syzkaller login: [ 38.744703] BUG: Bad rss-counter state mm:0000000098c5ebfa type:MM_FILEPAGES val:33 [ 38.745754] BUG: Bad rss-counter state mm:0000000098c5ebfa type:MM_ANONPAGES val:22 [ 38.912056] ================================================================== [ 38.913168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.914293] Read of size 8 at addr ffff88800967d6b0 by task sshd/219 [ 38.915416] [ 38.915678] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.916583] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.917601] Call Trace: [ 38.917922] [ 38.918211] dump_stack_lvl+0x91/0xf0 [ 38.918720] print_report+0xcc/0x620 [ 38.919224] ? __virt_addr_valid+0x102/0x340 [ 38.919787] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920448] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921075] kasan_report+0xbe/0xf0 [ 38.921588] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922221] vma_interval_tree_remove+0xc75/0xec0 [ 38.922841] vma_prepare+0xc54/0x11a0 [ 38.923342] __split_vma+0x5af/0x950 [ 38.923851] ? __pfx___split_vma+0x10/0x10 [ 38.924408] ? find_held_lock+0x2c/0x110 [ 38.924935] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.925524] ? lock_is_held_type+0x9f/0x120 [ 38.926068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.926701] ? mtree_range_walk+0x632/0x900 [ 38.927280] ? mas_walk+0x5c7/0x7c0 [ 38.927779] do_vmi_munmap+0x1f1/0x2b0 [ 38.928276] mmap_region+0x1f9/0x2660 [ 38.928767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.929295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.930050] ? __pfx_lock_acquire+0x10/0x10 [ 38.930636] ? __pfx_mmap_region+0x10/0x10 [ 38.931200] ? security_mmap_addr+0x7d/0xa0 [ 38.931797] ? get_unmapped_area+0x1f5/0x3f0 [ 38.932422] do_mmap+0x854/0xf00 [ 38.932881] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.934006] ksys_mmap_pgoff+0x3af/0x500 [ 38.934528] do_syscall_64+0x3f/0x90 [ 38.935034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935712] RIP: 0033:0x7fbf2fa97d82 [ 38.936171] 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 [ 38.938355] RSP: 002b:00007ffdc6482818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.939301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf2fa97d82 [ 38.940186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf2eed1000 [ 38.941085] RBP: 00007fbf2eed1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.941963] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea731eaec0 [ 38.942828] R13: 00007ffdc6482830 R14: 00007ffdc6482860 R15: 00007ffdc6482bc0 [ 38.943718] [ 38.944015] [ 38.944233] Allocated by task 212: [ 38.944682] kasan_save_stack+0x22/0x50 [ 38.945189] kasan_set_track+0x25/0x30 [ 38.945709] __kasan_slab_alloc+0x59/0x70 [ 38.946236] kmem_cache_alloc+0x16b/0x370 [ 38.946774] vm_area_dup+0x20/0x160 [ 38.947260] __split_vma+0x170/0x950 [ 38.947752] split_vma+0xc6/0x110 [ 38.948205] mprotect_fixup+0x8d2/0xb30 [ 38.948734] do_mprotect_pkey+0x87e/0xd40 [ 38.949259] __x64_sys_mprotect+0x78/0xc0 [ 38.949810] do_syscall_64+0x3f/0x90 [ 38.950289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950955] [ 38.951191] Freed by task 212: [ 38.951603] kasan_save_stack+0x22/0x50 [ 38.952109] kasan_set_track+0x25/0x30 [ 38.952621] kasan_save_free_info+0x2b/0x50 [ 38.953152] __kasan_slab_free+0x10a/0x190 [ 38.953712] kmem_cache_free+0x10d/0x4d0 [ 38.954226] rcu_core+0x8c8/0x2860 [ 38.954686] __do_softirq+0x1b7/0x7d4 [ 38.955193] [ 38.955429] Last potentially related work creation: [ 38.956081] kasan_save_stack+0x22/0x50 [ 38.956636] __kasan_record_aux_stack+0x8e/0xa0 [ 38.957215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.957889] remove_vma+0x139/0x170 [ 38.958356] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.958942] do_vmi_munmap+0x1f1/0x2b0 [ 38.959469] __vm_munmap+0x138/0x3a0 [ 38.959935] __x64_sys_munmap+0x59/0x80 [ 38.960449] do_syscall_64+0x3f/0x90 [ 38.960922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961582] [ 