syzkaller login: [ 32.786015] BUG: Bad rss-counter state mm:00000000d02e4e25 type:MM_FILEPAGES val:33 [ 32.787189] BUG: Bad rss-counter state mm:00000000d02e4e25 type:MM_ANONPAGES val:22 [ 32.826595] ================================================================== [ 32.827663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.828722] Read of size 8 at addr ffff8880165125c8 by task sshd/219 [ 32.829619] [ 32.829838] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.830791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.831901] Call Trace: [ 32.832224] [ 32.832508] dump_stack_lvl+0x91/0xf0 [ 32.833143] print_report+0xcc/0x620 [ 32.833629] ? __virt_addr_valid+0x102/0x340 [ 32.834185] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.834814] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.835431] kasan_report+0xbe/0xf0 [ 32.835914] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.836547] vma_interval_tree_remove+0xc75/0xec0 [ 32.837167] vma_prepare+0xc54/0x11a0 [ 32.837650] __split_vma+0x5af/0x950 [ 32.838130] ? __pfx___split_vma+0x10/0x10 [ 32.838681] ? find_held_lock+0x2c/0x110 [ 32.839217] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.839796] ? lock_is_held_type+0x9f/0x120 [ 32.840343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.840967] ? mtree_range_walk+0x632/0x900 [ 32.841527] ? mas_walk+0x5c7/0x7c0 [ 32.842004] do_vmi_munmap+0x1f1/0x2b0 [ 32.842525] mmap_region+0x1f9/0x2660 [ 32.843013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.843536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.844253] ? __pfx_lock_acquire+0x10/0x10 [ 32.844797] ? __pfx_mmap_region+0x10/0x10 [ 32.845339] ? security_mmap_addr+0x7d/0xa0 [ 32.845875] ? get_unmapped_area+0x1f5/0x3f0 [ 32.846450] do_mmap+0x854/0xf00 [ 32.846900] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.847398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.847961] ksys_mmap_pgoff+0x3af/0x500 [ 32.848476] do_syscall_64+0x3f/0x90 [ 32.848968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.849626] RIP: 0033:0x7fb474baed82 [ 32.850088] 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 [ 32.852300] RSP: 002b:00007fff1a1ba2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.853220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb474baed82 [ 32.854083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb473fe8000 [ 32.854973] RBP: 00007fb473fe8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.855837] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f492a7ec0 [ 32.856706] R13: 00007fff1a1ba2f0 R14: 00007fff1a1ba320 R15: 00007fff1a1ba680 [ 32.857576] [ 32.857867] [ 32.858084] Allocated by task 212: [ 32.858530] kasan_save_stack+0x22/0x50 [ 32.859051] kasan_set_track+0x25/0x30 [ 32.859552] __kasan_slab_alloc+0x59/0x70 [ 32.860086] kmem_cache_alloc+0x16b/0x370 [ 32.860617] vm_area_dup+0x20/0x160 [ 32.861082] __split_vma+0x170/0x950 [ 32.861559] split_vma+0xc6/0x110 [ 32.862018] mprotect_fixup+0x8d2/0xb30 [ 32.862527] do_mprotect_pkey+0x87e/0xd40 [ 32.863056] __x64_sys_mprotect+0x78/0xc0 [ 32.863585] do_syscall_64+0x3f/0x90 [ 32.864070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.864726] [ 32.864944] Freed by task 212: [ 32.865351] kasan_save_stack+0x22/0x50 [ 32.865858] kasan_set_track+0x25/0x30 [ 32.866354] kasan_save_free_info+0x2b/0x50 [ 32.866925] __kasan_slab_free+0x10a/0x190 [ 32.867463] kmem_cache_free+0x10d/0x4d0 [ 32.867972] rcu_core+0x8c8/0x2860 [ 32.868417] __do_softirq+0x1b7/0x7d4 [ 32.868905] [ 32.869127] Last potentially related work creation: [ 32.869711] kasan_save_stack+0x22/0x50 [ 32.870266] __kasan_record_aux_stack+0x8e/0xa0 [ 32.870854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.871510] remove_vma+0x139/0x170 [ 32.871970] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.872527] do_vmi_munmap+0x1f1/0x2b0 [ 32.873016] __vm_munmap+0x138/0x3a0 [ 32.873497] __x64_sys_munmap+0x59/0x80 [ 32.874002] do_syscall_64+0x3f/0x90 [ 32.874486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.875155] [ 32.875373] The buggy address belongs to the object at ffff888016512570 [ 32.875373] which belongs to the cache vm_area_struct of size 168 [ 32.876874] The buggy address is located 88 bytes inside of [ 32.876874] freed 168-byte region [ffff888016512570, ffff888016512618) [ 32.878306] [ 32.878541] The buggy address belongs to the physical page: [ 32.879210] page:00000000079dbd0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16512 [ 32.880331] memcg:ffff88800f5ad001 [ 32.880761] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.881423] page_type: 0xffffffff() [ 32.881877] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.882821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5ad001 [ 32.883746] page dumped because: kasan: bad access detected [ 32.884420] [ 32.884641] Memory state around the buggy address: [ 32.885225] ffff888016512480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.886087] ffff888016512500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.886958] >ffff888016512580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.887822] ^ [ 32.888501] ffff888016512600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.889367] ffff888016512680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.890246] ================================================================== [ 32.891229] Disabling lock debugging due to kernel taint [ 35.297247] BUG: Bad rss-counter state mm:0000000005dcd25e type:MM_FILEPAGES val:33 [ 35.298273] BUG: Bad rss-counter state mm:0000000005dcd25e type:MM_ANONPAGES val:22 [ 35.755364] BUG: Bad rss-counter state mm:000000007f062e31 type:MM_FILEPAGES val:33 [ 35.756407] BUG: Bad rss-counter state mm:000000007f062e31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35273' (ECDSA) to the list of known hosts. 2023/06/19 15:03:07 fuzzer started 2023/06/19 15:03:07 dialing manager at localhost:44161 2023/06/19 15:03:07 checking machine... 2023/06/19 15:03:07 checking revisions... [ 36.475538] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:03:07 testing simple program... [ 36.524983] cgroup: Unknown subsys name 'net' [ 36.560193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:03:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09b30 RDI=ffffffff813ad6d0 RBP=ffffffff813ad6d0 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018db9b40 R15=ffff88800dda5000 RIP=ffffffff811fc6f0 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 00007fb12ddc1900 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=00007fb12e376650 CR3=000000000e9f0000 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=000000000000000000ffff0000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc267d74d8 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=00007f27e4088510000056289b3ef790 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