syzkaller login: [ 31.177240] BUG: Bad rss-counter state mm:00000000ac4e393d type:MM_FILEPAGES val:33 [ 31.178227] BUG: Bad rss-counter state mm:00000000ac4e393d type:MM_ANONPAGES val:22 [ 31.342811] ================================================================== [ 31.343747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.344725] Read of size 8 at addr ffff88800f5cbd08 by task sshd/220 [ 31.345615] [ 31.345843] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.346732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.347756] Call Trace: [ 31.348081] [ 31.348373] dump_stack_lvl+0x91/0xf0 [ 31.348890] print_report+0xcc/0x620 [ 31.349390] ? __virt_addr_valid+0x102/0x340 [ 31.349955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351217] kasan_report+0xbe/0xf0 [ 31.351701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352345] vma_interval_tree_remove+0xc75/0xec0 [ 31.352987] vma_prepare+0xc54/0x11a0 [ 31.353487] __split_vma+0x5af/0x950 [ 31.353966] ? __pfx___split_vma+0x10/0x10 [ 31.354512] ? find_held_lock+0x2c/0x110 [ 31.355058] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.355644] ? lock_is_held_type+0x9f/0x120 [ 31.356204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.356848] ? mtree_range_walk+0x632/0x900 [ 31.357425] ? mas_walk+0x5c7/0x7c0 [ 31.357919] do_vmi_munmap+0x1f1/0x2b0 [ 31.358429] mmap_region+0x1f9/0x2660 [ 31.358919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.359454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.360194] ? __pfx_lock_acquire+0x10/0x10 [ 31.360753] ? __pfx_mmap_region+0x10/0x10 [ 31.361300] ? security_mmap_addr+0x7d/0xa0 [ 31.361854] ? get_unmapped_area+0x1f5/0x3f0 [ 31.362424] do_mmap+0x854/0xf00 [ 31.362885] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.363390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.363959] ksys_mmap_pgoff+0x3af/0x500 [ 31.364491] do_syscall_64+0x3f/0x90 [ 31.364985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365660] RIP: 0033:0x7f2f885ffd82 [ 31.366141] 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 [ 31.368359] RSP: 002b:00007ffe3169f688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.369318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f885ffd82 [ 31.370219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f87a39000 [ 31.371094] RBP: 00007f2f87a39000 R08: 0000000000000009 R09: 0000000000001000 [ 31.371969] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a04efeec0 [ 31.372849] R13: 00007ffe3169f6a0 R14: 00007ffe3169f6d0 R15: 00007ffe3169fa30 [ 31.373739] [ 31.374029] [ 31.374246] Allocated by task 213: [ 31.374696] kasan_save_stack+0x22/0x50 [ 31.375207] kasan_set_track+0x25/0x30 [ 31.375712] __kasan_slab_alloc+0x59/0x70 [ 31.376257] kmem_cache_alloc+0x16b/0x370 [ 31.376812] vm_area_dup+0x20/0x160 [ 31.377282] __split_vma+0x170/0x950 [ 31.377767] split_vma+0xc6/0x110 [ 31.378226] mprotect_fixup+0x8d2/0xb30 [ 31.378745] do_mprotect_pkey+0x87e/0xd40 [ 31.379281] __x64_sys_mprotect+0x78/0xc0 [ 31.379817] do_syscall_64+0x3f/0x90 [ 31.380300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380975] [ 31.381200] Freed by task 213: [ 31.381602] kasan_save_stack+0x22/0x50 [ 31.382122] kasan_set_track+0x25/0x30 [ 31.382634] kasan_save_free_info+0x2b/0x50 [ 31.383177] __kasan_slab_free+0x10a/0x190 [ 31.383722] kmem_cache_free+0x10d/0x4d0 [ 31.384254] rcu_core+0x8c8/0x2860 [ 31.384724] __do_softirq+0x1b7/0x7d4 [ 31.385213] [ 31.385434] Last potentially related work creation: [ 31.386035] kasan_save_stack+0x22/0x50 [ 31.386548] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.387799] remove_vma+0x139/0x170 [ 31.388266] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.388842] do_vmi_munmap+0x1f1/0x2b0 [ 31.389348] __vm_munmap+0x138/0x3a0 [ 31.389827] __x64_sys_munmap+0x59/0x80 [ 31.390336] do_syscall_64+0x3f/0x90 [ 31.390827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.391493] [ 31.391712] The buggy address belongs to the object at ffff88800f5cbcb0 [ 31.391712] which belongs to the cache vm_area_struct of size 168 [ 31.393235] The buggy address is located 88 bytes inside of [ 31.393235] freed 168-byte region [ffff88800f5cbcb0, ffff88800f5cbd58) [ 31.394678] [ 31.394904] The buggy address belongs to the physical page: [ 31.395578] page:00000000112e16e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5cb [ 31.396713] memcg:ffff88800df2fc01 [ 31.397164] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.397838] page_type: 0xffffffff() [ 31.398297] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.399249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df2fc01 [ 31.400190] page dumped because: kasan: bad access detected [ 31.400879] [ 31.401098] Memory state around the buggy address: [ 31.401705] ffff88800f5cbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.402594] ffff88800f5cbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.403494] >ffff88800f5cbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.404379] ^ [ 31.404854] ffff88800f5cbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.405749] ffff88800f5cbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.406647] ================================================================== [ 31.407675] Disabling lock debugging due to kernel taint [ 33.614565] BUG: Bad rss-counter state mm:000000007af6c422 type:MM_FILEPAGES val:33 [ 33.615752] BUG: Bad rss-counter state mm:000000007af6c422 type:MM_ANONPAGES val:22 [ 34.058002] BUG: Bad rss-counter state mm:00000000ee94e044 type:MM_FILEPAGES val:33 [ 34.059178] BUG: Bad rss-counter state mm:00000000ee94e044 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40637' (ECDSA) to the list of known hosts. 2023/06/21 02:26:57 fuzzer started 2023/06/21 02:26:57 dialing manager at localhost:36067 2023/06/21 02:26:57 checking machine... 2023/06/21 02:26:57 checking revisions... [ 34.709782] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:26:57 testing simple program... [ 34.749257] cgroup: Unknown subsys name 'net' [ 34.802492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:57 Registers: info registers vcpu 0 RAX=1ffffffff0a58c3f RBX=000000000000001e RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8184d22f RDI=0000000000000006 RBP=ffff88801a3b80de RSP=ffff88800c4ef838 R8 =0000000000000006 R9 =ffff88801a3b80c0 R10=ffff88809a3b80c0 R11=0030733a745f6c65 R12=ffff88801a3b80c0 R13=0000000000000001 R14=ffff88809a3b80c0 R15=0000000000000000 RIP=ffffffff8184d248 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 00007ff040dfa700 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=00007fc8008e6ac0 CR3=000000000fa94000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036353a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363931 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=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=00007fff06ea5a08 CR3=0000000005482000 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=00007fb5ae4e2510000055e0dc35d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000