[ 34.213952] BUG: Bad rss-counter state mm:00000000fc696ebd type:MM_FILEPAGES val:33 [ 34.215130] BUG: Bad rss-counter state mm:00000000fc696ebd type:MM_ANONPAGES val:22 [ 34.263623] ================================================================== [ 34.264322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.265061] Read of size 8 at addr ffff88801625ed08 by task sshd/219 [ 34.265646] [ 34.265817] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.266473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.267226] Call Trace: [ 34.267469] [ 34.267691] dump_stack_lvl+0x91/0xf0 [ 34.268172] print_report+0xcc/0x620 [ 34.268576] ? __virt_addr_valid+0x102/0x340 [ 34.268998] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.269477] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.269947] kasan_report+0xbe/0xf0 [ 34.270303] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.270790] vma_interval_tree_remove+0xc75/0xec0 [ 34.271250] vma_prepare+0xc54/0x11a0 [ 34.271614] __split_vma+0x5af/0x950 [ 34.271980] ? __pfx___split_vma+0x10/0x10 [ 34.272382] ? find_held_lock+0x2c/0x110 [ 34.272785] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.273227] ? lock_is_held_type+0x9f/0x120 [ 34.273641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.274113] ? mtree_range_walk+0x632/0x900 [ 34.274565] ? mas_walk+0x5c7/0x7c0 [ 34.274947] do_vmi_munmap+0x1f1/0x2b0 [ 34.275336] mmap_region+0x1f9/0x2660 [ 34.275724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.276119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.276671] ? __pfx_lock_acquire+0x10/0x10 [ 34.277097] ? __pfx_mmap_region+0x10/0x10 [ 34.277505] ? security_mmap_addr+0x7d/0xa0 [ 34.277922] ? get_unmapped_area+0x1f5/0x3f0 [ 34.278345] do_mmap+0x854/0xf00 [ 34.278681] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.279062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.279495] ksys_mmap_pgoff+0x3af/0x500 [ 34.279889] do_syscall_64+0x3f/0x90 [ 34.280257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.280752] RIP: 0033:0x7f89f3b24d82 [ 34.281105] 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 [ 34.282751] RSP: 002b:00007ffdf698d808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.283451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89f3b24d82 [ 34.284109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89f2f5e000 [ 34.284764] RBP: 00007f89f2f5e000 R08: 0000000000000009 R09: 0000000000001000 [ 34.285424] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559274a79f70 [ 34.286080] R13: 00007ffdf698d820 R14: 00007ffdf698d850 R15: 00007ffdf698dbb0 [ 34.286744] [ 34.286968] [ 34.287133] Allocated by task 212: [ 34.287463] kasan_save_stack+0x22/0x50 [ 34.287845] kasan_set_track+0x25/0x30 [ 34.288220] __kasan_slab_alloc+0x59/0x70 [ 34.288619] kmem_cache_alloc+0x16b/0x370 [ 34.289029] vm_area_dup+0x20/0x160 [ 34.289381] __split_vma+0x170/0x950 [ 34.289742] split_vma+0xc6/0x110 [ 34.290078] mprotect_fixup+0x8d2/0xb30 [ 34.290467] do_mprotect_pkey+0x87e/0xd40 [ 34.290874] __x64_sys_mprotect+0x78/0xc0 [ 34.291273] do_syscall_64+0x3f/0x90 [ 34.291634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.292127] [ 34.292292] Freed by task 203: [ 34.292594] kasan_save_stack+0x22/0x50 [ 34.292977] kasan_set_track+0x25/0x30 [ 34.293363] kasan_save_free_info+0x2b/0x50 [ 34.293776] __kasan_slab_free+0x10a/0x190 [ 34.294185] kmem_cache_free+0x10d/0x4d0 [ 34.294575] rcu_core+0x8c8/0x2860 [ 34.294918] __do_softirq+0x1b7/0x7d4 [ 34.295283] [ 34.295451] Last potentially related work creation: [ 34.295901] kasan_save_stack+0x22/0x50 [ 34.296286] __kasan_record_aux_stack+0x8e/0xa0 [ 34.296727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.297234] remove_vma+0x139/0x170 [ 34.297580] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.298006] do_vmi_munmap+0x1f1/0x2b0 [ 34.298378] __vm_munmap+0x138/0x3a0 [ 34.298734] __x64_sys_munmap+0x59/0x80 [ 34.299116] do_syscall_64+0x3f/0x90 [ 34.299475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.299964] [ 34.300128] The buggy address belongs to the object at ffff88801625ecb0 [ 34.300128] which belongs to the cache vm_area_struct of size 168 [ 34.301260] The buggy address is located 88 bytes inside of [ 34.301260] freed 168-byte region [ffff88801625ecb0, ffff88801625ed58) [ 34.302343] [ 34.302509] The buggy address belongs to the physical page: [ 34.303017] page:00000000cace58eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1625e [ 34.303856] memcg:ffff88800d6df001 [ 34.304180] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.304710] page_type: 0xffffffff() [ 34.305066] raw: 0100000000000200 ffff88800879fc80 ffffea000025c980 dead000000000003 [ 34.305769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6df001 [ 34.306460] page dumped because: kasan: bad access detected [ 34.306969] [ 34.307131] Memory state around the buggy address: [ 34.307584] ffff88801625ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.308236] ffff88801625ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.308891] >ffff88801625ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.309546] ^ [ 34.309882] ffff88801625ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.310539] ffff88801625ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.311186] ================================================================== [ 34.311875] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.947235] BUG: Bad rss-counter state mm:000000002279190e type:MM_FILEPAGES val:33 [ 35.948287] BUG: Bad rss-counter state mm:000000002279190e type:MM_ANONPAGES val:22 [ 36.358771] BUG: Bad rss-counter state mm:000000009aa36625 type:MM_FILEPAGES val:33 [ 36.359833] BUG: Bad rss-counter state mm:000000009aa36625 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43366' (ECDSA) to the list of known hosts. 2023/06/19 14:20:27 fuzzer started 2023/06/19 14:20:27 dialing manager at localhost:44161 2023/06/19 14:20:27 checking machine... 2023/06/19 14:20:27 checking revisions... [ 37.001046] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:20:27 testing simple program... [ 37.040521] cgroup: Unknown subsys name 'net' [ 37.074192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:23 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=00007faa0337b5e0 CR3=000000000fe2a000 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=2036323a30323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f14fbc8 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880198c6ed8 RSI=0000000000000007 RDI=ffff8880198c6ed8 RBP=ffff8880198c6e00 RSP=ffff88800f14fb60 R8 =0000000000000001 R9 =ffffed1001e29f7c R10=0000000000000003 R11=00000000000b6996 R12=ffff8880198c6e88 R13=ffff8880198c6e28 R14=ffff8880198c6ed8 R15=ffff8880198c6ed8 RIP=ffffffff8129ebe4 RFL=00000293 [--S-A-C] 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 00007f41a8d07900 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=00007fff9a593000 CR3=000000000e00e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000