[ 27.724495] BUG: Bad rss-counter state mm:000000000ae14d12 type:MM_FILEPAGES val:33 [ 27.725978] BUG: Bad rss-counter state mm:000000000ae14d12 type:MM_ANONPAGES val:22 [ 27.864891] ================================================================== [ 27.865848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.866855] Read of size 8 at addr ffff88800deefa50 by task sshd/218 [ 27.867675] [ 27.867906] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.868894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.869930] Call Trace: [ 27.870278] [ 27.870585] dump_stack_lvl+0x91/0xf0 [ 27.871137] print_report+0xcc/0x620 [ 27.871660] ? __virt_addr_valid+0x102/0x340 [ 27.872261] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.872912] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.873565] kasan_report+0xbe/0xf0 [ 27.874078] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.874744] vma_interval_tree_remove+0xc75/0xec0 [ 27.875409] vma_prepare+0xc54/0x11a0 [ 27.875919] __split_vma+0x5af/0x950 [ 27.876420] ? __pfx___split_vma+0x10/0x10 [ 27.876981] ? find_held_lock+0x2c/0x110 [ 27.877544] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.878148] ? lock_is_held_type+0x9f/0x120 [ 27.878742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.879413] ? mtree_range_walk+0x632/0x900 [ 27.880008] ? mas_walk+0x5c7/0x7c0 [ 27.880519] do_vmi_munmap+0x1f1/0x2b0 [ 27.881041] mmap_region+0x1f9/0x2660 [ 27.881555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.882106] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.882904] ? __pfx_lock_acquire+0x10/0x10 [ 27.883467] ? __pfx_mmap_region+0x10/0x10 [ 27.884033] ? security_mmap_addr+0x7d/0xa0 [ 27.884609] ? get_unmapped_area+0x1f5/0x3f0 [ 27.885207] do_mmap+0x854/0xf00 [ 27.885675] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.886209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.886821] ksys_mmap_pgoff+0x3af/0x500 [ 27.887368] do_syscall_64+0x3f/0x90 [ 27.887885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.888578] RIP: 0033:0x7f228a16cd82 [ 27.889063] 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 [ 27.891362] RSP: 002b:00007ffe81d48748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.892339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f228a16cd82 [ 27.893255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22895a6000 [ 27.894156] RBP: 00007f22895a6000 R08: 0000000000000009 R09: 0000000000001000 [ 27.895087] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ed38f0f70 [ 27.896006] R13: 00007ffe81d48760 R14: 00007ffe81d48790 R15: 00007ffe81d48af0 [ 27.896931] [ 27.897245] [ 27.897476] Allocated by task 211: [ 27.897927] kasan_save_stack+0x22/0x50 [ 27.898469] kasan_set_track+0x25/0x30 [ 27.899011] __kasan_slab_alloc+0x59/0x70 [ 27.899589] kmem_cache_alloc+0x16b/0x370 [ 27.900142] vm_area_dup+0x20/0x160 [ 27.900628] __split_vma+0x170/0x950 [ 27.901121] split_vma+0xc6/0x110 [ 27.901588] mprotect_fixup+0x8d2/0xb30 [ 27.902128] do_mprotect_pkey+0x87e/0xd40 [ 27.902685] __x64_sys_mprotect+0x78/0xc0 [ 27.903249] do_syscall_64+0x3f/0x90 [ 27.903749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.904444] [ 27.904675] Freed by task 211: [ 27.905111] kasan_save_stack+0x22/0x50 [ 27.905651] kasan_set_track+0x25/0x30 [ 27.906188] kasan_save_free_info+0x2b/0x50 [ 27.906761] __kasan_slab_free+0x10a/0x190 [ 27.907342] kmem_cache_free+0x10d/0x4d0 [ 27.907881] rcu_core+0x8c8/0x2860 [ 27.908349] __do_softirq+0x1b7/0x7d4 [ 27.908861] [ 27.909087] Last potentially related work creation: [ 27.909712] kasan_save_stack+0x22/0x50 [ 27.910262] __kasan_record_aux_stack+0x8e/0xa0 [ 27.910887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.911578] remove_vma+0x139/0x170 [ 27.912066] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.912667] do_vmi_munmap+0x1f1/0x2b0 [ 27.913191] __vm_munmap+0x138/0x3a0 [ 27.913686] __x64_sys_munmap+0x59/0x80 [ 27.914217] do_syscall_64+0x3f/0x90 [ 27.914729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.915422] [ 27.915655] Second to last potentially related work creation: [ 27.916388] kasan_save_stack+0x22/0x50 [ 27.916928] __kasan_record_aux_stack+0x8e/0xa0 [ 27.917542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.918245] remove_vma+0x139/0x170 [ 27.918729] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.919335] do_vmi_munmap+0x1f1/0x2b0 [ 27.919859] mmap_region+0x1f9/0x2660 [ 27.920373] do_mmap+0x854/0xf00 [ 27.920843] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.921376] ksys_mmap_pgoff+0x3af/0x500 [ 27.921916] do_syscall_64+0x3f/0x90 [ 27.922412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.923113] [ 27.923356] The buggy address belongs to the object at ffff88800deef9f8 [ 27.923356] which belongs to the cache vm_area_struct of size 168 [ 27.924922] The buggy address is located 88 bytes inside of [ 27.924922] freed 168-byte region [ffff88800deef9f8, ffff88800deefaa0) [ 27.926409] [ 27.926648] The buggy address belongs to the physical page: [ 27.927349] page:000000003d6f2502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeef [ 27.928501] memcg:ffff88800d377d01 [ 27.928958] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.929654] page_type: 0xffffffff() [ 27.930131] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 27.931112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d377d01 [ 27.932074] page dumped because: kasan: bad access detected [ 27.932764] [ 27.932992] Memory state around the buggy address: [ 27.933610] ffff88800deef900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.934512] ffff88800deef980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 27.935444] >ffff88800deefa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.936346] ^ [ 27.937089] ffff88800deefa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 27.938018] ffff88800deefb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.938947] ================================================================== [ 27.940091] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.791524] BUG: Bad rss-counter state mm:0000000089d807fc type:MM_FILEPAGES val:33 [ 29.792488] BUG: Bad rss-counter state mm:0000000089d807fc type:MM_ANONPAGES val:22 [ 30.349939] BUG: Bad rss-counter state mm:00000000fbe88c0e type:MM_FILEPAGES val:33 [ 30.351113] BUG: Bad rss-counter state mm:00000000fbe88c0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17401' (ECDSA) to the list of known hosts. 2023/06/19 17:52:49 fuzzer started 2023/06/19 17:52:49 dialing manager at localhost:44161 2023/06/19 17:52:49 checking machine... 2023/06/19 17:52:49 checking revisions... [ 30.964543] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:52:49 testing simple program... [ 31.008599] cgroup: Unknown subsys name 'net' [ 31.051969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffccb96b5f8 CR3=0000000005482000 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=00007f5cc7c3651000005571219c0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf39500 RBX=0000000000000001 RCX=ffff88806cf395dc RDX=ffff88806cf395dc RSI=0000000000000000 RDI=ffff888010243770 RBP=0000000000100000 RSP=ffff8880147d7990 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff8126100a RFL=00000046 [---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 00007f258e067900 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=00007f258d4a71c0 CR3=000000000ca24000 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=19ca7edc033b9b809942603c337e67c9 XMM02=ec2efd57dc4c00df000000000011f8f0 XMM03=4ba86530266a41c0000000000011f9c0 XMM04=8f023bda1c85b80900000000000ae988 XMM05=955f934f0a0fdc1a0000000000134a98 XMM06=bdf2e299e47b49d50000000000134120 XMM07=e042d86d42eb936e00000000001238e0 XMM08=4ba86530266a41c0000000000011f9c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000