:19:07 checking revisions... [ 33.537678] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:19:08 testing simple program... [ 33.586096] cgroup: Unknown subsys name 'net' [ 33.628577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:19:07 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002b4bf3c RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff888018fe2160 RSP=ffff888015a5f990 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffffffff87f3e160 R14=ffff88800c36b3c0 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 00007fa034b5b700 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=00007ffcfc2b5bc8 CR3=0000000016624000 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=2037303a39313a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a39313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86139745 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880141d7600 RSP=ffff8880141d7538 R8 =ffffffff86139748 R9 =ffff8880141d75e8 R10=0000000000038001 R11=0000000000020f03 R12=ffff8880141d7608 R13=ffff8880141d75f0 R14=ffff8880141d7908 R15=ffff8880141d75a8 RIP=ffffffff81130b99 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa25541d900 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=00007f53f08af650 CR3=000000000d83c000 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=76a5fd44cbe08d8c9242ae1c0022b417 XMM02=ec2efd57dc4c00df000000000011a100 XMM03=23622ac2aff5893b000000000011a1d0 XMM04=57ea2ed03ea44da600000000000ae988 XMM05=17e86b4843c625c90000000000132ab8 XMM06=9487f34c15548a5e0000000000131858 XMM07=fb795ef6d65770560000000000121ab8 XMM08=2c67c8bc2e329bc3000000000011a170 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000