syzkaller login: [ 61.466638] BUG: Bad rss-counter state mm:0000000008065eff type:MM_FILEPAGES val:33 [ 61.468072] BUG: Bad rss-counter state mm:0000000008065eff type:MM_ANONPAGES val:22 [ 61.504988] ================================================================== [ 61.505845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.506836] Read of size 8 at addr ffff88800ee2b4e0 by task sshd/219 [ 61.507592] [ 61.507809] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.508644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.509576] Call Trace: [ 61.509883] [ 61.510155] dump_stack_lvl+0x91/0xf0 [ 61.510634] print_report+0xcc/0x620 [ 61.511108] ? __virt_addr_valid+0x102/0x340 [ 61.511636] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.512230] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.512818] kasan_report+0xbe/0xf0 [ 61.513274] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.513875] vma_interval_tree_remove+0xc75/0xec0 [ 61.514461] vma_prepare+0xc54/0x11a0 [ 61.514920] __split_vma+0x5af/0x950 [ 61.515410] ? __pfx___split_vma+0x10/0x10 [ 61.515921] ? find_held_lock+0x2c/0x110 [ 61.516422] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.516966] ? lock_is_held_type+0x9f/0x120 [ 61.517486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.518068] ? mtree_range_walk+0x632/0x900 [ 61.518596] ? mas_walk+0x5c7/0x7c0 [ 61.519064] do_vmi_munmap+0x1f1/0x2b0 [ 61.519534] mmap_region+0x1f9/0x2660 [ 61.519997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.520498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.521194] ? __pfx_lock_acquire+0x10/0x10 [ 61.521729] ? __pfx_mmap_region+0x10/0x10 [ 61.522244] ? security_mmap_addr+0x7d/0xa0 [ 61.522769] ? get_unmapped_area+0x1f5/0x3f0 [ 61.523306] do_mmap+0x854/0xf00 [ 61.523727] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.524198] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.524738] ksys_mmap_pgoff+0x3af/0x500 [ 61.525226] do_syscall_64+0x3f/0x90 [ 61.525700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.526315] RIP: 0033:0x7f8c7aa0dd82 [ 61.526759] 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 [ 61.528816] RSP: 002b:00007ffe18382718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.529684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c7aa0dd82 [ 61.530502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c79e47000 [ 61.531316] RBP: 00007f8c79e47000 R08: 0000000000000009 R09: 0000000000001000 [ 61.532144] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615173feec0 [ 61.532974] R13: 00007ffe18382730 R14: 00007ffe18382760 R15: 00007ffe18382ac0 [ 61.533800] [ 61.534081] [ 61.534283] Allocated by task 212: [ 61.534696] kasan_save_stack+0x22/0x50 [ 61.535204] kasan_set_track+0x25/0x30 [ 61.535703] __kasan_slab_alloc+0x59/0x70 [ 61.536225] kmem_cache_alloc+0x16b/0x370 [ 61.536727] vm_area_dup+0x20/0x160 [ 61.537169] __split_vma+0x170/0x950 [ 61.537635] split_vma+0xc6/0x110 [ 61.538062] mprotect_fixup+0x8d2/0xb30 [ 61.538559] do_mprotect_pkey+0x87e/0xd40 [ 61.539077] __x64_sys_mprotect+0x78/0xc0 [ 61.539574] do_syscall_64+0x3f/0x90 [ 61.540041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.540668] [ 61.540874] Freed by task 19: [ 61.541275] kasan_save_stack+0x22/0x50 [ 61.541778] kasan_set_track+0x25/0x30 [ 61.542285] kasan_save_free_info+0x2b/0x50 [ 61.542807] __kasan_slab_free+0x10a/0x190 [ 61.543357] kmem_cache_free+0x10d/0x4d0 [ 61.543949] rcu_core+0x8c8/0x2860 [ 61.544412] __do_softirq+0x1b7/0x7d4 [ 61.544892] [ 61.545104] Last potentially related work creation: [ 61.545704] kasan_save_stack+0x22/0x50 [ 61.546211] __kasan_record_aux_stack+0x8e/0xa0 [ 61.546776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.547433] remove_vma+0x139/0x170 [ 61.547879] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.548441] do_vmi_munmap+0x1f1/0x2b0 [ 61.548919] __vm_munmap+0x138/0x3a0 [ 61.549410] __x64_sys_munmap+0x59/0x80 [ 61.549905] do_syscall_64+0x3f/0x90 [ 61.550394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.551069] [ 61.551290] The buggy address belongs to the object at ffff88800ee2b488 [ 61.551290] which belongs to the cache vm_area_struct of size 168 [ 61.552763] The buggy address is located 88 bytes inside of [ 61.552763] freed 168-byte region [ffff88800ee2b488, ffff88800ee2b530) [ 61.554169] [ 61.554407] The buggy address belongs to the physical page: [ 61.555066] page:00000000f9499b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee2b [ 61.556152] memcg:ffff88800e192301 [ 61.556610] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.557281] page_type: 0xffffffff() [ 61.557723] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.558637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e192301 [ 61.559557] page dumped because: kasan: bad access detected [ 61.560193] [ 61.560407] Memory state around the buggy address: [ 61.560962] ffff88800ee2b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.561796] ffff88800ee2b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 61.562632] >ffff88800ee2b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.563465] ^ [ 61.564190] ffff88800ee2b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 61.565021] ffff88800ee2b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.565834] ================================================================== [ 61.566836] Disabling lock debugging due to kernel taint [ 64.089233] BUG: Bad rss-counter state mm:000000005c96873a type:MM_FILEPAGES val:33 [ 64.090521] BUG: Bad rss-counter state mm:000000005c96873a type:MM_ANONPAGES val:22 [ 64.550063] BUG: Bad rss-counter state mm:00000000a7427f4d type:MM_FILEPAGES val:33 [ 64.551672] BUG: Bad rss-counter state mm:00000000a7427f4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39092' (ECDSA) to the list of known hosts. 2023/06/21 00:25:49 fuzzer started 2023/06/21 00:25:50 dialing manager at localhost:36067 2023/06/21 00:25:50 checking machine... 2023/06/21 00:25:50 checking revisions... [ 65.363078] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:25:50 testing simple program... [ 65.416615] cgroup: Unknown subsys name 'net' [ 65.459922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:25:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000564116b5b640 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000008000 RDI=0000564116b5ac20 RBP=0000564116b5ac20 RSP=00007fffbe008af8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000246 R12=0000000000000200 R13=0000564116b5ac20 R14=0000000000008000 R15=0000000000000001 RIP=00007f8992abe0f0 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f89925fe900 00000000 00000000 GS =0000 0000000000000000 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=00007f89925b201c CR3=000000000d548000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c04400 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=00007ffe026f0628 CR3=0000000005482000 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=00007fb4d3c01510000056513502a790 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