syzkaller login: [ 30.650675] BUG: Bad rss-counter state mm:000000003b644861 type:MM_FILEPAGES val:33 [ 30.651665] BUG: Bad rss-counter state mm:000000003b644861 type:MM_ANONPAGES val:22 [ 30.824790] ================================================================== [ 30.825815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.826841] Read of size 8 at addr ffff88800e82c058 by task sshd/221 [ 30.827743] [ 30.828108] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.829058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.830169] Call Trace: [ 30.830521] [ 30.830837] dump_stack_lvl+0x91/0xf0 [ 30.831375] print_report+0xcc/0x620 [ 30.831915] ? __virt_addr_valid+0x102/0x340 [ 30.832527] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833211] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833898] kasan_report+0xbe/0xf0 [ 30.834428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835115] vma_interval_tree_remove+0xc75/0xec0 [ 30.835777] vma_prepare+0xc54/0x11a0 [ 30.836306] __split_vma+0x5af/0x950 [ 30.836826] ? __pfx___split_vma+0x10/0x10 [ 30.837412] ? find_held_lock+0x2c/0x110 [ 30.838006] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.838624] ? lock_is_held_type+0x9f/0x120 [ 30.839231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.839902] ? mtree_range_walk+0x632/0x900 [ 30.840516] ? mas_walk+0x5c7/0x7c0 [ 30.841041] do_vmi_munmap+0x1f1/0x2b0 [ 30.841605] mmap_region+0x1f9/0x2660 [ 30.842139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.842704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843485] ? __pfx_lock_acquire+0x10/0x10 [ 30.844072] ? __pfx_mmap_region+0x10/0x10 [ 30.844668] ? security_mmap_addr+0x7d/0xa0 [ 30.845253] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845879] do_mmap+0x854/0xf00 [ 30.846374] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847541] ksys_mmap_pgoff+0x3af/0x500 [ 30.848096] do_syscall_64+0x3f/0x90 [ 30.848628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849343] RIP: 0033:0x7faad63bfd82 [ 30.849861] 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 [ 30.852238] RSP: 002b:00007ffe242e7e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.853249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faad63bfd82 [ 30.854208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faad57f9000 [ 30.855146] RBP: 00007faad57f9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.856078] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c2e3e4d90 [ 30.857008] R13: 00007ffe242e7e40 R14: 00007ffe242e7e70 R15: 00007ffe242e81d0 [ 30.857972] [ 30.858297] [ 30.858534] Allocated by task 214: [ 30.859006] kasan_save_stack+0x22/0x50 [ 30.859562] kasan_set_track+0x25/0x30 [ 30.860105] __kasan_slab_alloc+0x59/0x70 [ 30.860686] kmem_cache_alloc+0x16b/0x370 [ 30.861270] vm_area_dup+0x20/0x160 [ 30.861782] __split_vma+0x170/0x950 [ 30.862303] split_vma+0xc6/0x110 [ 30.862784] mprotect_fixup+0x8d2/0xb30 [ 30.863342] do_mprotect_pkey+0x87e/0xd40 [ 30.863930] __x64_sys_mprotect+0x78/0xc0 [ 30.864503] do_syscall_64+0x3f/0x90 [ 30.865036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865772] [ 30.866012] Freed by task 204: [ 30.866449] kasan_save_stack+0x22/0x50 [ 30.866994] kasan_set_track+0x25/0x30 [ 30.867497] kasan_save_free_info+0x2b/0x50 [ 30.868032] __kasan_slab_free+0x10a/0x190 [ 30.868569] kmem_cache_free+0x10d/0x4d0 [ 30.869079] rcu_core+0x8c8/0x2860 [ 30.869637] __do_softirq+0x1b7/0x7d4 [ 30.870120] [ 30.870340] Last potentially related work creation: [ 30.870925] kasan_save_stack+0x22/0x50 [ 30.871433] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.872674] remove_vma+0x139/0x170 [ 30.873136] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.873717] do_vmi_munmap+0x1f1/0x2b0 [ 30.874206] __vm_munmap+0x138/0x3a0 [ 30.874684] __x64_sys_munmap+0x59/0x80 [ 30.875186] do_syscall_64+0x3f/0x90 [ 30.875714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876422] [ 30.876662] The buggy address belongs to the object at ffff88800e82c000 [ 30.876662] which belongs to the cache vm_area_struct of size 168 [ 30.878276] The buggy address is located 88 bytes inside of [ 30.878276] freed 168-byte region [ffff88800e82c000, ffff88800e82c0a8) [ 30.879808] [ 30.880044] The buggy address belongs to the physical page: [ 30.880754] page:000000007500df6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe82c [ 30.881933] memcg:ffff888009804a01 [ 30.882398] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.883096] page_type: 0xffffffff() [ 30.883584] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.884581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009804a01 [ 30.885579] page dumped because: kasan: bad access detected [ 30.886318] [ 30.886553] Memory state around the buggy address: [ 30.887204] ffff88800e82bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.888129] ffff88800e82bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.889070] >ffff88800e82c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.890004] ^ [ 30.890807] ffff88800e82c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.891740] ffff88800e82c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892687] ================================================================== [ 30.893778] Disabling lock debugging due to kernel taint [ 33.152982] BUG: Bad rss-counter state mm:00000000dab56252 type:MM_FILEPAGES val:33 [ 33.153973] BUG: Bad rss-counter state mm:00000000dab56252 type:MM_ANONPAGES val:22 [ 33.612192] BUG: Bad rss-counter state mm:000000006cd8922d type:MM_FILEPAGES val:33 [ 33.613160] BUG: Bad rss-counter state mm:000000006cd8922d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26687' (ECDSA) to the list of known hosts. 2023/06/20 19:58:08 fuzzer started 2023/06/20 19:58:09 dialing manager at localhost:36067 2023/06/20 19:58:09 checking machine... 2023/06/20 19:58:09 checking revisions... [ 34.343619] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:58:09 testing simple program... [ 34.390269] cgroup: Unknown subsys name 'net' [ 34.426479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:08 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86621100 RCX=0000000080000101 RDX=ffffffff8542a6c0 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a9288d0 RIP=ffffffff814c0871 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 0000000000000000 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=00007f3bbbb78950 CR3=000000000eb22000 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=2038303a38353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38353a3931203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fe4a600 RCX=ffffffff81846775 RDX=1ffff11002d518ec RSI=ffffffff81845e00 RDI=ffff888016a8c7a0 RBP=ffff88800948faa0 RSP=ffff88800948fa38 R8 =0000000000000001 R9 =ffffed1002d518f6 R10=ffff888016a8c7b3 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea00003f9280 R14=ffffffff844ae5be R15=0000000000000001 RIP=ffffffff81370a2d RFL=00000282 [--S----] 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 00007fd2fc5a1900 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=00007fd2fc56b008 CR3=000000000ec3c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000