syzkaller login: [ 30.848986] BUG: Bad rss-counter state mm:00000000d74082ef type:MM_FILEPAGES val:33 [ 30.850035] BUG: Bad rss-counter state mm:00000000d74082ef type:MM_ANONPAGES val:22 [ 30.892695] ================================================================== [ 30.893648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.894651] Read of size 8 at addr ffff88800da825c8 by task sshd/219 [ 30.895497] [ 30.895785] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.896911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.898065] Call Trace: [ 30.898440] [ 30.898777] dump_stack_lvl+0x91/0xf0 [ 30.899355] print_report+0xcc/0x620 [ 30.899949] ? __virt_addr_valid+0x102/0x340 [ 30.900506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.901134] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.901751] kasan_report+0xbe/0xf0 [ 30.902366] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.902979] vma_interval_tree_remove+0xc75/0xec0 [ 30.903582] vma_prepare+0xc54/0x11a0 [ 30.904071] __split_vma+0x5af/0x950 [ 30.904555] ? __pfx___split_vma+0x10/0x10 [ 30.905077] ? find_held_lock+0x2c/0x110 [ 30.905597] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.906153] ? lock_is_held_type+0x9f/0x120 [ 30.906688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.907322] ? mtree_range_walk+0x632/0x900 [ 30.907893] ? mas_walk+0x5c7/0x7c0 [ 30.908376] do_vmi_munmap+0x1f1/0x2b0 [ 30.908865] mmap_region+0x1f9/0x2660 [ 30.909343] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.909862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.910569] ? __pfx_lock_acquire+0x10/0x10 [ 30.911131] ? __pfx_mmap_region+0x10/0x10 [ 30.911676] ? security_mmap_addr+0x7d/0xa0 [ 30.912204] ? get_unmapped_area+0x1f5/0x3f0 [ 30.912743] do_mmap+0x854/0xf00 [ 30.913185] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.913683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.914246] ksys_mmap_pgoff+0x3af/0x500 [ 30.914763] do_syscall_64+0x3f/0x90 [ 30.915236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915903] RIP: 0033:0x7fbfd4ef4d82 [ 30.916372] 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 [ 30.918549] RSP: 002b:00007ffece635498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.919484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfd4ef4d82 [ 30.920352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfd432e000 [ 30.921254] RBP: 00007fbfd432e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.922119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055882ee50ec0 [ 30.922957] R13: 00007ffece6354b0 R14: 00007ffece6354e0 R15: 00007ffece635840 [ 30.923823] [ 30.924126] [ 30.924348] Allocated by task 212: [ 30.924796] kasan_save_stack+0x22/0x50 [ 30.925309] kasan_set_track+0x25/0x30 [ 30.925815] __kasan_slab_alloc+0x59/0x70 [ 30.926353] kmem_cache_alloc+0x16b/0x370 [ 30.926880] vm_area_dup+0x20/0x160 [ 30.927345] __split_vma+0x170/0x950 [ 30.927841] split_vma+0xc6/0x110 [ 30.928295] mprotect_fixup+0x8d2/0xb30 [ 30.928823] do_mprotect_pkey+0x87e/0xd40 [ 30.929365] __x64_sys_mprotect+0x78/0xc0 [ 30.929911] do_syscall_64+0x3f/0x90 [ 30.930407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931071] [ 30.931294] Freed by task 212: [ 30.931727] kasan_save_stack+0x22/0x50 [ 30.932250] kasan_set_track+0x25/0x30 [ 30.932762] kasan_save_free_info+0x2b/0x50 [ 30.933316] __kasan_slab_free+0x10a/0x190 [ 30.933864] kmem_cache_free+0x10d/0x4d0 [ 30.934389] rcu_core+0x8c8/0x2860 [ 30.934857] __do_softirq+0x1b7/0x7d4 [ 30.935350] [ 30.935576] Last potentially related work creation: [ 30.936190] kasan_save_stack+0x22/0x50 [ 30.936711] __kasan_record_aux_stack+0x8e/0xa0 [ 30.937302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.937965] remove_vma+0x139/0x170 [ 30.938434] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.939013] do_vmi_munmap+0x1f1/0x2b0 [ 30.939517] __vm_munmap+0x138/0x3a0 [ 30.940012] __x64_sys_munmap+0x59/0x80 [ 30.940527] do_syscall_64+0x3f/0x90 [ 30.941019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.941680] [ 30.941904] The buggy address belongs to the object at ffff88800da82570 [ 30.941904] which belongs to the cache vm_area_struct of size 168 [ 30.943446] The buggy address is located 88 bytes inside of [ 30.943446] freed 168-byte region [ffff88800da82570, ffff88800da82618) [ 30.944920] [ 30.945148] The buggy address belongs to the physical page: [ 30.945830] page:0000000015553ad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda82 [ 30.946965] memcg:ffff88800e0b1f01 [ 30.947408] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.948097] page_type: 0xffffffff() [ 30.948563] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.949521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0b1f01 [ 30.950463] page dumped because: kasan: bad access detected [ 30.951142] [ 30.951365] Memory state around the buggy address: [ 30.951987] ffff88800da82480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.952878] ffff88800da82500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.953775] >ffff88800da82580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.954659] ^ [ 30.955354] ffff88800da82600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.956259] ffff88800da82680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.957141] ================================================================== [ 30.958285] Disabling lock debugging due to kernel taint [ 33.098148] BUG: Bad rss-counter state mm:00000000dfb7f90b type:MM_FILEPAGES val:33 [ 33.099760] BUG: Bad rss-counter state mm:00000000dfb7f90b type:MM_ANONPAGES val:22 [ 33.562490] BUG: Bad rss-counter state mm:00000000343daee2 type:MM_FILEPAGES val:33 [ 33.564135] BUG: Bad rss-counter state mm:00000000343daee2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1536' (ECDSA) to the list of known hosts. 2023/06/20 17:57:26 fuzzer started 2023/06/20 17:57:26 dialing manager at localhost:36067 2023/06/20 17:57:27 checking machine... 2023/06/20 17:57:27 checking revisions... [ 34.294636] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:57:27 testing simple program... [ 34.348073] cgroup: Unknown subsys name 'net' [ 34.392255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:26 Registers: info registers vcpu 0 RAX=1ffff11001741063 RBX=ffff88800ba08000 RCX=0000000000000000 RDX=ffff8880098b9b40 RSI=ffffffff83ab1a3f RDI=ffff88800ba08318 RBP=0000000000000000 RSP=ffff888019fd7508 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000007 R11=0000094b0000094b R12=0000000000000000 R13=0000000000000007 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1a52 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 00007febe8ed0900 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=00007febe9487618 CR3=000000001a3c6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f64bf695000 CR3=000000000d84a000 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=25579c6517543bb62a4bf1cd85eb2e18 XMM02=ec2efd57dc4c00df000000000011d4f0 XMM03=b6f2cc562a98e759000000000011d5c0 XMM04=10363d4abf8ea5a300000000000ae988 XMM05=dfcdbad4f1609c370000000000131a60 XMM06=806171799158d96700000000001318e8 XMM07=e042d86d42eb936e0000000000121ea8 XMM08=b6f2cc562a98e759000000000011d5c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000