syzkaller login: [ 31.427337] BUG: Bad rss-counter state mm:000000002ca344b9 type:MM_FILEPAGES val:33 [ 31.428742] BUG: Bad rss-counter state mm:000000002ca344b9 type:MM_ANONPAGES val:22 [ 31.569303] ================================================================== [ 31.570244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.571196] Read of size 8 at addr ffff88801a1afa50 by task sshd/221 [ 31.571965] [ 31.572186] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.573216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.574202] Call Trace: [ 31.574530] [ 31.574822] dump_stack_lvl+0x91/0xf0 [ 31.575327] print_report+0xcc/0x620 [ 31.575817] ? __virt_addr_valid+0x102/0x340 [ 31.576381] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577039] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577669] kasan_report+0xbe/0xf0 [ 31.578152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578782] vma_interval_tree_remove+0xc75/0xec0 [ 31.579395] vma_prepare+0xc54/0x11a0 [ 31.579881] __split_vma+0x5af/0x950 [ 31.580364] ? __pfx___split_vma+0x10/0x10 [ 31.580917] ? find_held_lock+0x2c/0x110 [ 31.581442] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.582017] ? lock_is_held_type+0x9f/0x120 [ 31.582561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.583219] ? mtree_range_walk+0x632/0x900 [ 31.583793] ? mas_walk+0x5c7/0x7c0 [ 31.584270] do_vmi_munmap+0x1f1/0x2b0 [ 31.584776] mmap_region+0x1f9/0x2660 [ 31.585264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.585791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.586512] ? __pfx_lock_acquire+0x10/0x10 [ 31.587053] ? __pfx_mmap_region+0x10/0x10 [ 31.587591] ? security_mmap_addr+0x7d/0xa0 [ 31.588129] ? get_unmapped_area+0x1f5/0x3f0 [ 31.588720] do_mmap+0x854/0xf00 [ 31.589167] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.589665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.590227] ksys_mmap_pgoff+0x3af/0x500 [ 31.590745] do_syscall_64+0x3f/0x90 [ 31.591222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.591877] RIP: 0033:0x7f2bf18fcd82 [ 31.592344] 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 [ 31.594522] RSP: 002b:00007ffeb53d4a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.595426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bf18fcd82 [ 31.596272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bf0d36000 [ 31.597136] RBP: 00007f2bf0d36000 R08: 0000000000000009 R09: 0000000000001000 [ 31.597989] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcc87f7ec0 [ 31.598830] R13: 00007ffeb53d4a60 R14: 00007ffeb53d4a90 R15: 00007ffeb53d4df0 [ 31.599692] [ 31.599981] [ 31.600203] Allocated by task 214: [ 31.600657] kasan_save_stack+0x22/0x50 [ 31.601163] kasan_set_track+0x25/0x30 [ 31.601655] __kasan_slab_alloc+0x59/0x70 [ 31.602178] kmem_cache_alloc+0x16b/0x370 [ 31.602687] vm_area_dup+0x20/0x160 [ 31.603140] __split_vma+0x170/0x950 [ 31.603609] split_vma+0xc6/0x110 [ 31.604047] mprotect_fixup+0x8d2/0xb30 [ 31.604556] do_mprotect_pkey+0x87e/0xd40 [ 31.605079] __x64_sys_mprotect+0x78/0xc0 [ 31.605603] do_syscall_64+0x3f/0x90 [ 31.606080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.606718] [ 31.606931] Freed by task 214: [ 31.607323] kasan_save_stack+0x22/0x50 [ 31.607831] kasan_set_track+0x25/0x30 [ 31.608323] kasan_save_free_info+0x2b/0x50 [ 31.608879] __kasan_slab_free+0x10a/0x190 [ 31.609409] kmem_cache_free+0x10d/0x4d0 [ 31.609920] rcu_core+0x8c8/0x2860 [ 31.610359] __do_softirq+0x1b7/0x7d4 [ 31.610841] [ 31.611061] Last potentially related work creation: [ 31.611642] kasan_save_stack+0x22/0x50 [ 31.612149] __kasan_record_aux_stack+0x8e/0xa0 [ 31.612730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.613369] remove_vma+0x139/0x170 [ 31.613926] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.614510] do_vmi_munmap+0x1f1/0x2b0 [ 31.615005] __vm_munmap+0x138/0x3a0 [ 31.615471] __x64_sys_munmap+0x59/0x80 [ 31.615964] do_syscall_64+0x3f/0x90 [ 31.616459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617103] [ 31.617319] The buggy address belongs to the object at ffff88801a1af9f8 [ 31.617319] which belongs to the cache vm_area_struct of size 168 [ 31.618797] The buggy address is located 88 bytes inside of [ 31.618797] freed 168-byte region [ffff88801a1af9f8, ffff88801a1afaa0) [ 31.620212] [ 31.620438] The buggy address belongs to the physical page: [ 31.621096] page:0000000032166f93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1af [ 31.622201] memcg:ffff88800de5b701 [ 31.622635] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.623285] page_type: 0xffffffff() [ 31.623737] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.624653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5b701 [ 31.625551] page dumped because: kasan: bad access detected [ 31.626208] [ 31.626429] Memory state around the buggy address: [ 31.627001] ffff88801a1af900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.627861] ffff88801a1af980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.628735] >ffff88801a1afa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.629580] ^ [ 31.630275] ffff88801a1afa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.631126] ffff88801a1afb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.631968] ================================================================== [ 31.632885] Disabling lock debugging due to kernel taint [ 33.760916] BUG: Bad rss-counter state mm:0000000018fe543a type:MM_FILEPAGES val:33 [ 33.761948] BUG: Bad rss-counter state mm:0000000018fe543a type:MM_ANONPAGES val:22 [ 34.140352] BUG: Bad rss-counter state mm:000000005ec7b14a type:MM_FILEPAGES val:33 [ 34.141317] BUG: Bad rss-counter state mm:000000005ec7b14a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46433' (ECDSA) to the list of known hosts. 2023/06/21 07:55:59 fuzzer started 2023/06/21 07:55:59 dialing manager at localhost:36067 2023/06/21 07:55:59 checking machine... 2023/06/21 07:55:59 checking revisions... [ 34.892660] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:55:59 testing simple program... [ 34.945934] cgroup: Unknown subsys name 'net' [ 35.002573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:59 Registers: info registers vcpu 0 RAX=ffffffff86139623 RBX=0000000000000001 RCX=ffffffff8613961e RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c272c4 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff86139622 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130aa4 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 00007f422a84b900 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=00007f422ae00650 CR3=000000000f178000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=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=00007fb11ea1fac0 CR3=000000000dbf0000 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=2038353a35353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a35353a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000