syzkaller login: [ 31.673550] BUG: Bad rss-counter state mm:000000000ddf8320 type:MM_FILEPAGES val:33 [ 31.674753] BUG: Bad rss-counter state mm:000000000ddf8320 type:MM_ANONPAGES val:22 [ 31.836316] ================================================================== [ 31.837256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.838190] Read of size 8 at addr ffff88800c5add08 by task sshd/219 [ 31.839093] [ 31.839312] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.840186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.841196] Call Trace: [ 31.841519] [ 31.841805] dump_stack_lvl+0x91/0xf0 [ 31.842294] print_report+0xcc/0x620 [ 31.842786] ? __virt_addr_valid+0x102/0x340 [ 31.843339] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.843961] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.844595] kasan_report+0xbe/0xf0 [ 31.845072] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.845703] vma_interval_tree_remove+0xc75/0xec0 [ 31.846337] vma_prepare+0xc54/0x11a0 [ 31.846844] __split_vma+0x5af/0x950 [ 31.847349] ? __pfx___split_vma+0x10/0x10 [ 31.847901] ? find_held_lock+0x2c/0x110 [ 31.848468] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.849067] ? lock_is_held_type+0x9f/0x120 [ 31.849636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.850279] ? mtree_range_walk+0x632/0x900 [ 31.850860] ? mas_walk+0x5c7/0x7c0 [ 31.851352] do_vmi_munmap+0x1f1/0x2b0 [ 31.851909] mmap_region+0x1f9/0x2660 [ 31.852428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.853032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.853788] ? __pfx_lock_acquire+0x10/0x10 [ 31.854354] ? __pfx_mmap_region+0x10/0x10 [ 31.854922] ? security_mmap_addr+0x7d/0xa0 [ 31.855483] ? get_unmapped_area+0x1f5/0x3f0 [ 31.856061] do_mmap+0x854/0xf00 [ 31.856545] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.857065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.857651] ksys_mmap_pgoff+0x3af/0x500 [ 31.858184] do_syscall_64+0x3f/0x90 [ 31.858688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859370] RIP: 0033:0x7fc51386bd82 [ 31.859856] 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 [ 31.862155] RSP: 002b:00007ffd7a508668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.863107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc51386bd82 [ 31.864024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc512ca5000 [ 31.864952] RBP: 00007fc512ca5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.865855] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb6314cec0 [ 31.866765] R13: 00007ffd7a508680 R14: 00007ffd7a5086b0 R15: 00007ffd7a508a10 [ 31.867678] [ 31.867988] [ 31.868218] Allocated by task 212: [ 31.868677] kasan_save_stack+0x22/0x50 [ 31.869212] kasan_set_track+0x25/0x30 [ 31.869756] __kasan_slab_alloc+0x59/0x70 [ 31.870329] kmem_cache_alloc+0x16b/0x370 [ 31.870868] vm_area_dup+0x20/0x160 [ 31.871356] __split_vma+0x170/0x950 [ 31.871859] split_vma+0xc6/0x110 [ 31.872342] mprotect_fixup+0x8d2/0xb30 [ 31.872870] do_mprotect_pkey+0x87e/0xd40 [ 31.873417] __x64_sys_mprotect+0x78/0xc0 [ 31.873966] do_syscall_64+0x3f/0x90 [ 31.874465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.875142] [ 31.875368] Freed by task 19: [ 31.875773] kasan_save_stack+0x22/0x50 [ 31.876305] kasan_set_track+0x25/0x30 [ 31.876822] kasan_save_free_info+0x2b/0x50 [ 31.877384] __kasan_slab_free+0x10a/0x190 [ 31.877954] kmem_cache_free+0x10d/0x4d0 [ 31.878482] rcu_core+0x8c8/0x2860 [ 31.878951] __do_softirq+0x1b7/0x7d4 [ 31.879457] [ 31.879681] Last potentially related work creation: [ 31.880369] kasan_save_stack+0x22/0x50 [ 31.880903] __kasan_record_aux_stack+0x8e/0xa0 [ 31.881504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.882190] remove_vma+0x139/0x170 [ 31.882680] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.883262] do_vmi_munmap+0x1f1/0x2b0 [ 31.883746] __vm_munmap+0x138/0x3a0 [ 31.884218] __x64_sys_munmap+0x59/0x80 [ 31.884722] do_syscall_64+0x3f/0x90 [ 31.885197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885838] [ 31.886050] The buggy address belongs to the object at ffff88800c5adcb0 [ 31.886050] which belongs to the cache vm_area_struct of size 168 [ 31.887523] The buggy address is located 88 bytes inside of [ 31.887523] freed 168-byte region [ffff88800c5adcb0, ffff88800c5add58) [ 31.888933] [ 31.889145] The buggy address belongs to the physical page: [ 31.889804] page:0000000011eec31e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ad [ 31.890882] memcg:ffff8880169c4c01 [ 31.891307] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.891951] page_type: 0xffffffff() [ 31.892414] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.893379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169c4c01 [ 31.894302] page dumped because: kasan: bad access detected [ 31.894976] [ 31.895205] Memory state around the buggy address: [ 31.895788] ffff88800c5adc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.896661] ffff88800c5adc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.897529] >ffff88800c5add00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.898394] ^ [ 31.898838] ffff88800c5add80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.899719] ffff88800c5ade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.900600] ================================================================== [ 31.901534] Disabling lock debugging due to kernel taint [ 34.001039] BUG: Bad rss-counter state mm:0000000044bc1758 type:MM_FILEPAGES val:33 [ 34.002197] BUG: Bad rss-counter state mm:0000000044bc1758 type:MM_ANONPAGES val:22 [ 34.360709] BUG: Bad rss-counter state mm:00000000bf86497f type:MM_FILEPAGES val:33 [ 34.361856] BUG: Bad rss-counter state mm:00000000bf86497f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44479' (ECDSA) to the list of known hosts. 2023/06/21 01:00:09 fuzzer started 2023/06/21 01:00:10 dialing manager at localhost:36067 2023/06/21 01:00:10 checking machine... 2023/06/21 01:00:10 checking revisions... [ 35.163586] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:00:10 testing simple program... [ 35.215451] cgroup: Unknown subsys name 'net' [ 35.279591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:00:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100191f75c RSI=ffffffff848ff1e0 RDI=ffff88800c8fbae0 RBP=ffff88800c8fbac8 RSP=ffff88801470fbf8 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88800c8fbab0 RIP=ffffffff812db3f8 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 00007f8d779a2900 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=00007f8d77f5a0b0 CR3=000000000cb70000 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=2039303a30303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30303a3130203132 XMM08=69767265733d7373616c63742030733a 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=00007f8940da7850 CR3=000000000d642000 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=4e8932f6f35c50ab5c4256dfee390fef XMM02=ec2efd57dc4c00df000000000011a570 XMM03=d8a028bb7be0c6b4000000000011a640 XMM04=3f795ffd6a0867c000000000000ae988 XMM05=dfcdbad4f1609c370000000000131db8 XMM06=69989d7d48bd316b0000000000130c20 XMM07=e042d86d42eb936e00000000001221e0 XMM08=d8a028bb7be0c6b4000000000011a640 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000