syzkaller login: [ 32.121284] BUG: Bad rss-counter state mm:000000001e9bf47d type:MM_FILEPAGES val:33 [ 32.122299] BUG: Bad rss-counter state mm:000000001e9bf47d type:MM_ANONPAGES val:22 [ 32.292104] ================================================================== [ 32.293077] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.294095] Read of size 8 at addr ffff88801a868798 by task sshd/220 [ 32.295021] [ 32.295253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.296159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.297232] Call Trace: [ 32.297571] [ 32.297871] dump_stack_lvl+0x91/0xf0 [ 32.298388] print_report+0xcc/0x620 [ 32.298897] ? __virt_addr_valid+0x102/0x340 [ 32.299487] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.300140] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.300804] kasan_report+0xbe/0xf0 [ 32.301313] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.301970] vma_interval_tree_remove+0xc75/0xec0 [ 32.302614] vma_prepare+0xc54/0x11a0 [ 32.303117] __split_vma+0x5af/0x950 [ 32.303621] ? __pfx___split_vma+0x10/0x10 [ 32.304186] ? find_held_lock+0x2c/0x110 [ 32.304757] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.305353] ? lock_is_held_type+0x9f/0x120 [ 32.305925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.306569] ? mtree_range_walk+0x632/0x900 [ 32.307149] ? mas_walk+0x5c7/0x7c0 [ 32.307652] do_vmi_munmap+0x1f1/0x2b0 [ 32.308178] mmap_region+0x1f9/0x2660 [ 32.308695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.309231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.309995] ? __pfx_lock_acquire+0x10/0x10 [ 32.310557] ? __pfx_mmap_region+0x10/0x10 [ 32.311124] ? security_mmap_addr+0x7d/0xa0 [ 32.311682] ? get_unmapped_area+0x1f5/0x3f0 [ 32.312263] do_mmap+0x854/0xf00 [ 32.312752] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.313278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.313869] ksys_mmap_pgoff+0x3af/0x500 [ 32.314412] do_syscall_64+0x3f/0x90 [ 32.314923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.315603] RIP: 0033:0x7f5775884d82 [ 32.316094] 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 [ 32.318368] RSP: 002b:00007fff21dc0c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.319332] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5775884d82 [ 32.320251] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5774cbe000 [ 32.321161] RBP: 00007f5774cbe000 R08: 0000000000000009 R09: 0000000000001000 [ 32.322053] R10: 0000000000000812 R11: 0000000000000206 R12: 000056277ac1cf60 [ 32.322951] R13: 00007fff21dc0cb0 R14: 00007fff21dc0ce0 R15: 00007fff21dc1040 [ 32.323860] [ 32.324175] [ 32.324403] Allocated by task 213: [ 32.324867] kasan_save_stack+0x22/0x50 [ 32.325413] kasan_set_track+0x25/0x30 [ 32.325934] __kasan_slab_alloc+0x59/0x70 [ 32.326492] kmem_cache_alloc+0x16b/0x370 [ 32.327039] vm_area_dup+0x20/0x160 [ 32.327526] __split_vma+0x170/0x950 [ 32.328023] split_vma+0xc6/0x110 [ 32.328494] mprotect_fixup+0x8d2/0xb30 [ 32.329042] do_mprotect_pkey+0x87e/0xd40 [ 32.329598] __x64_sys_mprotect+0x78/0xc0 [ 32.330152] do_syscall_64+0x3f/0x90 [ 32.330654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.331331] [ 32.331560] Freed by task 213: [ 32.331974] kasan_save_stack+0x22/0x50 [ 32.332506] kasan_set_track+0x25/0x30 [ 32.333043] kasan_save_free_info+0x2b/0x50 [ 32.333604] __kasan_slab_free+0x10a/0x190 [ 32.334171] kmem_cache_free+0x10d/0x4d0 [ 32.334728] rcu_core+0x8c8/0x2860 [ 32.335211] __do_softirq+0x1b7/0x7d4 [ 32.335735] [ 32.335971] Last potentially related work creation: [ 32.336619] kasan_save_stack+0x22/0x50 [ 32.337179] __kasan_record_aux_stack+0x8e/0xa0 [ 32.337810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.338512] remove_vma+0x139/0x170 [ 32.339010] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.339623] do_vmi_munmap+0x1f1/0x2b0 [ 32.340161] __vm_munmap+0x138/0x3a0 [ 32.340685] __x64_sys_munmap+0x59/0x80 [ 32.341247] do_syscall_64+0x3f/0x90 [ 32.341766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.342477] [ 32.342713] Second to last potentially related work creation: [ 32.343468] kasan_save_stack+0x22/0x50 [ 32.344025] __kasan_record_aux_stack+0x8e/0xa0 [ 32.344668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.345373] remove_vma+0x139/0x170 [ 32.345873] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.346485] do_vmi_munmap+0x1f1/0x2b0 [ 32.347023] mmap_region+0x1f9/0x2660 [ 32.347554] do_mmap+0x854/0xf00 [ 32.348028] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.348564] ksys_mmap_pgoff+0x3af/0x500 [ 32.349127] do_syscall_64+0x3f/0x90 [ 32.349650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.350361] [ 32.350596] The buggy address belongs to the object at ffff88801a868740 [ 32.350596] which belongs to the cache vm_area_struct of size 168 [ 32.352216] The buggy address is located 88 bytes inside of [ 32.352216] freed 168-byte region [ffff88801a868740, ffff88801a8687e8) [ 32.353769] [ 32.354011] The buggy address belongs to the physical page: [ 32.354739] page:00000000225523bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a868 [ 32.355953] memcg:ffff88801a839a01 [ 32.356424] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.357155] page_type: 0xffffffff() [ 32.357656] raw: 0100000000000200 ffff88800879fc80 ffffea000061fc40 dead000000000008 [ 32.358670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a839a01 [ 32.359661] page dumped because: kasan: bad access detected [ 32.360385] [ 32.360628] Memory state around the buggy address: [ 32.361272] ffff88801a868680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.362216] ffff88801a868700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.363163] >ffff88801a868780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.364102] ^ [ 32.364652] ffff88801a868800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.365603] ffff88801a868880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.366548] ================================================================== [ 32.367708] Disabling lock debugging due to kernel taint [ 35.045905] BUG: Bad rss-counter state mm:000000000d2c0a17 type:MM_FILEPAGES val:33 [ 35.046908] BUG: Bad rss-counter state mm:000000000d2c0a17 type:MM_ANONPAGES val:22 [ 35.660370] BUG: Bad rss-counter state mm:00000000fc093649 type:MM_FILEPAGES val:33 [ 35.661582] BUG: Bad rss-counter state mm:00000000fc093649 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44209' (ECDSA) to the list of known hosts. 2023/06/20 08:00:02 fuzzer started 2023/06/20 08:00:02 dialing manager at localhost:44161 2023/06/20 08:00:02 checking machine... 2023/06/20 08:00:02 checking revisions... [ 36.292902] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:02 testing simple program... [ 36.350009] cgroup: Unknown subsys name 'net' [ 36.414749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff8880142ed1c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800e7641b0 RIP=ffffffff81374466 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 00007f2ced266900 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=00007f2ced81b650 CR3=000000000d4e6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84506c7f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100285ce4a RSI=ffff8880142e7f10 RDI=ffffffff84506c7f RBP=ffff8880142e7250 RSP=ffff8880142e71e8 R8 =0000000000000001 R9 =ffff8880142e7238 R10=0000000000038001 R11=000000000002244e R12=ffff8880142e72c0 R13=0000000000000000 R14=ffff8880142e8000 R15=0000000000092cc0 RIP=ffffffff811303b9 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 00007fd242e8f900 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=00007fd2422b2270 CR3=000000000953a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=45e20205d8dd988700000000000ae988 XMM05=815524e7af646f3b0000000000137018 XMM06=19e9129bd510f2350000000000135eb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000