[ 31.113329] BUG: Bad rss-counter state mm:00000000dec6155a type:MM_FILEPAGES val:33 [ 31.114749] BUG: Bad rss-counter state mm:00000000dec6155a type:MM_ANONPAGES val:22 [ 31.269967] ================================================================== [ 31.271038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.272279] Read of size 8 at addr ffff88800e1bd6b0 by task sshd/220 [ 31.273081] [ 31.273334] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.274275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.275298] Call Trace: [ 31.275641] [ 31.275948] dump_stack_lvl+0x91/0xf0 [ 31.276466] print_report+0xcc/0x620 [ 31.276976] ? __virt_addr_valid+0x102/0x340 [ 31.277570] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278221] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278873] kasan_report+0xbe/0xf0 [ 31.279376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280043] vma_interval_tree_remove+0xc75/0xec0 [ 31.280692] vma_prepare+0xc54/0x11a0 [ 31.281219] __split_vma+0x5af/0x950 [ 31.281718] ? __pfx___split_vma+0x10/0x10 [ 31.282276] ? find_held_lock+0x2c/0x110 [ 31.282829] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.283427] ? lock_is_held_type+0x9f/0x120 [ 31.283990] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.284624] ? mtree_range_walk+0x632/0x900 [ 31.285219] ? mas_walk+0x5c7/0x7c0 [ 31.285719] do_vmi_munmap+0x1f1/0x2b0 [ 31.286242] mmap_region+0x1f9/0x2660 [ 31.286753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288046] ? __pfx_lock_acquire+0x10/0x10 [ 31.288609] ? __pfx_mmap_region+0x10/0x10 [ 31.289186] ? security_mmap_addr+0x7d/0xa0 [ 31.289749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290331] do_mmap+0x854/0xf00 [ 31.290796] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.291913] ksys_mmap_pgoff+0x3af/0x500 [ 31.292448] do_syscall_64+0x3f/0x90 [ 31.292954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293640] RIP: 0033:0x7fb45c7c8d82 [ 31.294129] 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 [ 31.296373] RSP: 002b:00007fff189d5eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb45c7c8d82 [ 31.298247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb45bc02000 [ 31.299135] RBP: 00007fb45bc02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300028] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558989109ec0 [ 31.300920] R13: 00007fff189d5ed0 R14: 00007fff189d5f00 R15: 00007fff189d6260 [ 31.301836] [ 31.302150] [ 31.302375] Allocated by task 211: [ 31.302834] kasan_save_stack+0x22/0x50 [ 31.303365] kasan_set_track+0x25/0x30 [ 31.303903] __kasan_slab_alloc+0x59/0x70 [ 31.304461] kmem_cache_alloc+0x16b/0x370 [ 31.305016] vm_area_dup+0x20/0x160 [ 31.305517] __split_vma+0x170/0x950 [ 31.306011] split_vma+0xc6/0x110 [ 31.306475] mprotect_fixup+0x8d2/0xb30 [ 31.307007] do_mprotect_pkey+0x87e/0xd40 [ 31.307575] __x64_sys_mprotect+0x78/0xc0 [ 31.308137] do_syscall_64+0x3f/0x90 [ 31.308661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309354] [ 31.309588] Freed by task 211: [ 31.310005] kasan_save_stack+0x22/0x50 [ 31.310552] kasan_set_track+0x25/0x30 [ 31.311089] kasan_save_free_info+0x2b/0x50 [ 31.311661] __kasan_slab_free+0x10a/0x190 [ 31.312226] kmem_cache_free+0x10d/0x4d0 [ 31.312763] rcu_core+0x8c8/0x2860 [ 31.313245] __do_softirq+0x1b7/0x7d4 [ 31.313756] [ 31.313982] Last potentially related work creation: [ 31.314601] kasan_save_stack+0x22/0x50 [ 31.315135] __kasan_record_aux_stack+0x8e/0xa0 [ 31.315739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.316420] remove_vma+0x139/0x170 [ 31.316894] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.317502] do_vmi_munmap+0x1f1/0x2b0 [ 31.318010] __vm_munmap+0x138/0x3a0 [ 31.318505] __x64_sys_munmap+0x59/0x80 [ 31.319024] do_syscall_64+0x3f/0x90 [ 31.319527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320205] [ 31.320434] Second to last potentially related work creation: [ 31.321180] kasan_save_stack+0x22/0x50 [ 31.321715] __kasan_record_aux_stack+0x8e/0xa0 [ 31.322318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323039] remove_vma+0x139/0x170 [ 31.323514] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324105] do_vmi_munmap+0x1f1/0x2b0 [ 31.324616] mmap_region+0x1f9/0x2660 [ 31.325124] do_mmap+0x854/0xf00 [ 31.325600] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.326125] ksys_mmap_pgoff+0x7d/0x500 [ 31.326646] do_syscall_64+0x3f/0x90 [ 31.327153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327825] [ 31.328054] The buggy address belongs to the object at ffff88800e1bd658 [ 31.328054] which belongs to the cache vm_area_struct of size 168 [ 31.329634] The buggy address is located 88 bytes inside of [ 31.329634] freed 168-byte region [ffff88800e1bd658, ffff88800e1bd700) [ 31.331126] [ 31.331367] The buggy address belongs to the physical page: [ 31.332072] page:00000000da82d6c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1bd [ 31.333235] memcg:ffff88800e018501 [ 31.333689] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.334381] page_type: 0xffffffff() [ 31.334855] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fb480 dead000000000006 [ 31.335820] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e018501 [ 31.336775] page dumped because: kasan: bad access detected [ 31.337495] [ 31.337724] Memory state around the buggy address: [ 31.338334] ffff88800e1bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.339239] ffff88800e1bd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.340142] >ffff88800e1bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341040] ^ [ 31.341656] ffff88800e1bd700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.342559] ffff88800e1bd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.343451] ================================================================== [ 31.344530] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.179975] BUG: Bad rss-counter state mm:00000000db6db1aa type:MM_FILEPAGES val:33 [ 33.180739] BUG: Bad rss-counter state mm:00000000db6db1aa type:MM_ANONPAGES val:22 [ 33.601096] BUG: Bad rss-counter state mm:0000000053018817 type:MM_FILEPAGES val:33 [ 33.602115] BUG: Bad rss-counter state mm:0000000053018817 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61581' (ECDSA) to the list of known hosts. 2023/06/20 20:37:44 fuzzer started 2023/06/20 20:37:45 dialing manager at localhost:36067 2023/06/20 20:37:45 checking machine... 2023/06/20 20:37:45 checking revisions... [ 34.335078] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:37:45 testing simple program... [ 34.390804] cgroup: Unknown subsys name 'net' [ 34.445797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff88800e3cb680 RSI=ffffffff83723ca5 RDI=0000000000000005 RBP=0000000000000011 RSP=ffff888017e1f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99b60 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b 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 00007f314b406900 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=00007f314b9bd618 CR3=000000000c6e8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000ce95d932 RCX=ffff88806c6ec990 RDX=000000000000000e RSI=0000000000000001 RDI=000000009f03326b RBP=ffff88800f2e7eb0 RSP=ffff888016b5f618 R8 =00000000218fa724 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888016b5f680 R15=000000000000000e RIP=ffffffff822704d3 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 00007fa4e487d700 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=00007f01a36f2040 CR3=000000000eb18000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000