[ 31.716164] BUG: Bad rss-counter state mm:00000000312d3074 type:MM_FILEPAGES val:33 [ 31.717659] BUG: Bad rss-counter state mm:00000000312d3074 type:MM_ANONPAGES val:22 [ 31.881868] ================================================================== [ 31.882868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.883814] Read of size 8 at addr ffff88800de91ed8 by task sshd/225 [ 31.884602] [ 31.884823] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.885861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.886858] Call Trace: [ 31.887186] [ 31.887492] dump_stack_lvl+0x91/0xf0 [ 31.887986] print_report+0xcc/0x620 [ 31.888472] ? __virt_addr_valid+0x102/0x340 [ 31.889029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.889648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.890299] kasan_report+0xbe/0xf0 [ 31.890790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.891428] vma_interval_tree_remove+0xc75/0xec0 [ 31.892033] vma_prepare+0xc54/0x11a0 [ 31.892521] __split_vma+0x5af/0x950 [ 31.893005] ? __pfx___split_vma+0x10/0x10 [ 31.893544] ? find_held_lock+0x2c/0x110 [ 31.894071] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.894657] ? lock_is_held_type+0x9f/0x120 [ 31.895206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.895810] ? mtree_range_walk+0x632/0x900 [ 31.896373] ? mas_walk+0x5c7/0x7c0 [ 31.896855] do_vmi_munmap+0x1f1/0x2b0 [ 31.897354] mmap_region+0x1f9/0x2660 [ 31.897839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.898366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.899081] ? __pfx_lock_acquire+0x10/0x10 [ 31.899619] ? __pfx_mmap_region+0x10/0x10 [ 31.900162] ? security_mmap_addr+0x7d/0xa0 [ 31.900707] ? get_unmapped_area+0x1f5/0x3f0 [ 31.901265] do_mmap+0x854/0xf00 [ 31.901705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.902217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.902787] ksys_mmap_pgoff+0x3af/0x500 [ 31.903300] do_syscall_64+0x3f/0x90 [ 31.903783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.904448] RIP: 0033:0x7f8c408bdd82 [ 31.904920] 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 [ 31.907105] RSP: 002b:00007ffe97aed7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.908012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c408bdd82 [ 31.908865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c3fcf7000 [ 31.909715] RBP: 00007f8c3fcf7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.910583] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c81dc5f70 [ 31.911427] R13: 00007ffe97aed7f0 R14: 00007ffe97aed820 R15: 00007ffe97aedb80 [ 31.912292] [ 31.912584] [ 31.912800] Allocated by task 210: [ 31.913232] kasan_save_stack+0x22/0x50 [ 31.913745] kasan_set_track+0x25/0x30 [ 31.914257] __kasan_slab_alloc+0x59/0x70 [ 31.914788] kmem_cache_alloc+0x16b/0x370 [ 31.915313] vm_area_dup+0x20/0x160 [ 31.915777] __split_vma+0x170/0x950 [ 31.916248] split_vma+0xc6/0x110 [ 31.916689] mprotect_fixup+0x8d2/0xb30 [ 31.917195] do_mprotect_pkey+0x87e/0xd40 [ 31.917719] __x64_sys_mprotect+0x78/0xc0 [ 31.918255] do_syscall_64+0x3f/0x90 [ 31.918729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.919380] [ 31.919597] Freed by task 210: [ 31.919990] kasan_save_stack+0x22/0x50 [ 31.920496] kasan_set_track+0x25/0x30 [ 31.920988] kasan_save_free_info+0x2b/0x50 [ 31.921527] __kasan_slab_free+0x10a/0x190 [ 31.922061] kmem_cache_free+0x10d/0x4d0 [ 31.922600] rcu_core+0x8c8/0x2860 [ 31.923044] __do_softirq+0x1b7/0x7d4 [ 31.923529] [ 31.923748] Last potentially related work creation: [ 31.924339] kasan_save_stack+0x22/0x50 [ 31.924849] __kasan_record_aux_stack+0x8e/0xa0 [ 31.925434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.926078] remove_vma+0x139/0x170 [ 31.926620] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.927188] do_vmi_munmap+0x1f1/0x2b0 [ 31.927673] __vm_munmap+0x138/0x3a0 [ 31.928152] __x64_sys_munmap+0x59/0x80 [ 31.928651] do_syscall_64+0x3f/0x90 [ 31.929131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.929777] [ 31.929998] The buggy address belongs to the object at ffff88800de91e80 [ 31.929998] which belongs to the cache vm_area_struct of size 168 [ 31.931499] The buggy address is located 88 bytes inside of [ 31.931499] freed 168-byte region [ffff88800de91e80, ffff88800de91f28) [ 31.932906] [ 31.933130] The buggy address belongs to the physical page: [ 31.933785] page:00000000405034aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde91 [ 31.934883] memcg:ffff88800f590501 [ 31.935315] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.935967] page_type: 0xffffffff() [ 31.936421] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379d40 dead000000000002 [ 31.937355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f590501 [ 31.938284] page dumped because: kasan: bad access detected [ 31.938944] [ 31.939164] Memory state around the buggy address: [ 31.939754] ffff88800de91d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.940614] ffff88800de91e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.941482] >ffff88800de91e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.942351] ^ [ 31.943075] ffff88800de91f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.943928] ffff88800de91f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.944782] ================================================================== [ 31.945729] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.990410] BUG: Bad rss-counter state mm:0000000048a18e8b type:MM_FILEPAGES val:33 [ 33.991484] BUG: Bad rss-counter state mm:0000000048a18e8b type:MM_ANONPAGES val:22 [ 34.545832] BUG: Bad rss-counter state mm:000000003c345b87 type:MM_FILEPAGES val:33 [ 34.546832] BUG: Bad rss-counter state mm:000000003c345b87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12574' (ECDSA) to the list of known hosts. 2023/06/20 13:46:54 fuzzer started 2023/06/20 13:46:55 dialing manager at localhost:36067 2023/06/20 13:46:55 checking machine... 2023/06/20 13:46:55 checking revisions... [ 35.208706] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:46:55 testing simple program... [ 35.264899] cgroup: Unknown subsys name 'net' [ 35.333068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffffffff0ba7a24 RSI=ffffea000039d940 RDI=ffffffff85d3d120 RBP=ffffea000039d900 RSP=ffff888008d9fb20 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea000039d930 R11=000000000000e764 R12=0000000000000000 R13=ffffea000039d940 R14=000000000000e765 R15=ffff88807ffdc500 RIP=ffffffff81789735 RFL=00000012 [----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 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=00007f79e47bb650 CR3=00000000145a2000 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=2034353a36343a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8185af33 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888010297e01 RSI=ffff888010297e80 RDI=ffff888010297e80 RBP=ffff888010297728 RSP=ffff888010297660 R8 =ffffffff861414be R9 =ffff888010297710 R10=0000000000038001 R11=00000000000223eb R12=ffff888010297730 R13=ffff888010297718 R14=ffff888010297e88 R15=ffff8880102976d0 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 00007f00912ab900 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=00007f009073c090 CR3=000000000cae4000 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=f1337d541b809fef00000000000ae988 XMM05=17b4a624b5f0df320000000000133bd0 XMM06=ae9b264101391a5b0000000000132650 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000