syzkaller login: [ 31.141845] BUG: Bad rss-counter state mm:00000000adadcba8 type:MM_FILEPAGES val:33 [ 31.142870] BUG: Bad rss-counter state mm:00000000adadcba8 type:MM_ANONPAGES val:22 [ 31.325658] ================================================================== [ 31.326542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.327430] Read of size 8 at addr ffff88800e88c310 by task sshd/219 [ 31.328149] [ 31.328359] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.329367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.330311] Call Trace: [ 31.330614] [ 31.330884] dump_stack_lvl+0x91/0xf0 [ 31.331367] print_report+0xcc/0x620 [ 31.331827] ? __virt_addr_valid+0x102/0x340 [ 31.332348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.333510] kasan_report+0xbe/0xf0 [ 31.333971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334568] vma_interval_tree_remove+0xc75/0xec0 [ 31.335154] vma_prepare+0xc54/0x11a0 [ 31.335630] __split_vma+0x5af/0x950 [ 31.336091] ? __pfx___split_vma+0x10/0x10 [ 31.336616] ? find_held_lock+0x2c/0x110 [ 31.337144] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.337706] ? lock_is_held_type+0x9f/0x120 [ 31.338249] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.338848] ? mtree_range_walk+0x632/0x900 [ 31.339399] ? mas_walk+0x5c7/0x7c0 [ 31.339862] do_vmi_munmap+0x1f1/0x2b0 [ 31.340340] mmap_region+0x1f9/0x2660 [ 31.340809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.341323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.342053] ? __pfx_lock_acquire+0x10/0x10 [ 31.342585] ? __pfx_mmap_region+0x10/0x10 [ 31.343109] ? security_mmap_addr+0x7d/0xa0 [ 31.343633] ? get_unmapped_area+0x1f5/0x3f0 [ 31.344184] do_mmap+0x854/0xf00 [ 31.344625] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.345122] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.345680] ksys_mmap_pgoff+0x3af/0x500 [ 31.346202] do_syscall_64+0x3f/0x90 [ 31.346672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347317] RIP: 0033:0x7f3c837cbd82 [ 31.347776] 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 [ 31.349911] RSP: 002b:00007ffe6e66f978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.350818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c837cbd82 [ 31.351658] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c82c05000 [ 31.352499] RBP: 00007f3c82c05000 R08: 0000000000000009 R09: 0000000000001000 [ 31.353345] R10: 0000000000000812 R11: 0000000000000206 R12: 000056194edbcec0 [ 31.354197] R13: 00007ffe6e66f990 R14: 00007ffe6e66f9c0 R15: 00007ffe6e66fd20 [ 31.355065] [ 31.355353] [ 31.355566] Allocated by task 212: [ 31.355993] kasan_save_stack+0x22/0x50 [ 31.356496] kasan_set_track+0x25/0x30 [ 31.356992] __kasan_slab_alloc+0x59/0x70 [ 31.357509] kmem_cache_alloc+0x16b/0x370 [ 31.358033] vm_area_dup+0x20/0x160 [ 31.358486] __split_vma+0x170/0x950 [ 31.358955] split_vma+0xc6/0x110 [ 31.359395] mprotect_fixup+0x8d2/0xb30 [ 31.359894] do_mprotect_pkey+0x87e/0xd40 [ 31.360415] __x64_sys_mprotect+0x78/0xc0 [ 31.360944] do_syscall_64+0x3f/0x90 [ 31.361416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362079] [ 31.362289] Freed by task 212: [ 31.362670] kasan_save_stack+0x22/0x50 [ 31.363176] kasan_set_track+0x25/0x30 [ 31.363659] kasan_save_free_info+0x2b/0x50 [ 31.364190] __kasan_slab_free+0x10a/0x190 [ 31.364726] kmem_cache_free+0x10d/0x4d0 [ 31.365225] rcu_core+0x8c8/0x2860 [ 31.365666] __do_softirq+0x1b7/0x7d4 [ 31.366144] [ 31.366364] Last potentially related work creation: [ 31.366943] kasan_save_stack+0x22/0x50 [ 31.367440] __kasan_record_aux_stack+0x8e/0xa0 [ 31.368000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.368632] remove_vma+0x139/0x170 [ 31.369084] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.369700] do_vmi_munmap+0x1f1/0x2b0 [ 31.370205] __vm_munmap+0x138/0x3a0 [ 31.370669] __x64_sys_munmap+0x59/0x80 [ 31.371159] do_syscall_64+0x3f/0x90 [ 31.371637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372278] [ 31.372494] The buggy address belongs to the object at ffff88800e88c2b8 [ 31.372494] which belongs to the cache vm_area_struct of size 168 [ 31.373963] The buggy address is located 88 bytes inside of [ 31.373963] freed 168-byte region [ffff88800e88c2b8, ffff88800e88c360) [ 31.375359] [ 31.375572] The buggy address belongs to the physical page: [ 31.376224] page:000000008dff06db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe88c [ 31.377305] memcg:ffff888019d25401 [ 31.377723] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.378369] page_type: 0xffffffff() [ 31.378812] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.379730] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d25401 [ 31.380633] page dumped because: kasan: bad access detected [ 31.381283] [ 31.381502] Memory state around the buggy address: [ 31.382085] ffff88800e88c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.382929] ffff88800e88c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.383785] >ffff88800e88c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.384627] ^ [ 31.385095] ffff88800e88c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.385956] ffff88800e88c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.386794] ================================================================== [ 31.387855] Disabling lock debugging due to kernel taint [ 33.826321] BUG: Bad rss-counter state mm:000000003132b95d type:MM_FILEPAGES val:33 [ 33.827526] BUG: Bad rss-counter state mm:000000003132b95d type:MM_ANONPAGES val:22 [ 34.239498] BUG: Bad rss-counter state mm:0000000039fa17f8 type:MM_FILEPAGES val:33 [ 34.240729] BUG: Bad rss-counter state mm:0000000039fa17f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49759' (ECDSA) to the list of known hosts. 2023/06/21 01:11:48 fuzzer started 2023/06/21 01:11:48 dialing manager at localhost:36067 2023/06/21 01:11:48 checking machine... 2023/06/21 01:11:48 checking revisions... [ 34.986598] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:11:49 testing simple program... [ 35.031472] cgroup: Unknown subsys name 'net' [ 35.087081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:11:48 Registers: info registers vcpu 0 RAX=ffffffff8124d16d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8124d16d RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c7c R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018f9b680 R15=ffff88800964f2e0 RIP=ffffffff813ad474 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 00007fac7234e700 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=00007f4b02d25618 CR3=000000000f30e000 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=31313a3130203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81809a91 RCX=0000000000000001 RDX=1ffff110011c6f35 RSI=ffff888008e37ce0 RDI=ffffffff81809a91 RBP=ffffffff81809a91 RSP=ffff888008e378f8 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=000000000000fc0c R12=ffff888008e37a18 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800c614b80 RIP=ffffffff811fc6f7 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=00007f32d2105540 CR3=0000000013a06000 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=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