syzkaller login: [ 32.132711] BUG: Bad rss-counter state mm:00000000cac7270c type:MM_FILEPAGES val:33 [ 32.134701] BUG: Bad rss-counter state mm:00000000cac7270c type:MM_ANONPAGES val:22 [ 32.300542] ================================================================== [ 32.301473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.302412] Read of size 8 at addr ffff888017562140 by task sshd/221 [ 32.303182] [ 32.303404] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.304375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.305359] Call Trace: [ 32.305690] [ 32.305988] dump_stack_lvl+0x91/0xf0 [ 32.306484] print_report+0xcc/0x620 [ 32.306980] ? __virt_addr_valid+0x102/0x340 [ 32.307541] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.308164] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.308779] kasan_report+0xbe/0xf0 [ 32.309257] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.309891] vma_interval_tree_remove+0xc75/0xec0 [ 32.310495] vma_prepare+0xc54/0x11a0 [ 32.310982] __split_vma+0x5af/0x950 [ 32.311463] ? __pfx___split_vma+0x10/0x10 [ 32.312001] ? find_held_lock+0x2c/0x110 [ 32.312520] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.313084] ? lock_is_held_type+0x9f/0x120 [ 32.313646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.314255] ? mtree_range_walk+0x632/0x900 [ 32.314804] ? mas_walk+0x5c7/0x7c0 [ 32.315282] do_vmi_munmap+0x1f1/0x2b0 [ 32.315782] mmap_region+0x1f9/0x2660 [ 32.316273] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.316789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.317523] ? __pfx_lock_acquire+0x10/0x10 [ 32.318056] ? __pfx_mmap_region+0x10/0x10 [ 32.318587] ? security_mmap_addr+0x7d/0xa0 [ 32.319116] ? get_unmapped_area+0x1f5/0x3f0 [ 32.319678] do_mmap+0x854/0xf00 [ 32.320121] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.320630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.321189] ksys_mmap_pgoff+0x3af/0x500 [ 32.321717] do_syscall_64+0x3f/0x90 [ 32.322198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.322849] RIP: 0033:0x7f0790c52d82 [ 32.323299] 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 [ 32.325424] RSP: 002b:00007ffcf3b56088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.326358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0790c52d82 [ 32.327210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f079008c000 [ 32.328074] RBP: 00007f079008c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.328919] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a9aa9bec0 [ 32.329781] R13: 00007ffcf3b560a0 R14: 00007ffcf3b560d0 R15: 00007ffcf3b56430 [ 32.330639] [ 32.330931] [ 32.331144] Allocated by task 214: [ 32.331571] kasan_save_stack+0x22/0x50 [ 32.332074] kasan_set_track+0x25/0x30 [ 32.332565] __kasan_slab_alloc+0x59/0x70 [ 32.333095] kmem_cache_alloc+0x16b/0x370 [ 32.333622] vm_area_dup+0x20/0x160 [ 32.334075] __split_vma+0x170/0x950 [ 32.334542] split_vma+0xc6/0x110 [ 32.334986] mprotect_fixup+0x8d2/0xb30 [ 32.335493] do_mprotect_pkey+0x87e/0xd40 [ 32.336021] __x64_sys_mprotect+0x78/0xc0 [ 32.336539] do_syscall_64+0x3f/0x90 [ 32.337025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.337687] [ 32.337902] Freed by task 214: [ 32.338291] kasan_save_stack+0x22/0x50 [ 32.338794] kasan_set_track+0x25/0x30 [ 32.339298] kasan_save_free_info+0x2b/0x50 [ 32.339834] __kasan_slab_free+0x10a/0x190 [ 32.340369] kmem_cache_free+0x10d/0x4d0 [ 32.340875] rcu_core+0x8c8/0x2860 [ 32.341326] __do_softirq+0x1b7/0x7d4 [ 32.341814] [ 32.342030] Last potentially related work creation: [ 32.342611] kasan_save_stack+0x22/0x50 [ 32.343116] __kasan_record_aux_stack+0x8e/0xa0 [ 32.343691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.344334] remove_vma+0x139/0x170 [ 32.344786] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.345348] do_vmi_munmap+0x1f1/0x2b0 [ 32.345855] __vm_munmap+0x138/0x3a0 [ 32.346321] __x64_sys_munmap+0x59/0x80 [ 32.346814] do_syscall_64+0x3f/0x90 [ 32.347286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.347931] [ 32.348150] The buggy address belongs to the object at ffff8880175620e8 [ 32.348150] which belongs to the cache vm_area_struct of size 168 [ 32.349622] The buggy address is located 88 bytes inside of [ 32.349622] freed 168-byte region [ffff8880175620e8, ffff888017562190) [ 32.351019] [ 32.351234] The buggy address belongs to the physical page: [ 32.351894] page:000000002d0479c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17562 [ 32.352990] memcg:ffff888019a10501 [ 32.353411] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.354143] page_type: 0xffffffff() [ 32.354601] raw: 0100000000000200 ffff88800879fc80 ffffea000037af40 dead000000000005 [ 32.355524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a10501 [ 32.356431] page dumped because: kasan: bad access detected [ 32.357099] [ 32.357316] Memory state around the buggy address: [ 32.357914] ffff888017562000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.358776] ffff888017562080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.359631] >ffff888017562100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.360493] ^ [ 32.361141] ffff888017562180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.362010] ffff888017562200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.362868] ================================================================== [ 32.364009] Disabling lock debugging due to kernel taint [ 34.380716] BUG: Bad rss-counter state mm:00000000be3f1d0a type:MM_FILEPAGES val:33 [ 34.381891] BUG: Bad rss-counter state mm:00000000be3f1d0a type:MM_ANONPAGES val:22 [ 34.873342] BUG: Bad rss-counter state mm:000000000f75fb33 type:MM_FILEPAGES val:33 [ 34.874514] BUG: Bad rss-counter state mm:000000000f75fb33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15927' (ECDSA) to the list of known hosts. 2023/06/20 05:58:23 fuzzer started 2023/06/20 05:58:23 dialing manager at localhost:44161 2023/06/20 05:58:23 checking machine... 2023/06/20 05:58:23 checking revisions... [ 35.504102] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:58:24 testing simple program... [ 35.555362] cgroup: Unknown subsys name 'net' [ 35.595720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:58:22 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888015a07390 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=1ffff11002b40f1d RIP=ffffffff8180ef28 RFL=00000283 [--S---C] 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 00007ff855f9d700 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=00007f329f807670 CR3=000000000e844000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383034 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=0000000080000000 RBX=000000000000000a RCX=ffffffff837264db RDX=ffff888015990000 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000000b RSP=ffff88800cf2f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=00000000000000e8 R11=0000099a0000099a R12=0000000000000002 R13=ffffffff87f96b30 R14=00000000000000e8 R15=0000000000000006 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f48572be900 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=00007ffe1cca0000 CR3=000000000fc42000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000