syzkaller login: [ 31.188446] BUG: Bad rss-counter state mm:00000000fa96181c type:MM_FILEPAGES val:33 [ 31.189632] BUG: Bad rss-counter state mm:00000000fa96181c type:MM_ANONPAGES val:22 [ 31.226527] ================================================================== [ 31.227367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228145] Read of size 8 at addr ffff88801a44bed8 by task sshd/221 [ 31.228700] [ 31.228886] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.229577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.230451] Call Trace: [ 31.230808] [ 31.231046] dump_stack_lvl+0x91/0xf0 [ 31.231403] print_report+0xcc/0x620 [ 31.231748] ? __virt_addr_valid+0x102/0x340 [ 31.232141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233036] kasan_report+0xbe/0xf0 [ 31.233373] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233816] vma_interval_tree_remove+0xc75/0xec0 [ 31.234249] vma_prepare+0xc54/0x11a0 [ 31.234590] __split_vma+0x5af/0x950 [ 31.234947] ? __pfx___split_vma+0x10/0x10 [ 31.235323] ? find_held_lock+0x2c/0x110 [ 31.235699] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.236103] ? lock_is_held_type+0x9f/0x120 [ 31.236484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236923] ? mtree_range_walk+0x632/0x900 [ 31.237316] ? mas_walk+0x5c7/0x7c0 [ 31.237655] do_vmi_munmap+0x1f1/0x2b0 [ 31.238006] mmap_region+0x1f9/0x2660 [ 31.238350] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.238740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.239253] ? __pfx_lock_acquire+0x10/0x10 [ 31.239635] ? __pfx_mmap_region+0x10/0x10 [ 31.240013] ? security_mmap_addr+0x7d/0xa0 [ 31.240389] ? get_unmapped_area+0x1f5/0x3f0 [ 31.240785] do_mmap+0x854/0xf00 [ 31.241105] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.241473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.241882] ksys_mmap_pgoff+0x3af/0x500 [ 31.242247] do_syscall_64+0x3f/0x90 [ 31.242588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243083] RIP: 0033:0x7f8acadf8d82 [ 31.243409] 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 [ 31.244933] RSP: 002b:00007ffde3af3c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245581] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8acadf8d82 [ 31.246190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8aca232000 [ 31.246819] RBP: 00007f8aca232000 R08: 0000000000000009 R09: 0000000000001000 [ 31.247429] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560053110ec0 [ 31.248042] R13: 00007ffde3af3c50 R14: 00007ffde3af3c80 R15: 00007ffde3af3fe0 [ 31.248658] [ 31.248869] [ 31.249023] Allocated by task 214: [ 31.249327] kasan_save_stack+0x22/0x50 [ 31.249687] kasan_set_track+0x25/0x30 [ 31.250043] __kasan_slab_alloc+0x59/0x70 [ 31.250416] kmem_cache_alloc+0x16b/0x370 [ 31.250807] vm_area_dup+0x20/0x160 [ 31.251134] __split_vma+0x170/0x950 [ 31.251467] split_vma+0xc6/0x110 [ 31.251776] mprotect_fixup+0x8d2/0xb30 [ 31.252135] do_mprotect_pkey+0x87e/0xd40 [ 31.252509] __x64_sys_mprotect+0x78/0xc0 [ 31.252881] do_syscall_64+0x3f/0x90 [ 31.253224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253682] [ 31.253836] Freed by task 214: [ 31.254115] kasan_save_stack+0x22/0x50 [ 31.254477] kasan_set_track+0x25/0x30 [ 31.254854] kasan_save_free_info+0x2b/0x50 [ 31.255234] __kasan_slab_free+0x10a/0x190 [ 31.255615] kmem_cache_free+0x10d/0x4d0 [ 31.255976] rcu_core+0x8c8/0x2860 [ 31.256294] __do_softirq+0x1b7/0x7d4 [ 31.256640] [ 31.256794] Last potentially related work creation: [ 31.257213] kasan_save_stack+0x22/0x50 [ 31.257571] __kasan_record_aux_stack+0x8e/0xa0 [ 31.257977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258437] remove_vma+0x139/0x170 [ 31.258772] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259173] do_vmi_munmap+0x1f1/0x2b0 [ 31.259527] __vm_munmap+0x138/0x3a0 [ 31.259858] __x64_sys_munmap+0x59/0x80 [ 31.260217] do_syscall_64+0x3f/0x90 [ 31.260559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261017] [ 31.261172] The buggy address belongs to the object at ffff88801a44be80 [ 31.261172] which belongs to the cache vm_area_struct of size 168 [ 31.262231] The buggy address is located 88 bytes inside of [ 31.262231] freed 168-byte region [ffff88801a44be80, ffff88801a44bf28) [ 31.263262] [ 31.263414] The buggy address belongs to the physical page: [ 31.263897] page:00000000a8fcac13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a44b [ 31.264679] memcg:ffff88800fc23701 [ 31.264985] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.265444] page_type: 0xffffffff() [ 31.265768] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.266422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc23701 [ 31.267097] page dumped because: kasan: bad access detected [ 31.267576] [ 31.267729] Memory state around the buggy address: [ 31.268145] ffff88801a44bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.268763] ffff88801a44be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.269376] >ffff88801a44be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.269992] ^ [ 31.270516] ffff88801a44bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.271146] ffff88801a44bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.271846] ================================================================== [ 31.272543] Disabling lock debugging due to kernel taint [ 33.503955] BUG: Bad rss-counter state mm:00000000f1f0ce2b type:MM_FILEPAGES val:33 [ 33.504579] BUG: Bad rss-counter state mm:00000000f1f0ce2b type:MM_ANONPAGES val:22 [ 33.884193] BUG: Bad rss-counter state mm:0000000017107691 type:MM_FILEPAGES val:33 [ 33.884772] BUG: Bad rss-counter state mm:0000000017107691 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13802' (ECDSA) to the list of known hosts. 2023/06/21 05:46:58 fuzzer started 2023/06/21 05:46:58 dialing manager at localhost:36067 2023/06/21 05:46:58 checking machine... 2023/06/21 05:46:58 checking revisions... [ 34.619394] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:46:58 testing simple program... [ 34.666216] cgroup: Unknown subsys name 'net' [ 34.705873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:46:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007f5bdf327fef RSP=ffff888018cc7498 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f5bdf327fef R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d905d RFL=00000286 [--S--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 00007f5bde4e4700 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=00007ffa21f86980 CR3=000000000d8a8000 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=2037353a36343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000e96a RBX=ffffffff87b6c480 RCX=0000000000000000 RDX=ffff888019c0b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806cf09ca8 R8 =0000000000000006 R9 =002aa5dc5d9dffa8 R10=003b9aca00000000 R11=ffff88806cf09ff8 R12=0000000000000000 R13=ffffffff87b6c510 R14=000000006640a65d R15=ffffffff87b6c4a8 RIP=ffffffff814c0404 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 =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=00007f052e803328 CR3=000000001a4d8000 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