38.961797] Second to last potentially related work creation: [ 38.962509] kasan_save_stack+0x22/0x50 [ 38.963040] __kasan_record_aux_stack+0x8e/0xa0 [ 38.963631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.964285] remove_vma+0x139/0x170 [ 38.964757] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.965320] do_vmi_munmap+0x1f1/0x2b0 [ 38.965820] __vm_munmap+0x138/0x3a0 [ 38.966288] __x64_sys_munmap+0x59/0x80 [ 38.966800] do_syscall_64+0x3f/0x90 [ 38.967289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967957] [ 38.968173] The buggy address belongs to the object at ffff88800967d658 [ 38.968173] which belongs to the cache vm_area_struct of size 168 [ 38.969667] The buggy address is located 88 bytes inside of [ 38.969667] freed 168-byte region [ffff88800967d658, ffff88800967d700) [ 38.971099] [ 38.971316] The buggy address belongs to the physical page: [ 38.971989] page:00000000ea06f758 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x967d [ 38.973104] memcg:ffff8880095c6801 [ 38.973555] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.974254] page_type: 0xffffffff() [ 38.974726] raw: 0100000000000200 ffff8880087a0c80 ffffea0000325380 dead000000000003 [ 38.975693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c6801 [ 38.976635] page dumped because: kasan: bad access detected [ 38.977293] [ 38.977527] Memory state around the buggy address: [ 38.978111] ffff88800967d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.978996] ffff88800967d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.979880] >ffff88800967d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.980768] ^ [ 38.981376] ffff88800967d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.982235] ffff88800967d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.983124] ================================================================== [ 38.984068] Disabling lock debugging due to kernel taint [ 40.974149] BUG: Bad rss-counter state mm:000000001f6a9e96 type:MM_FILEPAGES val:33 [ 40.975191] BUG: Bad rss-counter state mm:000000001f6a9e96 type:MM_ANONPAGES val:22 [ 41.480163] BUG: Bad rss-counter state mm:000000001a373d7e type:MM_FILEPAGES val:33 [ 41.481361] BUG: Bad rss-counter state mm:000000001a373d7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23667' (ECDSA) to the list of known hosts. 2023/06/20 12:18:07 fuzzer started 2023/06/20 12:18:07 dialing manager at localhost:36067 2023/06/20 12:18:07 checking machine... 2023/06/20 12:18:07 checking revisions... [ 42.147478] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:18:07 testing simple program... [ 42.195588] cgroup: Unknown subsys name 'net' [ 42.235565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:18:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015874800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000dbf RDI=ffff888018fc24c0 RBP=ffff8880158748d8 RSP=ffff88801ce3fd28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888015874898 R13=000000000000006e R14=ffff888015874800 R15=ffff888015eecac0 RIP=ffffffff8451fb74 RFL=00000286 [--S--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 00007f5968137900 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=00007f59686ec650 CR3=000000001bea8000 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=0000000000000002 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff815a5d39 RDI=ffffc9000063c069 RBP=ffff888014307d28 RSP=ffff888014307c60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000c000003e R13=ffff888014307d60 R14=00000000000000b4 R15=ffffc9000063c068 RIP=ffffffff815a5d87 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 00007fd0dbfee900 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=00007fd0db41cf10 CR3=000000000d924000 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=1f65a2812fd163f300000000000ae988 XMM05=8f4bbeecdd32f59a0000000000134778 XMM06=806171799158d96700000000001331f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000