syzkaller login: [ 38.736686] BUG: Bad rss-counter state mm:00000000977bf60c type:MM_FILEPAGES val:33 [ 38.738597] BUG: Bad rss-counter state mm:00000000977bf60c type:MM_ANONPAGES val:22 [ 38.913839] ================================================================== [ 38.914919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.916033] Read of size 8 at addr ffff88800eec1310 by task sshd/219 [ 38.917099] [ 38.917358] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.918378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.919527] Call Trace: [ 38.919906] [ 38.920273] dump_stack_lvl+0x91/0xf0 [ 38.920853] print_report+0xcc/0x620 [ 38.921373] ? __virt_addr_valid+0x102/0x340 [ 38.921960] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922615] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923268] kasan_report+0xbe/0xf0 [ 38.923772] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924442] vma_interval_tree_remove+0xc75/0xec0 [ 38.925075] vma_prepare+0xc54/0x11a0 [ 38.925588] __split_vma+0x5af/0x950 [ 38.926087] ? __pfx___split_vma+0x10/0x10 [ 38.926649] ? find_held_lock+0x2c/0x110 [ 38.927200] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.927796] ? lock_is_held_type+0x9f/0x120 [ 38.928384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.929023] ? mtree_range_walk+0x632/0x900 [ 38.929611] ? mas_walk+0x5c7/0x7c0 [ 38.930113] do_vmi_munmap+0x1f1/0x2b0 [ 38.930637] mmap_region+0x1f9/0x2660 [ 38.931146] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.931689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.932450] ? __pfx_lock_acquire+0x10/0x10 [ 38.933011] ? __pfx_mmap_region+0x10/0x10 [ 38.933566] ? security_mmap_addr+0x7d/0xa0 [ 38.934125] ? get_unmapped_area+0x1f5/0x3f0 [ 38.934710] do_mmap+0x854/0xf00 [ 38.935170] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.935693] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.936303] ksys_mmap_pgoff+0x3af/0x500 [ 38.936838] do_syscall_64+0x3f/0x90 [ 38.937345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938026] RIP: 0033:0x7f47f71f3d82 [ 38.938507] 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 [ 38.940751] RSP: 002b:00007ffcf22ec5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.941710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47f71f3d82 [ 38.942605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47f662d000 [ 38.943514] RBP: 00007f47f662d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944417] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562964097ec0 [ 38.945305] R13: 00007ffcf22ec5f0 R14: 00007ffcf22ec620 R15: 00007ffcf22ec980 [ 38.946209] [ 38.946517] [ 38.946745] Allocated by task 212: [ 38.947201] kasan_save_stack+0x22/0x50 [ 38.947739] kasan_set_track+0x25/0x30 [ 38.948269] __kasan_slab_alloc+0x59/0x70 [ 38.948823] kmem_cache_alloc+0x16b/0x370 [ 38.949370] vm_area_dup+0x20/0x160 [ 38.949849] __split_vma+0x170/0x950 [ 38.950342] split_vma+0xc6/0x110 [ 38.950809] mprotect_fixup+0x8d2/0xb30 [ 38.951340] do_mprotect_pkey+0x87e/0xd40 [ 38.951894] __x64_sys_mprotect+0x78/0xc0 [ 38.952457] do_syscall_64+0x3f/0x90 [ 38.952963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953643] [ 38.953875] Freed by task 212: [ 38.954290] kasan_save_stack+0x22/0x50 [ 38.954822] kasan_set_track+0x25/0x30 [ 38.955343] kasan_save_free_info+0x2b/0x50 [ 38.955904] __kasan_slab_free+0x10a/0x190 [ 38.956483] kmem_cache_free+0x10d/0x4d0 [ 38.957108] rcu_core+0x8c8/0x2860 [ 38.957577] __do_softirq+0x1b7/0x7d4 [ 38.958087] [ 38.958315] Last potentially related work creation: [ 38.958931] kasan_save_stack+0x22/0x50 [ 38.959461] __kasan_record_aux_stack+0x8e/0xa0 [ 38.960081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.960765] remove_vma+0x139/0x170 [ 38.961243] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.961833] do_vmi_munmap+0x1f1/0x2b0 [ 38.962350] __vm_munmap+0x138/0x3a0 [ 38.962843] __x64_sys_munmap+0x59/0x80 [ 38.963368] do_syscall_64+0x3f/0x90 [ 38.963870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964558] [ 38.964790] The buggy address belongs to the object at ffff88800eec12b8 [ 38.964790] which belongs to the cache vm_area_struct of size 168 [ 38.966337] The buggy address is located 88 bytes inside of [ 38.966337] freed 168-byte region [ffff88800eec12b8, ffff88800eec1360) [ 38.967833] [ 38.968068] The buggy address belongs to the physical page: [ 38.968766] page:00000000a042060d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec1 [ 38.969912] memcg:ffff88800e93f701 [ 38.970364] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.971046] page_type: 0xffffffff() [ 38.971524] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c2a80 dead000000000004 [ 38.972515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e93f701 [ 38.973464] page dumped because: kasan: bad access detected [ 38.974167] [ 38.974392] Memory state around the buggy address: [ 38.975010] ffff88800eec1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.975913] ffff88800eec1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.976825] >ffff88800eec1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.977718] ^ [ 38.978211] ffff88800eec1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.979115] ffff88800eec1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.980035] ================================================================== [ 38.981032] Disabling lock debugging due to kernel taint [ 41.046261] BUG: Bad rss-counter state mm:0000000059318fbb type:MM_FILEPAGES val:33 [ 41.047384] BUG: Bad rss-counter state mm:0000000059318fbb type:MM_ANONPAGES val:22 [ 41.619612] BUG: Bad rss-counter state mm:00000000bd9fd211 type:MM_FILEPAGES val:33 [ 41.620672] BUG: Bad rss-counter state mm:00000000bd9fd211 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61404' (ECDSA) to the list of known hosts. 2023/06/20 18:06:50 fuzzer started 2023/06/20 18:06:50 dialing manager at localhost:36067 2023/06/20 18:06:50 checking machine... 2023/06/20 18:06:50 checking revisions... [ 42.271999] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:06:51 testing simple program... [ 42.321885] cgroup: Unknown subsys name 'net' [ 42.395927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:06:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffc3baec48 CR3=0000000005482000 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=00007f54177e4510000055dfe2268790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f8a66df6000 RCX=ffffffff81007b82 RDX=ffff8880160651c0 RSI=00007f8a66df6000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88800d9ef388 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800d9ef4d0 R13=0000000000000000 R14=ffff8880160651c0 R15=000000000000001e RIP=ffffffff814c0438 RFL=00000206 [-----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 00007f8a6652c900 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=00007f88b6255650 CR3=000000000d6f8000 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=8970ab801da425a4324e8f7145adeaca XMM02=ec2efd57dc4c00df000000000011b4d8 XMM03=a844afda59d6afef000000000011b5a8 XMM04=7b05881527e0ee1900000000000ae988 XMM05=ffc13ba2e45989a90000000000132e98 XMM06=dfcdbad4f1609c3700000000001319e0 XMM07=fb795ef6d65770560000000000121ee8 XMM08=2c67c8bc2e329bc3000000000011b548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000