[ 23.713930] BUG: Bad rss-counter state mm:00000000586ddd24 type:MM_FILEPAGES val:33 [ 23.715483] BUG: Bad rss-counter state mm:00000000586ddd24 type:MM_ANONPAGES val:22 [ 23.868911] ================================================================== [ 23.869825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.870783] Read of size 8 at addr ffff8880096e7c20 by task sshd/219 [ 23.871646] [ 23.871863] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.872758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.873752] Call Trace: [ 23.874069] [ 23.874357] dump_stack_lvl+0x91/0xf0 [ 23.874860] print_report+0xcc/0x620 [ 23.875344] ? __virt_addr_valid+0x102/0x340 [ 23.875925] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.876552] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877183] kasan_report+0xbe/0xf0 [ 23.877673] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.878292] vma_interval_tree_remove+0xc75/0xec0 [ 23.878909] vma_prepare+0xc54/0x11a0 [ 23.879426] __split_vma+0x5af/0x950 [ 23.879915] ? __pfx___split_vma+0x10/0x10 [ 23.880469] ? find_held_lock+0x2c/0x110 [ 23.881006] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.881588] ? mark_held_locks+0x9e/0xe0 [ 23.882102] ? lock_is_held_type+0x9f/0x120 [ 23.882666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.883290] ? mtree_range_walk+0x632/0x900 [ 23.883867] ? mas_walk+0x5c7/0x7c0 [ 23.884350] do_vmi_munmap+0x1f1/0x2b0 [ 23.884884] mmap_region+0x1f9/0x2660 [ 23.885384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.885908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.886650] ? __pfx_lock_acquire+0x10/0x10 [ 23.887189] ? __pfx_mmap_region+0x10/0x10 [ 23.887745] ? security_mmap_addr+0x7d/0xa0 [ 23.888281] ? get_unmapped_area+0x1f5/0x3f0 [ 23.888870] do_mmap+0x854/0xf00 [ 23.889319] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.889837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.890414] ksys_mmap_pgoff+0x3af/0x500 [ 23.890926] do_syscall_64+0x3f/0x90 [ 23.891439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.892096] RIP: 0033:0x7f2051b11d82 [ 23.892613] 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 [ 23.894797] RSP: 002b:00007ffe0cff5758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.895724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2051b11d82 [ 23.896600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2050f4b000 [ 23.897484] RBP: 00007f2050f4b000 R08: 0000000000000009 R09: 0000000000001000 [ 23.898330] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f16387cec0 [ 23.899195] R13: 00007ffe0cff5770 R14: 00007ffe0cff57a0 R15: 00007ffe0cff5b00 [ 23.900070] [ 23.900381] [ 23.900613] Allocated by task 212: [ 23.901039] kasan_save_stack+0x22/0x50 [ 23.901559] kasan_set_track+0x25/0x30 [ 23.902061] __kasan_slab_alloc+0x59/0x70 [ 23.902630] kmem_cache_alloc+0x16b/0x370 [ 23.903152] vm_area_dup+0x20/0x160 [ 23.903623] __split_vma+0x170/0x950 [ 23.904093] split_vma+0xc6/0x110 [ 23.904548] mprotect_fixup+0x8d2/0xb30 [ 23.905081] do_mprotect_pkey+0x87e/0xd40 [ 23.905624] __x64_sys_mprotect+0x78/0xc0 [ 23.906157] do_syscall_64+0x3f/0x90 [ 23.906660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.907308] [ 23.907553] Freed by task 212: [ 23.907961] kasan_save_stack+0x22/0x50 [ 23.908485] kasan_set_track+0x25/0x30 [ 23.908986] kasan_save_free_info+0x2b/0x50 [ 23.909552] __kasan_slab_free+0x10a/0x190 [ 23.910092] kmem_cache_free+0x10d/0x4d0 [ 23.910624] rcu_core+0x8c8/0x2860 [ 23.911082] __do_softirq+0x1b7/0x7d4 [ 23.911595] [ 23.911811] Last potentially related work creation: [ 23.912420] kasan_save_stack+0x22/0x50 [ 23.912960] __kasan_record_aux_stack+0x8e/0xa0 [ 23.913544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.914191] remove_vma+0x139/0x170 [ 23.914670] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.915232] do_vmi_munmap+0x1f1/0x2b0 [ 23.915746] __vm_munmap+0x138/0x3a0 [ 23.916222] __x64_sys_munmap+0x59/0x80 [ 23.916743] do_syscall_64+0x3f/0x90 [ 23.917224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917890] [ 23.918111] Second to last potentially related work creation: [ 23.918813] kasan_save_stack+0x22/0x50 [ 23.919318] __kasan_record_aux_stack+0x8e/0xa0 [ 23.919915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.920579] remove_vma+0x139/0x170 [ 23.921061] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.921635] do_vmi_munmap+0x1f1/0x2b0 [ 23.922128] __vm_munmap+0x138/0x3a0 [ 23.922609] __x64_sys_munmap+0x59/0x80 [ 23.923115] do_syscall_64+0x3f/0x90 [ 23.923626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.924275] [ 23.924513] The buggy address belongs to the object at ffff8880096e7bc8 [ 23.924513] which belongs to the cache vm_area_struct of size 168 [ 23.926041] The buggy address is located 88 bytes inside of [ 23.926041] freed 168-byte region [ffff8880096e7bc8, ffff8880096e7c70) [ 23.927503] [ 23.927721] The buggy address belongs to the physical page: [ 23.928399] page:000000006d5d7c48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96e7 [ 23.929532] memcg:ffff88800dd5fa01 [ 23.929970] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.930637] page_type: 0xffffffff() [ 23.931098] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384000 dead000000000008 [ 23.932034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd5fa01 [ 23.932997] page dumped because: kasan: bad access detected [ 23.933669] [ 23.933890] Memory state around the buggy address: [ 23.934483] ffff8880096e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.935351] ffff8880096e7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.936221] >ffff8880096e7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.937091] ^ [ 23.937650] ffff8880096e7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.938524] ffff8880096e7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.939417] ================================================================== [ 23.940525] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.840856] BUG: Bad rss-counter state mm:000000005c8b3d6e type:MM_FILEPAGES val:33 [ 25.842063] BUG: Bad rss-counter state mm:000000005c8b3d6e type:MM_ANONPAGES val:22 [ 26.371288] BUG: Bad rss-counter state mm:0000000096cab747 type:MM_FILEPAGES val:33 [ 26.372433] BUG: Bad rss-counter state mm:0000000096cab747 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22682' (ECDSA) to the list of known hosts. 2023/06/21 05:40:44 fuzzer started 2023/06/21 05:40:44 dialing manager at localhost:36067 2023/06/21 05:40:44 checking machine... 2023/06/21 05:40:44 checking revisions... [ 26.993619] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:40:44 testing simple program... [ 27.036828] cgroup: Unknown subsys name 'net' [ 27.087697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:40:44 Registers: info registers vcpu 0 RAX=ffffffff818a83a4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801662fb01 RSI=ffff88801662fb08 RDI=ffff88801662fb08 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86148c40 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000237de R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801662fb10 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 00007fa5fe19a900 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=00007fa5fe74f650 CR3=00000000168c6000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c04400 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=00007fffa2c6a8c8 CR3=0000000016c04000 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=2033343a30343a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a30343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000