syzkaller login: [ 30.817104] BUG: Bad rss-counter state mm:0000000058e768ce type:MM_FILEPAGES val:33 [ 30.818279] BUG: Bad rss-counter state mm:0000000058e768ce type:MM_ANONPAGES val:22 [ 30.855493] ================================================================== [ 30.856394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.857284] Read of size 8 at addr ffff88800ebba058 by task sshd/219 [ 30.858025] [ 30.858234] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.859066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860039] Call Trace: [ 30.860350] [ 30.860632] dump_stack_lvl+0x91/0xf0 [ 30.861101] print_report+0xcc/0x620 [ 30.861567] ? __virt_addr_valid+0x102/0x340 [ 30.862105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862700] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863306] kasan_report+0xbe/0xf0 [ 30.863770] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864373] vma_interval_tree_remove+0xc75/0xec0 [ 30.864956] vma_prepare+0xc54/0x11a0 [ 30.865416] __split_vma+0x5af/0x950 [ 30.865876] ? __pfx___split_vma+0x10/0x10 [ 30.866391] ? find_held_lock+0x2c/0x110 [ 30.866900] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867457] ? lock_is_held_type+0x9f/0x120 [ 30.867982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868563] ? mtree_range_walk+0x632/0x900 [ 30.869105] ? mas_walk+0x5c7/0x7c0 [ 30.869562] do_vmi_munmap+0x1f1/0x2b0 [ 30.870042] mmap_region+0x1f9/0x2660 [ 30.870504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.870994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871686] ? __pfx_lock_acquire+0x10/0x10 [ 30.872226] ? __pfx_mmap_region+0x10/0x10 [ 30.872744] ? security_mmap_addr+0x7d/0xa0 [ 30.873256] ? get_unmapped_area+0x1f5/0x3f0 [ 30.873796] do_mmap+0x854/0xf00 [ 30.874227] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.874717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875269] ksys_mmap_pgoff+0x3af/0x500 [ 30.875759] do_syscall_64+0x3f/0x90 [ 30.876229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876858] RIP: 0033:0x7f93f1d45d82 [ 30.877302] 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 [ 30.879365] RSP: 002b:00007ffd89d8d528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.880247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93f1d45d82 [ 30.881053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93f117f000 [ 30.881874] RBP: 00007f93f117f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.882700] R10: 0000000000000812 R11: 0000000000000206 R12: 000056153db45ec0 [ 30.883612] R13: 00007ffd89d8d540 R14: 00007ffd89d8d570 R15: 00007ffd89d8d8d0 [ 30.884469] [ 30.884750] [ 30.884957] Allocated by task 212: [ 30.885373] kasan_save_stack+0x22/0x50 [ 30.885871] kasan_set_track+0x25/0x30 [ 30.886360] __kasan_slab_alloc+0x59/0x70 [ 30.886875] kmem_cache_alloc+0x16b/0x370 [ 30.887375] vm_area_dup+0x20/0x160 [ 30.887815] __split_vma+0x170/0x950 [ 30.888276] split_vma+0xc6/0x110 [ 30.888709] mprotect_fixup+0x8d2/0xb30 [ 30.889199] do_mprotect_pkey+0x87e/0xd40 [ 30.889704] __x64_sys_mprotect+0x78/0xc0 [ 30.890213] do_syscall_64+0x3f/0x90 [ 30.890680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891306] [ 30.891515] Freed by task 212: [ 30.891896] kasan_save_stack+0x22/0x50 [ 30.892407] kasan_set_track+0x25/0x30 [ 30.892887] kasan_save_free_info+0x2b/0x50 [ 30.893407] __kasan_slab_free+0x10a/0x190 [ 30.893920] kmem_cache_free+0x10d/0x4d0 [ 30.894415] rcu_core+0x8c8/0x2860 [ 30.894847] __do_softirq+0x1b7/0x7d4 [ 30.895312] [ 30.895519] Last potentially related work creation: [ 30.896076] kasan_save_stack+0x22/0x50 [ 30.896566] __kasan_record_aux_stack+0x8e/0xa0 [ 30.897126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.897742] remove_vma+0x139/0x170 [ 30.898178] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.898723] do_vmi_munmap+0x1f1/0x2b0 [ 30.899196] __vm_munmap+0x138/0x3a0 [ 30.899658] __x64_sys_munmap+0x59/0x80 [ 30.900157] do_syscall_64+0x3f/0x90 [ 30.900615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901219] [ 30.901425] The buggy address belongs to the object at ffff88800ebba000 [ 30.901425] which belongs to the cache vm_area_struct of size 168 [ 30.902834] The buggy address is located 88 bytes inside of [ 30.902834] freed 168-byte region [ffff88800ebba000, ffff88800ebba0a8) [ 30.904179] [ 30.904383] The buggy address belongs to the physical page: [ 30.905017] page:00000000b38031a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebba [ 30.906057] memcg:ffff8880097b8101 [ 30.906469] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.907154] page_type: 0xffffffff() [ 30.907591] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.908474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097b8101 [ 30.909331] page dumped because: kasan: bad access detected [ 30.909960] [ 30.910163] Memory state around the buggy address: [ 30.910714] ffff88800ebb9f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.911515] ffff88800ebb9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.912332] >ffff88800ebba000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.913129] ^ [ 30.913816] ffff88800ebba080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.914662] ffff88800ebba100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.915507] ================================================================== [ 30.916999] Disabling lock debugging due to kernel taint [ 32.983754] BUG: Bad rss-counter state mm:0000000013a9bf0c type:MM_FILEPAGES val:33 [ 32.985237] BUG: Bad rss-counter state mm:0000000013a9bf0c type:MM_ANONPAGES val:22 [ 33.439744] BUG: Bad rss-counter state mm:0000000075aa4c77 type:MM_FILEPAGES val:33 [ 33.440675] BUG: Bad rss-counter state mm:0000000075aa4c77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44093' (ECDSA) to the list of known hosts. 2023/06/20 12:36:05 fuzzer started 2023/06/20 12:36:05 dialing manager at localhost:36067 2023/06/20 12:36:05 checking machine... 2023/06/20 12:36:05 checking revisions... [ 34.195522] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:36:05 testing simple program... [ 34.243175] cgroup: Unknown subsys name 'net' [ 34.288259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:36:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016bf0ec8 RCX=0000000000000000 RDX=ffff888015be1b40 RSI=ffffffff8162a068 RDI=ffff888015be1f34 RBP=0000000000000000 RSP=ffff888013ff78f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888013ff7dc8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c089b 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 00007f721c231900 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=00007f721c7e90b0 CR3=00000000099f8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880160e5c80 RBX=ffff8880068884b0 RCX=ffffffff8451d253 RDX=1ffff11000d11096 RSI=ffff888008d91b40 RDI=ffff8880160e5c80 RBP=ffff888006887b50 RSP=ffff888006887a18 R8 =0000000000000001 R9 =ffffed1000d1127d R10=ffff8880068893ef R11=0000000000000000 R12=ffff88806cf39500 R13=ffff888006888000 R14=ffff888008d91fe8 R15=ffff888008d91b40 RIP=ffffffff81144dec RFL=00000046 [---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 00007f3dfbb58900 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=00007f3dfafbd4a0 CR3=000000000c9fc000 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=0e6d4b792ee77697094d4d7244c7acec XMM02=ec2efd57dc4c00df000000000011b8b0 XMM03=9f0b5e99861c4931000000000011b980 XMM04=d1cb38b0ebebbd4d00000000000ae988 XMM05=19e9129bd510f2350000000000132878 XMM06=794308e947c0adbd00000000001316e0 XMM07=e042d86d42eb936e00000000001229a8 XMM08=9f0b5e99861c4931000000000011b980 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000