syzkaller login: [ 25.720607] BUG: Bad rss-counter state mm:0000000018343124 type:MM_FILEPAGES val:33 [ 25.722422] BUG: Bad rss-counter state mm:0000000018343124 type:MM_ANONPAGES val:22 [ 25.883121] ================================================================== [ 25.883977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.884866] Read of size 8 at addr ffff88801a1f1ed8 by task sshd/219 [ 25.885590] [ 25.885800] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.886795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.887739] Call Trace: [ 25.888039] [ 25.888308] dump_stack_lvl+0x91/0xf0 [ 25.888771] print_report+0xcc/0x620 [ 25.889438] ? __virt_addr_valid+0x102/0x340 [ 25.890206] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.891041] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.891869] kasan_report+0xbe/0xf0 [ 25.892512] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.893366] vma_interval_tree_remove+0xc75/0xec0 [ 25.894217] vma_prepare+0xc54/0x11a0 [ 25.894877] __split_vma+0x5af/0x950 [ 25.895428] ? __pfx___split_vma+0x10/0x10 [ 25.895823] ? find_held_lock+0x2c/0x110 [ 25.896207] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.896635] ? lock_is_held_type+0x9f/0x120 [ 25.897037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.897491] ? mtree_range_walk+0x632/0x900 [ 25.897903] ? mas_walk+0x5c7/0x7c0 [ 25.898274] do_vmi_munmap+0x1f1/0x2b0 [ 25.898642] mmap_region+0x1f9/0x2660 [ 25.898999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.899377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.899902] ? __pfx_lock_acquire+0x10/0x10 [ 25.900298] ? __pfx_mmap_region+0x10/0x10 [ 25.900688] ? security_mmap_addr+0x7d/0xa0 [ 25.901083] ? get_unmapped_area+0x1f5/0x3f0 [ 25.901495] do_mmap+0x854/0xf00 [ 25.901824] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.902200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.902628] ksys_mmap_pgoff+0x3af/0x500 [ 25.903012] do_syscall_64+0x3f/0x90 [ 25.903369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.903847] RIP: 0033:0x7fa920462d82 [ 25.904185] 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 [ 25.905741] RSP: 002b:00007ffc5a9be938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.906432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa920462d82 [ 25.907051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa91f89c000 [ 25.907677] RBP: 00007fa91f89c000 R08: 0000000000000009 R09: 0000000000001000 [ 25.908298] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd3a162ec0 [ 25.908927] R13: 00007ffc5a9be950 R14: 00007ffc5a9be980 R15: 00007ffc5a9bece0 [ 25.909564] [ 25.909782] [ 25.909946] Allocated by task 212: [ 25.910269] kasan_save_stack+0x22/0x50 [ 25.910644] kasan_set_track+0x25/0x30 [ 25.911014] __kasan_slab_alloc+0x59/0x70 [ 25.911398] kmem_cache_alloc+0x16b/0x370 [ 25.911777] vm_area_dup+0x20/0x160 [ 25.912112] __split_vma+0x170/0x950 [ 25.912457] split_vma+0xc6/0x110 [ 25.912786] mprotect_fixup+0x8d2/0xb30 [ 25.913158] do_mprotect_pkey+0x87e/0xd40 [ 25.913551] __x64_sys_mprotect+0x78/0xc0 [ 25.913939] do_syscall_64+0x3f/0x90 [ 25.914298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.914775] [ 25.914935] Freed by task 212: [ 25.915227] kasan_save_stack+0x22/0x50 [ 25.915608] kasan_set_track+0x25/0x30 [ 25.915974] kasan_save_free_info+0x2b/0x50 [ 25.916373] __kasan_slab_free+0x10a/0x190 [ 25.916774] kmem_cache_free+0x10d/0x4d0 [ 25.917153] rcu_core+0x8c8/0x2860 [ 25.917482] __do_softirq+0x1b7/0x7d4 [ 25.917837] [ 25.918001] Last potentially related work creation: [ 25.918459] kasan_save_stack+0x22/0x50 [ 25.918839] __kasan_record_aux_stack+0x8e/0xa0 [ 25.919262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.919741] remove_vma+0x139/0x170 [ 25.920078] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.920493] do_vmi_munmap+0x1f1/0x2b0 [ 25.920859] __vm_munmap+0x138/0x3a0 [ 25.921203] __x64_sys_munmap+0x59/0x80 [ 25.921571] do_syscall_64+0x3f/0x90 [ 25.921922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.922402] [ 25.922568] The buggy address belongs to the object at ffff88801a1f1e80 [ 25.922568] which belongs to the cache vm_area_struct of size 168 [ 25.923653] The buggy address is located 88 bytes inside of [ 25.923653] freed 168-byte region [ffff88801a1f1e80, ffff88801a1f1f28) [ 25.924684] [ 25.924847] The buggy address belongs to the physical page: [ 25.925332] page:000000008f59daf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1f1 [ 25.926161] memcg:ffff88801000b001 [ 25.926487] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.926959] page_type: 0xffffffff() [ 25.927291] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.927974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801000b001 [ 25.928644] page dumped because: kasan: bad access detected [ 25.929124] [ 25.929286] Memory state around the buggy address: [ 25.929713] ffff88801a1f1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.930352] ffff88801a1f1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 25.930979] >ffff88801a1f1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.931609] ^ [ 25.932145] ffff88801a1f1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 25.932773] ffff88801a1f1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.933398] ================================================================== [ 25.934266] Disabling lock debugging due to kernel taint [ 27.821504] BUG: Bad rss-counter state mm:0000000089e2ffb0 type:MM_FILEPAGES val:33 [ 27.822442] BUG: Bad rss-counter state mm:0000000089e2ffb0 type:MM_ANONPAGES val:22 [ 28.390998] BUG: Bad rss-counter state mm:00000000b05f5d07 type:MM_FILEPAGES val:33 [ 28.392203] BUG: Bad rss-counter state mm:00000000b05f5d07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52888' (ECDSA) to the list of known hosts. 2023/06/19 13:26:33 fuzzer started 2023/06/19 13:26:33 dialing manager at localhost:44161 2023/06/19 13:26:33 checking machine... 2023/06/19 13:26:33 checking revisions... [ 29.059222] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:26:33 testing simple program... [ 29.122367] cgroup: Unknown subsys name 'net' [ 29.168253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:31 Registers: info registers vcpu 0 RAX=ffff88801c680001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801c67fa01 RSI=ffff88801c67fa98 RDI=ffff88801c67fa98 RBP=ffff88801c67fa58 RSP=ffff88801c67f938 R8 =0000000000000001 R9 =ffff88801c67fa40 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801c67fa60 R13=ffff88801c67fa48 R14=ffff88801c67fa98 R15=ffff88801c67fa00 RIP=ffffffff8112fbf0 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 00007fc1f0ae8900 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=00007fc1f10a00b0 CR3=000000000e9c8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f03513a1020 CR3=0000000010294000 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=2033333a36323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a36323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000