[ 30.216523] BUG: Bad rss-counter state mm:00000000d059d0d0 type:MM_FILEPAGES val:33 [ 30.217518] BUG: Bad rss-counter state mm:00000000d059d0d0 type:MM_ANONPAGES val:22 [ 30.379382] ================================================================== [ 30.380460] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.381576] Read of size 8 at addr ffff8880181db140 by task sshd/229 [ 30.382643] [ 30.382911] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.383941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.385151] Call Trace: [ 30.385535] [ 30.385922] dump_stack_lvl+0x91/0xf0 [ 30.386507] print_report+0xcc/0x620 [ 30.386996] ? __virt_addr_valid+0x102/0x340 [ 30.387547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388168] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388782] kasan_report+0xbe/0xf0 [ 30.389259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.389887] vma_interval_tree_remove+0xc75/0xec0 [ 30.390485] vma_prepare+0xc54/0x11a0 [ 30.390965] __split_vma+0x5af/0x950 [ 30.391438] ? __pfx___split_vma+0x10/0x10 [ 30.391963] ? find_held_lock+0x2c/0x110 [ 30.392481] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.393046] ? lock_is_held_type+0x9f/0x120 [ 30.393586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.394195] ? mtree_range_walk+0x632/0x900 [ 30.394752] ? mas_walk+0x5c7/0x7c0 [ 30.395230] do_vmi_munmap+0x1f1/0x2b0 [ 30.395723] mmap_region+0x1f9/0x2660 [ 30.396202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.396713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.397423] ? __pfx_lock_acquire+0x10/0x10 [ 30.397977] ? __pfx_mmap_region+0x10/0x10 [ 30.398508] ? security_mmap_addr+0x7d/0xa0 [ 30.399035] ? get_unmapped_area+0x1f5/0x3f0 [ 30.399584] do_mmap+0x854/0xf00 [ 30.400018] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.400506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.401069] ksys_mmap_pgoff+0x3af/0x500 [ 30.401577] do_syscall_64+0x3f/0x90 [ 30.402068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402718] RIP: 0033:0x7f1445f67d82 [ 30.403170] 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 [ 30.405281] RSP: 002b:00007fffec146bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.406190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1445f67d82 [ 30.407029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14453a1000 [ 30.407875] RBP: 00007f14453a1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.408718] R10: 0000000000000812 R11: 0000000000000206 R12: 000056237033cb20 [ 30.409554] R13: 00007fffec146be0 R14: 00007fffec146c10 R15: 00007fffec146f70 [ 30.410409] [ 30.410701] [ 30.410919] Allocated by task 219: [ 30.411345] kasan_save_stack+0x22/0x50 [ 30.411850] kasan_set_track+0x25/0x30 [ 30.412343] __kasan_slab_alloc+0x59/0x70 [ 30.412871] kmem_cache_alloc+0x16b/0x370 [ 30.413385] vm_area_dup+0x20/0x160 [ 30.413842] __split_vma+0x170/0x950 [ 30.414309] split_vma+0xc6/0x110 [ 30.414746] mprotect_fixup+0x8d2/0xb30 [ 30.415244] do_mprotect_pkey+0x87e/0xd40 [ 30.415762] __x64_sys_mprotect+0x78/0xc0 [ 30.416284] do_syscall_64+0x3f/0x90 [ 30.416755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.417396] [ 30.417615] Freed by task 19: [ 30.418023] kasan_save_stack+0x22/0x50 [ 30.418524] kasan_set_track+0x25/0x30 [ 30.419016] kasan_save_free_info+0x2b/0x50 [ 30.419540] __kasan_slab_free+0x10a/0x190 [ 30.420072] kmem_cache_free+0x10d/0x4d0 [ 30.420583] rcu_core+0x8c8/0x2860 [ 30.421032] __do_softirq+0x1b7/0x7d4 [ 30.421510] [ 30.421731] Last potentially related work creation: [ 30.422314] kasan_save_stack+0x22/0x50 [ 30.422872] __kasan_record_aux_stack+0x8e/0xa0 [ 30.423462] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.424098] remove_vma+0x139/0x170 [ 30.424550] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.425112] do_vmi_munmap+0x1f1/0x2b0 [ 30.425597] __vm_munmap+0x138/0x3a0 [ 30.426084] __x64_sys_munmap+0x59/0x80 [ 30.426584] do_syscall_64+0x3f/0x90 [ 30.427058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.427700] [ 30.427917] The buggy address belongs to the object at ffff8880181db0e8 [ 30.427917] which belongs to the cache vm_area_struct of size 168 [ 30.429379] The buggy address is located 88 bytes inside of [ 30.429379] freed 168-byte region [ffff8880181db0e8, ffff8880181db190) [ 30.430788] [ 30.431005] The buggy address belongs to the physical page: [ 30.431661] page:000000006dcfb5a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181db [ 30.432737] memcg:ffff88800e7f0c01 [ 30.433161] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.433809] page_type: 0xffffffff() [ 30.434258] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.435169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f0c01 [ 30.436063] page dumped because: kasan: bad access detected [ 30.436723] [ 30.436938] Memory state around the buggy address: [ 30.437514] ffff8880181db000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.438380] ffff8880181db080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.439234] >ffff8880181db100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440083] ^ [ 30.440713] ffff8880181db180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.441567] ffff8880181db200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.442419] ================================================================== [ 30.443332] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.672326] BUG: Bad rss-counter state mm:000000002906c096 type:MM_FILEPAGES val:33 [ 32.673924] BUG: Bad rss-counter state mm:000000002906c096 type:MM_ANONPAGES val:22 [ 33.122457] BUG: Bad rss-counter state mm:000000003c26b115 type:MM_FILEPAGES val:33 [ 33.123457] BUG: Bad rss-counter state mm:000000003c26b115 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56389' (ECDSA) to the list of known hosts. 2023/06/20 23:24:41 fuzzer started 2023/06/20 23:24:41 dialing manager at localhost:36067 2023/06/20 23:24:41 checking machine... 2023/06/20 23:24:41 checking revisions... [ 33.826938] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:24:41 testing simple program... [ 33.873812] cgroup: Unknown subsys name 'net' [ 33.935159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:24:41 Registers: info registers vcpu 0 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff8604ebc4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b2008 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a72 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 00007fe3a6fb4900 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=00007fe3a756c0b0 CR3=000000000e42a000 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=2031343a34323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f7828ce5020 CR3=000000000f29e000 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=b9f6147b5b555c85494ef5c2e5f8ba35 XMM02=ec2efd57dc4c00df000000000011d690 XMM03=b5266b6e2069aa7c000000000011d760 XMM04=47b5957a71a06dd400000000000ae988 XMM05=c7e794ddcdda30e30000000000133788 XMM06=8fede82a5ad58cbe00000000001324b8 XMM07=e042d86d42eb936e0000000000123440 XMM08=b5266b6e2069aa7c000000000011d760 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000