[ 30.678176] BUG: Bad rss-counter state mm:000000007d6ba329 type:MM_FILEPAGES val:33 [ 30.679406] BUG: Bad rss-counter state mm:000000007d6ba329 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.880769] ================================================================== [ 30.881353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881943] Read of size 8 at addr ffff888009f624e0 by task sshd/220 [ 30.882462] [ 30.882604] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.883154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.883792] Call Trace: [ 30.883997] [ 30.884180] dump_stack_lvl+0x91/0xf0 [ 30.884488] print_report+0xcc/0x620 [ 30.884846] ? __virt_addr_valid+0x102/0x340 [ 30.885198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885588] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885980] kasan_report+0xbe/0xf0 [ 30.894330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894705] vma_interval_tree_remove+0xc75/0xec0 [ 30.895076] vma_prepare+0xc54/0x11a0 [ 30.895371] __split_vma+0x5af/0x950 [ 30.895686] ? __pfx___split_vma+0x10/0x10 [ 30.896012] ? find_held_lock+0x2c/0x110 [ 30.896334] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.896688] ? lock_is_held_type+0x9f/0x120 [ 30.897022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.897397] ? mtree_range_walk+0x632/0x900 [ 30.897749] ? mas_walk+0x5c7/0x7c0 [ 30.898046] do_vmi_munmap+0x1f1/0x2b0 [ 30.898465] mmap_region+0x1f9/0x2660 [ 30.898779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.899103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.899540] ? __pfx_lock_acquire+0x10/0x10 [ 30.899879] ? __pfx_mmap_region+0x10/0x10 [ 30.900208] ? security_mmap_addr+0x7d/0xa0 [ 30.900563] ? get_unmapped_area+0x1f5/0x3f0 [ 30.900906] do_mmap+0x854/0xf00 [ 30.901176] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.901482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.901876] ksys_mmap_pgoff+0x3af/0x500 [ 30.902191] do_syscall_64+0x3f/0x90 [ 30.902524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902925] RIP: 0033:0x7fd563574d82 [ 30.903209] 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 [ 30.904527] RSP: 002b:00007fff07d6ab08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.905125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd563574d82 [ 30.905646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5629ae000 [ 30.906162] RBP: 00007fd5629ae000 R08: 0000000000000009 R09: 0000000000001000 [ 30.906716] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557136023ec0 [ 30.907238] R13: 00007fff07d6ab20 R14: 00007fff07d6ab50 R15: 00007fff07d6aeb0 [ 30.907764] [ 30.907946] [ 30.908079] Allocated by task 213: [ 30.908346] kasan_save_stack+0x22/0x50 [ 30.908664] kasan_set_track+0x25/0x30 [ 30.908969] __kasan_slab_alloc+0x59/0x70 [ 30.909293] kmem_cache_alloc+0x16b/0x370 [ 30.909611] vm_area_dup+0x20/0x160 [ 30.909901] __split_vma+0x170/0x950 [ 30.910192] split_vma+0xc6/0x110 [ 30.910508] mprotect_fixup+0x8d2/0xb30 [ 30.910841] do_mprotect_pkey+0x87e/0xd40 [ 30.911163] __x64_sys_mprotect+0x78/0xc0 [ 30.911487] do_syscall_64+0x3f/0x90 [ 30.911790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912190] [ 30.912325] Freed by task 13: [ 30.912585] kasan_save_stack+0x22/0x50 [ 30.912904] kasan_set_track+0x25/0x30 [ 30.913212] kasan_save_free_info+0x2b/0x50 [ 30.913540] __kasan_slab_free+0x10a/0x190 [ 30.913911] kmem_cache_free+0x10d/0x4d0 [ 30.914225] rcu_core+0x8c8/0x2860 [ 30.914533] __do_softirq+0x1b7/0x7d4 [ 30.914830] [ 30.914965] Last potentially related work creation: [ 30.915326] kasan_save_stack+0x22/0x50 [ 30.915669] __kasan_record_aux_stack+0x8e/0xa0 [ 30.916019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.916415] remove_vma+0x139/0x170 [ 30.916728] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.917083] do_vmi_munmap+0x1f1/0x2b0 [ 30.917384] __vm_munmap+0x138/0x3a0 [ 30.917702] __x64_sys_munmap+0x59/0x80 [ 30.918007] do_syscall_64+0x3f/0x90 [ 30.918331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.918767] [ 30.918906] The buggy address belongs to the object at ffff888009f62488 [ 30.918906] which belongs to the cache vm_area_struct of size 168 [ 30.919808] The buggy address is located 88 bytes inside of [ 30.919808] freed 168-byte region [ffff888009f62488, ffff888009f62530) [ 30.920668] [ 30.920801] The buggy address belongs to the physical page: [ 30.921202] page:000000006509e01b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f62 [ 30.921867] memcg:ffff888016f96101 [ 30.922129] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.922583] page_type: 0xffffffff() [ 30.922861] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.923418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f96101 [ 30.923978] page dumped because: kasan: bad access detected [ 30.924386] [ 30.924521] Memory state around the buggy address: [ 30.924880] ffff888009f62380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.925402] ffff888009f62400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.925932] >ffff888009f62480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.926628] ^ [ 30.927175] ffff888009f62500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.927753] ffff888009f62580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928288] ================================================================== [ 30.929075] Disabling lock debugging due to kernel taint [ 36.583640] BUG: Bad rss-counter state mm:00000000bb90d379 type:MM_FILEPAGES val:33 [ 36.584349] BUG: Bad rss-counter state mm:00000000bb90d379 type:MM_ANONPAGES val:22 [ 37.933175] BUG: Bad rss-counter state mm:000000001efda95c type:MM_FILEPAGES val:33 [ 37.934455] BUG: Bad rss-counter state mm:000000001efda95c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16809' (ECDSA) to the list of known hosts. 2023/06/20 10:17:26 fuzzer started 2023/06/20 10:17:26 dialing manager at localhost:44161 2023/06/20 10:17:26 checking machine... 2023/06/20 10:17:26 checking revisions... [ 38.892955] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:17:26 testing simple program... [ 38.931658] cgroup: Unknown subsys name 'net' [ 39.013527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:17:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015a6f920 RCX=0000000000000001 RDX=1ffff11002b4df26 RSI=ffffffff84506c7f RDI=ffff888015a6f930 RBP=ffff888015a6f8f0 RSP=ffff888015a6f838 R8 =0000000000000001 R9 =ffff888015a6f898 R10=0000000000038001 R11=000000000000774d R12=ffff888015a6f920 R13=0000000000000000 R14=ffff888015829b40 R15=ffff888009ba9080 RIP=ffffffff813ad446 RFL=00000292 [--S-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=00007f17a30e2000 CR3=0000000013ab0000 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=468e5d6f719bcf863047fca08039fc71 XMM02=ec2efd57dc4c00df000000000011f888 XMM03=bdc6ce3706e8c6d6000000000011f958 XMM04=cf699ac79069f0bb00000000000ae988 XMM05=f698c8f68cd83dba00000000001345e8 XMM06=19e9129bd510f2350000000000133318 XMM07=139997807ff5a4420000000000124fc8 XMM08=e1353cc91df538a700000000001245d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2f13 RBX=ffffffff85d97898 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d97888 RSP=ffff88806cf099e0 R8 =ffffffff8609fada R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d97888 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 00007f2dc9492900 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=00007f936edf4328 CR3=00000000169ea000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000