[ 34.716932] BUG: Bad rss-counter state mm:0000000006f1813c type:MM_FILEPAGES val:33 [ 34.718239] BUG: Bad rss-counter state mm:0000000006f1813c type:MM_ANONPAGES val:22 [ 34.887010] ================================================================== [ 34.888291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.889397] Read of size 8 at addr ffff88800fce2968 by task sshd/220 [ 34.890362] [ 34.890580] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.891549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.892600] Call Trace: [ 34.892919] [ 34.893190] dump_stack_lvl+0x91/0xf0 [ 34.893654] print_report+0xcc/0x620 [ 34.894130] ? __virt_addr_valid+0x102/0x340 [ 34.894679] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.895372] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.896026] kasan_report+0xbe/0xf0 [ 34.896484] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.897110] vma_interval_tree_remove+0xc75/0xec0 [ 34.897791] vma_prepare+0xc54/0x11a0 [ 34.898297] __split_vma+0x5af/0x950 [ 34.898766] ? __pfx___split_vma+0x10/0x10 [ 34.899324] ? find_held_lock+0x2c/0x110 [ 34.899877] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.900556] ? lock_is_held_type+0x9f/0x120 [ 34.901130] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.901736] ? mtree_range_walk+0x632/0x900 [ 34.902355] ? mas_walk+0x5c7/0x7c0 [ 34.902863] do_vmi_munmap+0x1f1/0x2b0 [ 34.903467] mmap_region+0x1f9/0x2660 [ 34.903982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.904492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.905214] ? __pfx_lock_acquire+0x10/0x10 [ 34.905860] ? __pfx_mmap_region+0x10/0x10 [ 34.906411] ? security_mmap_addr+0x7d/0xa0 [ 34.906961] ? get_unmapped_area+0x1f5/0x3f0 [ 34.907538] do_mmap+0x854/0xf00 [ 34.908021] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.908603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.909249] ksys_mmap_pgoff+0x3af/0x500 [ 34.909768] do_syscall_64+0x3f/0x90 [ 34.910339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.911085] RIP: 0033:0x7f5324b21d82 [ 34.911557] 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 [ 34.913864] RSP: 002b:00007fff2ffd7778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.914826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5324b21d82 [ 34.915669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5323f5b000 [ 34.916630] RBP: 00007f5323f5b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.917517] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec1255cd90 [ 34.918411] R13: 00007fff2ffd7790 R14: 00007fff2ffd77c0 R15: 00007fff2ffd7b20 [ 34.919355] [ 34.919681] [ 34.919917] Allocated by task 213: [ 34.920341] kasan_save_stack+0x22/0x50 [ 34.920885] kasan_set_track+0x25/0x30 [ 34.921389] __kasan_slab_alloc+0x59/0x70 [ 34.921998] kmem_cache_alloc+0x16b/0x370 [ 34.922509] vm_area_dup+0x20/0x160 [ 34.922991] __split_vma+0x170/0x950 [ 34.923447] split_vma+0xc6/0x110 [ 34.923953] mprotect_fixup+0x8d2/0xb30 [ 34.924534] do_mprotect_pkey+0x87e/0xd40 [ 34.925081] __x64_sys_mprotect+0x78/0xc0 [ 34.925603] do_syscall_64+0x3f/0x90 [ 34.926122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.926761] [ 34.927049] Freed by task 19: [ 34.927441] kasan_save_stack+0x22/0x50 [ 34.927984] kasan_set_track+0x25/0x30 [ 34.928480] kasan_save_free_info+0x2b/0x50 [ 34.929016] __kasan_slab_free+0x10a/0x190 [ 34.929688] kmem_cache_free+0x10d/0x4d0 [ 34.930239] rcu_core+0x8c8/0x2860 [ 34.930683] __do_softirq+0x1b7/0x7d4 [ 34.931174] [ 34.931416] Last potentially related work creation: [ 34.932050] kasan_save_stack+0x22/0x50 [ 34.932668] __kasan_record_aux_stack+0x8e/0xa0 [ 34.933246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.933878] remove_vma+0x139/0x170 [ 34.934301] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.934923] do_vmi_munmap+0x1f1/0x2b0 [ 34.935384] __vm_munmap+0x138/0x3a0 [ 34.935893] __x64_sys_munmap+0x59/0x80 [ 34.936365] do_syscall_64+0x3f/0x90 [ 34.936849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.937528] [ 34.937739] The buggy address belongs to the object at ffff88800fce2910 [ 34.937739] which belongs to the cache vm_area_struct of size 168 [ 34.939181] The buggy address is located 88 bytes inside of [ 34.939181] freed 168-byte region [ffff88800fce2910, ffff88800fce29b8) [ 34.940597] [ 34.940819] The buggy address belongs to the physical page: [ 34.941444] page:000000009cd16c93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfce2 [ 34.942535] memcg:ffff888014654701 [ 34.942992] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.943649] page_type: 0xffffffff() [ 34.944086] raw: 0100000000000200 ffff88800879fc80 ffffea00003f38c0 dead000000000004 [ 34.944980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014654701 [ 34.945950] page dumped because: kasan: bad access detected [ 34.946568] [ 34.946776] Memory state around the buggy address: [ 34.947467] ffff88800fce2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.948400] ffff88800fce2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.949242] >ffff88800fce2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.950082] ^ [ 34.950910] ffff88800fce2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.951754] ffff88800fce2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.952584] ================================================================== [ 34.953581] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.312509] BUG: Bad rss-counter state mm:00000000d8db4219 type:MM_FILEPAGES val:33 [ 37.313899] BUG: Bad rss-counter state mm:00000000d8db4219 type:MM_ANONPAGES val:22 [ 37.808802] BUG: Bad rss-counter state mm:000000002493f60a type:MM_FILEPAGES val:33 [ 37.810032] BUG: Bad rss-counter state mm:000000002493f60a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40712' (ECDSA) to the list of known hosts. 2023/06/19 12:27:30 fuzzer started 2023/06/19 12:27:30 dialing manager at localhost:44161 2023/06/19 12:27:30 checking machine... 2023/06/19 12:27:30 checking revisions... [ 38.483761] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:27:31 testing simple program... [ 38.528467] cgroup: Unknown subsys name 'net' [ 38.565685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110032413d5 RSI=ffffffff8486f160 RDI=ffff888019209ea8 RBP=ffff888019209e90 RSP=ffff888016517cf0 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888019209e67 R11=0000000000000000 R12=ffffffff870a55a0 R13=0000000000000000 R14=ffffffff87b67200 R15=0000000000000000 RIP=ffffffff812db3a4 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 00007f2528abf900 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=00007f2529074650 CR3=000000000eff4000 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=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=0000000016ef04c0 RSP=ffff88801964f808 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0030733a745f6c65 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=0000000000000000 R15=00007fb0192bd880 RIP=ffffffff81143263 RFL=00000246 [---Z-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0192c1700 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=00007fa58649af20 CR3=0000000016b70000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000