syzkaller login: [ 38.703644] BUG: Bad rss-counter state mm:0000000073fc6e78 type:MM_FILEPAGES val:33 [ 38.704652] BUG: Bad rss-counter state mm:0000000073fc6e78 type:MM_ANONPAGES val:22 [ 38.867388] ================================================================== [ 38.868247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.869134] Read of size 8 at addr ffff88801b86a310 by task sshd/219 [ 38.869870] [ 38.870227] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.871054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.871969] Call Trace: [ 38.872273] [ 38.872560] dump_stack_lvl+0x91/0xf0 [ 38.873027] print_report+0xcc/0x620 [ 38.873485] ? __virt_addr_valid+0x102/0x340 [ 38.874034] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874615] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875199] kasan_report+0xbe/0xf0 [ 38.875649] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876236] vma_interval_tree_remove+0xc75/0xec0 [ 38.876805] vma_prepare+0xc54/0x11a0 [ 38.877258] __split_vma+0x5af/0x950 [ 38.877710] ? __pfx___split_vma+0x10/0x10 [ 38.878214] ? find_held_lock+0x2c/0x110 [ 38.878711] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.879251] ? lock_is_held_type+0x9f/0x120 [ 38.879760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.880328] ? mtree_range_walk+0x632/0x900 [ 38.880851] ? mas_walk+0x5c7/0x7c0 [ 38.881303] do_vmi_munmap+0x1f1/0x2b0 [ 38.881773] mmap_region+0x1f9/0x2660 [ 38.882231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.882714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.883392] ? __pfx_lock_acquire+0x10/0x10 [ 38.883891] ? __pfx_mmap_region+0x10/0x10 [ 38.884388] ? security_mmap_addr+0x7d/0xa0 [ 38.884888] ? get_unmapped_area+0x1f5/0x3f0 [ 38.885411] do_mmap+0x854/0xf00 [ 38.885845] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.886316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.886850] ksys_mmap_pgoff+0x3af/0x500 [ 38.887328] do_syscall_64+0x3f/0x90 [ 38.887781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888395] RIP: 0033:0x7fb7f7f03d82 [ 38.888827] 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 [ 38.890812] RSP: 002b:00007ffe4d318188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.891667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7f7f03d82 [ 38.892466] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7f733d000 [ 38.893261] RBP: 00007fb7f733d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894072] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616210e8ec0 [ 38.894862] R13: 00007ffe4d3181a0 R14: 00007ffe4d3181d0 R15: 00007ffe4d318530 [ 38.895665] [ 38.895943] [ 38.896151] Allocated by task 212: [ 38.896556] kasan_save_stack+0x22/0x50 [ 38.897033] kasan_set_track+0x25/0x30 [ 38.897502] __kasan_slab_alloc+0x59/0x70 [ 38.897999] kmem_cache_alloc+0x16b/0x370 [ 38.898494] vm_area_dup+0x20/0x160 [ 38.898919] __split_vma+0x170/0x950 [ 38.899362] split_vma+0xc6/0x110 [ 38.899777] mprotect_fixup+0x8d2/0xb30 [ 38.900252] do_mprotect_pkey+0x87e/0xd40 [ 38.900744] __x64_sys_mprotect+0x78/0xc0 [ 38.901236] do_syscall_64+0x3f/0x90 [ 38.901689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902330] [ 38.902534] Freed by task 212: [ 38.902907] kasan_save_stack+0x22/0x50 [ 38.903384] kasan_set_track+0x25/0x30 [ 38.903851] kasan_save_free_info+0x2b/0x50 [ 38.904357] __kasan_slab_free+0x10a/0x190 [ 38.904858] kmem_cache_free+0x10d/0x4d0 [ 38.905341] rcu_core+0x8c8/0x2860 [ 38.905768] __do_softirq+0x1b7/0x7d4 [ 38.906217] [ 38.906421] Last potentially related work creation: [ 38.906971] kasan_save_stack+0x22/0x50 [ 38.907444] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.908582] remove_vma+0x139/0x170 [ 38.909009] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909538] do_vmi_munmap+0x1f1/0x2b0 [ 38.909999] __vm_munmap+0x138/0x3a0 [ 38.910437] __x64_sys_munmap+0x59/0x80 [ 38.910904] do_syscall_64+0x3f/0x90 [ 38.911354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912027] [ 38.912231] The buggy address belongs to the object at ffff88801b86a2b8 [ 38.912231] which belongs to the cache vm_area_struct of size 168 [ 38.913605] The buggy address is located 88 bytes inside of [ 38.913605] freed 168-byte region [ffff88801b86a2b8, ffff88801b86a360) [ 38.915006] [ 38.915220] The buggy address belongs to the physical page: [ 38.915874] page:000000001f11eb30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b86a [ 38.916939] memcg:ffff88800dbdd901 [ 38.917352] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.917981] page_type: 0xffffffff() [ 38.918418] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.919320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbdd901 [ 38.920192] page dumped because: kasan: bad access detected [ 38.920826] [ 38.921037] Memory state around the buggy address: [ 38.921604] ffff88801b86a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.922459] ffff88801b86a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.923291] >ffff88801b86a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.924139] ^ [ 38.924585] ffff88801b86a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.925410] ffff88801b86a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.926240] ================================================================== [ 38.927339] Disabling lock debugging due to kernel taint [ 40.961320] BUG: Bad rss-counter state mm:00000000ded4d7fd type:MM_FILEPAGES val:33 [ 40.962294] BUG: Bad rss-counter state mm:00000000ded4d7fd type:MM_ANONPAGES val:22 [ 41.431144] BUG: Bad rss-counter state mm:00000000fbc12150 type:MM_FILEPAGES val:33 [ 41.432299] BUG: Bad rss-counter state mm:00000000fbc12150 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44840' (ECDSA) to the list of known hosts. 2023/06/20 11:44:07 fuzzer started 2023/06/20 11:44:07 dialing manager at localhost:36067 2023/06/20 11:44:07 checking machine... 2023/06/20 11:44:07 checking revisions... [ 42.187362] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:44:07 testing simple program... [ 42.243695] cgroup: Unknown subsys name 'net' [ 42.302837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016ab1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801608e8d0 RSP=ffff88800f0d7c58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88801608e960 R13=ffffffff818cf389 R14=0000000000000001 R15=ffff88801668a080 RIP=ffffffff814c0404 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 00007fe836cdf900 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=00007fe837294650 CR3=000000000ee1c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd1210a318 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=00007fc25b5c9510000055ea2d883790 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