syzkaller login: [ 30.564701] BUG: Bad rss-counter state mm:000000009de2c4f0 type:MM_FILEPAGES val:33 [ 30.566361] BUG: Bad rss-counter state mm:000000009de2c4f0 type:MM_ANONPAGES val:22 [ 30.731851] ================================================================== [ 30.732761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.733719] Read of size 8 at addr ffff88801584aed8 by task sshd/220 [ 30.734497] [ 30.734718] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.735764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.736754] Call Trace: [ 30.737081] [ 30.737364] dump_stack_lvl+0x91/0xf0 [ 30.737867] print_report+0xcc/0x620 [ 30.738389] ? __virt_addr_valid+0x102/0x340 [ 30.738942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739565] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740193] kasan_report+0xbe/0xf0 [ 30.740671] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741304] vma_interval_tree_remove+0xc75/0xec0 [ 30.741920] vma_prepare+0xc54/0x11a0 [ 30.742415] __split_vma+0x5af/0x950 [ 30.742892] ? __pfx___split_vma+0x10/0x10 [ 30.743429] ? find_held_lock+0x2c/0x110 [ 30.743945] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.744504] ? lock_is_held_type+0x9f/0x120 [ 30.745040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.745649] ? mtree_range_walk+0x632/0x900 [ 30.746217] ? mas_walk+0x5c7/0x7c0 [ 30.746694] do_vmi_munmap+0x1f1/0x2b0 [ 30.747185] mmap_region+0x1f9/0x2660 [ 30.747665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.748881] ? __pfx_lock_acquire+0x10/0x10 [ 30.749412] ? __pfx_mmap_region+0x10/0x10 [ 30.749942] ? security_mmap_addr+0x7d/0xa0 [ 30.750502] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751054] do_mmap+0x854/0xf00 [ 30.751503] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752573] ksys_mmap_pgoff+0x3af/0x500 [ 30.753088] do_syscall_64+0x3f/0x90 [ 30.753566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754222] RIP: 0033:0x7ff5403f8d82 [ 30.754675] 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 [ 30.756849] RSP: 002b:00007ffcea016348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.757820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5403f8d82 [ 30.758728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff53f832000 [ 30.759582] RBP: 00007ff53f832000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760429] R10: 0000000000000812 R11: 0000000000000206 R12: 000056172c681ec0 [ 30.761280] R13: 00007ffcea016360 R14: 00007ffcea016390 R15: 00007ffcea0166f0 [ 30.762151] [ 30.762444] [ 30.762663] Allocated by task 213: [ 30.763100] kasan_save_stack+0x22/0x50 [ 30.763601] kasan_set_track+0x25/0x30 [ 30.764096] __kasan_slab_alloc+0x59/0x70 [ 30.764616] kmem_cache_alloc+0x16b/0x370 [ 30.765127] vm_area_dup+0x20/0x160 [ 30.765587] __split_vma+0x170/0x950 [ 30.766058] split_vma+0xc6/0x110 [ 30.766495] mprotect_fixup+0x8d2/0xb30 [ 30.766998] do_mprotect_pkey+0x87e/0xd40 [ 30.767516] __x64_sys_mprotect+0x78/0xc0 [ 30.768043] do_syscall_64+0x3f/0x90 [ 30.768521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769158] [ 30.769373] Freed by task 213: [ 30.769769] kasan_save_stack+0x22/0x50 [ 30.770287] kasan_set_track+0x25/0x30 [ 30.770787] kasan_save_free_info+0x2b/0x50 [ 30.771322] __kasan_slab_free+0x10a/0x190 [ 30.771864] kmem_cache_free+0x10d/0x4d0 [ 30.772383] rcu_core+0x8c8/0x2860 [ 30.772828] __do_softirq+0x1b7/0x7d4 [ 30.773304] [ 30.773519] Last potentially related work creation: [ 30.774113] kasan_save_stack+0x22/0x50 [ 30.774623] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.775841] remove_vma+0x139/0x170 [ 30.776351] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.776904] do_vmi_munmap+0x1f1/0x2b0 [ 30.777387] __vm_munmap+0x138/0x3a0 [ 30.777860] __x64_sys_munmap+0x59/0x80 [ 30.778372] do_syscall_64+0x3f/0x90 [ 30.778855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779493] [ 30.779713] The buggy address belongs to the object at ffff88801584ae80 [ 30.779713] which belongs to the cache vm_area_struct of size 168 [ 30.781185] The buggy address is located 88 bytes inside of [ 30.781185] freed 168-byte region [ffff88801584ae80, ffff88801584af28) [ 30.782587] [ 30.782802] The buggy address belongs to the physical page: [ 30.783458] page:0000000044a3efc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1584a [ 30.784568] memcg:ffff88800fc2de01 [ 30.785002] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.785649] page_type: 0xffffffff() [ 30.786110] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.787042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc2de01 [ 30.787955] page dumped because: kasan: bad access detected [ 30.788624] [ 30.788839] Memory state around the buggy address: [ 30.789432] ffff88801584ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.790304] ffff88801584ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.791153] >ffff88801584ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792013] ^ [ 30.792746] ffff88801584af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.793617] ffff88801584af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.794467] ================================================================== [ 30.795378] Disabling lock debugging due to kernel taint [ 33.240255] BUG: Bad rss-counter state mm:000000007bf7f6f6 type:MM_FILEPAGES val:33 [ 33.241907] BUG: Bad rss-counter state mm:000000007bf7f6f6 type:MM_ANONPAGES val:22 [ 33.725685] BUG: Bad rss-counter state mm:000000002218e2c4 type:MM_FILEPAGES val:33 [ 33.726711] BUG: Bad rss-counter state mm:000000002218e2c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32331' (ECDSA) to the list of known hosts. 2023/06/20 20:01:57 fuzzer started 2023/06/20 20:01:57 dialing manager at localhost:36067 2023/06/20 20:01:57 checking machine... 2023/06/20 20:01:57 checking revisions... [ 34.396332] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:01:57 testing simple program... [ 34.441106] cgroup: Unknown subsys name 'net' [ 34.478128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:57 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=ffffffff8113b59b RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880161bff58 RSP=ffff8880161bfed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=0000000000000007 R13=00007fff4cdb7000 R14=00007fff4cdb7000 R15=ffff888008459280 RIP=ffffffff814c040a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f77697cb900 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=00007fff4cdb7000 CR3=0000000019c38000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=0258b4c34f365985993d7d945c7dac2b XMM04=7785db090f7963573b527dd873d56901 XMM05=000000000000000000000000000000ff XMM06=0258b4090f3659573b3d7d945c7d6901 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f1b597baff0 CR3=000000000e2a8000 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=ff5c2f191027f29d384303aa43511cec XMM02=ec2efd57dc4c00df000000000011a210 XMM03=ff63f561fb175338000000000011a2e0 XMM04=634b7eb0f3617e9600000000000ae988 XMM05=19e9129bd510f2350000000000131598 XMM06=e1972d652ed6da710000000000130400 XMM07=e042d86d42eb936e00000000001219a0 XMM08=ff63f561fb175338000000000011a2e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000