syzkaller login: [ 32.053516] BUG: Bad rss-counter state mm:000000001a02b0bd type:MM_FILEPAGES val:33 [ 32.055492] BUG: Bad rss-counter state mm:000000001a02b0bd type:MM_ANONPAGES val:22 [ 32.219329] ================================================================== [ 32.220417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.221525] Read of size 8 at addr ffff888018fb7140 by task sshd/228 [ 32.222574] [ 32.222835] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.223844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.225085] Call Trace: [ 32.225475] [ 32.225825] dump_stack_lvl+0x91/0xf0 [ 32.226422] print_report+0xcc/0x620 [ 32.226994] ? __virt_addr_valid+0x102/0x340 [ 32.227642] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.228370] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.229123] kasan_report+0xbe/0xf0 [ 32.229719] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.230485] vma_interval_tree_remove+0xc75/0xec0 [ 32.231230] vma_prepare+0xc54/0x11a0 [ 32.231820] __split_vma+0x5af/0x950 [ 32.232398] ? __pfx___split_vma+0x10/0x10 [ 32.233050] ? find_held_lock+0x2c/0x110 [ 32.233711] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.234404] ? lock_is_held_type+0x9f/0x120 [ 32.234942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.235557] ? mtree_range_walk+0x632/0x900 [ 32.236105] ? mas_walk+0x5c7/0x7c0 [ 32.236588] do_vmi_munmap+0x1f1/0x2b0 [ 32.237083] mmap_region+0x1f9/0x2660 [ 32.237564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.238083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.238809] ? __pfx_lock_acquire+0x10/0x10 [ 32.239342] ? __pfx_mmap_region+0x10/0x10 [ 32.239871] ? security_mmap_addr+0x7d/0xa0 [ 32.240395] ? get_unmapped_area+0x1f5/0x3f0 [ 32.240942] do_mmap+0x854/0xf00 [ 32.241381] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.241880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.242442] ksys_mmap_pgoff+0x3af/0x500 [ 32.242946] do_syscall_64+0x3f/0x90 [ 32.243424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.244080] RIP: 0033:0x7f35e182ad82 [ 32.244541] 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 [ 32.246675] RSP: 002b:00007fffa59bdf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.247580] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35e182ad82 [ 32.248420] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35e0c64000 [ 32.249258] RBP: 00007f35e0c64000 R08: 0000000000000009 R09: 0000000000001000 [ 32.250120] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6aff79ec0 [ 32.250973] R13: 00007fffa59bdf30 R14: 00007fffa59bdf60 R15: 00007fffa59be2c0 [ 32.251835] [ 32.252123] [ 32.252340] Allocated by task 221: [ 32.252769] kasan_save_stack+0x22/0x50 [ 32.253274] kasan_set_track+0x25/0x30 [ 32.253775] __kasan_slab_alloc+0x59/0x70 [ 32.254310] kmem_cache_alloc+0x16b/0x370 [ 32.254828] vm_area_dup+0x20/0x160 [ 32.255278] __split_vma+0x170/0x950 [ 32.255746] split_vma+0xc6/0x110 [ 32.256180] mprotect_fixup+0x8d2/0xb30 [ 32.256690] do_mprotect_pkey+0x87e/0xd40 [ 32.257205] __x64_sys_mprotect+0x78/0xc0 [ 32.257746] do_syscall_64+0x3f/0x90 [ 32.258230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.258869] [ 32.259085] Freed by task 221: [ 32.259483] kasan_save_stack+0x22/0x50 [ 32.259987] kasan_set_track+0x25/0x30 [ 32.260475] kasan_save_free_info+0x2b/0x50 [ 32.261014] __kasan_slab_free+0x10a/0x190 [ 32.261543] kmem_cache_free+0x10d/0x4d0 [ 32.262060] rcu_core+0x8c8/0x2860 [ 32.262509] __do_softirq+0x1b7/0x7d4 [ 32.263067] [ 32.263284] Last potentially related work creation: [ 32.263876] kasan_save_stack+0x22/0x50 [ 32.264386] __kasan_record_aux_stack+0x8e/0xa0 [ 32.264964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.265613] remove_vma+0x139/0x170 [ 32.266080] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.266635] do_vmi_munmap+0x1f1/0x2b0 [ 32.267118] __vm_munmap+0x138/0x3a0 [ 32.267579] __x64_sys_munmap+0x59/0x80 [ 32.268084] do_syscall_64+0x3f/0x90 [ 32.268564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.269210] [ 32.269429] The buggy address belongs to the object at ffff888018fb70e8 [ 32.269429] which belongs to the cache vm_area_struct of size 168 [ 32.270936] The buggy address is located 88 bytes inside of [ 32.270936] freed 168-byte region [ffff888018fb70e8, ffff888018fb7190) [ 32.272345] [ 32.272561] The buggy address belongs to the physical page: [ 32.273228] page:00000000cc80e80b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fb7 [ 32.274335] memcg:ffff88801a118301 [ 32.274760] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.275400] page_type: 0xffffffff() [ 32.275858] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.276780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a118301 [ 32.277701] page dumped because: kasan: bad access detected [ 32.278364] [ 32.278587] Memory state around the buggy address: [ 32.279171] ffff888018fb7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.280021] ffff888018fb7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.280870] >ffff888018fb7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.281727] ^ [ 32.282367] ffff888018fb7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.283254] ffff888018fb7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.284108] ================================================================== [ 32.285016] Disabling lock debugging due to kernel taint [ 34.423577] BUG: Bad rss-counter state mm:00000000c0f12077 type:MM_FILEPAGES val:33 [ 34.424789] BUG: Bad rss-counter state mm:00000000c0f12077 type:MM_ANONPAGES val:22 [ 34.883494] BUG: Bad rss-counter state mm:000000001dbea0f8 type:MM_FILEPAGES val:33 [ 34.885301] BUG: Bad rss-counter state mm:000000001dbea0f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31702' (ECDSA) to the list of known hosts. 2023/06/21 02:19:27 fuzzer started 2023/06/21 02:19:27 dialing manager at localhost:36067 2023/06/21 02:19:27 checking machine... 2023/06/21 02:19:27 checking revisions... [ 35.644335] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:19:27 testing simple program... [ 35.701313] cgroup: Unknown subsys name 'net' [ 35.740145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:27 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000255 RCX=0000000080000000 RDX=1ffff11002d67c04 RSI=ffffffff8171afc6 RDI=ffff888016b3e020 RBP=ffff88800f3a4000 RSP=ffff88800d967e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000004200 R13=00007fcddf66a000 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c0871 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcde014b900 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=00007fcddf66a000 CR3=000000000c786000 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=d3fdd5f48436fbd700000000000aead0 XMM01=8cdec34d38af4c0a00000000000f7d30 XMM02=693bd129e125714a00000000000f8070 XMM03=2fccd54c36d8a3f300000000000fa5b0 XMM04=6aa4c53685b346bc00000000000ae988 XMM05=afd545de16c811c00000000000133858 XMM06=94aac670ef06ff6500000000001328f8 XMM07=e042d86d42eb936e0000000000122e50 XMM08=e04906fff9ccd368000000000011ba68 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=00007ffdeeccc9c8 CR3=000000000da44000 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=2037323a39313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a39313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000