syzkaller login: [ 30.744685] BUG: Bad rss-counter state mm:000000007188df06 type:MM_FILEPAGES val:33 [ 30.745765] BUG: Bad rss-counter state mm:000000007188df06 type:MM_ANONPAGES val:22 [ 30.786445] ================================================================== [ 30.787544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788747] Read of size 8 at addr ffff8880166655c8 by task sshd/219 [ 30.789636] [ 30.789866] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.790864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.792088] Call Trace: [ 30.792451] [ 30.792797] dump_stack_lvl+0x91/0xf0 [ 30.793413] print_report+0xcc/0x620 [ 30.793925] ? __virt_addr_valid+0x102/0x340 [ 30.794524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795985] kasan_report+0xbe/0xf0 [ 30.796493] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797173] vma_interval_tree_remove+0xc75/0xec0 [ 30.797946] vma_prepare+0xc54/0x11a0 [ 30.798457] __split_vma+0x5af/0x950 [ 30.799057] ? __pfx___split_vma+0x10/0x10 [ 30.799744] ? find_held_lock+0x2c/0x110 [ 30.800329] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.801000] ? lock_is_held_type+0x9f/0x120 [ 30.801579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.802340] ? mtree_range_walk+0x632/0x900 [ 30.803073] ? mas_walk+0x5c7/0x7c0 [ 30.803646] do_vmi_munmap+0x1f1/0x2b0 [ 30.804169] mmap_region+0x1f9/0x2660 [ 30.804687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.805237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.805992] ? __pfx_lock_acquire+0x10/0x10 [ 30.806555] ? __pfx_mmap_region+0x10/0x10 [ 30.807116] ? security_mmap_addr+0x7d/0xa0 [ 30.807705] ? get_unmapped_area+0x1f5/0x3f0 [ 30.808312] do_mmap+0x854/0xf00 [ 30.808783] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.809305] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.809910] ksys_mmap_pgoff+0x3af/0x500 [ 30.810453] do_syscall_64+0x3f/0x90 [ 30.810965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811663] RIP: 0033:0x7f4f1ce77d82 [ 30.812151] 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 [ 30.814409] RSP: 002b:00007ffc42219748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.815406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f1ce77d82 [ 30.816302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f1c2b1000 [ 30.817200] RBP: 00007f4f1c2b1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.818091] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556555be7f70 [ 30.818989] R13: 00007ffc42219760 R14: 00007ffc42219790 R15: 00007ffc42219af0 [ 30.819930] [ 30.820240] [ 30.820475] Allocated by task 212: [ 30.820933] kasan_save_stack+0x22/0x50 [ 30.821470] kasan_set_track+0x25/0x30 [ 30.821997] __kasan_slab_alloc+0x59/0x70 [ 30.822551] kmem_cache_alloc+0x16b/0x370 [ 30.823094] vm_area_dup+0x20/0x160 [ 30.823588] __split_vma+0x170/0x950 [ 30.824093] split_vma+0xc6/0x110 [ 30.824567] mprotect_fixup+0x8d2/0xb30 [ 30.825105] do_mprotect_pkey+0x87e/0xd40 [ 30.825657] __x64_sys_mprotect+0x78/0xc0 [ 30.826213] do_syscall_64+0x3f/0x90 [ 30.826720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827427] [ 30.827665] Freed by task 212: [ 30.828084] kasan_save_stack+0x22/0x50 [ 30.828624] kasan_set_track+0x25/0x30 [ 30.829158] kasan_save_free_info+0x2b/0x50 [ 30.829724] __kasan_slab_free+0x10a/0x190 [ 30.830291] kmem_cache_free+0x10d/0x4d0 [ 30.830835] rcu_core+0x8c8/0x2860 [ 30.831334] __do_softirq+0x1b7/0x7d4 [ 30.831867] [ 30.832102] Last potentially related work creation: [ 30.832727] kasan_save_stack+0x22/0x50 [ 30.833265] __kasan_record_aux_stack+0x8e/0xa0 [ 30.833879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.834563] remove_vma+0x139/0x170 [ 30.835049] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.835656] do_vmi_munmap+0x1f1/0x2b0 [ 30.836173] __vm_munmap+0x138/0x3a0 [ 30.836672] __x64_sys_munmap+0x59/0x80 [ 30.837211] do_syscall_64+0x3f/0x90 [ 30.837722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838407] [ 30.838638] The buggy address belongs to the object at ffff888016665570 [ 30.838638] which belongs to the cache vm_area_struct of size 168 [ 30.840215] The buggy address is located 88 bytes inside of [ 30.840215] freed 168-byte region [ffff888016665570, ffff888016665618) [ 30.841710] [ 30.841940] The buggy address belongs to the physical page: [ 30.842647] page:00000000556fee6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16665 [ 30.843830] memcg:ffff88800c545901 [ 30.844286] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.844979] page_type: 0xffffffff() [ 30.845460] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.846442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c545901 [ 30.847414] page dumped because: kasan: bad access detected [ 30.848127] [ 30.848360] Memory state around the buggy address: [ 30.848984] ffff888016665480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.849898] ffff888016665500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.850805] >ffff888016665580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851729] ^ [ 30.852436] ffff888016665600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.853351] ffff888016665680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.854260] ================================================================== [ 30.855312] Disabling lock debugging due to kernel taint [ 33.588837] BUG: Bad rss-counter state mm:00000000f8bba2bd type:MM_FILEPAGES val:33 [ 33.589896] BUG: Bad rss-counter state mm:00000000f8bba2bd type:MM_ANONPAGES val:22 [ 34.095554] BUG: Bad rss-counter state mm:000000007f64c526 type:MM_FILEPAGES val:33 [ 34.096648] BUG: Bad rss-counter state mm:000000007f64c526 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6634' (ECDSA) to the list of known hosts. 2023/06/21 00:34:41 fuzzer started 2023/06/21 00:34:41 dialing manager at localhost:36067 2023/06/21 00:34:41 checking machine... 2023/06/21 00:34:41 checking revisions... [ 34.835259] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:34:41 testing simple program... [ 34.888886] cgroup: Unknown subsys name 'net' [ 34.926081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801929b680 RSI=ffffffff81ef7198 RDI=ffff88800cc80570 RBP=0000000000000001 RSP=ffff8880146278e8 R8 =0000000000000002 R9 =0000000000000007 R10=0000000000000011 R11=0000000000000001 R12=ffff888013eb31a0 R13=0000000000000007 R14=0000000000000059 R15=0000000000000011 RIP=ffffffff81ef71a3 RFL=00000212 [----A--] 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 00007f706ab89900 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=00007f706b1410b0 CR3=000000000e77c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09bd0 RCX=ffffffff860d8201 RDX=ffff88806cf09bd8 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09bd0 R15=ffff88806cf09a98 RIP=ffffffff8113128d RFL=00000283 [--S---C] 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=00007f21329c0000 CR3=000000000cb46000 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=fb6c1e89492d7ba8724a7b88c6024321 XMM02=ec2efd57dc4c00df000000000011a7b8 XMM03=c8fcb82eaa7b29bb000000000011a888 XMM04=cf439f524c6beb4500000000000ae988 XMM05=dfcdbad4f1609c370000000000131a98 XMM06=48d81a0ac5e3825d0000000000130900 XMM07=e042d86d42eb936e0000000000121f48 XMM08=c8fcb82eaa7b29bb000000000011a888 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000