syzkaller login: [ 33.255338] BUG: Bad rss-counter state mm:00000000e087739d type:MM_FILEPAGES val:33 [ 33.256788] BUG: Bad rss-counter state mm:00000000e087739d type:MM_ANONPAGES val:22 [ 33.393034] ================================================================== [ 33.394119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.395253] Read of size 8 at addr ffff8880143434e0 by task sshd/220 [ 33.396305] [ 33.396524] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.397396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.398389] Call Trace: [ 33.398710] [ 33.398997] dump_stack_lvl+0x91/0xf0 [ 33.399510] print_report+0xcc/0x620 [ 33.400000] ? __virt_addr_valid+0x102/0x340 [ 33.400555] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.401170] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.401806] kasan_report+0xbe/0xf0 [ 33.402283] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.402903] vma_interval_tree_remove+0xc75/0xec0 [ 33.403520] vma_prepare+0xc54/0x11a0 [ 33.404005] __split_vma+0x5af/0x950 [ 33.404482] ? __pfx___split_vma+0x10/0x10 [ 33.405013] ? find_held_lock+0x2c/0x110 [ 33.405534] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.406098] ? lock_is_held_type+0x9f/0x120 [ 33.406637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.407264] ? mtree_range_walk+0x632/0x900 [ 33.407816] ? mas_walk+0x5c7/0x7c0 [ 33.408292] do_vmi_munmap+0x1f1/0x2b0 [ 33.408786] mmap_region+0x1f9/0x2660 [ 33.409267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.409784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.410499] ? __pfx_lock_acquire+0x10/0x10 [ 33.411039] ? __pfx_mmap_region+0x10/0x10 [ 33.411584] ? security_mmap_addr+0x7d/0xa0 [ 33.412115] ? get_unmapped_area+0x1f5/0x3f0 [ 33.412668] do_mmap+0x854/0xf00 [ 33.413110] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.413607] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.414169] ksys_mmap_pgoff+0x3af/0x500 [ 33.414684] do_syscall_64+0x3f/0x90 [ 33.415177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.415828] RIP: 0033:0x7f1bcfe6fd82 [ 33.416289] 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 [ 33.418434] RSP: 002b:00007ffcd36df2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.419346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bcfe6fd82 [ 33.420197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bcf2a9000 [ 33.421061] RBP: 00007f1bcf2a9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.421915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5c7ba7d90 [ 33.422767] R13: 00007ffcd36df2e0 R14: 00007ffcd36df310 R15: 00007ffcd36df670 [ 33.423651] [ 33.423941] [ 33.424159] Allocated by task 213: [ 33.424603] kasan_save_stack+0x22/0x50 [ 33.425109] kasan_set_track+0x25/0x30 [ 33.425610] __kasan_slab_alloc+0x59/0x70 [ 33.426130] kmem_cache_alloc+0x16b/0x370 [ 33.426644] vm_area_dup+0x20/0x160 [ 33.427124] __split_vma+0x170/0x950 [ 33.427593] split_vma+0xc6/0x110 [ 33.428032] mprotect_fixup+0x8d2/0xb30 [ 33.428536] do_mprotect_pkey+0x87e/0xd40 [ 33.429059] __x64_sys_mprotect+0x78/0xc0 [ 33.429582] do_syscall_64+0x3f/0x90 [ 33.430057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.430703] [ 33.430920] Freed by task 203: [ 33.431322] kasan_save_stack+0x22/0x50 [ 33.431822] kasan_set_track+0x25/0x30 [ 33.432321] kasan_save_free_info+0x2b/0x50 [ 33.432852] __kasan_slab_free+0x10a/0x190 [ 33.433390] kmem_cache_free+0x10d/0x4d0 [ 33.433898] rcu_core+0x8c8/0x2860 [ 33.434344] __do_softirq+0x1b7/0x7d4 [ 33.434818] [ 33.435053] Last potentially related work creation: [ 33.435652] kasan_save_stack+0x22/0x50 [ 33.436154] __kasan_record_aux_stack+0x8e/0xa0 [ 33.436816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.437477] remove_vma+0x139/0x170 [ 33.437930] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.438500] do_vmi_munmap+0x1f1/0x2b0 [ 33.438981] __vm_munmap+0x138/0x3a0 [ 33.439459] __x64_sys_munmap+0x59/0x80 [ 33.439967] do_syscall_64+0x3f/0x90 [ 33.440438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.441087] [ 33.441312] The buggy address belongs to the object at ffff888014343488 [ 33.441312] which belongs to the cache vm_area_struct of size 168 [ 33.442804] The buggy address is located 88 bytes inside of [ 33.442804] freed 168-byte region [ffff888014343488, ffff888014343530) [ 33.444231] [ 33.444451] The buggy address belongs to the physical page: [ 33.445104] page:000000004e5564d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14343 [ 33.446191] memcg:ffff88800e2f3101 [ 33.446622] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.447278] page_type: 0xffffffff() [ 33.447727] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.448653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2f3101 [ 33.449563] page dumped because: kasan: bad access detected [ 33.450221] [ 33.450444] Memory state around the buggy address: [ 33.451019] ffff888014343380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.451896] ffff888014343400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.452763] >ffff888014343480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.453621] ^ [ 33.454378] ffff888014343500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.455251] ffff888014343580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.456101] ================================================================== [ 33.457107] Disabling lock debugging due to kernel taint [ 35.660782] BUG: Bad rss-counter state mm:000000006baf785c type:MM_FILEPAGES val:33 [ 35.661951] BUG: Bad rss-counter state mm:000000006baf785c type:MM_ANONPAGES val:22 [ 36.132541] BUG: Bad rss-counter state mm:00000000654b4e01 type:MM_FILEPAGES val:33 [ 36.133531] BUG: Bad rss-counter state mm:00000000654b4e01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19138' (ECDSA) to the list of known hosts. 2023/06/19 22:32:23 fuzzer started 2023/06/19 22:32:23 dialing manager at localhost:44161 2023/06/19 22:32:23 checking machine... 2023/06/19 22:32:23 checking revisions... [ 36.772671] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:32:23 testing simple program... [ 36.833653] cgroup: Unknown subsys name 'net' [ 36.885840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b929 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 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=00007ffefbd06268 CR3=000000001a16a000 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=2032323a32333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a32333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110011b0f93 RSP=ffff888008d87c88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff856180b0 R13=ffffffff813655d1 R14=ffff888008d71b40 R15=ffff888008d87dc0 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 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=00007fea5dae1798 CR3=000000000c690000 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=2c3d1d12bb43b1aa0d46af38b21121fd XMM02=2c67c8bc2e329bc3000000000011cb68 XMM03=fb795ef6d65770560000000000124888 XMM04=7a4ac9da425ba73800000000000ae988 XMM05=19e9129bd510f2350000000000134428 XMM06=9766e7589c60b10e0000000000133290 XMM07=e042d86d42eb936e0000000000124b08 XMM08=5c3c2cf3577c5bf0000000000011cbc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000