syzkaller login: [ 28.878951] BUG: Bad rss-counter state mm:0000000056398a15 type:MM_FILEPAGES val:33 [ 28.879972] BUG: Bad rss-counter state mm:0000000056398a15 type:MM_ANONPAGES val:22 [ 29.045272] ================================================================== [ 29.046192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.047136] Read of size 8 at addr ffff88800ca8fc20 by task sshd/220 [ 29.047913] [ 29.048240] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.049129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.050144] Call Trace: [ 29.050494] [ 29.050779] dump_stack_lvl+0x91/0xf0 [ 29.051276] print_report+0xcc/0x620 [ 29.051759] ? __virt_addr_valid+0x102/0x340 [ 29.052315] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.052938] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.053561] kasan_report+0xbe/0xf0 [ 29.054054] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.054681] vma_interval_tree_remove+0xc75/0xec0 [ 29.055283] vma_prepare+0xc54/0x11a0 [ 29.055762] __split_vma+0x5af/0x950 [ 29.056229] ? __pfx___split_vma+0x10/0x10 [ 29.056768] ? find_held_lock+0x2c/0x110 [ 29.057302] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.057880] ? lock_is_held_type+0x9f/0x120 [ 29.058424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.059029] ? mtree_range_walk+0x632/0x900 [ 29.059579] ? mas_walk+0x5c7/0x7c0 [ 29.060052] do_vmi_munmap+0x1f1/0x2b0 [ 29.060551] mmap_region+0x1f9/0x2660 [ 29.061037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.061554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.062294] ? __pfx_lock_acquire+0x10/0x10 [ 29.062826] ? __pfx_mmap_region+0x10/0x10 [ 29.063351] ? security_mmap_addr+0x7d/0xa0 [ 29.063876] ? get_unmapped_area+0x1f5/0x3f0 [ 29.064426] do_mmap+0x854/0xf00 [ 29.064862] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.065362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.065945] ksys_mmap_pgoff+0x3af/0x500 [ 29.066453] do_syscall_64+0x3f/0x90 [ 29.066935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.067598] RIP: 0033:0x7f31a8e62d82 [ 29.068062] 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 [ 29.070230] RSP: 002b:00007fff3217d2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.071138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31a8e62d82 [ 29.071991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31a829c000 [ 29.072854] RBP: 00007f31a829c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.073733] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653c641ed90 [ 29.074581] R13: 00007fff3217d2c0 R14: 00007fff3217d2f0 R15: 00007fff3217d650 [ 29.075449] [ 29.075743] [ 29.075962] Allocated by task 213: [ 29.076404] kasan_save_stack+0x22/0x50 [ 29.076922] kasan_set_track+0x25/0x30 [ 29.077419] __kasan_slab_alloc+0x59/0x70 [ 29.077962] kmem_cache_alloc+0x16b/0x370 [ 29.078481] vm_area_dup+0x20/0x160 [ 29.078953] __split_vma+0x170/0x950 [ 29.079418] split_vma+0xc6/0x110 [ 29.079863] mprotect_fixup+0x8d2/0xb30 [ 29.080365] do_mprotect_pkey+0x87e/0xd40 [ 29.080887] __x64_sys_mprotect+0x78/0xc0 [ 29.081423] do_syscall_64+0x3f/0x90 [ 29.081922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.082572] [ 29.082787] Freed by task 19: [ 29.083170] kasan_save_stack+0x22/0x50 [ 29.083673] kasan_set_track+0x25/0x30 [ 29.084163] kasan_save_free_info+0x2b/0x50 [ 29.084698] __kasan_slab_free+0x10a/0x190 [ 29.085234] kmem_cache_free+0x10d/0x4d0 [ 29.085754] rcu_core+0x8c8/0x2860 [ 29.086201] __do_softirq+0x1b7/0x7d4 [ 29.086680] [ 29.086899] Last potentially related work creation: [ 29.087490] kasan_save_stack+0x22/0x50 [ 29.087996] __kasan_record_aux_stack+0x8e/0xa0 [ 29.088566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.089294] remove_vma+0x139/0x170 [ 29.089767] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.090338] do_vmi_munmap+0x1f1/0x2b0 [ 29.090823] __vm_munmap+0x138/0x3a0 [ 29.091295] __x64_sys_munmap+0x59/0x80 [ 29.091793] do_syscall_64+0x3f/0x90 [ 29.092271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.092920] [ 29.093135] The buggy address belongs to the object at ffff88800ca8fbc8 [ 29.093135] which belongs to the cache vm_area_struct of size 168 [ 29.094635] The buggy address is located 88 bytes inside of [ 29.094635] freed 168-byte region [ffff88800ca8fbc8, ffff88800ca8fc70) [ 29.096055] [ 29.096280] The buggy address belongs to the physical page: [ 29.096950] page:0000000070b664a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca8f [ 29.098049] memcg:ffff88800ca8e001 [ 29.098476] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.099131] page_type: 0xffffffff() [ 29.099588] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.100508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca8e001 [ 29.101414] page dumped because: kasan: bad access detected [ 29.102092] [ 29.102312] Memory state around the buggy address: [ 29.102898] ffff88800ca8fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.103765] ffff88800ca8fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.104632] >ffff88800ca8fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.105484] ^ [ 29.106020] ffff88800ca8fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.106881] ffff88800ca8fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.107740] ================================================================== [ 29.108686] Disabling lock debugging due to kernel taint [ 31.650257] BUG: Bad rss-counter state mm:000000002e3bcaf9 type:MM_FILEPAGES val:33 [ 31.651439] BUG: Bad rss-counter state mm:000000002e3bcaf9 type:MM_ANONPAGES val:22 [ 32.141050] BUG: Bad rss-counter state mm:00000000bc905b9d type:MM_FILEPAGES val:33 [ 32.142073] BUG: Bad rss-counter state mm:00000000bc905b9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40314' (ECDSA) to the list of known hosts. 2023/06/20 21:40:07 fuzzer started 2023/06/20 21:40:07 dialing manager at localhost:36067 2023/06/20 21:40:07 checking machine... 2023/06/20 21:40:07 checking revisions... [ 32.832604] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:40:08 testing simple program... [ 32.891958] cgroup: Unknown subsys name 'net' [ 32.942024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:07 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=00007f90c3235650 CR3=000000000dbd8000 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=30343a3132203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037303a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000562a09b05ed0 RBX=0000562a09afe740 RCX=0000000000000400 RDX=0000000000000400 RSI=0000562a09afe770 RDI=0000562a09b05ed0 RBP=0000562a09afe770 RSP=00007ffd418367a8 R8 =00007f90c2c806f8 R9 =00007f90c2c7615e R10=0000000000000000 R11=0000000000000287 R12=0000562a09b05ed0 R13=00007f90c2c806f8 R14=0000000000000400 R15=0000000000000400 RIP=00007f90c30f2fd0 RFL=00000216 [----AP-] 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 00007f90c2c80900 00000000 00000000 GS =0000 0000000000000000 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=00007f90c32380b0 CR3=000000000e83e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000