syzkaller login: [ 129.852129] BUG: Bad rss-counter state mm:000000001ea8bfbb type:MM_FILEPAGES val:33 [ 129.853378] BUG: Bad rss-counter state mm:000000001ea8bfbb type:MM_ANONPAGES val:22 [ 129.892497] ================================================================== [ 129.893733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 129.895014] Read of size 8 at addr ffff88800c82b310 by task sshd/219 [ 129.895967] [ 129.896186] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 129.897413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 129.898578] Call Trace: [ 129.898906] [ 129.899233] dump_stack_lvl+0x91/0xf0 [ 129.899742] print_report+0xcc/0x620 [ 129.900267] ? __virt_addr_valid+0x102/0x340 [ 129.900864] ? vma_interval_tree_remove+0xc75/0xec0 [ 129.901620] ? vma_interval_tree_remove+0xc75/0xec0 [ 129.902389] kasan_report+0xbe/0xf0 [ 129.902981] ? vma_interval_tree_remove+0xc75/0xec0 [ 129.903616] vma_interval_tree_remove+0xc75/0xec0 [ 129.904219] vma_prepare+0xc54/0x11a0 [ 129.904673] __split_vma+0x5af/0x950 [ 129.905124] ? __pfx___split_vma+0x10/0x10 [ 129.905623] ? find_held_lock+0x2c/0x110 [ 129.906150] do_vmi_align_munmap+0x2ba/0x11f0 [ 129.906760] ? lock_is_held_type+0x9f/0x120 [ 129.907297] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 129.907909] ? mtree_range_walk+0x632/0x900 [ 129.908476] ? mas_walk+0x5c7/0x7c0 [ 129.908950] do_vmi_munmap+0x1f1/0x2b0 [ 129.909455] mmap_region+0x1f9/0x2660 [ 129.909942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 129.910461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 129.911204] ? __pfx_lock_acquire+0x10/0x10 [ 129.911763] ? __pfx_mmap_region+0x10/0x10 [ 129.912314] ? security_mmap_addr+0x7d/0xa0 [ 129.912852] ? get_unmapped_area+0x1f5/0x3f0 [ 129.913418] do_mmap+0x854/0xf00 [ 129.913860] vm_mmap_pgoff+0x1a6/0x3a0 [ 129.914376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 129.914938] ksys_mmap_pgoff+0x3af/0x500 [ 129.915439] do_syscall_64+0x3f/0x90 [ 129.915915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 129.916557] RIP: 0033:0x7f8ca4b78d82 [ 129.917013] 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 [ 129.919190] RSP: 002b:00007ffd2619db68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 129.920091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ca4b78d82 [ 129.920930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ca3fb2000 [ 129.921775] RBP: 00007f8ca3fb2000 R08: 0000000000000009 R09: 0000000000001000 [ 129.922615] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565447d24ec0 [ 129.923452] R13: 00007ffd2619db80 R14: 00007ffd2619dbb0 R15: 00007ffd2619df10 [ 129.924308] [ 129.924599] [ 129.924811] Allocated by task 212: [ 129.925236] kasan_save_stack+0x22/0x50 [ 129.925737] kasan_set_track+0x25/0x30 [ 129.926222] __kasan_slab_alloc+0x59/0x70 [ 129.926751] kmem_cache_alloc+0x16b/0x370 [ 129.927266] vm_area_dup+0x20/0x160 [ 129.927717] __split_vma+0x170/0x950 [ 129.928179] split_vma+0xc6/0x110 [ 129.928617] mprotect_fixup+0x8d2/0xb30 [ 129.929112] do_mprotect_pkey+0x87e/0xd40 [ 129.929627] __x64_sys_mprotect+0x78/0xc0 [ 129.930154] do_syscall_64+0x3f/0x90 [ 129.930658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 129.931296] [ 129.931508] Freed by task 212: [ 129.931905] kasan_save_stack+0x22/0x50 [ 129.932426] kasan_set_track+0x25/0x30 [ 129.932930] kasan_save_free_info+0x2b/0x50 [ 129.933455] __kasan_slab_free+0x10a/0x190 [ 129.933982] kmem_cache_free+0x10d/0x4d0 [ 129.934498] rcu_core+0x8c8/0x2860 [ 129.934940] __do_softirq+0x1b7/0x7d4 [ 129.935426] [ 129.935642] Last potentially related work creation: [ 129.936223] kasan_save_stack+0x22/0x50 [ 129.936731] __kasan_record_aux_stack+0x8e/0xa0 [ 129.937374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 129.938015] remove_vma+0x139/0x170 [ 129.938481] do_vmi_align_munmap+0xd4a/0x11f0 [ 129.939044] do_vmi_munmap+0x1f1/0x2b0 [ 129.939533] __vm_munmap+0x138/0x3a0 [ 129.939996] __x64_sys_munmap+0x59/0x80 [ 129.940493] do_syscall_64+0x3f/0x90 [ 129.940982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 129.941628] [ 129.941843] The buggy address belongs to the object at ffff88800c82b2b8 [ 129.941843] which belongs to the cache vm_area_struct of size 168 [ 129.943370] The buggy address is located 88 bytes inside of [ 129.943370] freed 168-byte region [ffff88800c82b2b8, ffff88800c82b360) [ 129.944772] [ 129.944988] The buggy address belongs to the physical page: [ 129.945645] page:00000000b19281ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc82b [ 129.946727] memcg:ffff88800eade201 [ 129.947155] flags: 0x100000000000200(slab|node=0|zone=1) [ 129.947795] page_type: 0xffffffff() [ 129.948243] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 129.949151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eade201 [ 129.950055] page dumped because: kasan: bad access detected [ 129.950728] [ 129.950942] Memory state around the buggy address: [ 129.951517] ffff88800c82b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 129.952368] ffff88800c82b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 129.953213] >ffff88800c82b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 129.954055] ^ [ 129.954524] ffff88800c82b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 129.955376] ffff88800c82b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 129.956222] ================================================================== [ 129.957233] Disabling lock debugging due to kernel taint [ 131.992374] BUG: Bad rss-counter state mm:00000000206b1df7 type:MM_FILEPAGES val:33 [ 131.993405] BUG: Bad rss-counter state mm:00000000206b1df7 type:MM_ANONPAGES val:22 [ 132.546357] BUG: Bad rss-counter state mm:0000000019e06265 type:MM_FILEPAGES val:33 [ 132.547509] BUG: Bad rss-counter state mm:0000000019e06265 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17026' (ECDSA) to the list of known hosts. 2023/06/19 12:37:04 fuzzer started 2023/06/19 12:37:04 dialing manager at localhost:44161 2023/06/19 12:37:04 checking machine... 2023/06/19 12:37:04 checking revisions... [ 133.199430] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:37:04 testing simple program... [ 133.259431] cgroup: Unknown subsys name 'net' [ 133.320732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f6355e28000 CR3=000000000db28000 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=e55f2212061eddbd9b4f5b8b0d7b311e XMM02=ec2efd57dc4c00df0000000000128980 XMM03=1387b760adf437320000000000128a50 XMM04=dffbb2ca4eeac8d100000000000ae988 XMM05=dfcdbad4f1609c37000000000013ca78 XMM06=93a987ef3f5648e9000000000013b8e0 XMM07=e042d86d42eb936e000000000012d038 XMM08=1387b760adf437320000000000128a50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000037db00 RBX=ffff88800df6cab0 RCX=ffff88800844f780 RDX=ffff88808df6cab0 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff888017f17a38 R8 =ffff88800df6cab0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=dffffc0000000000 R13=ffff888017f17a78 R14=0000000000000000 R15=ffff88800da2c390 RIP=ffffffff81810213 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 00007f6be3085900 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=00007ffccce4e000 CR3=000000000c5ba000 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=6720646572637465733a4d41503d706f 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