syzkaller login: [ 30.819301] BUG: Bad rss-counter state mm:000000005bd87d71 type:MM_FILEPAGES val:33 [ 30.820521] BUG: Bad rss-counter state mm:000000005bd87d71 type:MM_ANONPAGES val:22 [ 30.858888] ================================================================== [ 30.859923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.860802] Read of size 8 at addr ffff88800fe20df0 by task sshd/221 [ 30.861593] [ 30.861834] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.862655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.863568] Call Trace: [ 30.863892] [ 30.864170] dump_stack_lvl+0x91/0xf0 [ 30.864635] print_report+0xcc/0x620 [ 30.865102] ? __virt_addr_valid+0x102/0x340 [ 30.865624] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866799] kasan_report+0xbe/0xf0 [ 30.867250] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867845] vma_interval_tree_remove+0xc75/0xec0 [ 30.868412] vma_prepare+0xc54/0x11a0 [ 30.868866] __split_vma+0x5af/0x950 [ 30.869335] ? __pfx___split_vma+0x10/0x10 [ 30.869857] ? find_held_lock+0x2c/0x110 [ 30.870401] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.870972] ? lock_is_held_type+0x9f/0x120 [ 30.871511] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872121] ? mtree_range_walk+0x632/0x900 [ 30.872666] ? mas_walk+0x5c7/0x7c0 [ 30.873145] do_vmi_munmap+0x1f1/0x2b0 [ 30.873639] mmap_region+0x1f9/0x2660 [ 30.874133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.875367] ? __pfx_lock_acquire+0x10/0x10 [ 30.875898] ? __pfx_mmap_region+0x10/0x10 [ 30.876422] ? security_mmap_addr+0x7d/0xa0 [ 30.876946] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877494] do_mmap+0x854/0xf00 [ 30.877942] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.878437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.878996] ksys_mmap_pgoff+0x3af/0x500 [ 30.879500] do_syscall_64+0x3f/0x90 [ 30.879976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880621] RIP: 0033:0x7f75af653d82 [ 30.881073] 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 [ 30.883211] RSP: 002b:00007ffc1b54f2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.884126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75af653d82 [ 30.884968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75aea8d000 [ 30.885819] RBP: 00007f75aea8d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.886691] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fd6f5dec0 [ 30.887547] R13: 00007ffc1b54f300 R14: 00007ffc1b54f330 R15: 00007ffc1b54f690 [ 30.888404] [ 30.888696] [ 30.888913] Allocated by task 214: [ 30.889351] kasan_save_stack+0x22/0x50 [ 30.889844] kasan_set_track+0x25/0x30 [ 30.890360] __kasan_slab_alloc+0x59/0x70 [ 30.890896] kmem_cache_alloc+0x16b/0x370 [ 30.891422] vm_area_dup+0x20/0x160 [ 30.891875] __split_vma+0x170/0x950 [ 30.892337] split_vma+0xc6/0x110 [ 30.892777] mprotect_fixup+0x8d2/0xb30 [ 30.893277] do_mprotect_pkey+0x87e/0xd40 [ 30.893799] __x64_sys_mprotect+0x78/0xc0 [ 30.894325] do_syscall_64+0x3f/0x90 [ 30.894809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895447] [ 30.895663] Freed by task 214: [ 30.896062] kasan_save_stack+0x22/0x50 [ 30.896565] kasan_set_track+0x25/0x30 [ 30.897054] kasan_save_free_info+0x2b/0x50 [ 30.897586] __kasan_slab_free+0x10a/0x190 [ 30.898145] kmem_cache_free+0x10d/0x4d0 [ 30.898662] rcu_core+0x8c8/0x2860 [ 30.899106] __do_softirq+0x1b7/0x7d4 [ 30.899590] [ 30.899811] Last potentially related work creation: [ 30.900398] kasan_save_stack+0x22/0x50 [ 30.900907] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.902133] remove_vma+0x139/0x170 [ 30.902590] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.903154] do_vmi_munmap+0x1f1/0x2b0 [ 30.903635] __vm_munmap+0x138/0x3a0 [ 30.904098] __x64_sys_munmap+0x59/0x80 [ 30.904590] do_syscall_64+0x3f/0x90 [ 30.905067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905704] [ 30.905924] The buggy address belongs to the object at ffff88800fe20d98 [ 30.905924] which belongs to the cache vm_area_struct of size 168 [ 30.907391] The buggy address is located 88 bytes inside of [ 30.907391] freed 168-byte region [ffff88800fe20d98, ffff88800fe20e40) [ 30.908807] [ 30.909023] The buggy address belongs to the physical page: [ 30.909684] page:000000002a70d76a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe20 [ 30.910780] memcg:ffff888016a4a601 [ 30.911212] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911860] page_type: 0xffffffff() [ 30.912306] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.913222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a4a601 [ 30.914163] page dumped because: kasan: bad access detected [ 30.914818] [ 30.915034] Memory state around the buggy address: [ 30.915623] ffff88800fe20c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.916473] ffff88800fe20d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.917328] >ffff88800fe20d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918196] ^ [ 30.919010] ffff88800fe20e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.919870] ffff88800fe20e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.920713] ================================================================== [ 30.921854] Disabling lock debugging due to kernel taint [ 33.383438] BUG: Bad rss-counter state mm:000000004945abc4 type:MM_FILEPAGES val:33 [ 33.384801] BUG: Bad rss-counter state mm:000000004945abc4 type:MM_ANONPAGES val:22 [ 33.790706] BUG: Bad rss-counter state mm:00000000ea3a1461 type:MM_FILEPAGES val:33 [ 33.791723] BUG: Bad rss-counter state mm:00000000ea3a1461 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24969' (ECDSA) to the list of known hosts. 2023/06/21 05:58:50 fuzzer started 2023/06/21 05:58:50 dialing manager at localhost:36067 2023/06/21 05:58:50 checking machine... 2023/06/21 05:58:50 checking revisions... [ 34.559234] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:58:50 testing simple program... [ 34.606225] cgroup: Unknown subsys name 'net' [ 34.667561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:58:50 Registers: info registers vcpu 0 RAX=00007fd660000b90 RBX=0000000000000000 RCX=0000000000001fb0 RDX=00007fd660000080 RSI=000000000000000f RDI=0000000000000209 RBP=0000000000001fb0 RSP=00007fd6651bc620 R8 =0000000000000000 R9 =00007fd660000080 R10=00007fd660002b40 R11=0000000000000000 R12=00007fd660000020 R13=00007fd6600008d0 R14=fffffffffffffee0 R15=00007fd665293840 RIP=00007fd6655d99cc RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd6651c0700 00000000 00000000 GS =0000 0000000000000000 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=00007f36973c0800 CR3=00000000195cc000 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=38353a3530203132206e754a3e35333c XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343535 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=dffffc0000000000 RBX=1ffff1100201afac RCX=ffff8880100d7df0 RDX=00007ff657dd5000 RSI=ffff88800e4d85f0 RDI=ffff8880167ddc80 RBP=ffff88800c782000 RSP=ffff8880100d7d30 R8 =0000000000000007 R9 =0000000000000000 R10=0000000019788007 R11=0000000000000000 R12=ffff88800e4d85f0 R13=ffffffff852c61f8 R14=0000000019788007 R15=000000000e4d8067 RIP=ffffffff8175cef6 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff657281900 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=00007ff657dd5044 CR3=000000000c548000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=7a9af9ce3c208a57bd66c75a353f35b4 XMM04=8d3b28ee42fbb1063123cf549be47e8e XMM05=000000000000000000000000000000ff XMM06=7a3b28ce3c208a063123c754353f358e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000