[ 86.411333] BUG: Bad rss-counter state mm:00000000e5ee188c type:MM_FILEPAGES val:33 [ 86.412763] BUG: Bad rss-counter state mm:00000000e5ee188c type:MM_ANONPAGES val:22 [ 86.565868] ================================================================== [ 86.566818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 86.567758] Read of size 8 at addr ffff88801bc046b0 by task sshd/219 [ 86.568623] [ 86.568840] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 86.569893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 86.570896] Call Trace: [ 86.571220] [ 86.571503] dump_stack_lvl+0x91/0xf0 [ 86.571990] print_report+0xcc/0x620 [ 86.572480] ? __virt_addr_valid+0x102/0x340 [ 86.573036] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.573676] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.574303] kasan_report+0xbe/0xf0 [ 86.574783] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.575397] vma_interval_tree_remove+0xc75/0xec0 [ 86.575998] vma_prepare+0xc54/0x11a0 [ 86.576478] __split_vma+0x5af/0x950 [ 86.576952] ? __pfx___split_vma+0x10/0x10 [ 86.577501] ? find_held_lock+0x2c/0x110 [ 86.578036] do_vmi_align_munmap+0x2ba/0x11f0 [ 86.578611] ? lock_is_held_type+0x9f/0x120 [ 86.579160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 86.579768] ? mtree_range_walk+0x632/0x900 [ 86.580326] ? mas_walk+0x5c7/0x7c0 [ 86.580802] do_vmi_munmap+0x1f1/0x2b0 [ 86.581298] mmap_region+0x1f9/0x2660 [ 86.581774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 86.582282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 86.582990] ? __pfx_lock_acquire+0x10/0x10 [ 86.583524] ? __pfx_mmap_region+0x10/0x10 [ 86.584050] ? security_mmap_addr+0x7d/0xa0 [ 86.584577] ? get_unmapped_area+0x1f5/0x3f0 [ 86.585124] do_mmap+0x854/0xf00 [ 86.585587] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.586081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 86.586640] ksys_mmap_pgoff+0x3af/0x500 [ 86.587146] do_syscall_64+0x3f/0x90 [ 86.587630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.588271] RIP: 0033:0x7fabd97f7d82 [ 86.588729] 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 [ 86.590843] RSP: 002b:00007ffc36e67038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 86.591743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabd97f7d82 [ 86.592592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabd8c31000 [ 86.593463] RBP: 00007fabd8c31000 R08: 0000000000000009 R09: 0000000000001000 [ 86.594301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645b4e8aec0 [ 86.595157] R13: 00007ffc36e67050 R14: 00007ffc36e67080 R15: 00007ffc36e673e0 [ 86.596004] [ 86.596299] [ 86.596513] Allocated by task 211: [ 86.596938] kasan_save_stack+0x22/0x50 [ 86.597455] kasan_set_track+0x25/0x30 [ 86.597947] __kasan_slab_alloc+0x59/0x70 [ 86.598468] kmem_cache_alloc+0x16b/0x370 [ 86.598980] vm_area_dup+0x20/0x160 [ 86.599433] __split_vma+0x170/0x950 [ 86.599897] split_vma+0xc6/0x110 [ 86.600343] mprotect_fixup+0x8d2/0xb30 [ 86.600842] do_mprotect_pkey+0x87e/0xd40 [ 86.601377] __x64_sys_mprotect+0x78/0xc0 [ 86.601902] do_syscall_64+0x3f/0x90 [ 86.602373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.603020] [ 86.603237] Freed by task 211: [ 86.603635] kasan_save_stack+0x22/0x50 [ 86.604135] kasan_set_track+0x25/0x30 [ 86.604628] kasan_save_free_info+0x2b/0x50 [ 86.605164] __kasan_slab_free+0x10a/0x190 [ 86.605711] kmem_cache_free+0x10d/0x4d0 [ 86.606220] rcu_core+0x8c8/0x2860 [ 86.606663] __do_softirq+0x1b7/0x7d4 [ 86.607139] [ 86.607358] Last potentially related work creation: [ 86.607943] kasan_save_stack+0x22/0x50 [ 86.608450] __kasan_record_aux_stack+0x8e/0xa0 [ 86.609037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.609711] remove_vma+0x139/0x170 [ 86.610170] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.610730] do_vmi_munmap+0x1f1/0x2b0 [ 86.611239] __vm_munmap+0x138/0x3a0 [ 86.611710] __x64_sys_munmap+0x59/0x80 [ 86.612209] do_syscall_64+0x3f/0x90 [ 86.612691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.613366] [ 86.613582] The buggy address belongs to the object at ffff88801bc04658 [ 86.613582] which belongs to the cache vm_area_struct of size 168 [ 86.615063] The buggy address is located 88 bytes inside of [ 86.615063] freed 168-byte region [ffff88801bc04658, ffff88801bc04700) [ 86.616481] [ 86.616705] The buggy address belongs to the physical page: [ 86.617379] page:0000000064eec5b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc04 [ 86.618484] memcg:ffff888019bc1e01 [ 86.618928] flags: 0x100000000000200(slab|node=0|zone=1) [ 86.619599] page_type: 0xffffffff() [ 86.620060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 86.620999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bc1e01 [ 86.621945] page dumped because: kasan: bad access detected [ 86.622633] [ 86.622856] Memory state around the buggy address: [ 86.623468] ffff88801bc04580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.624359] ffff88801bc04600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 86.625257] >ffff88801bc04680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.626143] ^ [ 86.626747] ffff88801bc04700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 86.627627] ffff88801bc04780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 86.628511] ================================================================== [ 86.629515] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 88.659700] BUG: Bad rss-counter state mm:0000000047db34ee type:MM_FILEPAGES val:33 [ 88.660900] BUG: Bad rss-counter state mm:0000000047db34ee type:MM_ANONPAGES val:22 [ 89.132368] BUG: Bad rss-counter state mm:00000000063ad2da type:MM_FILEPAGES val:33 [ 89.133580] BUG: Bad rss-counter state mm:00000000063ad2da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13205' (ECDSA) to the list of known hosts. 2023/06/20 01:41:08 fuzzer started 2023/06/20 01:41:09 dialing manager at localhost:44161 2023/06/20 01:41:09 checking machine... 2023/06/20 01:41:09 checking revisions... [ 89.850386] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:41:09 testing simple program... [ 89.896336] cgroup: Unknown subsys name 'net' [ 89.953400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:13 Registers: info registers vcpu 0 RAX=00000000fffcc626 RBX=0000000000000000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff85d3bed0 RBP=ffffffff8540a110 RSP=ffff88806ce09f80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff84532026 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb89b4eb900 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=00007fb89a94a980 CR3=000000000c6e6000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=19fda533db8e304900000000000ae988 XMM05=56a0d90e4645f22e0000000000139d00 XMM06=806171799158d9670000000000138a30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e50000 RBX=ffff888008e2d1c0 RCX=ffff888008e57920 RDX=ffff888008e57900 RSI=ffff888008e2d1c0 RDI=ffff888008e578b0 RBP=ffff888008e57900 RSP=ffff888008e57868 R8 =0000000000000130 R9 =0000000000000000 R10=ffff888008e57900 R11=0000000000000128 R12=ffff888008e578b0 R13=ffff888008e57928 R14=ffff888008e57948 R15=ffff888008e57900 RIP=ffffffff84508188 RFL=00000282 [--S----] 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 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=00007ffcb923e000 CR3=000000000cf18000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000