syzkaller login: [ 28.727454] BUG: Bad rss-counter state mm:00000000ef1a8535 type:MM_FILEPAGES val:33 [ 28.728624] BUG: Bad rss-counter state mm:00000000ef1a8535 type:MM_ANONPAGES val:22 [ 28.881567] ================================================================== [ 28.882508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.883445] Read of size 8 at addr ffff88800d9c7ed8 by task sshd/220 [ 28.884222] [ 28.884535] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.885414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.886415] Call Trace: [ 28.886744] [ 28.887035] dump_stack_lvl+0x91/0xf0 [ 28.887544] print_report+0xcc/0x620 [ 28.888037] ? __virt_addr_valid+0x102/0x340 [ 28.888605] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889226] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889846] kasan_report+0xbe/0xf0 [ 28.890334] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890961] vma_interval_tree_remove+0xc75/0xec0 [ 28.891574] vma_prepare+0xc54/0x11a0 [ 28.892059] __split_vma+0x5af/0x950 [ 28.892530] ? __pfx___split_vma+0x10/0x10 [ 28.893058] ? find_held_lock+0x2c/0x110 [ 28.893581] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.894156] ? lock_is_held_type+0x9f/0x120 [ 28.894700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.895315] ? mtree_range_walk+0x632/0x900 [ 28.895866] ? mas_walk+0x5c7/0x7c0 [ 28.896342] do_vmi_munmap+0x1f1/0x2b0 [ 28.896838] mmap_region+0x1f9/0x2660 [ 28.897318] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.897829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.898575] ? __pfx_lock_acquire+0x10/0x10 [ 28.899108] ? __pfx_mmap_region+0x10/0x10 [ 28.899637] ? security_mmap_addr+0x7d/0xa0 [ 28.900169] ? get_unmapped_area+0x1f5/0x3f0 [ 28.900723] do_mmap+0x854/0xf00 [ 28.901160] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.901655] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.902223] ksys_mmap_pgoff+0x3af/0x500 [ 28.902746] do_syscall_64+0x3f/0x90 [ 28.903229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903872] RIP: 0033:0x7fcb84898d82 [ 28.904330] 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 [ 28.906474] RSP: 002b:00007ffd5e29bed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.907400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb84898d82 [ 28.908249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb83cd2000 [ 28.909100] RBP: 00007fcb83cd2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.909964] R10: 0000000000000812 R11: 0000000000000206 R12: 000056308be7c980 [ 28.910817] R13: 00007ffd5e29bef0 R14: 00007ffd5e29bf20 R15: 00007ffd5e29c280 [ 28.911723] [ 28.912023] [ 28.912243] Allocated by task 213: [ 28.912681] kasan_save_stack+0x22/0x50 [ 28.913187] kasan_set_track+0x25/0x30 [ 28.913690] __kasan_slab_alloc+0x59/0x70 [ 28.914222] kmem_cache_alloc+0x16b/0x370 [ 28.914775] vm_area_dup+0x20/0x160 [ 28.915252] __split_vma+0x170/0x950 [ 28.915742] split_vma+0xc6/0x110 [ 28.916183] mprotect_fixup+0x8d2/0xb30 [ 28.916691] do_mprotect_pkey+0x87e/0xd40 [ 28.917207] __x64_sys_mprotect+0x78/0xc0 [ 28.917728] do_syscall_64+0x3f/0x90 [ 28.918234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918882] [ 28.919104] Freed by task 213: [ 28.919493] kasan_save_stack+0x22/0x50 [ 28.920003] kasan_set_track+0x25/0x30 [ 28.920504] kasan_save_free_info+0x2b/0x50 [ 28.921040] __kasan_slab_free+0x10a/0x190 [ 28.921580] kmem_cache_free+0x10d/0x4d0 [ 28.922110] rcu_core+0x8c8/0x2860 [ 28.922550] __do_softirq+0x1b7/0x7d4 [ 28.923034] [ 28.923253] Last potentially related work creation: [ 28.923842] kasan_save_stack+0x22/0x50 [ 28.924339] __kasan_record_aux_stack+0x8e/0xa0 [ 28.924913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.925554] remove_vma+0x139/0x170 [ 28.926028] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.926568] do_vmi_munmap+0x1f1/0x2b0 [ 28.927049] __vm_munmap+0x138/0x3a0 [ 28.927512] __x64_sys_munmap+0x59/0x80 [ 28.928006] do_syscall_64+0x3f/0x90 [ 28.928475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929109] [ 28.929320] The buggy address belongs to the object at ffff88800d9c7e80 [ 28.929320] which belongs to the cache vm_area_struct of size 168 [ 28.930759] The buggy address is located 88 bytes inside of [ 28.930759] freed 168-byte region [ffff88800d9c7e80, ffff88800d9c7f28) [ 28.932142] [ 28.932355] The buggy address belongs to the physical page: [ 28.932991] page:00000000c61ad516 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9c7 [ 28.934046] memcg:ffff88800e124901 [ 28.934464] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.935098] page_type: 0xffffffff() [ 28.935543] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.936447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e124901 [ 28.937336] page dumped because: kasan: bad access detected [ 28.938002] [ 28.938212] Memory state around the buggy address: [ 28.938778] ffff88800d9c7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.939618] ffff88800d9c7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.940449] >ffff88800d9c7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.941270] ^ [ 28.941988] ffff88800d9c7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.942818] ffff88800d9c7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.943649] ================================================================== [ 28.944599] Disabling lock debugging due to kernel taint [ 30.865227] BUG: Bad rss-counter state mm:00000000b78b1d27 type:MM_FILEPAGES val:33 [ 30.866466] BUG: Bad rss-counter state mm:00000000b78b1d27 type:MM_ANONPAGES val:22 [ 31.350435] BUG: Bad rss-counter state mm:0000000079f011f3 type:MM_FILEPAGES val:33 [ 31.351502] BUG: Bad rss-counter state mm:0000000079f011f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42998' (ECDSA) to the list of known hosts. 2023/06/21 00:41:25 fuzzer started 2023/06/21 00:41:26 dialing manager at localhost:36067 2023/06/21 00:41:26 checking machine... 2023/06/21 00:41:26 checking revisions... [ 32.090310] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:41:26 testing simple program... [ 32.148470] cgroup: Unknown subsys name 'net' [ 32.221616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8184725c RCX=0000000000000001 RDX=1ffff11001fcfe56 RSI=ffff88800fe7f628 RDI=ffffffff8184725c RBP=ffff88800fe7f2b0 RSP=ffff88800fe7f230 R8 =0000000000000001 R9 =ffff88800fe7f298 R10=0000000000038001 R11=0000000000020c51 R12=ffff88800fe7f320 R13=0000000000000000 R14=ffff888015a20000 R15=00000000000928c0 RIP=ffffffff811fc8a1 RFL=00000202 [-------] 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 00007fe050214900 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=00007ffd93323000 CR3=000000001bbe0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f2d257088a0 CR3=000000000c51e000 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=2035323a31343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a31343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000