[ 31.723740] BUG: Bad rss-counter state mm:000000002fd781b8 type:MM_FILEPAGES val:33 [ 31.725063] BUG: Bad rss-counter state mm:000000002fd781b8 type:MM_ANONPAGES val:22 [ 31.886961] ================================================================== [ 31.888081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.889212] Read of size 8 at addr ffff88801b856ed8 by task sshd/218 [ 31.890340] [ 31.890601] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.891614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.892734] Call Trace: [ 31.893078] [ 31.893388] dump_stack_lvl+0x91/0xf0 [ 31.893937] print_report+0xcc/0x620 [ 31.894453] ? __virt_addr_valid+0x102/0x340 [ 31.895049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895712] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896379] kasan_report+0xbe/0xf0 [ 31.896903] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.897582] vma_interval_tree_remove+0xc75/0xec0 [ 31.898229] vma_prepare+0xc54/0x11a0 [ 31.898748] __split_vma+0x5af/0x950 [ 31.899258] ? __pfx___split_vma+0x10/0x10 [ 31.899829] ? find_held_lock+0x2c/0x110 [ 31.900391] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.901004] ? lock_is_held_type+0x9f/0x120 [ 31.901610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.902266] ? mtree_range_walk+0x632/0x900 [ 31.902857] ? mas_walk+0x5c7/0x7c0 [ 31.903371] do_vmi_munmap+0x1f1/0x2b0 [ 31.903904] mmap_region+0x1f9/0x2660 [ 31.904428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.904984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.905762] ? __pfx_lock_acquire+0x10/0x10 [ 31.906333] ? __pfx_mmap_region+0x10/0x10 [ 31.906913] ? security_mmap_addr+0x7d/0xa0 [ 31.907488] ? get_unmapped_area+0x1f5/0x3f0 [ 31.908083] do_mmap+0x854/0xf00 [ 31.908560] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.909099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.909726] ksys_mmap_pgoff+0x3af/0x500 [ 31.910276] do_syscall_64+0x3f/0x90 [ 31.910798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.911493] RIP: 0033:0x7fea41877d82 [ 31.911985] 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 [ 31.914271] RSP: 002b:00007fff73bf56f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.915256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea41877d82 [ 31.916183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea40cb1000 [ 31.917097] RBP: 00007fea40cb1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.918031] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c47c11ad90 [ 31.918936] R13: 00007fff73bf5710 R14: 00007fff73bf5740 R15: 00007fff73bf5aa0 [ 31.919856] [ 31.920177] [ 31.920408] Allocated by task 210: [ 31.920881] kasan_save_stack+0x22/0x50 [ 31.921441] kasan_set_track+0x25/0x30 [ 31.921983] __kasan_slab_alloc+0x59/0x70 [ 31.922545] kmem_cache_alloc+0x16b/0x370 [ 31.923107] vm_area_dup+0x20/0x160 [ 31.923602] __split_vma+0x170/0x950 [ 31.924110] split_vma+0xc6/0x110 [ 31.924595] mprotect_fixup+0x8d2/0xb30 [ 31.925142] do_mprotect_pkey+0x87e/0xd40 [ 31.925717] __x64_sys_mprotect+0x78/0xc0 [ 31.926279] do_syscall_64+0x3f/0x90 [ 31.926799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.927494] [ 31.927733] Freed by task 210: [ 31.928159] kasan_save_stack+0x22/0x50 [ 31.928708] kasan_set_track+0x25/0x30 [ 31.929239] kasan_save_free_info+0x2b/0x50 [ 31.929820] __kasan_slab_free+0x10a/0x190 [ 31.930400] kmem_cache_free+0x10d/0x4d0 [ 31.930956] rcu_core+0x8c8/0x2860 [ 31.931534] __do_softirq+0x1b7/0x7d4 [ 31.932056] [ 31.932290] Last potentially related work creation: [ 31.932924] kasan_save_stack+0x22/0x50 [ 31.933485] __kasan_record_aux_stack+0x8e/0xa0 [ 31.934110] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.934799] remove_vma+0x139/0x170 [ 31.935293] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.935903] do_vmi_munmap+0x1f1/0x2b0 [ 31.936430] __vm_munmap+0x138/0x3a0 [ 31.936938] __x64_sys_munmap+0x59/0x80 [ 31.937493] do_syscall_64+0x3f/0x90 [ 31.938012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.938707] [ 31.938938] The buggy address belongs to the object at ffff88801b856e80 [ 31.938938] which belongs to the cache vm_area_struct of size 168 [ 31.940554] The buggy address is located 88 bytes inside of [ 31.940554] freed 168-byte region [ffff88801b856e80, ffff88801b856f28) [ 31.942100] [ 31.942333] The buggy address belongs to the physical page: [ 31.943054] page:000000000a9eda54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b856 [ 31.944255] memcg:ffff88801a3f2601 [ 31.944715] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.945430] page_type: 0xffffffff() [ 31.945920] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.946930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f2601 [ 31.947925] page dumped because: kasan: bad access detected [ 31.948639] [ 31.948879] Memory state around the buggy address: [ 31.949535] ffff88801b856d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.950471] ffff88801b856e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.951409] >ffff88801b856e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.952340] ^ [ 31.953135] ffff88801b856f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.954088] ffff88801b856f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.955026] ================================================================== [ 31.956033] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.920174] BUG: Bad rss-counter state mm:0000000083418303 type:MM_FILEPAGES val:33 [ 33.921143] BUG: Bad rss-counter state mm:0000000083418303 type:MM_ANONPAGES val:22 [ 34.492027] BUG: Bad rss-counter state mm:000000003361771a type:MM_FILEPAGES val:33 [ 34.493213] BUG: Bad rss-counter state mm:000000003361771a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15362' (ECDSA) to the list of known hosts. 2023/06/21 02:30:10 fuzzer started 2023/06/21 02:30:10 dialing manager at localhost:36067 2023/06/21 02:30:10 checking machine... 2023/06/21 02:30:10 checking revisions... [ 35.138446] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:30:10 testing simple program... [ 35.180303] cgroup: Unknown subsys name 'net' [ 35.220313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:30:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff852c98b0 RCX=0000000000000000 RDX=ffff88800c6b3680 RSI=ffffffff81f1aa8c RDI=0000000000000004 RBP=dffffc0000000000 RSP=ffff88801cd4fd18 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000004 R14=ffff88800eb41900 R15=0000000000000001 RIP=ffffffff81ef0f77 RFL=00000292 [--S-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 00007f806f3f6900 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=00007f806f9ae0b0 CR3=0000000016792000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e12d1 RSP=ffff88806cf09668 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff815d98db R14=0000000000000001 R15=ffff888014690000 RIP=ffffffff8180f036 RFL=00000002 [-------] 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 00007fe96db7c900 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=00007fe96d09a000 CR3=000000000daac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2a9ad9b7fdd1413500000000000ae988 XMM05=68441c62ca0634a40000000000132e18 XMM06=bdf2e299e47b49d50000000000131898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000