syzkaller login: [ 41.736971] BUG: Bad rss-counter state mm:000000001585f725 type:MM_FILEPAGES val:33 [ 41.738837] BUG: Bad rss-counter state mm:000000001585f725 type:MM_ANONPAGES val:22 [ 41.898528] ================================================================== [ 41.899486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.900456] Read of size 8 at addr ffff88800dc32798 by task sshd/220 [ 41.901464] [ 41.901690] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.902571] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.903595] Call Trace: [ 41.903926] [ 41.904219] dump_stack_lvl+0x91/0xf0 [ 41.904726] print_report+0xcc/0x620 [ 41.905249] ? __virt_addr_valid+0x102/0x340 [ 41.905816] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.906467] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.907098] kasan_report+0xbe/0xf0 [ 41.907583] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.908226] vma_interval_tree_remove+0xc75/0xec0 [ 41.908852] vma_prepare+0xc54/0x11a0 [ 41.909348] __split_vma+0x5af/0x950 [ 41.909825] ? __pfx___split_vma+0x10/0x10 [ 41.910361] ? find_held_lock+0x2c/0x110 [ 41.910900] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.911477] ? lock_is_held_type+0x9f/0x120 [ 41.912026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.912643] ? mtree_range_walk+0x632/0x900 [ 41.913211] ? mas_walk+0x5c7/0x7c0 [ 41.913705] do_vmi_munmap+0x1f1/0x2b0 [ 41.914211] mmap_region+0x1f9/0x2660 [ 41.914695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.915226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.915963] ? __pfx_lock_acquire+0x10/0x10 [ 41.916501] ? __pfx_mmap_region+0x10/0x10 [ 41.917055] ? security_mmap_addr+0x7d/0xa0 [ 41.917599] ? get_unmapped_area+0x1f5/0x3f0 [ 41.918166] do_mmap+0x854/0xf00 [ 41.918616] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.919130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.919695] ksys_mmap_pgoff+0x3af/0x500 [ 41.920220] do_syscall_64+0x3f/0x90 [ 41.920719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.921387] RIP: 0033:0x7ff8d734ed82 [ 41.921854] 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 [ 41.924005] RSP: 002b:00007ffd5d57e918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.924934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8d734ed82 [ 41.925795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8d6788000 [ 41.926658] RBP: 00007ff8d6788000 R08: 0000000000000009 R09: 0000000000001000 [ 41.927528] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566492c2ec0 [ 41.928386] R13: 00007ffd5d57e930 R14: 00007ffd5d57e960 R15: 00007ffd5d57ecc0 [ 41.929272] [ 41.929569] [ 41.929791] Allocated by task 213: [ 41.930235] kasan_save_stack+0x22/0x50 [ 41.930750] kasan_set_track+0x25/0x30 [ 41.931248] __kasan_slab_alloc+0x59/0x70 [ 41.931785] kmem_cache_alloc+0x16b/0x370 [ 41.932305] vm_area_dup+0x20/0x160 [ 41.932772] __split_vma+0x170/0x950 [ 41.933264] split_vma+0xc6/0x110 [ 41.933709] mprotect_fixup+0x8d2/0xb30 [ 41.934216] do_mprotect_pkey+0x87e/0xd40 [ 41.934752] __x64_sys_mprotect+0x78/0xc0 [ 41.935278] do_syscall_64+0x3f/0x90 [ 41.935766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.936409] [ 41.936627] Freed by task 213: [ 41.937042] kasan_save_stack+0x22/0x50 [ 41.937555] kasan_set_track+0x25/0x30 [ 41.938058] kasan_save_free_info+0x2b/0x50 [ 41.938602] __kasan_slab_free+0x10a/0x190 [ 41.939147] kmem_cache_free+0x10d/0x4d0 [ 41.939671] rcu_core+0x8c8/0x2860 [ 41.940134] __do_softirq+0x1b7/0x7d4 [ 41.940614] [ 41.940853] Last potentially related work creation: [ 41.941458] kasan_save_stack+0x22/0x50 [ 41.941978] __kasan_record_aux_stack+0x8e/0xa0 [ 41.942673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.943329] remove_vma+0x139/0x170 [ 41.943788] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.944350] do_vmi_munmap+0x1f1/0x2b0 [ 41.944853] __vm_munmap+0x138/0x3a0 [ 41.945328] __x64_sys_munmap+0x59/0x80 [ 41.945829] do_syscall_64+0x3f/0x90 [ 41.946306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.946958] [ 41.947174] The buggy address belongs to the object at ffff88800dc32740 [ 41.947174] which belongs to the cache vm_area_struct of size 168 [ 41.948668] The buggy address is located 88 bytes inside of [ 41.948668] freed 168-byte region [ffff88800dc32740, ffff88800dc327e8) [ 41.950102] [ 41.950322] The buggy address belongs to the physical page: [ 41.950982] page:000000006e7bc044 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc32 [ 41.952065] memcg:ffff888019ad3701 [ 41.952490] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.953188] page_type: 0xffffffff() [ 41.953650] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.954585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ad3701 [ 41.955512] page dumped because: kasan: bad access detected [ 41.956183] [ 41.956415] Memory state around the buggy address: [ 41.957041] ffff88800dc32680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.957914] ffff88800dc32700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.958809] >ffff88800dc32780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.959702] ^ [ 41.960217] ffff88800dc32800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.961108] ffff88800dc32880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.961983] ================================================================== [ 41.962947] Disabling lock debugging due to kernel taint [ 44.428067] BUG: Bad rss-counter state mm:0000000060efd054 type:MM_FILEPAGES val:33 [ 44.429088] BUG: Bad rss-counter state mm:0000000060efd054 type:MM_ANONPAGES val:22 [ 44.884550] BUG: Bad rss-counter state mm:000000006bc4a030 type:MM_FILEPAGES val:33 [ 44.886017] BUG: Bad rss-counter state mm:000000006bc4a030 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14323' (ECDSA) to the list of known hosts. 2023/06/20 07:18:47 fuzzer started 2023/06/20 07:18:48 dialing manager at localhost:44161 2023/06/20 07:18:48 checking machine... 2023/06/20 07:18:48 checking revisions... [ 45.612028] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:18:48 testing simple program... [ 45.664197] cgroup: Unknown subsys name 'net' [ 45.714911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:18:37 Registers: info registers vcpu 0 RAX=1ffff11001d4698f RBX=ffff88800ea34c48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ea34c78 RBP=ffff88800ce50c80 RSP=ffff88801c9ffd28 R8 =0000000000000001 R9 =ffffed100393ff99 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800ce50ec0 R14=ffffffff81ef13be R15=ffff888008ed7800 RIP=ffffffff81846362 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 00007f8ef7e03900 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=00007fff4b64d000 CR3=000000000dc18000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f103897bbc0 CR3=000000001373a000 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=beccfdd3d79379b4794767d72c970f6c XMM02=ec2efd57dc4c00df000000000011d080 XMM03=422906c8e96d0104000000000011d150 XMM04=174e84c106eefe5400000000000ae988 XMM05=19e9129bd510f2350000000000134558 XMM06=8ca387e52590435e00000000001333c0 XMM07=e042d86d42eb936e0000000000124cf0 XMM08=422906c8e96d0104000000000011d150 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000